CN201776074U - Waste gas treatment system controlled by computer - Google Patents
Waste gas treatment system controlled by computer Download PDFInfo
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- CN201776074U CN201776074U CN201020255054XU CN201020255054U CN201776074U CN 201776074 U CN201776074 U CN 201776074U CN 201020255054X U CN201020255054X U CN 201020255054XU CN 201020255054 U CN201020255054 U CN 201020255054U CN 201776074 U CN201776074 U CN 201776074U
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Abstract
The utility model discloses a waste gas treatment system controlled by a computer, which comprises a waste gas treatment device, a neutralizing device and a saline solution concentrating device. A first spray absorption tower uses neutral water as an absorption liquid; a second absorption tower uses alkaline liquor as an absorption liquid; the waste absorption liquid discharged from the first spray absorption tower is acidic; the waste absorption liquid discharged from the second spray absorption tower is alkaline; and the two absorption liquids are placed together to generate a salt, so that the industrial salt products can be recovered in the waste liquid generated in the waste gas treatment process. As the products are recovered from the waste liquid, the value added of the system is improved. The waste gas treatment system is controlled by using a computer, is simple to operate and precise to control, and has high automatic program.
Description
Technical field
The utility model relates to a kind of computer-controlled exhaust treatment system.
Background technology
The industrial waste gas that contains chlorine and hydrogen chloride gas that produces in the industrial production need be through handling, and could discharge after up to standard.China Patent No. is that 200720005231.7 utility model patent specification discloses a kind of emission-control equipment, have one-level scrubbing tower, secondary turbulent tower and three grades of turbulent towers, one-level scrubbing tower and two, three grades of turbulent towers are equipped with heat exchanger respectively one, two, No. three, and native system also has supply mains in alkali lye house steward, water inlet pipe, the cooling, cooling backwater house steward, discharge manifold in addition.Waste gas enters the one-level scrubbing tower by the blower fan traction, and the water with the contrary spray of shower nozzle in the rapid washing pipe of one-level scrubbing tower fully contacts with hydrogen chloride gas, and hydrogen chloride is after the one-level washing, and chlorine gas concentration also decreases, and enters the secondary turbulent tower again.Hydrogen chloride gas is further absorbed, and chlorine gas concentration also further reduces, and waste gas enters in three grades of turbulent towers, mainly handles chlorine.Waste gas is discharged by blower fan after three grades of absorptions.When circulation fluid is that concentration of hydrochloric acid in the absorption liquid acquires a certain degree, absorption liquid enters the hydrochloric acid storage tank by the recycling carrier pipe.Above-mentioned emission-control equipment is handled the industrial waste gas that contains chlorine and hydrogen chloride gas, make the gas of discharge up to standard, if but relief liquor is not handled, still there is pollution problem, the exhaust treatment system that does not also have to adapt to the computer programme-control and can reclaim product again at present.
Summary of the invention
The purpose of this utility model can reclaim a kind of computer-controlled exhaust treatment system of Nacl when being to propose to handle the industrial waste gas that contains chlorine and hydrogen chloride gas.
For achieving the above object, the utility model is taked following technical scheme: the utility model comprises emission-control equipment, and described emission-control equipment comprises spray absorber, No. two spray absorbers and blower fan; Be provided with the tower circulation pipe No. one between the body of the tower bottom of a spray absorber and the shower on top, be provided with a tower circulating pump and a tower heat exchanger in the tower circulation pipe, be provided with the tower circulation pipe No. two between the body of the tower bottom of No. two spray absorbers and the shower on top, be provided with No. two tower circulating pumps and No. two tower heat exchangers in No. two tower circulation pipes, native system also comprises neutralising arrangement, saline solution enrichment facility and control device; Described emission-control equipment also comprises the aerosol separator; Described neutralising arrangement comprises neutralization chamber, is provided with electric blender in the groove; Described saline solution enrichment facility comprises heater, evaporimeter, crystallizer and centrifuge; The water inlet pipe of a spray absorber of described emission-control equipment is connected with outside water main, described water inlet pipe is provided with water compensating valve, and the body of the tower bottom of a spray absorber is provided with a tower liquid level gauge that detects liquid level in the tower and a tower densimeter that detects absorption liquid concentration; The alkali lye inlet pipe of described No. two spray absorbers is connected for pipe with the alkali lye of outside, and the alkali lye inlet pipe is provided with mends the alkali valve; The body of the tower bottom of No. two spray absorbers is provided with No. two tower liquid level gauges and No. two tower pH meters; The leakage fluid dram of described aerosol separator is connected with the fluid infusion mouth of No. two spray absorbers by pipe, and the exhaust outlet of described aerosol separator is connected with described blower fan by pipe; The air inlet pipe of a described spray absorber is provided with pneumatic operated valve, and waste gas is discharged through blower fan by spray absorber, No. two spray absorbers and aerosol separator; The neutralization chamber of described neutralising arrangement is accepted from the acid absorption liquid of a spray absorber and the alkaline absorption solution of No. two spray absorbers by acid solution carrier pipe, alkali lye carrier pipe respectively, the acid solution carrier pipe is provided with the acid solution transfer valve, and the alkali lye carrier pipe is provided with the alkali lye transfer valve; Described neutralization chamber is provided with neutralization chamber liquid level gauge and neutralization chamber pH meter; The steam inlet pipe of the heater of described saline solution enrichment facility is provided with steam supply valve, be connected by rare saline solution carrier pipe between the inlet of heater and the liquid outlet of neutralization chamber, on rare saline solution carrier pipe, be provided with rare saline solution transfer valve, rare saline solution delivery pump, rare saline solution feed flow meter and flow control valve, the exhaust outlet of heater is connected with the air inlet of described evaporimeter by appendix, the discharging opening of evaporimeter is connected with the charging aperture of crystallizer, the discharge gate of crystallizer is connected with the saline solution circulating pump by a saline solution circulation pipe, the saline solution circulating pump is connected with centrifuge by dense saline solution carrier pipe, on dense saline solution carrier pipe, be provided with dense saline solution transfer valve, described saline solution circulating pump is connected with heater by No. two saline solution circulation pipes, the circulation woven hose is provided with the saline solution circulating valve, saline solution is at crystallizer, circulation is and progressively concentrated between heater and the evaporimeter, and crystallizer is provided with the crystallizer densimeter that detects saline solution concentration in the crystallizer.
Described acid solution transfer valve, alkali lye transfer valve, rare saline solution transfer valve, flow control valve, saline solution circulating valve, dense saline solution transfer valve, water compensating valve, benefit alkali valve all are motor-driven valves.
The utlity model has following good effect: the utlity model has emission-control equipment, neutralising arrangement and saline solution enrichment facility, No. one spray absorber uses neutral water as absorption liquid, No. two the absorption tower uses alkali lye as absorption liquid, the useless absorption liquid of a spray absorber discharge is acid, the useless absorption liquid of No. two spray absorber discharges is an alkalescence, two kinds of absorption liquids generation salt of putting together is so reclaim the Nacl product in the waste liquid that can produce from waste gas treatment process.Owing to from waste liquid, reclaim product, thereby improve the added value of native system.The utility model adopts computer control, and simple to operate, control accurately, automated procedures are high.
Description of drawings
For the easier quilt of content of the present utility model is clearly understood, according to specific embodiment also in conjunction with the accompanying drawings, the utility model is described in further detail below, wherein Fig. 1 is the exhaust treatment system diagrammatic sketch that the utility model proposes; Fig. 2 is a control method block diagram of the present utility model.
The specific embodiment
Embodiment 1 sees Fig. 1, and the computer-controlled exhaust treatment system that the utility model proposes comprises emission-control equipment, neutralising arrangement, saline solution enrichment facility and control device.
Described emission-control equipment comprises spray absorber 1, No. two spray absorbers 2, aerosol separator 3 and blower fans 4.The air inlet pipe 10 of a described spray absorber 1 is provided with pneumatic operated valve 18, be connected by pipeline 19 between the air inlet of the exhaust outlet of a spray absorber 1 and No. two spray absorbers 2, be connected by pipeline 29 between the air inlet of the exhaust outlet of No. two spray absorbers 2 and described aerosol separator 3, the exhaust outlet of described aerosol separator 3 is connected with described blower fan 4 by pipeline 32; Waste gas is discharged through blower fan 4 by spray absorber 1, No. two spray absorbers 2 and aerosol separator 3.
Be provided with tower circulation pipe 11 No. one between the body of the tower bottom of a described spray absorber 1 and the shower on top, be connected with a tower circulating pump 12 and a tower heat exchanger 13 in the tower circulation pipe 11, the water inlet pipe 14 of a spray absorber 1 is connected with outside water main, the body of the tower bottom that described water inlet pipe 14 is provided with 15, numbers spray absorbers 1 of water compensating valve is provided with a tower liquid level gauge 16 that detects liquid level in the tower and a tower densimeter 17 that detects absorption liquid concentration.
Be provided with tower circulation pipe 21 No. two between the body of the tower bottom of described No. two spray absorbers 2 and the shower on top, be connected with No. two tower circulating pumps 22 and No. two tower heat exchangers 23 in No. two tower circulation pipes 21, the alkali lye inlet pipe 24 of described No. two spray absorbers 2 is connected for pipe with the alkali lye of outside, and alkali lye inlet pipe 24 is provided with mends alkali valve 25; The body of the tower bottom of No. two spray absorbers 2 is provided with No. two tower liquid level gauges 26 and No. two tower PH meters 27.
The leakage fluid dram of described aerosol separator 3 is connected with the fluid infusion mouth of No. two spray absorbers 2 by pipeline 31.
Described neutralising arrangement comprises neutralization chamber 5, be provided with mixer 57 in the neutralization chamber 5, neutralization chamber 5 is connected with the leakage fluid dram of a spray absorber 1, the leakage fluid dram of No. two spray absorbers 2 by acid solution carrier pipe 53, alkali lye carrier pipe 54 respectively, acceptance is from the acid absorption liquid of a spray absorber 1 and the alkaline absorption solution of No. two spray absorbers 1, acid solution carrier pipe 53 is provided with acid solution transfer valve 51, and alkali lye carrier pipe 54 is provided with alkali lye transfer valve 52; Described neutralization chamber 5 is provided with neutralization chamber liquid level gauge 55 and neutralization chamber PH meter 56.
Described saline solution enrichment facility comprises heater 6, evaporimeter 7, crystallizer 8 and centrifuge 9.Be connected by rare saline solution carrier pipe 61 between the inlet of the heater 6 of described saline solution enrichment facility and the liquid outlet of neutralization chamber 5, on rare saline solution carrier pipe 61, be provided with rare saline solution transfer valve 62, rare saline solution delivery pump 63, saline solution feed flow meter 64 and saline solution feed adjustment valve 65, the exhaust outlet of heater 6 is connected with the air inlet of described evaporimeter 7 by appendix 71, the discharging opening of evaporimeter 7 is connected with the charging aperture of crystallizer 8, the discharge gate of crystallizer 8 is connected with saline solution circulating pump 83 by a saline solution circulation pipe 81, saline solution circulating pump 83 is connected with centrifuge 9 by dense saline solution carrier pipe 87, on dense saline solution carrier pipe 87, be provided with dense saline solution transfer valve 86, described saline solution circulating pump 83 is connected with heater 6 by No. two saline solution circulation pipes 84, No. two saline solution circulation pipe 84 is provided with saline solution circulating valve 85, saline solution is at crystallizer 8, circulation is and progressively concentrated between heater 6 and the evaporimeter, and crystallizer 8 is provided with the crystallizer densimeter 82 that detects saline solution concentration in the crystallizer.
Described acid solution transfer valve 51, alkali lye transfer valve 52, rare saline solution transfer valve 62, flow control valve 65, saline solution circulating valve 85, dense saline solution transfer valve 86, water compensating valve 15, benefit alkali valve 25 all are motor-driven valves.
The control method of above-mentioned exhaust treatment system is as follows: control device comprises computer and Programmable Logic Controller PLC, the parameter of input computer comprises the enforcement concentration value and the higher limit of tower upper limit of concentration value, crystallizer concentration, each upper limit value and lower limit value of tower liquid level, No. two tower liquid levels and neutralization chamber liquid level, each upper limit value and lower limit value, the saline solution feed flow of No. two tower pH values and neutralization chamber pH value have four setting values, corresponding four setting values, it is 15 °, 30 °, 60 °, 90 ° (complete opening) four kinds of states that flow control valve 65 is opened.
When system is in original state, all valves are all closed, and respectively have the absorption liquid that is higher than minimum liquid level in a spray absorber 1 and No. two spray absorbers 1.
Program begins, and PLC sends instruction, opens tower circulating pump 12, No. two tower circulating pumps 22, blower fan 4 and pneumatic operated valves 18 successively, system's operation, and waste gas is discharged through blower fan 4 by spray absorber 1, No. two spray absorbers 2 and aerosol separator 3; In running, computer calculates comparison to the numerical value by above-mentioned densimeter, liquid level gauge, pH meter and flowmeter collection, sends instruction by PLC to executive item; When receiving tower densimeter 17 higher limit signals No. one, open 51, numbers spray absorbers 1 of acid solution transfer valve in and tank diameter 5 transfusions; When receiving tower liquid level gauge 16 lower limit signals or receiving the higher limit signal of neutralization chamber liquid level gauge 55, close acid solution transfer valve 51.When receiving tower liquid level gauge 16 lower limit signals No. one, open water compensating valve 15, to spray absorber 1 moisturizing; When receiving tower liquid level gauge 16 higher limit signals No. one, close water compensating valve 15; When receiving tower pH meter 27 higher limit signals No. two, open 52, No. two spray absorbers 2 of alkali lye transfer valve to neutralization chamber 5 transfusions; When the higher limit signal that receives No. two tower liquid level gauge 26 lower limit signals or neutralization chamber pH meter 56, alkali lye transfer valve 52 is closed in instruction.When receiving tower liquid level gauge 26 lower limit signals No. two, open and mend alkali valve 25, mend alkali lye to No. two spray absorbers 2; When receiving limited signal on No. two tower liquid level gauges 26, instruction is closed and is mended alkali valve 25; In neutralization chamber 5 infusion process, surpass the signal of lower limit when receiving neutralization chamber liquid level gauge 55, instruction starts electric mixer 57 runnings of neutralization chamber 5, with in keeping and saline solution turbulence state.
When receiving neutralization chamber liquid level gauge 55 higher limit signals, judge whether the saline solution enrichment facility can be accepted this batch saline solution and handle, as can, then open steam supply valve 66, rare saline solution transfer valve 62 and rare saline solution delivery pump 63, flow control valve 65, neutralization chamber 5 is to the discharge opeing of saline solution enrichment facility; When the changes in flow rate signal that receives rare saline solution feed flow meter 64, adjust flow control valve 65 open degree; When the lower limit signal that receives neutralization chamber liquid level gauge 55, close rare saline solution transfer valve 62, close rare saline solution delivery pump 63, close the electric blender 57 of neutralization chamber, to prevent agitator idle running.Start saline solution circulating valve 85 and saline solution circulating pump 83, saline solution circulates between heater, evaporimeter and crystallizer; Reach the signal of higher limit when receiving crystallizer densimeter 82, open dense saline solution transfer valve 86, close saline solution circulating valve 85 and saline solution circulating pump 83, start centrifuge 9, arrive the centrifuge time that PLC sets, centrifuge 9 cuts out, and discharges product salt; Computer goes round and begins again the numerical value by above-mentioned densimeter, liquid level gauge, pH meter and flowmeter collection is calculated comparison, constantly sends instruction to executive item by PLC; When to computer end of input signal, computer sends the finish command to PLC, and PLC sends END instruction, stops blower fan 4, stops all circulating pumps, closes pneumatic operated valve 18 and closes all motor-driven valves.
Claims (2)
1. a computer-controlled exhaust treatment system comprises emission-control equipment, and described emission-control equipment comprises a spray absorber (1), No. two spray absorbers (2) and blower fan (4); Be provided with a tower circulation pipe (11) between the body of the tower bottom of a spray absorber (1) and the shower on top, be provided with a tower circulating pump (12) and a tower heat exchanger (13) in the tower circulation pipe (11), be provided with No. two tower circulation pipes (21) between the body of the tower bottom of No. two spray absorbers (2) and the shower on top, be provided with No. two tower circulating pumps (22) and No. two tower heat exchangers (23) in No. two tower circulation pipes (21), it is characterized in that: native system also comprises neutralising arrangement, saline solution enrichment facility and control device; Described emission-control equipment also comprises aerosol separator (3); Described neutralising arrangement comprises neutralization chamber (5), is provided with electric blender (57) in the groove; Described saline solution enrichment facility comprises heater (6), evaporimeter (7), crystallizer (8) and centrifuge (9);
The water inlet pipe (14) of a spray absorber (1) of described emission-control equipment is connected with outside water main, described water inlet pipe (14) is provided with water compensating valve (15), and the body of the tower bottom of a spray absorber (1) is provided with a tower liquid level gauge (16) that detects liquid level in the tower and a tower densimeter (17) that detects absorption liquid concentration; The alkali lye inlet pipe (24) of described No. two spray absorbers (2) is connected for pipe with the alkali lye of outside, and alkali lye inlet pipe (24) is provided with mends alkali valve (25); The body of the tower bottom of No. two spray absorbers (2) is provided with No. two tower liquid level gauges (26) and No. two tower pH meters (27); The leakage fluid dram of described aerosol separator (3) is connected with the fluid infusion mouth of No. two spray absorbers (2) by pipe (31), and the exhaust outlet of described aerosol separator (3) is connected with described blower fan (4) by pipe (32);
The air inlet pipe (10) of a described spray absorber (1) is provided with pneumatic operated valve (18), and waste gas is discharged through blower fan (4) by a spray absorber (1), No. two spray absorbers (2) and aerosol separator (3);
The neutralization chamber of described neutralising arrangement (5) is accepted from the acid absorption liquid of a spray absorber (1) and the alkaline absorption solution of No. two spray absorbers (1) by acid solution carrier pipe (53), alkali lye carrier pipe (54) respectively, acid solution carrier pipe (53) is provided with acid solution transfer valve (51), and alkali lye carrier pipe (54) is provided with alkali lye transfer valve (52); Described neutralization chamber (5) is provided with neutralization chamber liquid level gauge (55) and neutralization chamber pH meter (56);
The steam inlet pipe of the heater of described saline solution enrichment facility (6) is provided with steam supply valve (66), be connected by rare saline solution carrier pipe (61) between the inlet of heater (6) and the liquid outlet of neutralization chamber (5), on rare saline solution carrier pipe (61), be provided with rare saline solution transfer valve (62), rare saline solution delivery pump (63), rare saline solution feed flow meter (64) and flow control valve (65), the exhaust outlet of heater (6) is connected with the air inlet of described evaporimeter (7) by appendix (71), the discharging opening of evaporimeter (7) is connected with the charging aperture of crystallizer (8), the discharge gate of crystallizer (8) is connected with saline solution circulating pump (83) by a saline solution circulation pipe (81), saline solution circulating pump (83) is connected with centrifuge (9) by dense saline solution carrier pipe (87), on dense saline solution carrier pipe (87), be provided with dense saline solution transfer valve (86), described saline solution circulating pump (83) is connected with heater (6) by No. two saline solution circulation pipes (84), circulation woven hose (84) is provided with saline solution circulating valve (85), saline solution is in crystallizer (8), circulation is and progressively concentrated between heater (6) and the evaporimeter, and crystallizer (8) is provided with the crystallizer densimeter (82) that detects saline solution concentration in the crystallizer;
Computer calculates comparison to the numerical value by above-mentioned densimeter, liquid level gauge, pH meter and flowmeter collection, sends instruction by PLC to executive item, the action of PLC control executive item.
2. a kind of computer-controlled exhaust treatment system according to claim 1 is characterized in that: described acid solution transfer valve (51), alkali lye transfer valve (52), rare saline solution transfer valve (62), flow control valve (65), saline solution circulating valve (85), dense saline solution transfer valve (86), water compensating valve (15), benefit alkali valve (25) all are motor-driven valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020255054XU CN201776074U (en) | 2010-07-12 | 2010-07-12 | Waste gas treatment system controlled by computer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201020255054XU CN201776074U (en) | 2010-07-12 | 2010-07-12 | Waste gas treatment system controlled by computer |
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| CN201776074U true CN201776074U (en) | 2011-03-30 |
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| CN201020255054XU Expired - Fee Related CN201776074U (en) | 2010-07-12 | 2010-07-12 | Waste gas treatment system controlled by computer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105327600A (en) * | 2014-08-08 | 2016-02-17 | 新特能源股份有限公司 | Treating apparatus for chlorosilane-containing tail gas produced in polysilicon production process |
-
2010
- 2010-07-12 CN CN201020255054XU patent/CN201776074U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105327600A (en) * | 2014-08-08 | 2016-02-17 | 新特能源股份有限公司 | Treating apparatus for chlorosilane-containing tail gas produced in polysilicon production process |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110330 Termination date: 20140712 |
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| EXPY | Termination of patent right or utility model |