CN105293669A - Method for adjusting pH value of alkaline waste water - Google Patents
Method for adjusting pH value of alkaline waste water Download PDFInfo
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- CN105293669A CN105293669A CN201510768530.5A CN201510768530A CN105293669A CN 105293669 A CN105293669 A CN 105293669A CN 201510768530 A CN201510768530 A CN 201510768530A CN 105293669 A CN105293669 A CN 105293669A
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Abstract
The invention relates to a method for adjusting a pH value of alkaline waste water. According to the method, a mixing reaction pot is provided, a tail gas flowmeter is arranged at top of the mixing reaction pot, a circulating pump is arranged at bottom of the mixing reaction pot, CO2-containig acidic tail gas generated during a production process is used as a raw material, the pH value of the alkaline waste water is adjusted, so that the novel pH value adjusting method is explored, acidic gas and the alkaline waste water are fully mixed and reacted by a jet reactor, and pH value adjusting for the alkaline waste water is conveniently realized. The method has the advantages of simple and reasonable process, easy control and less risk, and problems of corrosion and safety due to liquid acid can be avoided, by using tail gas to adjust the pH value, acidic gas discharge is reduced, operation cost is reduced, and environment benefit is obvious.
Description
Technical field
The present invention relates to a kind of pH value control method of alkaline waste water, be particularly applicable to the preprocessing technical field of water treatment field waste water.
Background technology
At present, China is global maximum alkaline production base, end all kinds of alkali output in 2014 and reached forty-two million ton, the problem of the high energy consumption that a large amount of alkaline and the enterprise consuming alkali not only face, and the pH regulator containing alkali waste water produced in production process highlights day by day with the harm bringing environment.
The method of traditional adjust ph adopts fluid sulphuric acid, nitric acid, hydrochloric acid to drip, this mode brings suppression to the microbial reproduction of the sewage disposal in downstream and growth, there is following problem in the control method of existing pH value: one is in the waste water after being regulated by three kinds of acid, sulfate radical can produce hydrogen sulfide in wastewater biochemical reduction process, hydrogen sulfide is highly toxic substance to microorganism, causes sewage to run and is obstructed; Two is that the adjustment of hydrochloric acid adds chlorine root, and chlorine root not only to corrosive pipeline, and has restraining effect higher than the chlorine root of 1000mg/l to microorganism; Three is adopt the waste water of nitric acid treatment, not only will consider the storage safe problem of nitric acid, and nitrate radical enter water body after need to be processed by nitrification and denitrification, bring difficulty to sewage treatment process.
Summary of the invention
For the problems referred to above that prior art exists; the present invention is by utilizing the discarded acid tail gas produced in process of factory production to be raw material; regulate the pH value containing alkali waste water; explore a kind of control method of new pH value, the present invention is easy to control, dangerous little; avoid the burn into security problems of liquid acid; utilize tail gas adjust ph simultaneously, reduced discharging sour gas to a certain extent, protected environment.
The technical solution used in the present invention is: a kind of pH value control method of alkaline waste water, comprises a hybrid reaction tank, and hybrid reaction tank top is provided with a tail gas stream gauge, and hybrid reaction pot bottom is provided with a recycle pump; Abundant hybrid reaction is carried out after sour gas and alkaline waste water being passed into hybrid reaction tank, the unreacted sour gas in final mixing reactor top and rare gas element enter next step operation after the metering of tail gas stream gauge, the waste water of hybrid reaction pot bottom pH value 6-9 out passes through recycle pump, a part enters the backflow of hybrid reaction tank top, and another part enters next process and uses.
The pH value control method of described alkaline waste water, arranges a gas transmission equipment before its hybrid reaction tank, sour gas passes into after the pressurization of gas transmission equipment that alkaline waste water that hybrid reaction tank and hybrid reaction tank top passes into is reverse to be contacted, and carries out acid-base neutralisation reaction.
The pH value control method of described alkaline waste water, its gas transmission equipment is blower fan or compressor.
The pH value control method of described alkaline waste water, waste water tank, jet-pump, jet reactor that before its hybrid reaction tank, setting is connected successively, alkaline waste water is collected in waste water tank, by jet-pump by alkaline waste water positive delivery to the ingress of jet reactor, formed negative pressure sour gas is drawn in jet reactor, sour gas and alkaline waste water are in the inner fully contact reacts of jet reactor, the waste water of the acid gas-containing formed enters in mixing reactor again, reacts further and gas-liquid separation.
The pH value control method of described alkaline waste water, its jet reactor is one with the equipment of trunnion, trunnion leading portion is contraction section, trunnion rear end is expansion segment, contraction section port is provided with water-in, and inner being connected with water-in of contraction section is equipped with shower nozzle, before shower nozzle is arranged on trunnion, contraction section exterior lateral sides is provided with inlet mouth, and expansion segment port is provided with water outlet.In jet reactor due to alkaline waste water at nozzle place by throttling expansion, thus formed negative pressure, sour gas is drawn in jet reactor, with alkaline waste water abundant contact reacts in jet reactor.Jet reactor has bleeding and reacts the dual function of mixing.
The pH value control method of described alkaline waste water, threaded in its shower nozzle, be connected with water-in pipeline by screw thread, the angle of shower nozzle runner and level is 5 °-45 °.
The pH value control method of described alkaline waste water, its sour gas is the multicomponent gas that is a kind of or that mix with arbitrary proportion in carbonic acid gas, hydrogen sulfide, sulfurous gas, hydrogenchloride.
The pH value control method of described alkaline waste water, is equipped with filler in its hybrid reaction tank, is beneficial to enlarge active surface, provides reaction power.
Beneficial effect of the present invention: the present invention by utilize produce in process of factory production containing CO
2be raw material Deng acid tail gas, regulate the pH value containing alkali waste water, explored a kind of control method of new pH value, made sour gas and alkaline waste water hybrid reaction more fully by jet reactor, be more conducive to the pH regulator of alkaline waste water; Present invention process advantages of simple, is easy to control, dangerous little, avoids the burn into security problems of liquid acid, utilizes tail gas adjust ph simultaneously, decrease the discharge of sour gas, and can reduce running cost, obvious environment benefit.
Accompanying drawing explanation
Fig. 1 is the process flow sheet of the embodiment of the present invention 2;
Fig. 2 is the process flow sheet of the embodiment of the present invention 5;
Fig. 3 is jet reactor structure iron;
Fig. 4 is the A-A sectional view of Fig. 3 jet reactor;
Fig. 5 is nozzle arrangements schematic diagram in Fig. 3 jet reactor.
In Fig. 1-5: 1 be gas transmission equipment, 2 be hybrid reaction tank, 3 be recycle pump, 4 be tail gas quantifier, 5 be waste water tank, 6 be jet-pump, 7 be jet reactor, 8 be expansion segment, 9 be trunnion, 10 be contraction section, 11 be water-in, 12 be inlet mouth, 13 be shower nozzle, 14 be water outlet, 15 for angle, a be alkaline waste water, b is sour gas, c for absorbing gas, d is qualified waste water.
Embodiment
Embodiment 1: a kind of pH value control method of alkaline waste water, comprises a hybrid reaction tank 2, and hybrid reaction tank top is provided with a tail gas stream gauge 4, and hybrid reaction pot bottom is provided with a recycle pump 3; Abundant hybrid reaction is carried out after sour gas and alkaline waste water being passed into hybrid reaction tank, the unreacted sour gas in final mixing reactor top and rare gas element enter next step operation after the metering of tail gas stream gauge, the waste water of hybrid reaction pot bottom pH value 6-9 out passes through recycle pump, a part enters the backflow of hybrid reaction tank top, and another part enters next process and uses.
Embodiment 2: the present embodiment comprises a hybrid reaction tank 2, hybrid reaction tank top is provided with a tail gas stream gauge 4, hybrid reaction pot bottom is provided with a recycle pump 3, one gas transmission equipment 1 is set before hybrid reaction tank, sour gas passes into after the pressurization of gas transmission equipment that alkaline waste water that hybrid reaction tank and hybrid reaction tank top passes into is reverse to be contacted, carry out acid-base neutralisation reaction, the unreacted sour gas in final mixing reactor top and rare gas element enter next step operation after the metering of tail gas stream gauge, the waste water of hybrid reaction pot bottom pH value 6-9 out passes through recycle pump, a part enters the backflow of hybrid reaction tank top, another part enters next process and uses.
Embodiment 3: the present embodiment is different from part and is, gas transmission equipment is blower fan.
Embodiment 4: the present embodiment is different from part and is, gas transmission equipment is compressor.
Embodiment 5: the present embodiment comprises a hybrid reaction tank 2, hybrid reaction tank top is provided with a tail gas stream gauge 4, hybrid reaction pot bottom is provided with a recycle pump 3, the waste water tank 5 that before hybrid reaction tank, setting is connected successively, jet-pump 6, jet reactor 7, alkaline waste water is collected in waste water tank, by jet-pump by alkaline waste water positive delivery to the ingress of jet reactor, formed negative pressure sour gas is drawn in jet reactor, sour gas and alkaline waste water are in the inner fully contact reacts of jet reactor, the waste water of the acid gas-containing formed enters in mixing reactor again, react further and gas-liquid separation, the unreacted sour gas in final mixing reactor top and rare gas element enter next step operation after the metering of tail gas stream gauge, the waste water of hybrid reaction pot bottom pH value 6-9 out passes through recycle pump, a part enters the backflow of hybrid reaction tank top, another part enters next process and uses.
Embodiment 6: the present embodiment difference is, jet reactor is one with the equipment of trunnion, trunnion leading portion is contraction section, trunnion rear end is expansion segment, contraction section port is provided with water-in, and inner being connected with water-in of contraction section is equipped with shower nozzle, before shower nozzle is arranged on trunnion, contraction section exterior lateral sides is provided with inlet mouth, and expansion segment port is provided with water outlet.In jet reactor due to alkaline waste water at nozzle place by throttling expansion, thus formed negative pressure, sour gas is drawn in jet reactor, with alkaline waste water abundant contact reacts in jet reactor.Jet reactor has bleeding and reacts the dual function of mixing.
Embodiment 7: the present embodiment difference is in shower nozzle threaded, is connected with water-in pipeline by screw thread, and the angle of shower nozzle runner and level is 5 °.
Embodiment 8: the present embodiment difference is in shower nozzle threaded, is connected with water-in pipeline by screw thread, and the angle of shower nozzle runner and level is 15 °.
Embodiment 9: the present embodiment difference is in shower nozzle threaded, is connected with water-in pipeline by screw thread, and the angle of shower nozzle runner and level is 30 °.
Embodiment 10: the present embodiment difference is in shower nozzle threaded, is connected with water-in pipeline by screw thread, and the angle of shower nozzle runner and level is 45 °.
Embodiment 11: the present embodiment difference is that sour gas is carbonic acid gas, after alkaline waste water is collected in waste water tank, jet reactor is passed through after being pressurizeed by alkaline waste water by jet-pump, the sour gas mouth of pipe place of jet reactor is made to form negative pressure, carbon dioxide is sucked in jet reactor, hybrid reaction abundant with waste water, reacted waste water is again through mixing tank, waste water ph is controlled between 6-9, mixing column top unreacted waste gas qualified discharge completely, the qualified pH value waste water of discharging bottom mixing column carries out waste water circulation by a recycle pump part, another part enters next step operation.
Embodiment 12: the present embodiment difference is that sour gas is hydrogen sulfide.
Embodiment 13: the present embodiment difference is that sour gas is sulfurous gas.
Embodiment 14: the present embodiment difference is that sour gas is the mixed gas of carbonic acid gas, hydrogen sulfide.
Embodiment 15: the present embodiment difference is the multicomponent gas that sour gas is carbonic acid gas, hydrogen sulfide, sulfurous gas mix with arbitrary proportion.
Embodiment 16: the present embodiment difference is the multicomponent gas that sour gas is carbonic acid gas, hydrogen sulfide, sulfurous gas, hydrogenchloride mix with arbitrary proportion.
Embodiment 17: the present embodiment difference is, in hybrid reaction tank, filler is housed.
Claims (8)
1. a pH value control method for alkaline waste water, it is characterized in that comprising a hybrid reaction tank, hybrid reaction tank top is provided with a tail gas stream gauge, and hybrid reaction pot bottom is provided with a recycle pump; Abundant hybrid reaction is carried out after sour gas and alkaline waste water being passed into hybrid reaction tank, the unreacted sour gas in final mixing reactor top and rare gas element enter next step operation after the metering of tail gas stream gauge, the waste water of hybrid reaction pot bottom pH value 6-9 out passes through recycle pump, a part enters the backflow of hybrid reaction tank top, and another part enters next process and uses.
2. the pH value control method of alkaline waste water according to claim 1, one gas transmission equipment is set before it is characterized in that hybrid reaction tank, sour gas passes into after the pressurization of gas transmission equipment that alkaline waste water that hybrid reaction tank and hybrid reaction tank top passes into is reverse to be contacted, and carries out acid-base neutralisation reaction.
3. the pH value control method of alkaline waste water according to claim 2, is characterized in that gas transmission equipment is blower fan or compressor.
4. the pH value control method of alkaline waste water according to claim 1, the waste water tank that before it is characterized in that hybrid reaction tank, setting is connected successively, jet-pump, jet reactor, alkaline waste water is collected in waste water tank, by jet-pump by alkaline waste water positive delivery to the ingress of jet reactor, formed negative pressure sour gas is drawn in jet reactor, sour gas and alkaline waste water are in the inner fully contact reacts of jet reactor, the waste water of the acid gas-containing formed enters in mixing reactor again, reacts further and gas-liquid separation.
5. the pH value control method of alkaline waste water according to claim 4, it is characterized in that jet reactor is one with the equipment of trunnion, trunnion leading portion is contraction section, trunnion rear end is expansion segment, contraction section port is provided with water-in, and inner being connected with water-in of contraction section is equipped with shower nozzle, before shower nozzle is arranged on trunnion, contraction section exterior lateral sides is provided with inlet mouth, and expansion segment port is provided with water outlet.
6. the pH value control method of alkaline waste water according to claim 5, is characterized in that in shower nozzle threaded, is connected with water-in pipeline by screw thread, and the angle of shower nozzle runner and level is 5 °-45 °.
7. the pH value control method of alkaline waste water according to claim 1, is characterized in that sour gas is the multicomponent gas that is a kind of or that mix with arbitrary proportion in carbonic acid gas, hydrogen sulfide, sulfurous gas, hydrogenchloride.
8. the pH value control method of alkaline waste water according to claim 1, is characterized in that, in hybrid reaction tank, filler is housed.
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| CN201510768530.5A CN105293669A (en) | 2015-11-12 | 2015-11-12 | Method for adjusting pH value of alkaline waste water |
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| CN201510768530.5A CN105293669A (en) | 2015-11-12 | 2015-11-12 | Method for adjusting pH value of alkaline waste water |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106479879A (en) * | 2016-10-09 | 2017-03-08 | 南京工业大学 | The adjusting means of pH and its application during a kind of biology decarboxylic reaction |
| CN107551763A (en) * | 2016-09-18 | 2018-01-09 | 叶涛 | The environment-friendly treatment method and its equipment of a kind of organic compounds |
| CN111450663A (en) * | 2020-04-09 | 2020-07-28 | 武汉航禹智通科技有限公司 | Treatment method and treatment device for wet waste gas recovery |
| CN111807495A (en) * | 2020-08-05 | 2020-10-23 | 西安热工研究院有限公司 | Water quality control device and method for preventing corrosion of indirect air-cooling circulating water system |
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| CN111807495A (en) * | 2020-08-05 | 2020-10-23 | 西安热工研究院有限公司 | Water quality control device and method for preventing corrosion of indirect air-cooling circulating water system |
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Application publication date: 20160203 |