CN206705701U - A kind of high ammonia-nitrogen wastewater processing and ammonia recovery system - Google Patents

A kind of high ammonia-nitrogen wastewater processing and ammonia recovery system Download PDF

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Publication number
CN206705701U
CN206705701U CN201720402029.1U CN201720402029U CN206705701U CN 206705701 U CN206705701 U CN 206705701U CN 201720402029 U CN201720402029 U CN 201720402029U CN 206705701 U CN206705701 U CN 206705701U
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pump
ammonia
tank
pipeline
membrane module
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朱和林
杨敏
吕志园
陆芳军
方孟飞
来东奇
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Kaiyuan Environmental Technology Group Co.,Ltd.
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HANGZHOU KAIYUAN ENVIRONMENTAL PROTECTION ENGINEERING Co Ltd
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Abstract

Field of waste water treatment is the utility model is related to, discloses a kind of high ammonia-nitrogen wastewater processing and ammonia recovery system, including the high ammonia-nitrogen wastewater collecting pit being sequentially connected by pipeline(1), waste water lifting pump(2), the first cartridge filter(3), steam plate changes(4), deamination membrane module(5)With outer row pond(6);Pipeline between the waste water lifting pump and the first cartridge filter is provided with adder-subtractor(7), ammonia nitrogen waste water from the shell side inlet and outlet of the deamination membrane module, the import and export of the tube side of deamination membrane module respectively with means for feeding acid(8)And multi-effect evaporating device(9)Connection.The utility model can be purified to high ammonia-nitrogen wastewater and to realizing the recovery of ammonia, and not only purifying rate, the rate of recovery are high, and operating efficiency is high, and cost is low.

Description

A kind of high ammonia-nitrogen wastewater processing and ammonia recovery system
Technical field
It the utility model is related to field of waste water treatment, more particularly to a kind of processing of high ammonia-nitrogen wastewater and ammonia recovery system.
Background technology
With developing rapidly for the industries such as chemical industry, printing and dyeing, chemical fertilizer, the high ammonia-nitrogen wastewater thus occurred turns into industry development Restraining factors.The red tide number that China marine site occurs increases, and ammonia nitrogen is one of main pollution factor, particularly ammonia nitrogen in high density Pollution caused by waste water.Thus, cost-effective control ammonia nitrogen in high density also turns into the important class of current environmental worker research Topic, has obtained the great attention of professional.
Ammonia nitrogen waste water is discharged into water body, particularly flows more slow lake, bay, easily causes in water algae and other micro- Biological amount reproduction, eutrophication pollution is formed, water treatment plants operation on the one hand can be made difficult, cause the peculiar smell of drinking water Outside, it on the other hand can decline oxygen in water, fish mortality, result even in lake destruction.Ammonia nitrogen can also make feedwater Chlorine dosage is increased in sterilization and industrial circulating water sterilisation process, to some metals, particularly there is corrosivity to copper.When During reusing sewage, microorganism can promote the breeding of microorganism in water-supply-pipe and water equipment in recycled water, be blocked up after forming biology Pipeline and water equipment are filled in, and influences heat exchange efficiency.
The in general of ammonia nitrogen waste water is formed as caused by ammoniacal liquor and inorganic ammonia exist jointly, and typically upper pH is in neutrality More than the main source of ammonia nitrogen in waste water be inorganic ammonia and the common effect of ammoniacal liquor, ammonia nitrogens of the pH in waste water under conditions of acidity Mainly due to caused by inorganic ammonia.The method that can effectively handle ammonia nitrogen to this has many, as physical-chemical process have stripping, from Sub- exchange, coagulating sedimentation, counter-infiltration, electrodialysis and various high-level oxidation technologies(AOTs)Etc. a variety of methods;Biological method has nitre The water plant cultivation such as change and algae.But have the advantages that using it is convenient, treatment effect is stable, adapts to waste water quality and economical NH3-N elimination method is still among research.
Utility model content
In order to solve the above-mentioned technical problem, the utility model provides a kind of high ammonia-nitrogen wastewater processing and ammonia recovery system. The utility model can be purified to high ammonia-nitrogen wastewater and to realizing the recovery of ammonia, and not only purifying rate, the rate of recovery are high, Er Qiegong It is low to make efficiency high, cost.
Concrete technical scheme of the present utility model is:A kind of high ammonia-nitrogen wastewater processing and ammonia recovery system, including pass through pipe High ammonia-nitrogen wastewater collecting pit that road is sequentially connected, waste water lifting pump, the first cartridge filter, steam plate change, deamination membrane module and Outer row pond;Pipeline between the waste water lifting pump and the first cartridge filter is provided with adder-subtractor, and ammonia nitrogen waste water is from described The shell side inlet and outlet of deamination membrane module, the import and export of the tube side of deamination membrane module respectively with means for feeding acid and multiple-effect evaporation Device connects.
Operation principle of the present utility model is:
High ammonia-nitrogen wastewater collecting pit:Liquid ammonia pollution is collected paramount ammonia nitrogen with two level acid spray column by one-level Water spray tower and given up Water collecting pit.One side high ammonia-nitrogen wastewater collecting pit is Seal Design, prevents ammonia leakage from triggering security incident;On the other hand deposit Discharge water and be pumped to deamination membrane module by waste water lifting pump, can be according to the start and stop of height of liquid level controlling pump.
The effect of first cartridge filter is that waste water is tentatively filtered, and prevents particulate contaminant in waste water to below Deamination film results in blockage.
The effect that steam plate changes is that waste water is heated, and waste water only reaches ability after certain temperature, and ammonia therein is It can be spun off from water.
Adder-subtractor:Adder-subtractor be in order to keep wastewater pH stable more than 10, because only that under above-mentioned pH, ability Make waste water NH4+Change into ammonia.
Means for feeding acid:Means for feeding acid is to supply acid to the tube side of deamination membrane module, for absorbing the ammonia in tube side.
Deamination membrane module:Waste water enters in the shell side of deamination membrane module, when pH rises in waste water, ammonium ion NH4+Become Free gaseous state NH3.At this moment gaseous state NH3The micropore on the doughnut surface of deamination membrane module can be passed through, ammonia enters from shell side Mixed into tube side, and with sour absorbing liquid, ammonia becomes the NH of ionic state again at once after being absorbed by acid solution4+
Outer row pond, after the ammonia in waste water in shell side is separated, drain into outer row pond.
Multi-effect evaporating device:After acid solution in deamination membrane module tube side absorbs ammonia, lead to multi-effect evaporating device, more Heating evaporation is carried out in effect vaporising device, as concentration increases, ammonium salt crystallizes, and after crystallization is separated with liquid, realizes ammonium The recovery of salt, can directly it be sold.
, it is necessary to which the pH of waste water in the shell side of deamination membrane module is maintained at into more than 10 in said apparatus, and temperature exists More than 35 DEG C, less than 50 DEG C, NH in such waste water phase4+Will continuously become NH3Migration of liquid is absorbed to acid, so as to The ammonia nitrogen concentration of waste water side constantly declines, and acid absorbs liquid phase due to only sour and NH4+, so what is formed is very pure ammonium Salt, it can be recycled.
Preferably, the pipeline that the steam plate is changed between deamination membrane module is provided with cleaning device.
After running the regular hour, the waste water side of the hollow-fibre membrane in deamination membrane module is easily contaminated, it is necessary to enter The regular Chemical cleaning of row, ensure the normal use of film.
Preferably, the adder-subtractor includes alkali storage tank and plus alkali measuring pump;The alkali storage tank plus alkali measuring pump and the One cartridge filter is sequentially connected;And add and be additionally provided with pipeline between alkali measuring pump and alkali stores up tank connected alkali return duct.
Preferably, the cleaning device includes purge tank, cleaning pump and the second cartridge filter;It is the purge tank, clear Pump, the second cartridge filter and deamination membrane module is washed to be sequentially connected;And on the pipeline between cleaning pump and the second cartridge filter Provided with cleaning tank connected cleaning fluid return duct.
Preferably, the quantity of the deamination membrane module is multiple, series connection is formed between multiple deamination membrane modules.
Preferably, sulfuric acid storage tank, acid adding measuring pump, graphite cake that the means for feeding acid includes being sequentially connected change;It is described Graphite cake changes to be connected with deamination membrane module;And acid adding measuring pump and graphite cake alternatively between pipeline be provided be connected with sulfuric acid storage tank Sour return duct.
Inhaled preferably, the multi-effect evaporating device includes diluted acid circulating tank, acid circulating pump, the 3rd cartridge filter, acid Receive liquid collecting pit, MVR feed pumps, preheater, evaporator, discharging pump, thickener, centrifuge, mother liquor tank, mother liquor reflux pump;Institute The outlet that diluted acid circulating tank is stated with the tube side of deamination membrane module is connected, diluted acid circulating tank, acid circulating pump, the 3rd cartridge filter according to It is secondary to be connected by pipeline with the import of deamination membrane module shell side;In addition, diluted acid circulating tank, sour absorbing liquid collecting pit, MVR are fed Pump, preheater, evaporator, discharging pump, thickener, centrifuge, mother liquor tank are sequentially connected by pipeline, and the outlet of mother liquor tank passes through Pipeline is connected with mother liquor reflux pump, discharging pump successively again;And it is additionally provided with to flow back with mother liquor tank on the pipeline after mother liquor reflux pump and connects The mother liquor reflux pipe connect.
The operation principle of above-mentioned multi-effect evaporating device is:
Diluted acid circulating tank is used to reclaim the acid solution after passing through deamination membrane module, and carries out acid to it and recycle.Diluted acid follows Ring tank can also lead to sour absorbing liquid collecting pit and carry out intermediate storage.Acid solution passes through preheater under the conveying of MVR feed pumps Preheat, the ammonium salt in acid solution thoroughly dissolves so that the good fluidity of acid solution, is not easily blocked pipeline.Reach
After evaporator, heating wherein evaporates solvent, is significantly increased raising, the ammonium salt of high concentration in this ammonium salt concentration Acid solution continues through discharging pump and is transported to thickener, is crystallized in thickener, then that the acid solution for being contaminated with crystallization is defeated Centrifuge to be delivered to, crystallizes in the presence of centrifuge and is separated with acid solution, crystallization is collected, and acid solution is transported to mother liquor tank, by Ammonium salt of the acid solution also containing part for crystallization in mother liquor tank, it is transmitted back in evaporator again mixes weight with acid solution below New evaporation, crystallization.Make full use of resource.
In addition, carrying out circulating reflux to the material in mother liquor tank, material can be made to be in flow regime all the time, prevent from blocking up Material.
Preferably, the multi-effect evaporating device also includes forced circulation pump, forced heat-exchanging device and compressor;The pressure Circulating pump forms circulation loop with the entirety that forced heat-exchanging device is formed and discharging pump;The import of the compressor and the steaming of discharging pump Vapor outlet is connected, and the outlet of compressor is connected with forced heat-exchanging device.
The moisture to gasify in evaporator is transported in forced heat-exchanging device after the heating again of compressor;Steam simultaneously Send out device and circulation loop is also formed by forced circulation pump and forced heat-exchanging device, acid solution and the steam after heating in forced heat-exchanging device Carry out heat exchange, the temperature rise of acid solution, solvent volatilization.Above-mentioned attachment structure can abundant recycling heat energy, reduce cost. And the acid solution forced circulation flowing containing ammonium salt, anti-locking apparatus in evaporator is set to be blocked(After ammonium salt concentration uprises in acid solution Solution viscosity greatly improves, and mobility is very poor).
Preferably, the thin liquid outlet on the thickener is connected with mother liquor tank.Liquid level part ammonium salt concentration in thickener Relatively low acid solution, mother liquor tank is fed directly to, is circulated again, without by centrifuge, operating efficiency can be greatly improved.
It is compared with the prior art, the beneficial effects of the utility model are:The utility model can be carried out to high ammonia-nitrogen wastewater Purification and the recovery to realizing ammonia, not only purifying rate, the rate of recovery are high, and operating efficiency is high, and cost is low.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the present utility model;
Fig. 2 is a kind of structural representation of adder-subtractor in the utility model;
Fig. 3 is a kind of structural representation of cleaning device in the utility model;
Fig. 4 is a kind of structural representation of means for feeding acid and multi-effect evaporating device in the utility model.
Reference is:High ammonia-nitrogen wastewater collecting pit 1, waste water lifting pump 2, the first cartridge filter 3, steam plate change 4, taken off Ammonia membrane module 5, outer row pond 6, adder-subtractor 7, means for feeding acid 8, multi-effect evaporating device 9, cleaning device 10, alkali storage tank 11 plus alkali Measuring pump 12, alkali return duct 13, purge tank 14, cleaning pump 15, the second cartridge filter 16, cleaning fluid return duct 17, sulfuric acid storage Tank 18, acid adding measuring pump 19, graphite cake change 20, sour return duct 21, diluted acid circulating tank 22, the security personnel's filtering of acid circulating pump the 23, the 3rd Device 24, sour absorbing liquid collecting pit 25, MVR feed pumps 26, preheater 27, evaporator 28, discharging pump 29, thickener 30, centrifuge 31st, mother liquor tank 32, mother liquor reflux pump 33, mother liquor reflux pipe 34, forced circulation pump 35, forced heat-exchanging device 36, compressor 37.
Embodiment
With reference to embodiment, the utility model will be further described.In the utility model involved device, Connection structure and method, it is device well known in the art, connection structure and method if without refering in particular to.
Embodiment 1
As shown in Figure 1:A kind of high ammonia-nitrogen wastewater processing and ammonia recovery system, including the high ammonia nitrogen being sequentially connected by pipeline Wastewater collection pond 1, waste water lifting pump 2, the first cartridge filter 3, steam plate change 4, four deamination membrane modules 5 connected and outer row Pond 6.Pipeline between the waste water lifting pump and the first cartridge filter is provided with adder-subtractor 7, and ammonia nitrogen waste water takes off from described The shell side inlet and outlet of ammonia membrane module, the import and export of the tube side of deamination membrane module fill with means for feeding acid 8 and multiple-effect evaporation respectively Put 9 connections.The pipeline that the steam plate is changed between deamination membrane module is provided with cleaning device 10.
Wherein, as shown in Fig. 2 the adder-subtractor includes alkali storage tank 11 and plus alkali measuring pump 12.The alkali storage tank plus alkali Measuring pump and the first cartridge filter are sequentially connected;And add and be additionally provided with pipeline between alkali measuring pump and alkali stores up tank connected alkali Return duct 13.
As shown in figure 3, the cleaning device includes purge tank 14, the cartridge filter 16 of cleaning pump 15 and second.It is described clear Cleaning of evaporator, cleaning pump, the second cartridge filter and deamination membrane module are sequentially connected;And between cleaning pump and the second cartridge filter Pipeline is provided with cleaning tank connected cleaning fluid return duct 17.
As shown in figure 4, sulfuric acid storage tank 18, acid adding measuring pump 19, graphite cake that the means for feeding acid includes being sequentially connected change 20.The graphite cake changes to be connected with deamination membrane module;And acid adding measuring pump and graphite cake alternatively between pipeline be provided with and sulfuric acid Store up tank connected sour return duct 21.
As shown in figure 4, the multi-effect evaporating device includes diluted acid circulating tank 22, acid circulating pump 23, the 3rd cartridge filter 24th, sour absorbing liquid collecting pit 25, MVR feed pumps 26, preheater 27, evaporator 28, discharging pump 29, thickener 30, centrifuge 31, Mother liquor tank 32, mother liquor reflux pump 33, forced circulation pump 35, forced heat-exchanging device 36 and compressor 37.The diluted acid circulating tank is with taking off The outlet connection of the tube side of ammonia membrane module, diluted acid circulating tank, acid circulating pump, the 3rd cartridge filter pass sequentially through pipeline and deamination The import connection of membrane module shell side;In addition, diluted acid circulating tank, sour absorbing liquid collecting pit, MVR feed pumps, preheater, evaporator, Discharging pump, thickener, centrifuge, mother liquor tank are sequentially connected by pipeline, and the thin liquid outlet on thickener is directly and mother liquor tank Connection.The outlet of mother liquor tank is connected with mother liquor reflux pump, discharging pump successively again by pipeline;And on the pipeline after mother liquor reflux pump It is additionally provided with the mother liquor reflux pipe 34 with mother liquor tank backflow connection.The entirety that the forced circulation pump is formed with forced heat-exchanging device is with going out Expect that pump forms circulation loop;The import of the compressor and the steam (vapor) outlet of discharging pump are connected, and outlet and the pressure of compressor are changed Hot device connection.
It is described above, only it is preferred embodiment of the present utility model, not the utility model is imposed any restrictions, every Any simple modification, change and the equivalent structure transformation made according to the utility model technical spirit to above example, still Belong to the protection domain of technical solutions of the utility model.

Claims (9)

1. a kind of high ammonia-nitrogen wastewater processing and ammonia recovery system, it is characterised in that:Including the high ammonia nitrogen being sequentially connected by pipeline Wastewater collection pond(1), waste water lifting pump(2), the first cartridge filter(3), steam plate changes(4), deamination membrane module(5)With outer row Pond(6);Pipeline between the waste water lifting pump and the first cartridge filter is provided with adder-subtractor(7), ammonia nitrogen waste water is from institute State the shell side inlet and outlet of deamination membrane module, the import and export of the tube side of deamination membrane module respectively with means for feeding acid(8)And multiple-effect Vaporising device(9)Connection.
2. a kind of high ammonia-nitrogen wastewater processing as claimed in claim 1 and ammonia recovery system, it is characterised in that the steam plate changes Pipeline between deamination membrane module is provided with cleaning device(10).
3. a kind of high ammonia-nitrogen wastewater processing as claimed in claim 1 and ammonia recovery system, it is characterised in that the adder-subtractor Including alkali storage tank(11)With add alkali measuring pump(12);The alkali storage tank plus alkali measuring pump and the first cartridge filter are sequentially connected; And add and be additionally provided with pipeline between alkali measuring pump and alkali stores up tank connected alkali return duct(13).
4. a kind of high ammonia-nitrogen wastewater processing as claimed in claim 2 and ammonia recovery system, it is characterised in that the cleaning device Including purge tank(14), cleaning pump(15)With the second cartridge filter(16);The purge tank, cleaning pump, second security personnel's filtering Device and deamination membrane module are sequentially connected;And the pipeline between cleaning pump and the second cartridge filter is provided with tank connected with cleaning Cleaning fluid return duct(17).
5. a kind of high ammonia-nitrogen wastewater processing as claimed in claim 1 and ammonia recovery system, it is characterised in that the deamination film group The quantity of part is multiple, and series connection is formed between multiple deamination membrane modules.
6. a kind of high ammonia-nitrogen wastewater processing as claimed in claim 1 and ammonia recovery system, it is characterised in that the means for feeding acid Including the sulfuric acid storage tank being sequentially connected(18), acid adding measuring pump(19), graphite cake changes(20);The graphite cake changes and deamination film group Part connects;And acid adding measuring pump and graphite cake alternatively between pipeline be provided with the sour return duct that is connected with sulfuric acid storage tank(21).
7. a kind of high ammonia-nitrogen wastewater processing as claimed in claim 6 and ammonia recovery system, it is characterised in that the multiple-effect evaporation Device includes diluted acid circulating tank(22), acid circulating pump(23), the 3rd cartridge filter(24), sour absorbing liquid collecting pit(25)、MVR Feed pump(26), preheater(27), evaporator(28), discharging pump(29), thickener(30), centrifuge(31), mother liquor tank(32)、 Mother liquor reflux pump(33);The diluted acid circulating tank is connected with the outlet of the tube side of deamination membrane module, diluted acid circulating tank, acid circulation Pump, the 3rd cartridge filter pass sequentially through pipeline and are connected with the import of deamination membrane module shell side;In addition, diluted acid circulating tank, acid are inhaled Liquid collecting pit, MVR feed pumps, preheater, evaporator, discharging pump, thickener, centrifuge, mother liquor tank is received by pipeline successively to connect Connect, the outlet of mother liquor tank is connected with mother liquor reflux pump, discharging pump successively again by pipeline;And on the pipeline after mother liquor reflux pump also Provided with the mother liquor reflux pipe with mother liquor tank backflow connection(34).
8. a kind of high ammonia-nitrogen wastewater processing as claimed in claim 7 and ammonia recovery system, it is characterised in that the multiple-effect evaporation Device also includes forced circulation pump(35), forced heat-exchanging device(36)And compressor(37);The forced circulation pump and forced heat-exchanging The entirety that device is formed forms circulation loop with discharging pump;The import of the compressor and the steam (vapor) outlet of discharging pump connect, compression The outlet of machine is connected with forced heat-exchanging device.
9. a kind of high ammonia-nitrogen wastewater processing as claimed in claim 7 and ammonia recovery system, it is characterised in that on the thickener Thin liquid outlet be connected with mother liquor tank.
CN201720402029.1U 2017-04-17 2017-04-17 A kind of high ammonia-nitrogen wastewater processing and ammonia recovery system Active CN206705701U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107117755A (en) * 2017-04-17 2017-09-01 杭州开源环保工程有限公司 A kind of high ammonia-nitrogen wastewater processing and ammonia recovery system and its method
CN111635086A (en) * 2020-07-14 2020-09-08 常州时升环境工程科技有限公司 Zero discharge system for producing ammonium salt from ammonia nitrogen-containing wastewater and treatment process thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107117755A (en) * 2017-04-17 2017-09-01 杭州开源环保工程有限公司 A kind of high ammonia-nitrogen wastewater processing and ammonia recovery system and its method
CN111635086A (en) * 2020-07-14 2020-09-08 常州时升环境工程科技有限公司 Zero discharge system for producing ammonium salt from ammonia nitrogen-containing wastewater and treatment process thereof

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Address after: Room 1701, building 1, No.22, Xinbei Road, Oriental Century Center, Xiaoshan District, Hangzhou City, Zhejiang Province 311200

Patentee after: Kaiyuan Environmental Technology Group Co.,Ltd.

Address before: Room 1701, building 1, No.22, Xinbei Road, Oriental Century Center, Xiaoshan District, Hangzhou City, Zhejiang Province 311200

Patentee before: HANGZHOU KAIYUAN ENVIRONMENTAL ENGINEERING CO.,LTD.