CN103342435A - Comprehensive utilization device of acetylene purification waste sodium hypochlorite - Google Patents
Comprehensive utilization device of acetylene purification waste sodium hypochlorite Download PDFInfo
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- CN103342435A CN103342435A CN2013103246140A CN201310324614A CN103342435A CN 103342435 A CN103342435 A CN 103342435A CN 2013103246140 A CN2013103246140 A CN 2013103246140A CN 201310324614 A CN201310324614 A CN 201310324614A CN 103342435 A CN103342435 A CN 103342435A
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Abstract
The invention provides a comprehensive utilization device of acetylene purification waste sodium hypochlorite. The device comprises an alkali liquid head tank, a waste sodium hypochlorite buffer tank, a waste sodium hypochlorite conveying pump, a preheater, a degassing tower, a 1# acetylene cooler, a vacuum pump, a 2# acetylene cooler, a waste sodium hypochlorite collection pool, a cooling pump, a cooling tower and a waste sodium hypochlorite reuse pump. The device provided by the invention has the advantages of reliable technology, complete safety design and advanced technology, is simple to operate and maintain and can effectively recover acetylene gas in the waste sodium hypochlorite for production; the waste sodium hypochlorite after treatment is safely reused for compounding a sodium hypochlorite solution. The problem of loss of dissolved acetylene is solved, the waste sodium hypochlorite can be reused, the produced waste sodium hypochlorite and water consumption are reduced, the production cost is saved, the environmental pollution is reduced, and the safety, environmental protection and economical benefits are very obvious.
Description
Technical field
The present invention relates to handle in a kind of calcium carbide route acetylene production process the useless clorox comprehensive utilization device of device, particularly a kind of acetylene cleaning of clorox waste water, belong to the chemical industry equipment field.
Background technology
In the production of calcium carbide route acetylene, contain H in the thick acetylene gas
2S, PH
3Deng impurity, if do not purify, can have a strong impact on the ordinary production of subsequent handling.Simultaneously because H
2S, PH
3Spontaneous ignition temperature Deng impurity is low, contacts than easy firing with air in case take place to leak, and occurs easily catching fire or explosion hazard.So acetylene gas must be removed H through peace and quiet operation before being sent to subsequent handling
2S, PH
3Deng impurity.
At present, the big multiple enterprises acetylene cleaning of China is to utilize the chlorine bleach liquor with the H in the acetylene
2S, PH
3Changing into acidic substance etc. impurity oxygen removes.But in this process, produced a large amount of clorox waste water (hereinafter to be referred as useless time sodium), this part waste water is because fully contacting with acetylene gas, acetylene content is higher, about 180 ~ 350mg/L, directly go the wastewater treatment meeting to cause the acetylene gas waste, COD content height simultaneously, intractability is big, the loss that causes raw material simultaneously again contaminate environment, produce problem such as potential safety hazard.
Domestic part enterprise will give up and after time sodium is handled a little a certain amount of useless inferior sodium water will be back to acetylene generation water, but be limited to various conditions, the enterprise that can accomplish higher reclamation rate is few, and can cause foreign matter contents such as carbide slag chlorine root and sulphur phosphorus too high after the reuse, accelerate the corrosion of device and the surface skining of device, carbide slag is used for manufacture of cement causes disadvantageous effect.Also having part enterprise will give up in time sodium, acetylene gas blows down and after aeration is handled, be back to the composite of chlorine bleach liquor, but acetylene gas is not effectively collected, and technical maturity is relatively poor, in chlorine bleach liquor's compound process, if poor to the acetylene gas removal effect, the Technology of selecting is unreasonable, the chlorine reaction of remaining acetylene and effusion in the useless time sodium, still there are problems such as big potential safety hazard and environmental protection in accidents such as detonation can occurring, explode or catch fire.
Summary of the invention
In order to address these problems, the invention provides the useless clorox comprehensive utilization device of a kind of acetylene cleaning, the acetylene gas in the useless time sodium of energy efficient recovery is back to production, and useless sodium processing back safe reuse is composite in the chlorine bleach liquor simultaneously.Solve dissolved acetylene loss loss problem thus, time sodium water reuse of giving up can also have been reduced calcium carbide and the water consumption of producing.Concrete technical scheme of the present invention is as follows:
A kind of acetylene cleaning clorox comprehensive utilization device of giving up, comprise alkali liquid high-level groove, useless time sodium surge tank, useless time sodium transferpump, preheater, degassing tower, 1# acetylene water cooler, vacuum pump, 2# acetylene water cooler, useless time sodium collecting tank, cooling pump, cooling tower, useless time sodium reuse pump, wherein useless time entrance of sodium surge tank is accepted the useless time sodium that the acetylene cleaning operation is come by pipeline, the alkali header tank is by another entrance of the useless time sodium surge tank of pipe connection, useless sodium surge tank outlet connects useless time sodium transferpump by pipeline, useless time sodium transferpump connects preheater by pipeline, preheater is by pipe connection degassing tower entrance, the degassing tower top exit connects 1# acetylene water cooler by pipeline, 1# acetylene water cooler connects vacuum pump by pipeline, vacuum pump connects 2# acetylene water cooler by pipeline, and 2# acetylene water cooler connects the acetylene that will reclaim by pipeline and is delivered to the acetylene system; The degassing tower outlet at bottom connects useless time sodium collecting tank by pipeline, useless time sodium collecting tank is by the pipe connection cooling pump, cooling pump is by the pipe connection cooling tower, cooling tower is by the useless time sodium reuse pump of pipe connection, and the useless time sodium after useless time sodium reuse pump will be handled by pipeline is delivered to the composite system of clorox.
The useless time sodium pipeline of described useless clorox comprehensive utilization device is provided with online pH meter, and the acetylene pipeline that reclaims acetylene gas is provided with oxygen on-line detector and Self controlling valve device.
Described preheater can be shell and tube, coil tube type or plate-type heat exchanger, and the heat transferring medium of employing can be low-pressure steam, waste hot steam or spent hot water etc.
Described degassing tower is the negative-pressure vacuum tower, can adopt packing tower, tray column or board-like and filler combination tower.
Described 1# acetylene water cooler and 2# acetylene water cooler can be shell and tube, coil tube type or plate-type heat exchanger, and the cooling fluid of employing is freeze cycle water.
Described useless time sodium collecting tank is concrete structure or other groove jar, and degassing tower waste discharge time sodium pipe outlet is immersed in this below liquid level of pond, forms fluid-tight.
Described cooling tower is spray cooling tower or filling cooling tower.
A kind of method of using the useless clorox of the useless clorox comprehensive utilization device processing of described acetylene cleaning, comprise six steps: useless time sodium pH value is regulated, time sodium preheating of giving up, useless the sodium degassing, the acetylene gas cooling, useless time sodium cooling, aeration, the chlorine bleach liquor is composite.
The embodiment of each step is as follows:
1), useless sodium pH value regulate: the pipe-line transportation of the useless time sodium water that will come from the acetylene cleaning operation by airtight insulation be to useless time sodium surge tank, controls between 7～9 through adding the useless inferior sodium pH value that acid or alkali will give up in time sodium surge tank;
2), useless sodium preheating: be delivered to preheater with the useless time sodium transferpump time sodium that will give up, the heat transferring medium of preheater adopts spent hot water or low-pressure steam, delivers in the degassing tower after the inferior sodium that will give up is preheated to 50 ℃～70 ℃;
3), useless the sodium degassing: vacuum pump is bled from the degassing tower top, make and keep vacuum in the degassing tower, useless time sodium liquid flash distillation, boiling produce a large amount of water vapour in the tower, because the unique design of degassing tower and the disturbance of water vapour, most of solubilised state acetylene constantly discharges from useless time sodium;
4), acetylene gas cooling: the gas that comes out from the degassing tower top is introduced into the condensation of 1# acetylene water cooler and removes wherein most of water vapour, and the acetylene gas that obtains is delivered to after the vacuum pump pressurization and is delivered to the acetylene system after 2# acetylene water cooler is cooled to normal temperature;
5), useless time sodium cooling, aeration: the useless time sodium that comes out from the degassing tower bottom is sent into useless time sodium collecting tank through piping.Useless time sodium is delivered to chlorine bleach liquor's configuration-system with useless time sodium reuse pump delivery in the useless time sodium collecting tank after cooling pump is delivered to cooling tower cooling, aeration;
6), the chlorine bleach liquor is composite: the useless time sodium after the processing adopts the composite mode of mixed once carrying out the chlorine bleach liquor when composite, with a certain amount of concentration be that directly to be mixed into concentration be 0.08% ~ 0.12% chlorine bleach liquor for 10% chlorine bleach liquor.
Useless sodium pH value of aforesaid method regulated and can be chosen in useless time sodium and advance preceding other any links of degassing tower and finish.
Can take secondary to mix composite mode when the aforesaid method chlorine bleach liquor is composite, when adopting secondary to mix composite mode, the solvent of mixing solutions is new chlorine bleach liquor and service water for the first time, be mixed into concentration and be lower than 2% chlorine bleach liquor, for the second time the solvent that mixes is the useless time sodium liquid after the concentration of mixing for the first time is lower than 2% chlorine bleach liquor and this device and handles, and is mixed into concentration and is 0.08% ~ 0.12% chlorine bleach liquor.
Apparatus of the present invention technology is reliable, and safe design is perfect, and Operation and Maintenance is simple, advanced technology, and the acetylene gas in the useless time sodium of energy efficient recovery is back to production, and useless time sodium processing back safe reuse is composite in the chlorine bleach liquor.Solved dissolved acetylene loss loss problem thus, time sodium water reuse of giving up can also have been reduced calcium carbide and the water consumption of producing, when saving production cost, also reduced the pollution of environment, safety, environmental protection, economic benefit are very obvious.
Description of drawings
Fig. 1 is the structural representation of the useless clorox comprehensive utilization device of this acetylene cleaning.
Mark among the figure: 1-alkali liquid high-level groove, the useless time sodium surge tank of 2-, the useless time sodium transferpump of 3-, 4-preheater, the 5-degassing tower, 6-1# acetylene water cooler, 7-vacuum pump, 8-2# acetylene water cooler, the useless time sodium collecting tank of 9-, 10-cooling pump, 11-cooling tower, the useless time sodium reuse pump of 12-.
Embodiment
As shown in Figure 1, the acetylene cleaning of the present invention clorox comprehensive utilization device of giving up, comprise alkali liquid high-level groove 1, useless time sodium surge tank 2, useless time sodium transferpump 3, preheater 4, degassing tower 5,1# acetylene water cooler 6, vacuum pump 7,2# acetylene water cooler 8, useless time sodium collecting tank 9, cooling pump 10, cooling tower 11, useless time sodium reuse pump 12, wherein useless time 2 one entrances of sodium surge tank are accepted the useless time sodium that the acetylene cleaning operation is come by pipeline, alkali header tank 1 is by another entrance of the useless time sodium surge tank 2 of pipe connection, useless time sodium surge tank 2 outlets connect useless time sodium transferpump 3 by pipeline, useless time sodium transferpump 3 connects preheater 4 by pipeline, preheater 4 is by pipe connection degassing tower 5 entrances, degassing tower 5 top exits connect 1# acetylene water cooler 6 by pipeline, 1# acetylene water cooler 6 connects vacuum pump 7 by pipeline, vacuum pump 7 connects 2# acetylene water cooler 8 by pipeline, and 2# acetylene water cooler 8 connects the acetylene that will reclaim by pipeline and is delivered to the acetylene system; Degassing tower 5 outlet at bottoms connect useless time sodium collecting tank 9 by pipeline, useless time sodium collecting tank 9 is by pipe connection cooling pump 10, cooling pump 10 is by pipe connection cooling tower 11, cooling tower 11 is by the useless time sodium reuse pump 12 of pipe connection, and the useless time sodium after useless time sodium reuse pump 12 will be handled by pipeline is delivered to the composite system of clorox.
The useless time sodium pipeline of this device is provided with online pH meter, the useless time sodium pH value of monitoring in real time.The acetylene pipeline that reclaims acetylene gas is provided with oxygen on-line detector and Self controlling valve device, the content of oxygen in the online detection acetylene gas, when oxygen content in the acetylene gas exceeded standard (＞1%), the interlocking system of stopping in emergency started, and realized emergency.Stop simultaneously, this device Nitrogen filling system Self controlling valve is opened, and timely additional nitrogen, supplementary pressure are during to normal value, and the emptying internally piloted valve is opened, the safe emptying of malleation, displacement.
Below time sodium is handled and the specific embodiment of comprehensive utilization in order to use this device to give up.
The pipe-line transportation of the useless time sodium water that will come from the acetylene cleaning operation by airtight insulation is to useless inferior sodium surge tank 2, according to useless time sodium water pH value situation, add 32% caustic soda from alkali liquid high-level groove 1 toward useless time sodium surge tank, the useless time sodium pH value of control is between 7～9, be delivered to preheater 4 with useless sodium transferpump 3 time sodium that will give up then, after being preheated to 50 ℃～70 ℃, useless time sodium sends in the degassing tower 5 from pipeline, utilize vacuum pump 7 to bleed from degassing tower 5 tops, make degassing tower 5 keep certain vacuum, useless time sodium flash distillation in degassing tower 5, boiling produces a large amount of water vapour, and most of solubilised state acetylene constantly discharges from useless time sodium.
The gas that comes out from degassing tower 5 tops is introduced into 6 condensations of 1# acetylene water cooler and removes wherein most of water vapour, and the acetylene gas that obtains is delivered to after vacuum pump 7 pressurizations and is delivered to the acetylene system after 2# acetylene water cooler 8 is cooled to normal temperature.
The useless time sodium that comes out from degassing tower 5 bottoms is sent into useless time sodium collecting tank 9 through piping, be transported to cooling tower 11 coolings, aeration with will give up time sodium of cooling pump 10 then, sour gas such as remaining acetylene gas and sulphur phosphorus are fully removed, again with useless sodium reuse pump 12 will lower the temperature, useless time sodium behind the aeration is delivered to chlorine bleach liquor's configuration-system, carries out the composite of chlorine bleach liquor safely.The composite mode that composite employing secondary mixes, be 10% new chlorine bleach liquor with concentration with being mixed with concentration after service water mixes be 1.5% chlorine bleach liquor, again with handle after useless time sodium mix, obtain concentration and be 0.08% ~ 0.12% chlorine bleach liquor, use for acetylene cleaning.
Claims (10)
1. the useless clorox comprehensive utilization device of an acetylene cleaning, comprise alkali liquid high-level groove (1), useless time sodium surge tank (2), useless time sodium transferpump (3), preheater (4), degassing tower (5), 1# acetylene water cooler (6), vacuum pump (7), 2# acetylene water cooler (8), useless time sodium collecting tank (9), cooling pump (10), cooling tower (11), useless time sodium reuse pump (12), it is characterized in that: useless time (2) entrances of sodium surge tank are accepted the useless time sodium that the acetylene cleaning operation is come by pipeline, alkali header tank (1) is by another entrance of the useless time sodium surge tank (2) of pipe connection, useless sodium surge tank (2) outlet connects useless time sodium transferpump (3) by pipeline, useless time sodium transferpump (3) connects preheater (4) by pipeline, preheater (4) is by pipe connection degassing tower (5) entrance, degassing tower (5) top exit connects 1# acetylene water cooler (6) by pipeline, 1# acetylene water cooler (6) connects vacuum pump (7) by pipeline, vacuum pump (7) connects 2# acetylene water cooler (8) by pipeline, and 2# acetylene water cooler (8) connects the acetylene that will reclaim by pipeline and is delivered to the acetylene system; Degassing tower (5) outlet at bottom connects useless time sodium collecting tank (9) by pipeline, useless time sodium collecting tank (9) is by pipe connection cooling pump (10), cooling pump (10) is by pipe connection cooling tower (11), cooling tower (11) is by the useless time sodium reuse pump (12) of pipe connection, and the useless time sodium after useless time sodium reuse pump (12) will be handled by pipeline is delivered to the composite system of clorox.
2. useless clorox comprehensive utilization device according to claim 1 is characterized in that useless time sodium pipeline is provided with online pH meter, and the acetylene pipeline that reclaims acetylene gas is provided with oxygen on-line detector and Self controlling valve device.
3. useless clorox comprehensive utilization device according to claim 1 is characterized in that described preheater (4) is shell and tube or coil tube type or plate-type heat exchanger, and the heat transferring medium of employing is low-pressure steam or waste hot steam or spent hot water.
4. useless clorox comprehensive utilization device according to claim 1 is characterized in that described degassing tower (5) is the negative-pressure vacuum tower, adopts packing tower or tray column or form board-like and the filler combination tower.
5. useless clorox comprehensive utilization device according to claim 1 is characterized in that described 1# acetylene water cooler (6) and 2# acetylene water cooler (8) are shell and tube or coil tube type or plate-type heat exchanger, and the cooling fluid of employing is freeze cycle water.
6. useless clorox comprehensive utilization device according to claim 1 is characterized in that described cooling tower (11) is spray cooling tower or filling cooling tower.
7. an application rights requires 1 described useless clorox comprehensive utilization device to handle the method for useless clorox, and it is characterized in that comprising six steps: useless time sodium pH value is regulated, useless time sodium preheating, useless the sodium degassing, the acetylene gas cooling, useless time sodium cooling, aeration, the chlorine bleach liquor is composite.
8. method according to claim 7 is characterized in that:
Described useless sodium pH value regulating step comprises: the pipe-line transportation of the useless time sodium water that will come from the acetylene cleaning operation by airtight insulation be to useless time sodium surge tank (2), controls between 7～9 through adding the inferior sodium pH value of giving up that acid or alkali will give up in time sodium surge tank (2);
Described useless sodium pre-heating step comprises: be delivered to preheater (4) with useless time sodium transferpump (3) time sodium that will give up, the heat transferring medium of preheater (4) adopts spent hot water or low-pressure steam, delivers in the degassing tower (5) after the inferior sodium that will give up is preheated to 50 ℃～70 ℃;
Described useless sodium degassing step comprises: vacuum pump (7) is bled from degassing tower (5) top, make and keep vacuum in the degassing tower (5), useless time sodium liquid flash distillation, boiling produce a large amount of water vapour in the tower, because the unique design of degassing tower (5) and the disturbance of water vapour, most of solubilised state acetylene constantly discharges from useless time sodium;
Described acetylene cooling step comprises: the gas that comes out from degassing tower (5) top is introduced into 1# acetylene water cooler (6) condensation and removes wherein most of water vapour, and the acetylene gas that obtains is delivered to after vacuum pump (7) pressurization and is delivered to the acetylene system after 2# acetylene water cooler (8) is cooled to normal temperature;
Described useless time sodium cooling, aerating step comprise: the useless time sodium that comes out from degassing tower (5) bottom is sent into useless time sodium collecting tank (9) through piping, useless time sodium is delivered to chlorine bleach liquor's configuration-system with useless time sodium reuse pump (12) in the useless time sodium collecting tank (9) after cooling pump (10) is delivered to cooling tower (11) cooling, aeration;
The composite step of described chlorine bleach liquor comprises: useless sodium after the processing is carrying out the chlorine bleach liquor when composite, adopt the composite mode of mixed once, with a certain amount of concentration be that directly to be mixed into concentration be 0.08% ~ 0.12% chlorine bleach liquor for 10% chlorine bleach liquor.
9. method according to claim 7 is characterized in that described useless time sodium pH value regulating step is chosen in useless inferior sodium and advances preceding other any links of degassing tower (5) and finish.
10. method according to claim 7, it is characterized in that the composite step of described chlorine bleach liquor takes secondary to mix composite mode, when adopting secondary to mix composite mode, the solvent of mixing solutions is new chlorine bleach liquor and service water for the first time, be mixed into concentration and be lower than 2% chlorine bleach liquor, for the second time the solvent that mixes is the useless time sodium liquid after the concentration of mixing for the first time is lower than 2% chlorine bleach liquor and this device and handles, and is mixed into concentration and is 0.08% ~ 0.12% chlorine bleach liquor.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104743625A (en) * | 2014-10-17 | 2015-07-01 | 济宁金威煤电有限公司 | Acetylene waste sodium recycling device and technological method as well as DCS control method |
| CN105126577A (en) * | 2015-07-31 | 2015-12-09 | 广西德陆科技有限公司 | Acetylene gas purifying device for purifying acetylene and desorbing waste sodium hypochlorite |
| CN105268207A (en) * | 2014-11-27 | 2016-01-27 | 青岛科技大学 | Technology and device for acetylene desorption and complex formulation of waste sodium hypochlorite solution |
| CN111003818A (en) * | 2019-12-16 | 2020-04-14 | 内蒙古蒙维科技有限公司 | Device and method for preventing waste sodium hypochlorite heater from scaling |
| CN112299943A (en) * | 2020-11-23 | 2021-02-02 | 安徽皖维高新材料股份有限公司 | Acetylene cleaning device and method in vinyl acetate production process |
| CN113402068A (en) * | 2021-07-01 | 2021-09-17 | 宁夏金昱元高新材料有限公司 | Method for recycling acetylene purification waste sodium hypochlorite |
| CN115849478A (en) * | 2022-10-28 | 2023-03-28 | 安徽华塑股份有限公司 | Ammonia nitrogen treatment process in water of acetylene purification system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104743625A (en) * | 2014-10-17 | 2015-07-01 | 济宁金威煤电有限公司 | Acetylene waste sodium recycling device and technological method as well as DCS control method |
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| CN112299943A (en) * | 2020-11-23 | 2021-02-02 | 安徽皖维高新材料股份有限公司 | Acetylene cleaning device and method in vinyl acetate production process |
| CN112299943B (en) * | 2020-11-23 | 2023-07-07 | 安徽皖维高新材料股份有限公司 | Acetylene cleaning device and method in vinyl acetate production process |
| CN113402068A (en) * | 2021-07-01 | 2021-09-17 | 宁夏金昱元高新材料有限公司 | Method for recycling acetylene purification waste sodium hypochlorite |
| CN115849478A (en) * | 2022-10-28 | 2023-03-28 | 安徽华塑股份有限公司 | Ammonia nitrogen treatment process in water of acetylene purification system |
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Application publication date: 20131009 |