CN111111384B - Hydrochloric acid regeneration exhaust system - Google Patents
Hydrochloric acid regeneration exhaust system Download PDFInfo
- Publication number
- CN111111384B CN111111384B CN201911098727.7A CN201911098727A CN111111384B CN 111111384 B CN111111384 B CN 111111384B CN 201911098727 A CN201911098727 A CN 201911098727A CN 111111384 B CN111111384 B CN 111111384B
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- tank
- communicated
- storage tank
- neutralization
- hydrochloric acid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
- B01D2257/204—Inorganic halogen compounds
- B01D2257/2045—Hydrochloric acid
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention provides a hydrochloric acid regeneration exhaust system, which comprises an acid storage tank, a first water seal tank, a heat exchanger, a leaching tower, a temporary storage tank, a first neutralization tank and an ammonia storage tank, wherein the top of the acid storage tank is mutually communicated with the first water seal tank through a pipeline by adopting positive water seal; the invention has simple structure, avoids tail gas mixing, meets the requirement of air composite emission around equipment, has good safety and environmental protection, and has good application prospect.
Description
Technical Field
The invention relates to the technical field of metal processing auxiliary equipment, in particular to a hydrochloric acid regeneration exhaust system.
Background
At present, a conventional cold rolling hydrochloric acid regeneration system is generally divided into two parts, wherein the first part is desiliconized by adopting a chemical method, and the second part is subjected to thermal decomposition of hydrochloric acid waste liquid by using a spray roasting method, so that hydrochloric acid and ferric oxide powder are regenerated.
However, the system has a certain safety risk in practical application, because the system has a plurality of devices which need to exhaust gas, and in order to ensure that the exhaust gas meets the emission requirement, the exhaust gas needs to be uniformly washed and discharged, the existing system shares one set of washing and discharging devices, which causes the possibility that the gases generated in different treatment steps flow into each other, hydrogen is generated in the process of reaction acid rolling, and if the gases flow into each other, the potential safety hazard is easily generated, and the detonation accident is caused.
Disclosure of Invention
In view of this, the invention provides a hydrochloric acid regeneration exhaust system which has a simple overall structure, can avoid the channeling of gas discharged by different devices, and enables the gas discharge to be more reliable and safer.
The technical scheme of the invention is realized as follows: the invention provides a hydrochloric acid regeneration exhaust system which comprises an acid storage tank, a first water-sealed tank, a heat exchanger, a leaching tower, a temporary storage tank, a first neutralization tank, an ammonia storage tank and a first breather valve, wherein the top of the acid storage tank is communicated with the first water-sealed tank through a pipeline by adopting positive water seal, the liquid outlet of the acid storage tank is communicated with the liquid inlet of the leaching tower through the heat exchanger, the liquid outlet of the leaching tower is communicated with the temporary storage tank, the temporary storage tank is communicated with the first neutralization tank, the liquid outlet of the ammonia storage tank is communicated with the liquid inlet of the first neutralization tank, and the top of the acid storage tank is communicated with the outside through the first breather valve.
On the basis of the technical scheme, the sewage treatment system preferably further comprises a first sewage tank, and the first water-sealed tank is communicated with the first sewage tank.
On the basis of the technical scheme, the leaching tower preferably further comprises a washing tower, and the air outlet of the leaching tower is communicated with the waste gas inlet of the washing tower through a pipeline.
On the basis of the technical scheme, the smoke generating device preferably further comprises a smoke tube, wherein the air outlet pipe of the first neutralizing tank is communicated with the smoke tube, and the smoke tube is communicated with the atmosphere.
On the basis of the technical scheme, preferably, still include the second jar of neutralizing, the liquid outlet of first jar of neutralizing communicates with each other with the inlet of second jar of neutralizing, the jar of temporarily storing communicates with each other with the second jar of neutralizing, and the liquid outlet of ammonia storage tank communicates with each other with the inlet of second jar of neutralizing, and the second jar of neutralizing communicates with each other with the chimney.
On the basis of the technical scheme, the air-conditioning system is preferable and internally provided with a fan, wherein the fan is communicated and arranged on the air outlet pipe of the first neutralizing tank and the air outlet pipe of the second neutralizing tank.
Still further preferably, the device further comprises a second breather valve, and the top of the ammonia storage tank is communicated with the atmosphere through the second breather valve.
On the basis of the technical scheme, the ammonia storage tank is preferable to be further provided with a second water seal tank, and the top of the ammonia storage tank is communicated with the inside of the second water seal tank through a pipeline.
On the basis of the technical scheme, the sewage treatment system preferably further comprises a second sewage tank, and the top end of the side surface and the bottom end of the side surface of the second water-sealed tank are communicated with the second sewage tank through pipelines.
Compared with the prior art, the hydrochloric acid regeneration exhaust system has the following beneficial effects:
(1) the hydrochloric acid regeneration exhaust system is simple in overall structure, residual gas around the acid tank is effectively removed by arranging the first water-sealed tank and the first breather valve, meanwhile, the tail gas can be cooled, residual gas around the ammonia storage tank is effectively removed by the second water-sealed tank and the second breather valve, the tail gas can also be cooled, the better tail gas treatment effect is realized overall, the safety is high, and the pollution caused by tail gas mixing is avoided;
(2) the design of chimney and fan lets the gas in the neutralization jar in time get rid of, and is safer in the neutralization jar, need not simultaneously with the gas in the neutralization jar and all the other treatment facility's tail gas mixture, the security is higher, avoids the condition of scurrying the gas to take place.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of the connection of the hydrochloric acid regeneration exhaust system according to the present invention.
In the figure: 1-acid storage tank, 2-first water-sealed tank, 3-heat exchanger, 4-leaching tower, 5-temporary storage tank, 6-first neutralization tank, 7-ammonia storage tank, 8-first breather valve, 9-first sewage tank, 10-washing tower, 11-chimney, 12-second neutralization tank, 13-fan, 14-second breather valve, 15-second water-sealed tank and 16-second sewage tank.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1, the hydrochloric acid regeneration exhaust system of the present invention includes: sour storage tank 1, first water seal jar 2, heat exchanger 3, leaching tower 4, the jar 5 of keeping in, first neutralization jar 6, ammonia storage tank 7 and first breather valve 8, the pipeline is passed through at the top of sour storage tank 1 and the first water seal jar 2 adopts positive water seal to communicate with each other, the liquid outlet of sour storage tank 1 communicates with each other through heat exchanger 3 and the inlet of leaching tower 4, the liquid outlet of leaching tower 4 communicates with jar 5 of keeping in each other, jar 5 and the first neutralization jar 6 of keeping in communicate with each other, the liquid outlet of ammonia storage tank 7 communicates with each other with the first inlet of neutralization jar 6, the top of sour storage tank 1 communicates with each other through first breather valve 8 and external world.
In the above embodiment, adopt first breather valve 8 to connect acid storage tank 1 and atmosphere, thereby make the acid mist in acid storage tank 1 isolated with the atmosphere in certain pressure range, can communicate with each other with the atmosphere when exceeding or being less than this pressure range again, can reduce the medium to a certain extent and volatilize, maintain the atmospheric pressure balance in the acid storage tank 1, most acid mist gas then gets into first water sealed tank 2 in acid storage tank 1, discharge after first water sealed tank 2 absorbs, the pressure balance in acid storage tank 1 can be maintained to first water sealed tank 2 on the one hand, on the other hand can absorb acid mist gas, avoid discharging not up to standard.
In the specific embodiment, the sewage treatment system further comprises a first sewage tank 9, and the first water-sealed tank 2 is communicated with the first sewage tank 9.
In the above embodiment, the first wastewater tank 9 is used for receiving wastewater in the first water-sealed tank 2, so as to facilitate centralized treatment and discharge.
Through above-mentioned embodiment can let the compound environmental protection requirement of the air around the sour storage tank 1, discharge gas can not mix with the discharge gas of other storage tanks simultaneously, has reduced the safety risk.
The following table shows the measured data for the air surrounding the acid storage tank 1:
the above data shows that the quality of the air surrounding the acid storage tank 1 is acceptable for emissions.
In the specific embodiment, the device further comprises a washing tower 10, and the air outlet of the leaching tower 4 is communicated with the waste gas inlet of the washing tower 10 through a pipeline.
The washing tower 10 can wash the waste gas discharged from the leaching tower 4, and the waste gas is discharged after the washing is finished, so that the pollution can be reduced.
In the specific embodiment, the smoke tube 11 is further included, the air outlet pipe of the first neutralization tank 6 is communicated with the smoke tube 11, and the smoke tube 11 is communicated with the atmosphere.
In the above embodiment, since corrosive gas and dangerous gas are easily generated and gathered in the first neutralizing tank 6, which is not beneficial to the neutralization reaction, and even can generate danger, the gas in the first neutralizing tank 6 needs to be evacuated in time, and the conventional treatment system is dangerous to treat and discharge together with the waste gas of other storage tanks, the scheme adopts the flue pipe 11 to discharge, and the flue pipe 11 can utilize the external gas flow to form the venturi effect, so as to extract the gas in the first neutralizing tank 6, thereby achieving the exhaust purpose.
After the treatment of the above embodiment, the gas index in the first neutralization tank 6 is obviously improved, and the specific detection data are as follows:
the above data show that the gas content in the first neutralization tank 6 is satisfactory, safe and reliable.
In the concrete embodiment, the device also comprises a second neutralization tank 12, wherein the liquid outlet of the first neutralization tank 6 is communicated with the liquid inlet of the second neutralization tank 12, the temporary storage tank 5 is communicated with the second neutralization tank 12, the liquid outlet of the ammonia storage tank 7 is communicated with the liquid inlet of the second neutralization tank 12, and the second neutralization tank 12 is communicated with the chimney 11.
In the above embodiment, two neutralization tanks are arranged in series, so that further mixing and neutralization of the acid liquor and the ammonia gas can be realized, and the content of free hydrogen chloride in the acid liquor can be reduced.
In a specific embodiment, the device further comprises a fan 13, and the fan 13 is communicated and arranged on the air outlet pipe of the first neutralization tank 6 and the air outlet pipe of the second neutralization tank 12.
In the above embodiment, in order to avoid the shortage of wind power in the atmosphere and the failure of timely removal of the gas in the neutralization tank, the fan 13 is mounted on the gas outlet pipe of the neutralization tank, and the gas in the neutralization tank is extracted by the wind power of the fan 13.
In the specific embodiment, the device further comprises a second breather valve 14, and the top of the ammonia storage tank 7 is communicated with the atmosphere through the second breather valve 14.
Because ammonia, aqueous vapor, nitrogen gas and oxygen easily exist in ammonia storage tank 7, when its direct waste gas with other storage tanks is handled together and is discharged, appear danger easily, so set up second breather valve 14, the gas in ammonia storage tank 7 is isolated with the atmosphere in certain pressure range, when exceeding pressure range, can directly discharge to the atmosphere in, the pressure balance in the ammonia storage tank 7 has been maintained on the one hand, has reduced gaseous the revealing simultaneously, safety ring protects.
In the specific embodiment, a second water-sealed tank 15 is further included, and the top of the ammonia storage tank 7 is communicated with the inside of the second water-sealed tank 15 through a pipeline.
In the above embodiment, in order to make the gas in the ammonia tank 7 be treated more safely, the gas in the ammonia tank 7 is subjected to the water seal treatment by the second water seal tank 15, and the possibility of discharge to the atmosphere is further reduced.
In the specific embodiment, the sewage treatment system further comprises a second sewage tank 16, and the top side end and the bottom side end of the second water-sealed tank 15 are communicated with the second sewage tank 16 through pipelines.
In the above embodiment, the wastewater and the waste gas in the second water-sealed tank 15 can enter the second sewage tank 16 again for unified treatment, so that the safety is higher and the environment is more friendly.
After the treatment by the method, the air around the ammonia storage tank 7 is detected, and the detection result is as follows:
the detection results show that the content of the ammonia gas in the air around the ammonia storage tank 7 is in accordance with the emission standard.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (4)
1. A hydrochloric acid regeneration exhaust system comprises an acid storage tank (1), a first water seal tank (2), a heat exchanger (3), a leaching tower (4), a temporary storage tank (5), a first neutralization tank (6), an ammonia storage tank (7), a smoke tube (11), a second neutralization tank (12), a fan (13), a second breather valve (14) and a second water seal tank (15), wherein the top of the acid storage tank (1) is communicated with the first water seal tank (2) through a pipeline by adopting positive water seal, the liquid outlet of the acid storage tank (1) is communicated with the liquid inlet of the leaching tower (4) through the heat exchanger (3), the liquid outlet of the leaching tower (4) is communicated with the temporary storage tank (5), the temporary storage tank (5) is communicated with the first neutralization tank (6), the liquid outlet of the ammonia storage tank (7) is communicated with the liquid inlet of the first neutralization tank (6), and the hydrochloric acid regeneration exhaust system is characterized by further comprising a first breather valve (8), the top of the acid storage tank (1) is communicated with the outside through a first breather valve (8), the air outlet pipe of the first neutralizing tank (6) is communicated with the chimney (11), the chimney (11) is communicated with the atmosphere, the liquid outlet of the first neutralizing tank (6) is communicated with the liquid inlet of the second neutralizing tank (12), the temporary storage tank (5) is communicated with a second neutralization tank (12), a liquid outlet of the ammonia storage tank (7) is communicated with a liquid inlet of the second neutralization tank (12), the second neutralization tank (12) is communicated with a chimney (11), the fan (13) is communicated and arranged on the air outlet pipe of the first neutralizing tank (6) and the air outlet pipe of the second neutralizing tank (12), the top of the ammonia storage tank (7) is communicated with the atmosphere through a second breather valve (14), the top of the ammonia storage tank (7) is communicated with the inside of the second water-sealed tank (15) through a pipeline.
2. The hydrochloric acid regeneration exhaust system as defined in claim 1, further comprising a first sump (9), the first water-sealed tank (2) being in communication with the first sump (9).
3. The hydrochloric acid regeneration exhaust system as set forth in claim 1, further comprising a scrubber (10), wherein the outlet of the leaching tower (4) is communicated with the waste gas inlet of the scrubber (10) through a pipeline.
4. The hydrochloric acid regeneration exhaust system as defined in claim 1, further comprising a second sump (16), wherein the second water-sealed tank (15) is interconnected at both top and bottom sides to the second sump (16) by pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911098727.7A CN111111384B (en) | 2019-11-12 | 2019-11-12 | Hydrochloric acid regeneration exhaust system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911098727.7A CN111111384B (en) | 2019-11-12 | 2019-11-12 | Hydrochloric acid regeneration exhaust system |
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| CN111111384A CN111111384A (en) | 2020-05-08 |
| CN111111384B true CN111111384B (en) | 2021-10-08 |
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