CN214192753U - Novel integrated equipment for extracting salt from concentrated solution of desulfurization wastewater - Google Patents
Novel integrated equipment for extracting salt from concentrated solution of desulfurization wastewater Download PDFInfo
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- CN214192753U CN214192753U CN202022298502.0U CN202022298502U CN214192753U CN 214192753 U CN214192753 U CN 214192753U CN 202022298502 U CN202022298502 U CN 202022298502U CN 214192753 U CN214192753 U CN 214192753U
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Abstract
The utility model discloses a novel salt equipment is drawed to integration desulfurization waste water concentrate, including the waste water tank, the swirler, vacuum disc hydroextractor, catch water, the waste water tank is connected with the charge pump, and the waste water pump in the charge pump with the waste water tank goes into the swirler, and concentrated solution after the swirler is concentrated gets into the vacuum disc hydroextractor, vacuum disc hydroextractor intercommunication catch water and vacuum pump, under the effect of vacuum pump, the inside formation vacuum of vacuum disc hydroextractor, adsorb the crystalline salt that proportion is big on the disc of disc hydroextractor, the crystalline salt on the disc is through the blowback discharge disc hydroextractor of air compression jar. This novel integration desulfurization waste water concentrate draws salt equipment with the concentrated section of desulfurization waste water, draw the salt section separately, enlarge the shower nozzle, let desulfurization waste water only accomplish in the flue concentrated, avoid matters such as aquatic calcium, magnesium to locate the scale deposit at the shower nozzle, the separation of suspended solid, crystallization salt adopts outside the flue equipment separates.
Description
Technical Field
The utility model belongs to the technical field of desulfurization waste water treatment, concretely relates to novel salt equipment is drawed to integration desulfurization waste water concentrate.
Background
With the vigorous popularization of the national environmental protection policy, the requirement on the salt content of the industrial effluent is more and more strict, and the zero emission of the desulfurization wastewater is required to be realized, so that the desulfurization wastewater must be subjected to the removal of suspended matters and salt, namely, the salt is extracted. The desulfurization waste water produced by the wet flue gas desulfurization process in modern industry has a pH value of 4-6, and simultaneously contains a large amount of suspended substances and soluble salts, such as gypsum particles, Na2SO4, NaCl and the like. At present, the desulfurization wastewater zero-discharge technology mainly comprises two methods, wherein the first method is a full-membrane method, namely pretreatment, membrane concentration and MVR, the desulfurization wastewater is concentrated by using ultrafiltration, reverse osmosis and high-pressure reverse osmosis, salt extraction of a concentrated solution is realized by using MVR, but the MVR has high energy consumption and higher requirement on hardness; the second method is that the desulfurization waste water is directly sprayed to the flue containing high-temperature flue gas, water is directly evaporated, suspended matters and crystallized salt in the waste water are deposited to the bottom of the flue and are captured and separated by a dust remover, the desulfurization waste water is synchronously concentrated and separated in the flue, but a fine spray nozzle is adopted, and the desulfurization waste water contains a large amount of calcium and magnesium, so that scaling is easily formed at the nozzle to cause blockage.
In order to solve the problems that the prior desulfurization wastewater zero-discharge technology has high MVR energy consumption and high hardness requirement by a full-membrane method, wastes human resources and improves the cost of wastewater treatment; the flue spray crystallization method needs to adopt a fine spray nozzle, and the desulfurization wastewater contains a large amount of calcium and magnesium, so that scaling is very easy to form at the nozzle to cause the problems of blockage and the like, thereby providing novel integrated desulfurization wastewater concentrated solution salt extraction equipment.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems existing in the prior art, and the prior desulfurization wastewater zero-discharge technology has high MVR energy consumption by a full-membrane method and high hardness requirement; the flue spray crystallization method needs to adopt a fine spray nozzle, and because the desulfurization wastewater contains a large amount of calcium and magnesium, the desulfurization wastewater is easy to scale at the nozzle to cause blockage, so that the novel integrated desulfurization wastewater concentrated solution salt extraction equipment is provided. A novel integration desulfurization waste water concentrate extract salt equipment, can realize the separation of salt in the concentrate with lower energy consumption, can part the concentrated section of desulfurization waste water, extract the salt section, enlarge the shower nozzle, let desulfurization waste water only accomplish in the flue and concentrate, avoid material such as aquatic calcium, magnesium to locate the scale deposit at the shower nozzle, the separation of suspended solid, crystallization salt adopts outside the flue equipment separates.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a novel salt equipment is drawed to integration desulfurization waste water concentrate, includes waste water tank, swirler, vacuum disc hydroextractor, catch water, its characterized in that: the waste water tank is connected with the feed pump, the feed pump pumps the waste water in the waste water tank into the swirler, the concentrated solution after the concentration of the swirler enters the vacuum disc dehydrator, the vacuum disc dehydrator is communicated with the steam-water separator and the vacuum pump, under the action of the vacuum pump, vacuum is formed inside the vacuum disc dehydrator, the crystallized salt with large specific gravity is adsorbed on the disc sheet of the vacuum disc dehydrator, and the crystallized salt on the disc sheet is discharged out of the vacuum disc dehydrator through the back blowing of the air compression tank.
Preferably, the wastewater tank is connected with a desulfurization wastewater concentration system at the front end to form a circulating treatment system, and the solid content of the desulfurization wastewater concentrate in the wastewater tank is kept to be more than or equal to 8%.
Preferably, the feeding pump is a corrosion-resistant centrifugal slurry conveying pump, and the outlet pressure of the corrosion-resistant centrifugal slurry conveying pump is greater than the inlet feeding pressure of the cyclone.
Preferably, the swirler is a metal shell lining composite ceramic double-shell structure, the surface of the composite ceramic is provided with a spiral material channel, the supernatant liquid spirals upwards, and the crystallized salt spirals downwards.
Preferably, the vacuum disc dehydrator is provided with a disc, a limit switch and a lower liquid outlet, the disc is composed of a disc sheet and a sector plate, the sector plate is a filter cloth type hollow polypropylene sector plate, the filter cloth specification is 500 plus 600 g/square meter, the limit switch is arranged in the center of the disc, and the rotating speed of the disc is controlled in a frequency conversion mode.
Preferably, a back-blowing electromagnetic valve is arranged between the vacuum disc dehydrator and the air compression tank, filter cakes formed by crystallized salt on the discs of the vacuum disc dehydrator are discharged by back-blowing of compressed air, the back-blowing frequency is jointly controlled by a limit switch of the vacuum disc dehydrator and the back-blowing electromagnetic valve, the limit switch can detect when the discs of the vacuum disc dehydrator rotate, and signals can be continuously transmitted to the back-blowing electromagnetic valve when the rotation is detected, so that the back-blowing electromagnetic valve is controlled to be switched on and off.
Preferably, the interior of the steam-water separator is divided into an upper part and a lower part which are respectively connected with the upper liquid discharge electromagnetic valve and the lower liquid discharge electromagnetic valve, the steam-water separator discharges liquid by adopting a mode of combining liquid level and the electromagnetic valves, and the water inlet of the steam-water separator is 500mm lower than the liquid discharge port of the vacuum disc dehydrator.
Preferably, all the devices are integrated in a frame to form an integrated device, and all the parts contacting with the desulfurization waste water are made of corrosion-resistant materials.
Compared with the prior art, the utility model has the technical advantages that:
the utility model provides a novel integrated desulfurization wastewater concentrated solution salt extraction device aiming at the desulfurization wastewater zero-discharge treatment process, and compared with the full-membrane method, the salt in the concentrated solution can be separated with lower energy consumption; compare in flue spray crystallization method, can be with desulfurization waste water's concentrated section, draw the salt section separately, enlarge the shower nozzle, let desulfurization waste water only accomplish concentrated in the flue, avoid materials such as aquatic calcium, magnesium to locate the scale deposit at the shower nozzle, the separation of suspended solid, crystallization salt adopts outside the flue equipment separates.
Drawings
FIG. 1 is a schematic flow chart of the present invention,
figure 2 is a schematic structural view of the present invention,
wherein 1 is the waste water case, 2 is the charge pump, 3 is the swirler, 4 is the vacuum disc hydroextractor, 5 is catch water, 6 is the vacuum pump, 7 is the air compression jar, 8 is the hopper, 9 is upper portion flowing back solenoid valve, 10 is lower part flowing back solenoid valve, 11 is the blowback solenoid valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the drawings of the embodiments of the present invention are combined below to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are only a part of the embodiments of the present invention, not all embodiments. Based on the utility model discloses the embodiment of applying for, to the technical personnel of this field, a plurality of changes and improvements etc. that make, all other embodiments that obtain all belong to the scope of the utility model protection.
With the combination of the flow diagram of fig. 1 and the structure diagram of fig. 2, the utility model provides a novel integrated desulfurization wastewater concentrate salt extraction device, the technical scheme is as follows: a novel integrated desulfurization waste water concentrate salt extraction device comprises a waste water tank 1, a feed pump 2, a cyclone 3, a vacuum disc dehydrator 4, a steam-water separator 5, a vacuum pump 6, an air compression tank 7, a hopper 8, an upper liquid discharge electromagnetic valve 9, a lower liquid discharge electromagnetic valve 10 and a back flushing electromagnetic valve 11.
The utility model provides a novel integration desulfurization waste water concentrate draws salt equipment, including waste water tank 1, swirler 3, vacuum disc hydroextractor 4, catch water 5, waste water tank 1 is connected with charge pump 2, the waste water pump in the feed pump with the waste water tank goes into swirler 3, the concentrated solution after 3 concentrates of swirler gets into vacuum disc hydroextractor 4, vacuum disc hydroextractor 4 intercommunication catch water 5 and vacuum pump 6, under vacuum pump 6's effect, the inside vacuum that forms of vacuum disc hydroextractor 4, crystal salt with big proportion adsorbs on the disc of vacuum disc hydroextractor 4, crystal salt on the disc discharges vacuum disc hydroextractor 4 through the blowback of air compression jar 8.
The structure and the arrangement relation thereof are described in detail in the following with reference to the accompanying drawings: the utility model provides a novel integration desulfurization waste water concentrate salt extraction equipment is provided with and is used for storing the waste water tank 1 of placing desulfurization waste water, and waste water tank 1 is connected with the desulfurization waste water concentration system of front end, forms circulation processing system, keeps the solid content of desulfurization waste water concentrate in waste water tank 1 to be greater than or equal to 8%. And waste water tank 1 is being connected charge pump 2 to charge pump 2 is corrosion-resistant centrifugal thick liquid delivery pump, can guarantee that equipment normal work after a period, can not make charge pump 2 receive the corruption because of the contact with desulfurization waste water for a long time, influences the normal continuous operation of equipment. And the feed pump 2, the lift of corrosion-resistant centrifugal thick liquid delivery pump is high for corrosion-resistant centrifugal thick liquid delivery pump export pressure is greater than 3 import feed pressure 0.1Mpa of swirler, guarantees that desulfurization waste water from waste water tank 1, through feed pump 2, can enter into swirler 3 with certain pressure.
The feed pump 2 is connected with the cyclone 3, the upper water outlet of the cyclone 3 is connected with the waste water tank 1, and the lower water outlet of the cyclone 3 is connected with the vacuum disc dehydrator 4. The desulfurization waste water from the waste water tank 1 through the feed pump 2 is further concentrated through the cyclone 3, so that the salt content of the generated desulfurization waste water containing crystal salt is increased to 20-30%. And the swirler 3 is a metal shell lining composite ceramic double-shell structure, the surface of the composite ceramic is provided with a spiral material channel, after the desulfurization wastewater concentrated solution is concentrated by the swirler 3, the supernatant fluid spirally upwards flows back to the wastewater tank 1 from the upper outlet of the swirler 3, the crystallized salt spirally downwards enters the vacuum disc dehydrator 4 from the lower outlet of the swirler 3 to extract the salt, and the purpose of material concentration is realized.
The vacuum disc dehydrator 4 is connected with the hopper 8, and a blowback electromagnetic valve 11 is arranged between the vacuum disc dehydrator 4 and the air compression tank 7. The vacuum disc dehydrator 4 is made of corrosion-resistant materials, so that after the equipment normally works for a period of time, the vacuum disc dehydrator 4 is prevented from being corroded due to the fact that the vacuum disc dehydrator 4 is in contact with desulfurization wastewater for a long time, and continuous work of the equipment is not affected. The vacuum disc dehydrator 4 is provided with a disc, a limit switch and a lower liquid outlet, the disc is composed of a disc sheet and a fan-shaped plate, the limit switch is arranged at the center of the disc, and the rotating speed of the disc is controlled in a variable frequency mode. That is, the rotating speed of the vacuum disc dehydrator 4 is controlled by frequency conversion, the thickness of the crystal salt separated from the disc is related to the rotating speed of the disc of the vacuum disc dehydrator 4, the thickness of the filter cake formed by the crystal salt is controlled to be more than 1cm, if the thickness of the filter cake cannot be achieved, the vacuum state in the vacuum disc dehydrator 4 is easily destroyed, and at the moment, the rotating speed of the disc can be controlled by frequency modulation, so that the filter cake can reach a certain thickness. The sector plate of the vacuum disc dehydrator 4 is a hollow polypropylene sector plate, and the filter cloth specification is 500-function 600 g/square meter. The filter cake formed by crystallized salt on the disc of the vacuum disc dehydrator 4 is discharged by compressed air reverse blowing, the frequency of the reverse blowing is controlled by a limit switch and a normally closed reverse blowing electromagnetic valve 11 in a combined way, the limit switch can detect when the disc of the vacuum disc dehydrator 4 rotates, and the rotation is detected, so that a signal can be continuously transmitted to the reverse blowing electromagnetic valve 11 to control the switch of the reverse blowing electromagnetic valve 11. Vacuum is formed in the vacuum disc dehydrator 4 under the action of the vacuum pump 6, the crystallized salt with high specific gravity is adsorbed on the discs of the vacuum disc dehydrator 4, and the crystallized salt on the discs enters the hopper 8 through the back blowing of the air compression tank 7 and is discharged for outward transportation.
The vacuum disc dehydrator 4 is connected to a steam-water separator 5 provided at one side, an upper drain solenoid valve 9 and a lower drain solenoid valve 10 are connected to the upper and lower portions of the steam-water separator 5, respectively, and a vacuum pump 6 is connected to the upper portion of the steam-water separator 5. The water inlet at the upper part of the steam-water separator 5 is 500mm lower than the liquid outlet at the lower part of the vacuum disc dehydrator 4, so that the vacuum disc dehydrator 4 can conveniently extract salt from the concentrated solution to form filtrate, and the filtrate can smoothly enter the steam-water separator 5 from the vacuum disc dehydrator 4. The steam-water separator 5 discharges liquid in a mode of combining liquid level and an electromagnetic valve, the interior of the steam-water separator 5 is divided into an upper part and a lower part, filter liquid firstly enters the upper part of the steam-water separator 5 under the action of a vacuum pump 6, after the liquid level of the filter liquid reaches a set value, an upper liquid discharge electromagnetic valve 9 is opened, the filter liquid enters the lower part from the upper part of the steam-water separator 5, and then the lower liquid discharge electromagnetic valve 10 is opened, so that the discharge of the filter liquid is realized. The upper part of the steam-water separator 5 is connected with a pipeline of the vacuum pump 6, and the height of the pipeline is 1.5-2.0m higher than the interface. The filtrate of the vacuum disc dehydrator 4 enters a steam-water separator 5 under the action of a vacuum pump 6, and flows back to the wastewater tank 1 after steam-water separation.
The novel integrated equipment for extracting the salt from the desulfurization wastewater concentrated solution integrates all equipment into a frame to form integrated equipment. And novel all parts that contact with desulfurization waste water of integration desulfurization waste water concentrate extraction salt equipment all adopt corrosion-resistant material, avoid because equipment and desulfurization waste water contact, long-time work, and make equipment receive the corruption, influence the normal use that lasts of equipment. And the effluent of the steam-water separator 5 and the effluent of the upper part of the cyclone 3 flow back to the wastewater tank 1, the filtrate after salt extraction enters a front-end desulfurization wastewater concentration system for concentration, and forms a circulating treatment system with the desulfurization wastewater concentration system, so that the solid content of the desulfurization wastewater concentrate in the wastewater tank 1 is kept to be more than or equal to 8%.
The utility model discloses it draws salt equipment to provide a novel integration desulfurization waste water concentrate to desulfurization waste water zero release treatment process, can realize the separation of salt in the concentrate with lower energy consumption, can with the concentrated section of desulfurization waste water, draw the salt section separately, enlarge the shower nozzle, let desulfurization waste water only accomplish in the flue and concentrate, avoid materials such as aquatic calcium, magnesium to locate the scale deposit at the shower nozzle, the separation of suspended solid, crystal salt adopts outside the flue equipment separates, realizes desulfurization waste water's zero release.
With reference to the flow diagram of fig. 1, the utility model discloses a work flow as follows: when the novel integrated desulfurization waste water concentrated solution extraction salt equipment normally and continuously works, the desulfurization waste water placed in the waste water tank 1 is conveyed into the swirler 3 under certain pressure through the corrosion-resistant centrifugal slurry conveying pump. The cyclone 3 further concentrates the desulfurization waste water, so that the salt content of the desulfurization waste water is increased to 20-30%, and the dehydration effect is improved. Because swirler 3 is the double-shell structure of metal casing inside lining composite ceramic, there is spiral material passageway on the composite ceramic surface, so desulfurization waste water is realizing the material concentration back through swirler 3, and the supernatant spiral upwards flows back to novel integration desulfurization waste water concentrate and draws salt equipment waste water tank 1 from 3 upper portion exports of swirler, and the salt of crystallization spiral is downward, gets into vacuum disc hydroextractor 4 from 3 lower part exports of swirler and draws salt. Under the action of the vacuum pump 6, the interior of the vacuum disc dehydrator 4 is in a vacuum state, the crystallized salt with large specific gravity is adsorbed on the disc of the vacuum disc dehydrator 4, the crystallized salt on the disc enters the hopper 8 after being subjected to back blowing of the air compression tank 7, the crystallized salt is discharged and transported outside, and the water content of the crystallized salt is 40% -50%. The filter plate of the vacuum disc dehydrator 4 is a hollow polypropylene fan-shaped plate, the specification of the filter cloth is 500-function water of 600 g/square meter, and the water content of the separated crystalline salt is 40-50%. The filtrate formed after the salt is extracted from the concentrated solution of the vacuum disc dehydrator 4 enters the steam-water separator 5 under the action of the vacuum pump 6. The steam-water separator 5 discharges liquid in a mode of combining liquid level and an electromagnetic valve, the interior of the steam-water separator 5 is divided into an upper part and a lower part, filter liquid firstly enters the upper part of the steam-water separator 5 under the action of a vacuum pump 6, after the liquid level reaches a set value, an upper liquid discharging electromagnetic valve 9 is opened, the filter liquid enters the lower part from the upper part of the steam-water separator 5, and then the lower liquid discharging electromagnetic valve 10 is opened, so that the discharge of the filter liquid is realized. After passing through the steam-water separator 5, the filtrate flows back to the wastewater tank 1. The filtrate after salt extraction enters a desulfurization wastewater concentration system at the front end of the equipment for concentration, and forms a circulating treatment system with the desulfurization wastewater concentration system, so that the solid content of the desulfurization wastewater concentrate in the wastewater tank 1 is kept to be more than or equal to 8%.
The above description of the present invention is only the preferred embodiments shown in the attached drawings, but not intended to limit the scope of the present invention, and it should be noted that, for those skilled in the art, those skilled in the art should not pay any modification, equivalent replacement, improvement, etc. made by creative work without departing from the overall concept of the present invention, and these should be all included in the scope of the present invention.
Claims (8)
1. The utility model provides a novel salt equipment is drawed to integration desulfurization waste water concentrate, includes waste water tank (1), swirler (3), vacuum disc hydroextractor (4), catch water (5), its characterized in that: waste water tank (1) is connected with charge pump (2), charge pump (2) are with waste water pump income swirler (3) in waste water tank (1), concentrated solution after swirler (3) concentration gets into vacuum disc hydroextractor (4), vacuum disc hydroextractor (4) intercommunication catch water (5) and vacuum pump (6), under the effect of vacuum pump (6), the inside vacuum that forms of vacuum disc hydroextractor (4), adsorb the crystalline salt that proportion is big on the disc of vacuum disc hydroextractor (4), crystalline salt on the disc discharges vacuum disc hydroextractor (4) through the blowback of air compression jar (7).
2. The novel integrated desulfurization wastewater concentrate salt extraction equipment according to claim 1, characterized in that: the waste water tank (1) is connected with a desulfurization waste water concentration system at the front end to form a circulating treatment system, and the solid content of the desulfurization waste water concentrate in the waste water tank (1) is kept to be more than or equal to 8%.
3. The novel integrated desulfurization wastewater concentrate salt extraction equipment according to claim 1, characterized in that: the feeding pump (2) is a corrosion-resistant centrifugal slurry conveying pump, and the outlet pressure of the corrosion-resistant centrifugal slurry conveying pump is greater than the inlet feeding pressure of the cyclone (3).
4. The novel integrated desulfurization wastewater concentrate salt extraction equipment according to claim 1, characterized in that: the cyclone (3) is of a metal shell lining composite ceramic double-shell structure, the surface of the composite ceramic is provided with a spiral material channel, the supernatant liquid spirals upwards, and the crystallized salt spirals downwards.
5. The novel integrated desulfurization wastewater concentrate salt extraction equipment according to claim 1, characterized in that: the vacuum disc dehydrator (4) is provided with a disc, a limit switch and a lower liquid outlet, the disc is composed of a disc sheet and a sector plate, the sector plate is a filter cloth type hollow polypropylene sector plate, the filter cloth specification is 500 plus 600 g/square meter, the limit switch is arranged in the center of the disc, and the rotating speed of the disc is controlled in a frequency conversion mode.
6. The novel integrated desulfurization wastewater concentrate salt extraction equipment according to claim 5, characterized in that: vacuum disc hydroextractor (4) and air compression jar (7) between be provided with blowback solenoid valve (11), the filter cake that is formed by the crystalline salt on vacuum disc hydroextractor (4) disc adopts the compressed air blowback to unload and falls, the frequency of blowback is by limit switch and blowback solenoid valve (11) joint control of vacuum disc hydroextractor (4), limit switch can be surveyed when the disc of vacuum disc hydroextractor (4) rotates, can give blowback solenoid valve (11) signal transmission in succession when detecting the rotation, control blowback solenoid valve (11) switch.
7. The novel integrated desulfurization wastewater concentrate salt extraction equipment according to claim 1, characterized in that: the inside of the steam-water separator (5) is divided into an upper part and a lower part which are respectively connected with an upper liquid discharge electromagnetic valve (9) and a lower liquid discharge electromagnetic valve (10), the steam-water separator (5) discharges liquid by adopting a mode of combining liquid level and the electromagnetic valves, and the water inlet of the steam-water separator (5) is 500mm lower than the liquid discharge port of the vacuum disc dehydrator (4).
8. The novel integrated desulfurization wastewater concentrate salt extraction equipment according to claim 1, characterized in that: all the devices are integrated in one frame to form integrated devices, and all the parts in contact with the desulfurization waste water are made of corrosion-resistant materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022298502.0U CN214192753U (en) | 2020-10-15 | 2020-10-15 | Novel integrated equipment for extracting salt from concentrated solution of desulfurization wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022298502.0U CN214192753U (en) | 2020-10-15 | 2020-10-15 | Novel integrated equipment for extracting salt from concentrated solution of desulfurization wastewater |
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| Publication Number | Publication Date |
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| CN214192753U true CN214192753U (en) | 2021-09-14 |
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| CN202022298502.0U Active CN214192753U (en) | 2020-10-15 | 2020-10-15 | Novel integrated equipment for extracting salt from concentrated solution of desulfurization wastewater |
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| CN (1) | CN214192753U (en) |
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