Project Proponent: SPECTRUM DYEING PRIVATE...

Pre-Feasibility report Greenfield Facility of Manufacturing Plant for H-Acid and Vinyl Sulphone at Village Suryapur, Tehsil and District 24 Parganas (N)

West Bengal

Project Proponent:

SPECTRUM DYEING PRIVATE LIMITED

October 2014

2014

CONTENTS

1 EXECUTIVE SUMMARY ................................................................................. 4

2 INTRODUCTION ........................................................................................... 5

2.1 BRIEF DESCRIPTION OF THE PROJECT ................................................................ 5

2.2 NEED FOR THE PROJECT AND ITS IMPORTANCE TO REGION ......................................... 5

2.3 EMPLOYMENT GENERATION (DIRECT AND INDIRECT) DUE TO THE PROJECT....................... 5

3 PROJECT DESCRIPTION ............................................................................... 6

3.1 TYPE OF PROJECT INCLUDING INTERLINKED AND INTERDEPENDENT PROJECTS, IF ANY .......... 6

3.2 LOCATION (SPECIFIC LOCATION AND PROJECT BOUNDARY & PROJECT LAY OUT) WITH

COORDINATES ................................................................................................... 6

3.3 DETAILS OF ALTERNATE SITES CONSIDERED AND THE BASIS OF SELECTING THE PROPOSED SITE,

PARTICULARLY THE ENVIRONMENTAL CONSIDERATIONS GONE INTO SHOULD BEHIGHLIGHTED ........... 7

3.4 SIZE OR MAGNITUDE OF OPERATION ................................................................. 7

3.5 TECHNOLOGY AND PROCESS DESCRIPTION .......................................................... 8

3.6 RAW MATERIALS ...................................................................................... 12

3.7 ADDITIVES AND CHEMICALS .......................................................................... 14

3.8 RAW MATERIAL REQUIRED ALONG WITH ESTIMATED QUANTITY, LIKELY SOURCE, MARKETING

AREA OF FINAL PRODUCTS, MODE OF TRANSPORT OF RAW MATERIAL AND FINISHED PRODUCT. ....... 14

3.8.1 Transportation details of Raw Materials.................................................... 14

3.9 AVAILABILITY OF WATER ITS SOURCE, ENERGY/POWER REQUIREMENT AND SOURCE SHOULD BE

GIVEN 14

3.9.1 Fuel .............................................................................................. 14

3.9.2 Quantity of waste to be generated (liquid and solid) and scheme for their

management /disposal .................................................................................. 15

4 SITE ANALYSIS .................................................. ERROR! BOOKMARK NOT DEFINED.

4.1 CONNECTIVITY ....................................................... ERROR! BOOKMARK NOT DEFINED.

4.2 CLIMATIC DATA FROM SECONDARY SOURCES ..................... ERROR! BOOKMARK NOT DEFINED.

4.3 WEATHER ............................................................ ERROR! BOOKMARK NOT DEFINED.

4.3.1 Climate ....................................................... Error! Bookmark not defined.

4.3.2 Wind .......................................................... Error! Bookmark not defined.

4.3.3 Cloud Cover ................................................. Error! Bookmark not defined.

4.4 SOCIAL INFRASTRUCTURE AVAILABLE .............................. ERROR! BOOKMARK NOT DEFINED.

5 PROPOSED INFRASTRUCTURE .................................................................... 18

5.1 INDUSTRIAL AREA (PROCESSING AREA) ............................................................. 18

5.2 RESIDENTIAL AREA (NON-PROCESSING AREA) ..................................................... 18

5.3 GREEN BELT .......................................................................................... 18

5.4 DRINKING WATER MANAGEMENT (SOURCE & SUPPLY OF WATER) ................................ 18

5.5 SEWAGE SYSTEM ..................................................................................... 18

5.6 INDUSTRIAL WASTE MANAGEMENT................................................................... 18

5.7 POWER REQUIREMENT & SUPPLY/ SOURCE ........................................................ 19

6 REHABILITATION AND RESETTLEMENTS (R& R) PLAN ..................................... 20

6.1 POLICY TO BE ADOPTED (CENTRAL/STATE) IN RESPECT OF THE PROJECT AFFECTED PERSONS

INCLUDING HOME OUSTEES, LAND OUSTEES AND LANDLESS LABOURERS (A BRIEF OUTLINE TO BE

GIVEN) 20

7 PROJECT SCHEDULE AND COST ESTIMATE ................................................... 21

7.1 LIKELY DATE OF START OF CONSTRUCTION AND LIKELY DATA OF COMPLETION (TIME SCHEDULE

FOR THE PROJECT TO BE GIVEN) ............................................................................ 21

7.2 ESTIMATED PROJECT COST ALONG WITH ANALYSIS IN TERMS OF ECONOMIC VIABILITY OF THE

PROJECT. ...................................................................................................... 21

8 ANALYSIS OF PROPOSAL .................................... ERROR! BOOKMARK NOT DEFINED.

1 EXECUTIVE SUMMARY

Spectrum Dyeing (P) Limited is planning Greenfield Manufacturing facility at village Suryapur, Tehsil &

District 24 Parganas (N), West Bengal.

The Proposed Greenfield Project falls under „Section 5(f)‟ Manufacturing / Production of Synthetic

Organic Chemicals & „Category “A”.

1. Name of the Industry Spectrum Dyeing Private Limited

2. Products to be manufactured H-Acid (200 MT/Month) and Vinyl

Sulphone (100 MT/Month)

3. Total Plot Area 8026.82 sq.m

4. Water Requirement Total Water requirement is 200 KLD.

Fresh Water Requirement: 96.5 KLD

Recycle Water: 103.5 KLD

Water will be sourced from Borewell

system at site.

5. Power Requirement 110 KW (Source: West Bengal State

Electricity Distribution Company

Limited)

Back Up : 130 KVA

6. Manpower Requirement 40

7. Total Project cost Rs. 40 Crore

8. Recurring cost/ annum for environmental

pollution control measures

Approx. 36 Lacs

2 INTRODUCTION

2.1 Brief Description of the Project


District 24 Parganas (N), West Bengal

2.2 Need for the project and its importance to region

Among chemicals, Global Dyestuff industry is a multi billion industry and comprises of products

including Dyes, Pigments and Intermediates. Market demand for dye and dye intermediates is growing

at a Compounded Annual Growth Rate (CAGR) of 4-5% globally.

Dyestuff can be used for Printing inks, plastics, textiles, paper and foodstuff. Today, the markets for

dyes are predominantly dominated by reactive as well as disperse dyes and in future also these two

types of dyes are expected to grow further. With nations like China, South Korea and Taiwan emerging

as strong players in field of disperse dyes, India has taken lead in production of reactive dyes as the

availability of an intermediate called vinyl sulphone in the country. Presently, the dye and dye

intermediaries industry has grown as an integral part of many industries operating in the market.

With the current size of approximately $108 billion, the Indian chemical industry accounts for about 3%

of the global chemical industry. In terms of volume, India is the third-largest producer of chemicals in

Asia, after China and Japan. In the base case scenario, with current initiatives of industry &

government, the Indian chemical industry could grow at 11% p.a. to reach size of $224 billion by 2017.

2.3 Employment Generation (Direct and Indirect) due to the project

The proposed project is manufacturing unit and as such will generated direct as well as indirect

employment and will benefit local /nearby persons.

Spectrum Dyeing (P) Limited, WB generates the employment on various levels time to time and gives

the priority to local persons.

3 PROJECT DESCRIPTION

3.1 Type of Project including interlinked and interdependent projects, if any

The Proposed Project comes under „Section 5(f)‟ Synthetic organic chemicals industry (dyes & dye

intermediates; bulk drugs and intermediates excluding drug formulations; synthetic rubbers; basic organic

chemicals, other synthetic organic chemicals and chemical intermediates)

As per EIA notification dated 14th September 2006 and its amendment on 1

st December 2009, project is

located outside the notified industrial area/estate; therefore project comes under in category A.

No interlinked project.

3.2 Location (specific location and project boundary & project lay out) with coordinates


District 24 Parganas (N), West Bengal. Proposed project is located at 22°44‟44.86” N & 88°25‟16.11”E.

Figure 1 : Location map

Figure 2: Site Details

3.3 Details of alternate sites considered and the basis of selecting the proposed site,

particularly the environmental considerations gone into should be highlighted

There is no interlinked project.

Since the objective is to manufacture Synthetic Organic Chemicals, a lush green & friendly environment is

being selected for installing the plant. The salubrious pollution free climate of West Bengal makes it an

ideal location for the health and medical care industry.

The project is not likely to cause any significant impact to the ecology of the area since adequate

preventive measures will be adopted to control various pollutants within permissible limits. Green belt

development around the area has been and shall be taken up as an effective pollution mitigative technique.

3.4 Size or Magnitude of Operation

Total Production Capacity

S. No. Product Name License Capacity

1 H-Acid 200 MT/Month

2 Vinyl Sulphone 100 MT/Month

By-Product Generation

S.No. Product Name License

Capacity Origin

1 Sodium sulphate 400 MT/Month From H-acid

2 Gypsum 1350MT/Month From H-acid and ZED plant

3 Liquid sodium Bi

sulphate 75 MT/Month From H-acid

4 Dil Nitric acid / Nitrite

solution 75 MT/Month From H-acid

5 Iron sludge 250 MT/Month From H-acid

3.5 Technology and Process Description

H-Acid:

Sulphonation:

The Sulphonation is carried out in a C.I. Sulphonator; Naphthalene is heated with Sulfuric Acid and Oleum

(65%) at a temperature of 80oC, 145

oC, 160

oC. Trisulfonation takes place and Naphthalene – 1,3,6 sulfonic

acid is formed. A little water is added and the sulfonated mass is blown in to the nitrator.

Nitration:

The Nitration is carried out in SS Nitrator. The sulfonated mass is cooled at 40oC. Nitric Acid 60% is added

keeping temperature between 40oC-45

oC. Nitration takes place and 8 Nitro Naphthalene 1-3-6 Sulfonic

Acid is formed. The nitrated mass is brought to the neutralizer.

Neutralization:

The Neutralization is carried out in a MSRLTL vessel. Water and Sodium Sulphate is charged into the

neutralizer. The nitrated mass from nitrated is received. As the temperature rises to 72 to 75oC, NOx fumes

are generated. The gases are thoroughly scrubbed.

Lime slurry is then added. The excess Sulfuric Acid is neutralized and Calcium Sulfate is formed. The

neutralized slurry is heated to 90oC and filtered in vertical filter/belt filter. The gypsum cake is washed with

hot water. The filtrate and washes containing the Sodium Salt of 8 Nitro Naphthalene 1-3-6 Trisulfonic Acid

(Nitro Solution) is taken for reduction. Gypsum cake is stored in allotted areas.

Reduction:

The Reduction is carried out in a MSRLTL vessel. Water, Iron Powder and Acetic Acid is charged into the

reduction vessel. The mass is heated to 95oC. Nitro solution is gradually added at 95-98

oC. During

reduction, 8 Amino Naphthalene 1, 3, 6 Trisulfonic (Amino Solution) is formed. Soda Ash is added to

precipitate soluble iron salts into iron oxide. The reduction mass is filtered in vertical filter press. Iron oxide

sludge is washed well with hot water. The filtrate and washes is taken for concentration and iron sludge is

stored in allotted areas.

Catalytic Hydrogenation Reaction (substitute Process) is in our R&D under development.

Concentration:

The Amine Solution contains about 13 to 15% 8 Amino Naphthalene 1,3,6 Trisulfonic Acid. This is

concentrated in SS triple effect falling film evaporated to amine content of 42 to 43%. The concentrated

amine solution is taken for alkaline fusion.

Methanolic Solvent Fussion:

The Methanolic Solvent Fussion reaction is carried out in a MS Auto Clave. Concentrated Amine solution is

heated with caustic soda lye, start the distillation. Draw the maximum water from the amine solution and

this concentrated amine solution is heated with Methanol with temperature 185oC to 190

oC and at 26 to 28

Kg/cm2 pressure.

Acid Isolation:

Isolation (Crystallization) is carried out in a MSRLTL vessel. Water and Dilute Spent is charged into the

vessel. The fusion mass is gradually received. During isolation H-Acid is precipitated. Sulphur Dioxide is

generated. The gases are scrubbed. The isolated slurry is maintained at 90-95oC & pH 1-1.5. After

compete removals of Sulphur Dioxide, the slurry is cooled at 60oC and filtered on Belt Filter. The filter cake

is dried in spray dryer. The H-Acid cake is washed well with water. The filtrate is taken to the Zero Effluent

Discharge Plant (ZED plant) for treatment.

Manufacturing of Vinyl Sulphone

In reduction vessels the slurry of sodium bisulphate, caustic lye and water is prepared and gradual

addition of wet cake of ASC is carried out. The pH is maintained around 7 using little quantity of

sulphuric acid and temperature is maintained around 55 0C using circulation chilled water.

The reacted mass from reduction vessel is taken to another reactor for carrying out condensation

with ethylene oxide with sulphuric acid. The temperature is maintained around 50 0C using cooling

water recirculation.

The condensed mass is vacuum filtered. The filtrate containing about 15 to 20% of Glauber salt is

taken for recovery of Glaubber salt and the rest of the filtrate is sent to the incinerator for zero

discharge.

The wet cake of condensed mass is dried.

Naphthaleane

Sulphuric acid (98%)

Oleum acid (23%)

Water

Sodiumsulphate CO 2 gas

Lime stone powder NO 2 gas

water

CI powder

Acetic acid

Soda ash

Steam

Steam

Caustic soda flaks

Methanol

Water

Dil spent Acid (22%)

Sulphuric acid (98%) SO x Gas

water

Water Effluent water

(H-mother liquor)

Condansate water

Distillate water

Recovered methanol

Sox Scrubber

CONCENTRATION

FUSSION

ISOLATION

FILTRATION &

CENTRIFUGE

1-Amino,8-

Napthol,3,6, Di-

sulphonic acid

DRYING

FILTRATION

Steam vapor to

atmosphere

Hot washing water FILTRATIONIron sludge as a solid

waste

WaterCalcium sulphate as a

gypsum solid waste

REDUCTION

H-ACID PROCESS FLOW DIAGRAM

SULPHONATION

NITRATION

Nox Scrubber

Nitric Acid (61-62%)

NEUTRALISATION

Dried condensed mass is subjected to esterification using concentrated sulphuric acid of 98%.

The vapours evolved during esterification are taken to condenser through vacuum to obtain acetic

acid.

The esterified mass is Vinyl Sulphone. It is pulverized and packed.

EQMS INDIA PVT LTD | APRIL 2014 12

3.6 Raw Materials

Table 3-1: Storage Details of Raw Material (H-Acid Plant)


S. No. Raw Materials Quantity (MT/Month) Control Measure Provided

1. Naphthalene 185 Sufficient Ventilated Godown

2. Oleum (65%) 575 Ventury scrubber on H2SO4 tank

3. Sulphuric Acid (98%) 375 Breathing valve

4. Nitric Acid (60%) 200 Breathing valve

5. Lime Stone 900 Sufficient Ventilated Godown

6. Glaubber Salt 500 Sufficient Ventilated Godown

7. Iron Powder 200 Sufficient Ventilated Godown

8. Soda Ash 90 Sufficient Ventilated Godown

9. Caustic Soda 375 Sufficient Ventilated Godown

10. Spent Sulphuric Acid (20% to 30%) 175 Breathing valve

11. Methanol 19 Flame arrester and breathing valve

12. Sodium Bisulphite 23 Sufficient Ventilated Godown

Table 3-2: Storage Details of Raw Material (Vinyl Sulphone Plant)

S. No. Raw Materials Quantity (MT/Month) Control Measure Provided

1. ASC Mass 130 Sufficient Ventilated Godown

2. Caustic Lye 150 Sufficient Ventilated Godown

3. Sodium Bisulphite 50 Sufficient Ventilated Godown

4. Ethylene Oxide 27 Dyke Wall, sprinkler system, leakage gas indicator

5. Sulphuric Acid (98%) 50 Breathing valve


3.7 Additives and Chemicals

No

3.8 Raw material required along with estimated quantity, likely source, marketing area of

final products, mode of transport of raw material and finished product.

3.8.1 Transportation details of Raw Materials

The transportation of raw materials will be done by road complying with all safety requirements as per

MSHIC rule.

3.9 Availability of water its source, energy/power requirement and source should be

given

Water will be abstracted from bore well at site.

Table 3-3: Water consumption (Approximate)

S. NO.

Water Consumption Area Total Water

Consumption, KLD

Fresh Water Requirement, KLD

Recycle Water, KLD

1 Domestic 5.5 3.5 NIL

2 Industrial

I. Processing 104.5 65.5 50

II. Cooling Tower 40 NIL 40

III. Boiler / Softening Plant 40 26 13

v. Laboratory 2.0 1.5 0.5

3 Gardening 8.0 NIL 8.0

TOTAL 200.0 96.5 103.5

3.9.1 Fuel

Table 3-4: Fuel Consumption

S. NO.

Stack Attached to Type of

Fuel Stack

Height in m Fuel consumption in

KL/Hr of MT/Hr

No. of Operating

Hours

1 Steam Boiler Petcoke /

Coal 35 1 T/Hr / 2.5 T/Hr 20

2 Thermo pack Boiler Petcoke /

Coal 35 0.2 T/Hr / 0.4 T/Hr 20

3 Spray Dryer HAG for H-

acid Petcoke /

Coal 35 0.15 T/Hr /0.3 T/Hr 20

4 Spray Dryer For ZED plant Petcoke /

Coal 35 0.15 T/Hr / 0.3 T/Hr 20

5 Spin flash Dryer Petcoke/

Coal 35 0.05 T/Hr / 0.1 T/Hr 15


*Note: Dg Sets will be used only during Power failure.

3.9.2 Quantity of waste to be generated (liquid and solid) and scheme for their management

/disposal

Table 3-3: Waste Water Generation Details

S No.

Effluent Generation Area Total KLD Disposal Mode

1 Domestic 4.5 KLD Soak pit

2 Industrial

i. Processing& Scrubbing 30 KLD Send to ZED plant for treatment&

Recovery

iii. Cooling tower 10 KLD For Gardening and Green belt

iv. Boiler 10 KLD For Gardening and Green belt

v. Softening plant / DM Plant / RO etc.

10 KLD For Gardening and Green belt

3 Gardening 5.0

INDUSTRIAL TOTAL 69.5 KLD 64.5 KLD to ZED + 5 KLD for

Gardening in rainy season all to ZED

Table 3-4: Hazardous Waste Generation and disposal Details

S No.

Waste Stream Waste

Category No. Generation Disposal Method

1 Gypsum Solid waste (H-

acid) 26.1 of

Schedule-1 1350 MT/Month

Collection, Storage, Transportation, Disposal

By selling to authorized Red oxide and Cement Factory

2 Iron sludge Solid waste

(H-acid)

26.1 of Schedule-1

250 MT/Month



3 ZED waste sludge OR

Inclinator Ash 34.3 of Schedule

175 MT


To Authorized solid disposal site

4 Fly ash ---------------- 100 MT

Collection, Storage, Transportation, and sell to Brick mfg./road construction company

also use for road leveling

5 ETP Gypsum Sludge

34.3 of Schedule

500 MT



6 Glaubber Salt (Vinyl

Sulphone) 26.2 of

Schedule 10080 MT

Collection, storage, transportation, disposal by re-use in H-acid plant & left over

quantity sell to authorized buyer


4 SITE ANALYSIS

4.1 Connectivity

S. No Location Distance in KM

1 Village Suryapur

2 Tehsil 24 Parganas (N)

3 District 24 Parganas (N)

4 State West Bengal

5 Nearest Railway Station Barrackpore Railway Station – 5.39 km (NW)

7 Nearest Air Port Calcutta Netaji Subhas Chand Bose International

Airport– 11 Km (S)

S.

No.

Information/Checklist

confirmation

Yes /

No?

Details thereof (with approximate quantities /

rates, wherever possible) with source of

information data

1 Areas protected under

international conventions,

national or local legislation for

their ecological, landscape,

cultural or other related value

No

There are no Areas protected under international

conventions, national or local legislation for their

ecological, landscape, cultural or other related

value

2 Areas which are important or

sensitive for ecological reasons

-Wetlands, watercourses or

other water bodies, coastal

zone, biospheres, mountains,

forests

Yes There is a river called Hoogly (5.76 km,W)

3 Areas used by protected,

important or sensitive species

of flora or fauna for breeding,

nesting, foraging, resting, over

wintering, migration

No

There are no Areas protected under international

conventions, national or local legislation for their

ecological, landscape, cultural or other related

value

4 Inland, coastal, marine or

underground waters Yes There is a river called Hoogly (5.76 km,W)

5 State, National boundaries No

There is no State boundary in the 10 km radius

area.

6 Routes or facilities used by the

public for access to recreation

or other tourist, pilgrim areas

Yes Nilganj road,0.18 km,W

NH-34,6.44km,SE

7 Defense installations Yes

There is a Barrackpur Contonment at a distance

of 6.66 km(NW)

8 Densely populated or built-up Yes Titagarh(.3.37 km,W),Kharda(SW,4.00 km)


S.

No.

Information/Checklist

confirmation

Yes /

No?

Details thereof (with approximate quantities /

rates, wherever possible) with source of

information data

area

9 Areas occupied by sensitive

man-made land uses

(hospitals, schools, places of

worship, community facilities)

Yes

Shantinagar High school,NW,5.78km

Bholananada National vidalaya,5.60 km,NW

Dr B N Bose General hospital,5.17,W

10 Areas containing important,

high quality or scarce

resources (ground water

resources, surface resources,

forestry, agriculture, fisheries,

tourism, minerals)

No

11 Areas already subjected to

pollution or environmental

damage. (Those where existing

legal environmental standards

are exceeded)

No -

12 Areas susceptible to natural

hazard which could cause the

project to present

environmental problems

(earthquakes, subsidence,

landslides, erosion, flooding or

extreme or adverse climatic

conditions)

Project area falls in the seismic zone-III(Moderate Risk Zone)

4.2 Climatic data from secondary sources

The district is characterized by hot and humid climate. It receives adequate rainfall from North-East and South-West monsoons which set in the latter half of June and withdraw by the middle of October. Pre-monsoon rains are received during March-April. May is the hottest month with temperature as high as 40°C and January is the coldest month with temperature as low as 10°C. The normal annual rainfall in this district is of the tune of 1800 mm.

Description Particulars

Rainfall 1800 mm(Normal)

Temperature 400C in May(Max) and 10

0C in

January(Min)

Relative

Humidity

Between 50% in March & 90%

in July


5 PROPOSED INFRASTRUCTURE

5.1 Industrial Area (processing area)

Not Applicable

5.2 Residential Area (non-processing area)

Not Applicable

5.3 Green belt

33% of total plot area will be developed as greenbelt.

5.4 Drinking water management (source & supply of water)

Water will be sourced from bore well at site. The area is safe area as per Central Ground Water Board

Classification.

5.5 Sewage system

Sewage Treatment System shall be set up at site.

5.6 Industrial waste management

Generated waste has been categorized in below categories

Domestic waste

Solid waste (Non hazardous)

Hazardous waste

Solid waste: there is no solid waste generated in the conventional manufacturing process of vinyl sulphone. In conventional liquid effluent treatement process gypsum sludge is generated. In the proposed process, solid waste is generated in clarification step after reduction.

Solid sludge is mainly containing filter aid, inorganic salts & some retained orgaincs & moisture. The organic impurties can be washed and dried solid sludge, which is containing inorganic salts, may be land filled with all precautions.

Hazardous waste:

Dye interemediate industries is one of the most polluting industries because some environmental hazards like as H-acid is liberated in chlorosulphonation stage as gas and needs to be scrubbed. Due to poor absorption recovery system, concentration of hydrochloric acid as byproduct is continuously decreasing. Excess of ethylene oxide used in condensation is hazardous and it is to be used in excess as large quantity of the some hydrolyses to glycols in presence of water. Mother liquor and washings after condensation contain glycols, sodium sulphate and sodium chloride. Also liquid effluent generated is toxic having high biological oxygen demand(BOD), chemical oxygen demand (COD) and temperory dissolved solids (TDS), which is difficult to biodegrade, and solid waste generated is hazardous. Due to poor raw material storage and handling system, like


as ethylene oxide which is transferred from ethylene oxide tanker to storage tank, large amount of ethylene oxide vapor escapes and it‟s diluted solution goes as effluent. Proposed Methods For Recovery And Treatment Of H-acid Emissions Hydrochloric acid gas is emitted from chlorosulphonation and drowning step is scrubbed with water in packed bed scrubbers. Hydrochloric acid solution is re-circulated by pump until it gets concentrated. Hydrochloric acid solution can be sold, if it is 30%. As the concentration of hydrochloric acid increases, recovery efficiency decreases. Packed bed scrubbers are not properly designed to provide effective surface area for absorption. No suction is provided for the gas. Packed columns are not properly cleaned and maintained. Recovery efficiency of hydrochloric acid is about 90%.

Proposed Methods For Recovery And Treatment Of HCl Emissions HCl gas evolved in chlorosulphonation reactor, sulphuric acid contactor and drowning vessel is passed through two packed bed scrubbers in series. Concentration of HCl is allowed to rise upto 30% in the first scrubber with re-circulation and then it is sent for sale. HCl acid solution from the second absorber, which is about 10% concentration, is then taken for circulation in the first column. Fresh water is taken in the second column. If any quantity of unabsorbed HCI gas escapes the second column, it is scrubbed in the third column by caustic soda solution. Scrubber solution at the third column is sent to effluent treatment, when the strength of caustic soda solution fall below 3% wt/wt. The exit gas is analysed for traces of HCl.

5.7 Power requirement & supply/ source

The power requirement will be available from West Bengal State Electricity Distribution Company

Limited


6 REHABILITATION AND RESETTLEMENTS (R& R) PLAN

6.1 Policy to be adopted (central/state) in respect of the project affected persons

including home oustees, land oustees and landless labourers (a brief outline to be

given)

Not Applicable

7 PROJECT SCHEDULE AND COST ESTIMATE

7.1 Likely date of start of construction and likely data of completion (time schedule for

the project to be given)

It is estimated that the project can be fully implemented in by 2014-2015 with concurrent sanction of

funds. Complete project will be implemented and commissioned in 2014.

This is a tentative schedule in which flexibility can be exercised depending upon the market demand

and fund availability.

7.2 Estimated project cost along with analysis in terms of economic viability of the

project.

Cost of Estimates of the Greenfield Project is 40 Cr. (INR). Project work will be start after getting the

environmental clearance.

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