CN212609643U - Ammonia nitrogen wastewater treatment and ammonia recovery device - Google Patents
Ammonia nitrogen wastewater treatment and ammonia recovery device Download PDFInfo
- Publication number
- CN212609643U CN212609643U CN202021695877.4U CN202021695877U CN212609643U CN 212609643 U CN212609643 U CN 212609643U CN 202021695877 U CN202021695877 U CN 202021695877U CN 212609643 U CN212609643 U CN 212609643U
- Authority
- CN
- China
- Prior art keywords
- ammonia
- heat pump
- steam
- reboiler
- condenser
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0033—Other features
- B01D5/0036—Multiple-effect condensation; Fractional condensation
-
- 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
- B01D53/002—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 condensation
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/02—Preparation, purification or separation of ammonia
- C01C1/12—Separation of ammonia from gases and vapours
-
- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/043—Details
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The utility model relates to a device for treating ammonia nitrogen wastewater and recovering ammonia, which belongs to the technical field of industrial wastewater treatment and comprises an ammonia-removing tower, a heat pump reboiler, a heat pump condenser and a heat pump compressor; an ammonia nitrogen wastewater feed port is arranged between the rectifying section and the stripping section of the deamination tower, the rectifying section is provided with an ammonia-containing steam discharge port and a dilute ammonia water reflux port, and the stripping section is provided with a water discharge port after deamination and a stripping steam feed port; a heat pump reboiler is circularly communicated between the deamination water discharge port and the stripping steam feed port; a heat pump condenser is circularly communicated between the discharge hole of the ammonia-containing steam and the return hole of the dilute ammonia water; the heat pump condenser and the heat pump reboiler are in circulating communication through the heat pump compressor to form a heat pump cycle. The heat pump working medium steam is used for supplying heat for the heat pump reboiler to replace the use of raw steam, so that the energy is saved and the consumption is reduced; the heat pump compressor is used for pressurizing non-toxic and harmless heat pump working medium steam, and the problem of potential safety hazard in the prior art of directly pressurizing ammonia-containing steam is solved.
Description
Technical Field
The utility model belongs to the technical field of industrial wastewater treatment, a device of ammonia nitrogen waste water treatment and recovery ammonia is related to.
Background
In the production process of chemical industry, chemical fertilizer, pesticide, printing and dyeing, battery and other industries, a large amount of ammonia nitrogen wastewater is generated, wherein the ammonia nitrogen is free ammonia (NH)3) And ammonium ion (NH)4 +) Exist in the form of (1). After the sewage containing ammonia nitrogen is discharged into a water body, the ammonia nitrogen has high oxygen consumption and has toxic action on aquatic organisms, and is oxidized into nitrite and nitrate under the action of nitrobacteria, so that the sewage is toxic to human bodies. The country has strict regulations and limits on the content of ammonia nitrogen in the discharged wastewater.
At present, the ammonia nitrogen wastewater treatment method mainly comprises a biological method, a chemical method and a physical method, wherein the biological method comprises nitrification and algae cultivation, the chemical method comprises an ion exchange method, a chemical precipitation method and a breakpoint chlorination method, and the physical method comprises a membrane separation method and a stripping method. The biological method has good treatment effect, no secondary pollution, but difficult strain culture and weak load resistance, and is only suitable for low-concentration ammonia nitrogen wastewater; some chemical methods have high operation cost, and some chemical methods can cause secondary pollution; the membrane separation method in the physical method has the problems of membrane leakage and membrane pollution, and has high equipment investment and operation cost.
The stripping method is divided into an air stripping method and a steam stripping method, and air stripping or steam stripping is carried out under alkaline conditions, so that volatile substances such as ammonia nitrogen in the wastewater are continuously transferred from a liquid phase to a gas phase, and the aim of removing the ammonia nitrogen in the wastewater is fulfilled. The air stripping method is suitable for treating ammonia nitrogen wastewater at normal temperature, ammonia nitrogen transferred into the air easily causes secondary pollution of the atmosphere, a large amount of air is required, and power consumption is high. In contrast, the steam stripping method can improve the water temperature of the wastewater and has higher ammonia nitrogen removal rate, and ammonia, ammonia water or ammonium salt is prepared from ammonia-containing steam obtained by steam stripping through methods such as rectification/condensation/absorption/chemical treatment and the like, so that the ammonia, the ammonia water or the ammonium salt can be recycled, secondary pollution is avoided, and the method becomes a main method for treating the ammonia nitrogen wastewater at present.
The traditional process for treating ammonia nitrogen wastewater by adopting a single tower to carry out steam stripping has the steam consumption generally up to 250-300kg/t wastewater and higher energy consumption. The double-effect steam stripping can reduce the steam unit consumption, but the process is complex, the equipment quantity is large, and the investment is high. The existing scheme of adopting heat pump technology to save energy and reduce consumption adopts a compressor to directly pressurize and heat ammonia-containing steam obtained by steam stripping to supply heat to a reboiler, and the ammonia-containing steam is flammable, toxic and has strong pungent smell, so that mucous membranes of skin, eyes and respiratory organs can be burned, certain potential safety hazards exist in the process of directly pressurizing the ammonia-containing steam, meanwhile, the compressor is movable equipment, sealing parts are likely to leak after being worn in the long-term operation process, harm is generated to operating personnel, and when the ammonia concentration is within the explosion limit range, the ammonia-containing steam also has the danger of combustion and even explosion. Therefore, the prior art lacks a scheme for treating the ammonia nitrogen wastewater which can give consideration to good safety performance, low energy consumption, small equipment investment, simple flow, high recycling rate and no secondary pollution.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing an ammonia nitrogen wastewater treatment and device of retrieving ammonia utilizes heat pump technology to carry out energy saving and consumption reduction to what heat pump compressor pressurization was handled is nontoxic harmless heat pump working medium steam, and what non-deamination tower obtained contains ammonia steam, and the security obtains the guarantee, solves among the prior art problem that there is the potential safety hazard in direct pressurization containing ammonia steam.
In order to achieve the above purpose, the utility model provides a following technical scheme:
a device for treating ammonia nitrogen wastewater and recovering ammonia comprises an ammonia-removing tower, a heat pump reboiler, a heat pump condenser and a heat pump compressor;
the deamination tower comprises a rectification section and a stripping section, wherein an ammonia nitrogen wastewater feed port is arranged between the two sections, the rectification section is provided with an ammonia-containing steam discharge port and a dilute ammonia water reflux port, and the stripping section is provided with a deaminated water discharge port and a stripping steam feed port;
the deamination water discharge port and the stripping steam feed port are circularly communicated with the cold side of the heat pump reboiler; the heat pump condenser hot side is communicated with the ammonia-containing steam discharge port and the dilute ammonia water return port in a circulating manner; and a heat pump compressor is connected between the cold side of the heat pump condenser and the hot side of the heat pump reboiler.
Furthermore, a heat pump working medium liquid return pipeline is communicated from the hot side of the heat pump reboiler to the cold side of the heat pump condenser to form heat pump circulation.
Further, the device also comprises a spray condenser, and a concentrated ammonia steam pipeline is communicated between the hot side of the spray condenser and the hot side of the heat pump condenser; the hot side of the spray condenser is communicated with a concentrated ammonia water extraction pipeline and a concentrated ammonia water spray pipeline, and the cold side of the spray condenser is communicated with a cooling working medium introduction pipeline and a cooling working medium extraction pipeline.
Further, a spray liquid cooler is communicated with the concentrated ammonia water spray pipeline.
Furthermore, a dilute ammonia water pipeline is communicated between the hot side of the heat pump condenser and the hot side of the spray liquid cooler.
And the other reboiler is communicated with a heating working medium introducing pipeline and a heating working medium extracting pipeline at the hot side, and the other reboiler at the cold side is communicated with the deamination tower through the deamination water introducing pipeline and the steam outlet pipeline.
Further, the heat pump compressor is composed of one or more stages.
Further, a steam mixer is connected between the heat pump compressor and the hot side of the heat pump reboiler.
Further, the deamination tower comprises a rectifying tower serving as a rectifying section and a stripping tower serving as a stripping section; or the deamination tower is formed by connecting a plurality of hypergravity towers in series or in parallel.
The beneficial effects of the utility model reside in that:
(1) the utility model discloses a device of ammonia nitrogen waste water treatment and recovery ammonia, heat pump working medium liquid forms heat pump working medium steam after the heat transfer in the heat pump condenser, gets into heat pump compressor pressurization and intensifies, and what heat pump compressor pressurization was handled is nontoxic harmless heat pump working medium steam (like heat pump working medium steam), and the non-has the ammonia steam that contains of poisoning the characteristic to avoid direct pressurization to contain the potential safety hazard that the ammonia steam exists, improve the security performance.
(2) The utility model discloses a device of ammonia nitrogen waste water treatment and recovery ammonia constitutes the heat pump circulation between heat pump condenser, heat pump compressor and the heat pump reboiler, turns into the low-grade heat energy that the deamination tower contains ammonia steam high-grade heat energy, for the heat pump reboiler heat supply, replaces the use of a large amount of live steam, reduces the condensation load that the deamination tower contains ammonia steam simultaneously, and the comprehensive energy consumption is showing and is reducing.
(3) The utility model discloses a device of ammonia nitrogen waste water treatment and recovery ammonia, adopt the mode of substep condensation, contain ammonia steam and get dilute ammonia water and concentrated ammonia steam into the condensation of heat pump condenser one-level, concentrated ammonia steam gets into the fountain condenser and carries out the second grade condensation and obtain concentrated ammonia water, the second grade condensation that concentrated ammonia water or concentrated ammonia water after will cooling and partial dilute ammonia water are used for the fountain condenser as the spray solution, play and absorb the effect of ammonia in the concentrated ammonia steam of non-condensation, thereby make the complete condensation of concentrated ammonia steam, obtain the aqueous ammonia product of high concentration (≧ 20%), the rate of recovery is high, be convenient for recycle, avoid secondary pollution.
(4) The utility model discloses a device of ammonia nitrogen waste water treatment and recovery ammonia only needs a rectifying column (deamination tower) can make the deamination after water reach national one-level emission standard (ammonia nitrogen content is less than or equal to 15mg/L), retrieve the aqueous ammonia product that obtains the high concentration simultaneously, the flow is simple, equipment is small in quantity, equipment investment is little, area is little.
(5) The utility model discloses a device of ammonia nitrogen waste water treatment and recovery ammonia compares with the device that uses raw steam for the reboiler heat supply, does not change the load and the load of deamination tower, not only can be used to the design of new installation, also can be used to the energy-conserving transformation of current device, and application scope is wide.
Drawings
In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention provides the following drawings for illustration:
fig. 1 is a schematic flow chart of embodiment 1 of the present invention;
fig. 2 is a schematic flow chart of embodiment 2 of the present invention;
fig. 3 is a schematic flow chart of embodiment 3 of the present invention.
Reference numerals: the system comprises a waste water preheater 1, a deamination tower 2, a heat pump condenser 3, a heat pump compressor 4, a heat pump reboiler 5, a spray liquid cooler 6, a spray condenser 7, a raw steam reboiler 8 and a steam mixer 9.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Example 1:
as shown in fig. 1, the embodiment provides a device for treating ammonia nitrogen wastewater and recovering ammonia, which comprises a wastewater preheater 1, a deamination tower 2, a heat pump condenser 3, a heat pump compressor 4, a heat pump reboiler 5, a spray liquid cooler 6 and a spray condenser 7.
The deamination tower 2 is a vertical single tower body and comprises a rectification section and a stripping section, wherein the rectification section is positioned above the stripping section. An ammonia nitrogen wastewater feed port is arranged between the rectifying section and the stripping section, the rectifying section is provided with an ammonia-containing steam discharge port and a dilute ammonia water reflux port, and the stripping section is provided with a water discharge port after deamination and a stripping steam feed port.
Waste water pre-heater 1 communicates with ammonia nitrogen waste water feed inlet and the water discharge gate after the deamination of deamination tower 2, and waste water pre-heater 1 intercommunication has ammonia nitrogen waste water to let in pipeline and the water discharge tube after the deamination.
The deamination water discharge port and the stripping steam feed port are circularly communicated with the cold side of a heat pump reboiler 5; the discharge hole of the ammonia-containing steam and the return hole of the dilute ammonia water are circularly communicated with the hot side of the heat pump condenser 3; a heat pump compressor 4 is connected between the cold side of the heat pump condenser 3 and the hot side of the heat pump reboiler 5.
And a heat pump working medium liquid return pipeline is communicated from the hot side of the heat pump reboiler 5 to the cold side of the heat pump condenser 3 to form heat pump circulation.
A concentrated ammonia steam pipeline is communicated between the hot side of the spray condenser 7 and the hot side of the heat pump condenser 3; the hot side of the spray condenser 7 is communicated with a concentrated ammonia water extraction pipeline and a concentrated ammonia water spray pipeline, and the cold side of the spray condenser 7 is communicated with a cooling working medium introduction pipeline and a cooling working medium extraction pipeline. The concentrated ammonia water spraying pipeline is communicated with a spraying liquid cooler 6.
In this embodiment, the heat pump compressor 4 is one stage. In other embodiments, the heat pump compressors 4 may be arranged in multiple stages in series, and the heat pump working medium desuperheaters are connected between adjacent stages of the heat pump compressors 4, according to actual needs.
The method for treating ammonia nitrogen wastewater and recovering ammonia by using the device provided by the embodiment comprises the following steps:
firstly, mixing ammonia nitrogen wastewater with alkali liquor (the alkali liquor can be sodium hydroxide aqueous solution) for alkalization treatment, so that the pH value of the discharged deaminated water reaches 9.5-12; then, the ammonia nitrogen wastewater after the alkalization treatment is subjected to heat exchange and temperature rise with the water after the deamination from the deamination tower 2 through a wastewater preheater 1, and then is introduced into the deamination tower 2 for deamination; discharging the deamination water which is subjected to heat exchange and heat energy recovery in the wastewater preheater 1 to a subsequent working procedure;
ammonia-containing steam is obtained from an ammonia-containing steam discharge port of the deamination tower 2, the ammonia-containing steam enters the hot side of the heat pump condenser 3 and exchanges heat with heat pump working medium liquid (in the embodiment, the heat pump working medium liquid is water) on the cold side of the heat pump condenser 3, part of the water vapor in the ammonia-containing steam and ammonia are condensed to form dilute ammonia water, the dilute ammonia water leaves the hot side of the heat pump condenser 3, and the dilute ammonia water is completely sent to the deamination; water vapor and ammonia which are not condensed in the ammonia-containing steam form concentrated ammonia steam which leaves the hot side of the heat pump condenser 3 and becomes a recovered ammonia resource;
heat pump working medium liquid on the cold side of the heat pump condenser 3 exchanges heat with ammonia-containing steam to generate heat pump working medium steam (in the embodiment, the heat pump working medium steam is heat pump working medium steam), the heat pump working medium steam is pressurized by a heat pump compressor 4 and then enters the hot side of a heat pump reboiler 5 to exchange heat with deaminated water from a deamination tower 2 on the cold side of the heat pump reboiler 5, and the heat pump working medium liquid is condensed to leave the hot side of the heat pump reboiler 5; the water after deamination at the cold side of the heat pump reboiler 5 exchanges heat and then is partially vaporized, the generated steam returns to the deamination tower 2 and is used as stripping steam of a stripping section of the deamination tower 2, and the unvaporized part can return to the deamination tower 2 through a stripping steam feed inlet or can be directly extracted;
leading the heat pump working medium liquid which leaves the hot side of the heat pump reboiler 5 into the cold side of the heat pump condenser 3 in a circulating manner to form a heat pump cycle;
the concentrated ammonia steam leaving the hot side of the heat pump condenser 3 enters the hot side of the spray condenser 7 to exchange heat with a cooling working medium (in the embodiment, the cooling working medium adopts circulating cooling water) at the cold side of the spray condenser 7, and condensed to form concentrated ammonia water; one part of the concentrated ammonia water is cooled by the spray liquid cooler 6 and then returns to the hot side of the spray condenser 7 as spray liquid, and the other part of the concentrated ammonia water is taken out as an ammonia water product.
In other embodiments, a dilute ammonia water pipeline can be communicated between the hot side of the heat pump condenser 3 and the hot side of the spray liquid cooler 6, part of the dilute ammonia water in the heat pump condenser 3 is sent to the deamination tower 2, and the rest part of the dilute ammonia water is cooled by the spray liquid cooler 6 and then is introduced into the hot side of the spray condenser 7 as spray liquid.
In this embodiment, the flow of ammonia nitrogen wastewater is 80m3The ammonia nitrogen content is 3000 mg/L. After treatment, the content of ammonia nitrogen in the deamination water is 5.2mg/L, the deamination water reaches the national first-level emission standard, and the ammonia removal rate is high.
In the heat pump condenser 3, since the saturated vapor pressure of water is lower than that of ammonia at the same temperature, water vapor is more easily condensed than ammonia, and the condensation fraction of water vapor in ammonia-containing vapor is higher than that of ammonia, so that the content of ammonia in ammonia-containing vapor which is not condensed is increased, and the ammonia-containing vapor which is not condensed becomes concentrated ammonia vapor; the dew point of the ammonia-containing vapor is lowered to be lower than the lowest condensation temperature provided by the heat pump condenser 3, so that part of ammonia can not be completely condensed, and only dilute ammonia water with lower concentration can be obtained. In this embodiment, the spray condenser 7 is introduced, the non-condensed concentrated ammonia vapor in the heat pump condenser 3 enters the hot side of the spray condenser 7, condensed after heat exchange to form concentrated ammonia water, and part of the concentrated ammonia water is cooled and then enters the hot side of the spray condenser 7 as spray liquid, so that the effect of absorbing ammonia in the non-condensed concentrated ammonia vapor is achieved, and the concentrated ammonia vapor is completely condensed. The concentration of the strong ammonia water reaches 20.5 percent, the recovery rate of ammonia is improved, the recycling of ammonia resources is facilitated, and the secondary pollution is prevented.
In other embodiments, the diluted ammonia water in the heat pump condenser 3 can be partially introduced into the hot side of the spray condenser 7 to be sprayed as a spraying liquid.
The heat pump circulation is formed among the heat pump condenser 3, the heat pump compressor 4 and the heat pump reboiler 5, the use of a large amount of raw steam is replaced, the power consumption for treating each ton of ammonia nitrogen wastewater is 13.9 degrees (the efficiency of the heat pump compressor 4 is 83 percent), and the comprehensive energy consumption is obviously reduced.
The heat pump working medium liquid forms heat pump working medium steam after heat exchange in the heat pump condenser 3, the heat pump working medium steam enters the heat pump compressor for pressurization and temperature rise, and the heat pump compressor performs pressurization treatment on the non-toxic and harmless heat pump working medium steam (such as heat pump working medium steam in the embodiment and other media) instead of ammonia-containing steam with toxic and harmful characteristics, so that potential safety hazards caused by directly pressurizing the ammonia-containing steam are avoided, and the safety performance is improved.
In the embodiment, only one deamination tower 2 is arranged, so that the deamination water reaches the national first-level discharge standard, and a high-concentration ammonia water product is obtained. Of course, in other embodiments, the deamination column 2 may be split into a rectification column as the rectification section and a stripping column as the stripping section; or the deamination tower 2 is formed by arranging a plurality of hypergravity towers in series or in parallel. Through the combination configuration of a plurality of towers, realize the utility model discloses well deamination tower 2's basic function reaches the utility model discloses well deamination tower 2's basic effect, this kind of combination configuration falls into equally the utility model discloses a protection scope.
Example 2:
the difference between the embodiment 2 and the embodiment 1 is that a steam mixer 9 is connected between the hot sides of the heat pump compressor 4 and the heat pump reboiler 5, and a condensed water extraction pipeline is communicated between the heat pump reboiler 5 and the heat pump condenser 3.
The application method is different, in example 2, the raw steam and the heat pump working medium steam are mixed by a steam mixer 9 and introduced into the hot side of the heat pump reboiler 5 to supply heat to the heat pump reboiler 5; the raw steam and the heat pump working medium steam form condensed water after heat exchange, one part of the condensed water is used as heat pump working medium liquid and returns to the cold side of the heat pump condenser 3, and the other part of the condensed water is extracted to keep the total amount of the heat pump working medium liquid in a recycling state balanced.
In this embodiment, the flow of ammonia nitrogen wastewater is 30m3The ammonia nitrogen content is 20000 mg/L. After treatment, the ammonia nitrogen content in the deamination water is 12.5mg/L, the ammonia water product concentration is 22.0%, the raw steam consumption for treating each ton of wastewater is 48.2kg, and the power consumption is 2.6 degrees (the efficiency of the heat pump compressor 4 is 83%).
The technical scheme disclosed in the embodiment can be used for building a new device, is also suitable for energy-saving transformation of the original device for supplying heat to the reboiler by using raw steam, replaces the original reboiler for supplying heat by using raw steam into a reboiler with a larger heat exchange area, and is equivalent to the heat pump reboiler 5 in the embodiment, and because water is used as the heat pump working medium liquid, the raw steam and the pressurized steam can be mixed and then be supplied heat to the heat pump reboiler 5.
After the improvement, compare with former device, the live steam quantity significantly reduces, can adjust the reduction range of live steam according to the change of live steam and power consumption price during operation, makes manufacturing cost reduce to the minimum.
Example 3:
embodiment 3 differs from embodiment 1 in that a raw steam reboiler 8 is further included, and raw steam is used as a heating working medium. The hot side intercommunication of live steam reboiler 8 has heating working medium to introduce pipeline and heating working medium extraction pipeline, and 8 cold sides of live steam reboiler are through water introduction pipeline and steam outlet pipeline behind the deamination and deamination tower 2 intercommunication, and water discharge gate intercommunication after the deamination of water introduction pipeline and deamination tower 2 behind the deamination, another steam feed inlet intercommunication that steam outlet pipeline and the stripping section of deamination tower 2 set up.
The using method is different, in embodiment 3, a raw steam reboiler 8 is additionally arranged outside the heat pump reboiler 5, and raw steam is used as a heating working medium to provide stripping steam for the deamination tower 2, specifically, water at the bottom of the deamination tower 2 after deamination is divided into three parts, one part enters the cold side of the heat pump reboiler 5, the other part enters the hot side of the wastewater preheater 1 to exchange heat with ammonia nitrogen wastewater and then is discharged, the other part enters the cold side of the raw steam reboiler 8 to exchange heat with raw steam entering the hot side of the raw steam reboiler 8, the raw steam after heat exchange forms condensed water to be extracted, the water after deamination is partially vaporized to form stripping steam to return to the deamination tower 2, and the unvaporized part can return to the deamination tower 2 through a stripping steam feed port and can also be.
In this embodiment, the flow of ammonia nitrogen wastewater is 60m3The ammonia nitrogen content is 7000 mg/L. After treatment, the ammonia nitrogen content in the deamination water is 9.8mg/L, the ammonia water product concentration is 21.2%, the raw steam consumption for treating each ton of wastewater is 37.6kg, and the power consumption is 2.5 degrees (the efficiency of the heat pump compressor 4 is 83%).
The technical scheme disclosed by the embodiment can be used for the construction of a new device and is also suitable for the energy-saving transformation of the original device which uses the raw steam to supply heat for the reboiler, the reboiler in the original device is equivalent to the raw steam reboiler 8 in the embodiment, and a heat pump reboiler 5 is additionally arranged on the basis.
After the improvement, compare with former device, the live steam quantity significantly reduces, can adjust the reduction range of live steam according to the change of live steam and power consumption price during operation, makes manufacturing cost reduce to the minimum.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the scope of the claims of the present invention.
Claims (9)
1. A device for treating ammonia nitrogen wastewater and recovering ammonia is characterized by comprising an ammonia-removing tower, a heat pump reboiler, a heat pump condenser and a heat pump compressor;
the deamination tower comprises a rectification section and a stripping section, wherein an ammonia nitrogen wastewater feed port is arranged between the two sections, the rectification section is provided with an ammonia-containing steam discharge port and a dilute ammonia water reflux port, and the stripping section is provided with a deaminated water discharge port and a stripping steam feed port;
the deamination water discharge port and the stripping steam feed port are circularly communicated with the cold side of the heat pump reboiler; the heat pump condenser hot side is communicated with the ammonia-containing steam discharge port and the dilute ammonia water return port in a circulating manner; and a heat pump compressor is connected between the cold side of the heat pump condenser and the hot side of the heat pump reboiler.
2. The ammonia-nitrogen wastewater treatment and ammonia recovery device of claim 1, wherein a heat pump working medium liquid return pipeline is communicated from the hot side of the heat pump reboiler to the cold side of the heat pump condenser to form a heat pump cycle.
3. The ammonia nitrogen wastewater treatment and ammonia recovery device of claim 1, further comprising a spray condenser, wherein a concentrated ammonia steam pipeline is communicated between the hot side of the spray condenser and the hot side of the heat pump condenser; the hot side of the spray condenser is communicated with a concentrated ammonia water extraction pipeline and a concentrated ammonia water spray pipeline, and the cold side of the spray condenser is communicated with a cooling working medium introduction pipeline and a cooling working medium extraction pipeline.
4. The ammonia nitrogen wastewater treatment and ammonia recovery device of claim 3, wherein the concentrated ammonia water spraying pipeline is communicated with a spray liquid cooler.
5. The ammonia-nitrogen wastewater treatment and ammonia recovery device of claim 4, wherein a dilute ammonia water pipeline is communicated between the hot side of the heat pump condenser and the hot side of the spray liquid cooler.
6. The ammonia nitrogen wastewater treatment and ammonia recovery device of claim 1, further comprising another reboiler, wherein the hot side of the other reboiler is communicated with a heating working medium introducing pipeline and a heating working medium extracting pipeline, and the cold side is communicated with the deamination tower through a deamination water introducing pipeline and a steam outlet pipeline.
7. The ammonia-nitrogen wastewater treatment and ammonia recovery device of claim 1, wherein the heat pump compressor is composed of one or more stages.
8. The ammonia-nitrogen wastewater treatment and ammonia recovery device of claim 1, wherein a steam mixer is connected between the heat pump compressor and the hot side of the heat pump reboiler.
9. The ammonia-nitrogen wastewater treatment and ammonia recovery device of claim 1, wherein the ammonia removal tower comprises a rectifying tower as a rectifying section and a stripping tower as a stripping section; or the deamination tower is formed by connecting a plurality of hypergravity towers in series or in parallel.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010790533X | 2020-08-07 | ||
| CN202010790533 | 2020-08-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212609643U true CN212609643U (en) | 2021-02-26 |
Family
ID=72917905
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010819833.6A Pending CN111825145A (en) | 2020-08-07 | 2020-08-14 | Method and device for treating ammonia nitrogen wastewater and recovering ammonia |
| CN202021695877.4U Active CN212609643U (en) | 2020-08-07 | 2020-08-14 | Ammonia nitrogen wastewater treatment and ammonia recovery device |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010819833.6A Pending CN111825145A (en) | 2020-08-07 | 2020-08-14 | Method and device for treating ammonia nitrogen wastewater and recovering ammonia |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN111825145A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111825145A (en) * | 2020-08-07 | 2020-10-27 | 吴嘉 | Method and device for treating ammonia nitrogen wastewater and recovering ammonia |
| CN115367943A (en) * | 2022-08-22 | 2022-11-22 | 吴嘉 | Energy-saving salt-containing heavy ammonia nitrogen-containing wastewater treatment system and process |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112479296A (en) * | 2020-12-14 | 2021-03-12 | 昆山三一环保科技有限公司 | Deamination processing system |
| CN112875783A (en) * | 2021-04-14 | 2021-06-01 | 北京中科康仑环境科技研究院有限公司 | System and method for treating wastewater containing volatile substances |
| CN115286162A (en) * | 2022-08-22 | 2022-11-04 | 吴嘉 | Device and method for treating ammonia nitrogen wastewater easy to scale and recycling ammonia |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101240953A (en) * | 2007-11-20 | 2008-08-13 | 东南大学 | Ammonia compression -absorption composite heat pump circulating device and circulate method |
| CN103964528B (en) * | 2013-01-28 | 2016-04-13 | 北京阳光欣禾科技有限公司 | A kind of heat pump distillation stripping deamination method |
| CN103408086A (en) * | 2013-08-02 | 2013-11-27 | 天华化工机械及自动化研究设计院有限公司 | MVR (Mechanical Vapor Recompression) vapor-stripping deamination system and application method thereof |
| CN206269615U (en) * | 2016-12-06 | 2017-06-20 | 吴嘉 | A kind of spraying condenser |
| CN110124343B (en) * | 2019-04-08 | 2021-12-14 | 浙江洁普环保科技有限公司 | Working medium heat pump rectification process |
| CN210528514U (en) * | 2019-09-19 | 2020-05-15 | 北京森麟技术有限公司 | Waste liquid deamination pretreatment system |
| CN111825145A (en) * | 2020-08-07 | 2020-10-27 | 吴嘉 | Method and device for treating ammonia nitrogen wastewater and recovering ammonia |
-
2020
- 2020-08-14 CN CN202010819833.6A patent/CN111825145A/en active Pending
- 2020-08-14 CN CN202021695877.4U patent/CN212609643U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111825145A (en) * | 2020-08-07 | 2020-10-27 | 吴嘉 | Method and device for treating ammonia nitrogen wastewater and recovering ammonia |
| CN115367943A (en) * | 2022-08-22 | 2022-11-22 | 吴嘉 | Energy-saving salt-containing heavy ammonia nitrogen-containing wastewater treatment system and process |
| CN115367943B (en) * | 2022-08-22 | 2024-02-02 | 吴嘉 | Energy-saving salt-containing heavy ammonia nitrogen-containing wastewater treatment system and process |
| WO2024041327A1 (en) * | 2022-08-22 | 2024-02-29 | 吴嘉 | Energy-saving treatment system and process for salt-containing and heavy metal-containing ammonia-nitrogen wastewater |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111825145A (en) | 2020-10-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212609643U (en) | Ammonia nitrogen wastewater treatment and ammonia recovery device | |
| CN106315726B (en) | A kind of biogas slurry decarburization combining deamination system | |
| CN111392947B (en) | Ammonia water resource utilization process and device | |
| CN104843816A (en) | Method for combined production of ammonium sulfate and ammonia water through heat pump flash evaporation, stripping and deamination | |
| CN101913669B (en) | Multi-effect energy-saving ammonia recovery process and device | |
| CN206407915U (en) | The device of high-purity ammoniacal liquor is produced from ammonia nitrogen waste water | |
| CN220201877U (en) | Carbon reduction and synergy device for solid-state fermented glutinous rice steamer brewing process | |
| CN204644041U (en) | A kind of ammonia nitrogen waste water treatment system | |
| CN112374561A (en) | High-efficiency energy-saving double-heat-pump deamination method and device | |
| CN104860465A (en) | Double-tower catalysis thermal-coupling reflux deamination method and deamination device thereof | |
| CN218435358U (en) | Device for treating ammonia-nitrogen wastewater easy to scale and recovering ammonia | |
| CN205603392U (en) | Device is prepared to treatment of ammonia nitrogen waste water and aqueous ammonia | |
| CN204874161U (en) | Device of ammonia nitrogen in filtration liquid is got rid of to negative pressure ammonia still process method | |
| CN201686513U (en) | Steam afterheat utilization unit and system for vacuum device of sea water desalination system | |
| CN108467049B (en) | System for retrieve ammonia in follow tombarthite separation waste liquid | |
| CN215249583U (en) | Waste acid concentration regeneration sulfuric acid production line | |
| CN104829032A (en) | Ammonia-nitrogen wastewater treatment system | |
| CN203451325U (en) | High-ammonia-and-nitrogen wastewater treating and ammonia water recycling device | |
| CN214031795U (en) | Energy-efficient two heat pump deamination device | |
| CN214612003U (en) | Multiple-effect energy-saving concentrating complete equipment for dilute sulfuric acid | |
| CN211676993U (en) | A waste gas recovery device for chemical industry enterprise | |
| CN201801393U (en) | Multiple-effect equipment used in energy-saving ammonia recovering process | |
| CN206375770U (en) | A kind of steam stripping amino acid waste water preprocessing system of improvement | |
| CN219117177U (en) | Deamination system of high concentration ammonia nitrogen waste water | |
| CN212687820U (en) | Power plant's condensate water regeneration waste water embrane method deamination processing system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220110 Address after: 401122 6-4, building 4, No. 68, Jinyu Avenue, North New Area, Yubei District, Chongqing Patentee after: Chongqing Green Jia Technology Co.,Ltd. Address before: 311100 Room 302, unit 2, building 10, huabaimeishe, Xingzhou garden, Xihu District, Hangzhou City, Zhejiang Province Patentee before: Wu Jia |
|
| TR01 | Transfer of patent right |