CN214829674U

CN214829674U - High COD high ammonia nitrogen desulfurization effluent disposal system

Info

Publication number: CN214829674U
Application number: CN202022411566.7U
Authority: CN
Inventors: 赵亮; 郭常慧
Original assignee: Hebei Yuejing Environmental Protection Technology Co ltd
Current assignee: Hebei Yuejing Environmental Protection Technology Co ltd
Priority date: 2020-10-27
Filing date: 2020-10-27
Publication date: 2021-11-23
Anticipated expiration: 2030-10-27

Abstract

The utility model discloses a high COD high ammonia nitrogen desulfurization effluent disposal system, including the aeration equalizing basin, the aeration equalizing basin is connected with a flocculation and precipitation pond, a flocculation and precipitation pond is connected with storage mud pond and middle pond No. one, a middle pond is connected with ammonia distillation tower and air-blower, ammonia distillation tower is connected with condenser and aeration and promotes the pond, the condenser is connected with cooling tower, cooling water pond, catch water and spray column. A high COD high ammonia nitrogen desulfurization effluent disposal system, reach the purpose of getting rid of high COD and high ammonia nitrogen, finally through low cost, the principle of simple flow reaches desulfurization effluent disposal purpose, makes the play water reach the emission requirement, high concentration ammonia nitrogen in this type of waste water is inorganic ammonia, the method that accessible steam blows off is high-efficient to be got rid of, can recycle denitration system after the ammonia recovery, realizes the resourceful retrieval and utilization, brings better use prospect.

Description

High COD high ammonia nitrogen desulfurization effluent disposal system

Technical Field

The utility model relates to a sewage treatment field, in particular to high COD high ammonia nitrogen desulfurization effluent disposal system.

Background

The high COD high ammonia nitrogen desulfurization waste water treatment system is a supporting device for waste water treatment, the waste water in the flue gas desulfurization and denitration process has the water quality characteristics that the salt content of C in the desulfurization waste water is high, the main cation is sodium ion, the content is extremely high, and simultaneously, a large amount of S2-, S2O 32-and SO 42-anions are contained; therefore, the COD content is also higher and reaches 2000-5000 mg/L; the content of suspended matters is high, which proves that the suspended matters in the desulfurization wastewater are mainly ash washing particles, silicon dioxide and hydroxides of iron and aluminum; as the ammonia process is adopted for denitration, the concentration of ammonia nitrogen in the wastewater is high and reaches 8000- & gt 16000mg/L, therefore, the desulfurization and denitration wastewater must meet the standard and be discharged or recycled after necessary treatment, aiming at the treatment method of the wastewater, a chemical precipitation method is adopted, the main process equipment for removing suspended substances and metal ions in the wastewater through the steps of neutralization, coagulation and precipitation is a process flow of 'triple box + clarification', and the process can not meet the final discharge requirement; the evaporation and crystallization process adopts an evaporator and salt crystallization equipment for treatment, so that the treatment cost is high; the 'multistage filtration + reverse osmosis' technology reaches the demineralized water that can recycle through membrane concentration, and the shortcoming can produce the strong brine and need further processing, and along with the continuous development of science and technology, people also are more and more high to the manufacturing process requirement of high COD high ammonia nitrogen desulfurization waste water treatment system.

The existing high-COD high-ammonia nitrogen desulfurization wastewater treatment system has certain defects when in use, the process cannot meet the final emission requirement, the treatment cost is high, strong brine is generated to be further treated, the use of people is not facilitated, certain adverse effects are brought to the use process of people, and therefore the high-COD high-ammonia nitrogen desulfurization wastewater treatment system is provided.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The be not enough to prior art, the utility model provides a high COD high ammonia nitrogen desulfurization effluent disposal system reaches the purpose of getting rid of high COD and high ammonia nitrogen, finally through low cost, the principle of simple flow reaches desulfurization effluent disposal purpose, make the play water reach the emission requirement, the high concentration ammonia nitrogen in this kind of waste water is inorganic ammonia, the method that accessible steam blows off is high-efficient to be got rid of, can recycle denitration system after the ammonia is retrieved, realize the resourceful retrieval and utilization, can effectively solve the problem in the background art.

(II) technical scheme

In order to achieve the above purpose, the utility model adopts the following technical scheme: a high COD high ammonia nitrogen desulfurization wastewater treatment system, which comprises an aeration adjusting tank, wherein the aeration adjusting tank is connected with a first flocculation sedimentation tank, the first flocculation sedimentation tank is connected with a sludge storage tank and a first intermediate water tank, the first intermediate water tank is connected with an ammonia still and an air blower, the ammonia still is connected with a condenser and an aeration lifting pool, the condenser is connected with a cooling tower, a cooling water pool, a steam-water separator and a spray tower, the sludge storage tank is connected with a sludge conditioning tank, the sludge conditioning tank is connected with a plate-and-frame filter press, the aeration lifting tank is connected with an oxidation tank, the oxidation pond is connected with a second flocculation sedimentation pond which is connected with a second intermediate water pond, no. two intermediate water ponds are connected with and remove ammonia pond and No. three flocculation and precipitation ponds, No. three flocculation and precipitation ponds are connected with the deoxidation pond, the deoxidation pond is connected with the clean water basin.

Preferably, a liquid medicine pipeline is arranged among the ammonia still, the condenser, the steam-water separator and the spray tower, and the ammonia still, the condenser, the steam-water separator and the spray tower are connected through the liquid medicine pipeline.

Preferably, a water outlet pump and a wastewater pipeline are arranged between the ammonia still and the aeration lifting pond, and the ammonia still is connected through the water outlet pump and the wastewater pipeline.

Preferably, be provided with the waste water pipeline between clean water basin, deoxidation pond, No. three flocculation and precipitation ponds, remove ammonia pond, No. two middle ponds, No. two flocculation and precipitation ponds, oxidation pond, the aeration lifting pond, connect through the waste water pipeline between clean water basin, deoxidation pond, No. three flocculation and precipitation ponds, remove ammonia pond, No. two middle ponds, No. two flocculation and precipitation ponds, oxidation pond, the aeration lifting pond.

Preferably, be provided with the mud pipeline between a flocculation and precipitation pond, storage mud pond, mud conditioning tank, No. three flocculation and precipitation ponds, No. two flocculation and precipitation ponds, connect through the mud pipeline between a flocculation and precipitation pond, storage mud pond, mud conditioning tank, No. three flocculation and precipitation ponds, No. two flocculation and precipitation ponds.

Preferably, a gas pipeline is arranged among the first middle water tank, the blower and the deoxidizing tank, and the first middle water tank, the blower and the deoxidizing tank are connected through the gas pipeline.

(III) advantageous effects

Compared with the prior art, the utility model provides a high COD high ammonia nitrogen desulfurization effluent disposal system possesses following beneficial effect: the high-COD high-ammonia nitrogen desulfurization wastewater treatment system achieves the aim of removing high COD and high ammonia nitrogen, finally achieves the aim of desulfurization wastewater treatment by the principle of low cost and simple process, so that the effluent meets the discharge requirement, the high-concentration ammonia nitrogen in the wastewater is inorganic ammonia and can be efficiently removed by a steam stripping method, the ammonia gas can be recycled to a denitrification system after being recovered, so that resource recycling is realized, the high-concentration COD needs to be treated by methods such as advanced oxidation, absorption and the like, the COD of the influent water of the desulfurization and denitrification wastewater reaches 4000mg/L and the highest concentration of the ammonia nitrogen is 16500mg/L, the COD reaches 150mg/L by an ammonia still and advanced oxidation treatment process, the ammonia nitrogen concentration reaches 20mg/L, the effluent is clear, the discharge requirement is met, the recycled ammonia water is returned to the denitrification system, the aims of recycling, cost minimization and benefit maximization are achieved, the whole high COD high ammonia nitrogen desulfurization wastewater treatment system is simple in structure, convenient to operate and better in use effect compared with the traditional mode.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a high COD high ammonia nitrogen desulfurization wastewater treatment system.

Figure 2 is the utility model relates to a structural schematic diagram of a plate-and-frame filter press in a high COD high ammonia nitrogen desulfurization wastewater treatment system.

FIG. 3 is a schematic diagram of the flocculation precipitation sampling structure in the high COD high ammonia nitrogen desulfurization wastewater treatment system of the utility model.

Figure 4 is the utility model discloses a spray cooling's schematic structure among high COD high ammonia nitrogen desulfurization effluent disposal system.

In the figure: 1. an aeration adjusting tank; 2. a first flocculation sedimentation tank; 3. a first intermediate pool; 4. an ammonia still; 5. a cooling tower; 6. a cooling water pool; 7. a condenser; 8. a steam-water separator; 9. a spray tower; 10. a blower; 11. a plate-and-frame filter press; 12. a sludge conditioning tank; 13. a mud storage pool; 14. a clean water tank; 15. a deoxidation tank; 16. a third flocculation sedimentation tank; 17. an ammonia removal tank; 18. a second intermediate pool; 19. a second flocculation sedimentation tank; 20. an oxidation pond; 21. an aeration lifting pool.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

As shown in figures 1-4, a high COD high ammonia nitrogen desulfurization wastewater treatment system comprises an aeration adjusting tank 1, wherein the aeration adjusting tank 1 is connected with a first flocculation sedimentation tank 2, the first flocculation sedimentation tank 2 is connected with a sludge storage tank 13 and a first intermediate water tank 3, the first intermediate water tank 3 is connected with an ammonia still 4 and an air blower 10, the ammonia still 4 is connected with a condenser 7 and an aeration lifting tank 21, the condenser 7 is connected with a cooling tower 5, a cooling water tank 6, a steam-water separator 8 and a spray tower 9, the sludge storage tank 13 is connected with a sludge conditioning tank 12, the sludge conditioning tank 12 is connected with a plate-and-frame filter press 11, the aeration lifting tank 21 is connected with an oxidation tank 20, the oxidation tank 20 is connected with a second flocculation sedimentation tank 19, the second flocculation sedimentation tank 19 is connected with a second intermediate water tank 18, the second intermediate water tank 18 is connected with an ammonia removal tank 17 and a third flocculation sedimentation tank 16, the third flocculation sedimentation tank 16 is connected with a deoxidation tank 15, the deoxidation tank 15 is connected with a clean water tank 14.

Furthermore, a liquid medicine pipeline is arranged among the ammonia still 4, the condenser 7, the steam-water separator 8 and the spray tower 9, and the ammonia still 4, the condenser 7, the steam-water separator 8 and the spray tower 9 are connected through the liquid medicine pipeline, so that the medicine adding operation is convenient.

Further, a water outlet pump and a waste water pipeline are arranged between the ammonia still 4 and the aeration lifting pond 21, and the ammonia still 4 is connected through the water outlet pump and the waste water pipeline, so that sludge treatment is facilitated.

Further, wastewater pipelines are arranged among the clean water tank 14, the deoxidizing tank 15, the third flocculating and settling tank 16, the ammonia removing tank 17, the second intermediate water tank 18, the second flocculating and settling tank 19, the oxidation tank 20 and the aeration lifting tank 21, and the clean water tank 14, the deoxidizing tank 15, the third flocculating and settling tank 16, the ammonia removing tank 17, the second intermediate water tank 18, the second flocculating and settling tank 19, the oxidation tank 20 and the aeration lifting tank 21 are connected through the wastewater pipelines, so that the wastewater treatment effect is improved.

Further, be provided with the mud pipeline between a flocculation and precipitation pond 2, store up mud pond 13, mud and take care of jar 12, No. three flocculation and precipitation ponds 16, No. two flocculation and precipitation ponds 19, connect through the mud pipeline between a flocculation and precipitation pond 2, store up mud pond 13, mud and take care of jar 12, No. three flocculation and precipitation ponds 16, No. two flocculation and precipitation ponds 19, conveniently carry out the circulation of mud, the clearance of being convenient for.

Furthermore, a gas pipeline is arranged among the first middle water tank 3, the blower 10 and the deoxidizing tank 15, and the first middle water tank 3, the blower 10 and the deoxidizing tank 15 are connected through the gas pipeline, so that internal ventilation and gas emission are facilitated.

The working principle is as follows: the utility model comprises an aeration adjusting tank 1, a flocculation sedimentation tank 2, a middle water tank 3, an ammonia still 4, a cooling tower 5, a cooling water tank 6, a condenser 7, a steam-water separator 8, a spray tower 9, a blower 10, a plate and frame filter press 11, a sludge conditioning tank 12, a sludge storage tank 13, a clear water tank 14, a deoxidizing tank 15, a third flocculation sedimentation tank 16, an ammonia removal tank 17, a second middle water tank 18, a second flocculation sedimentation tank 19, an oxidation tank 20, an aeration lifting tank 21, the concrete flow is desulfurization waste water, aeration adjustment, flocculation sedimentation, the middle water tank, the ammonia still 4, aeration lifting, advanced oxidation, flocculation sedimentation, water outlet, the industrial waste water is firstly collected by a sewage pipeline and enters the adjusting tank, a fan blast water quality is arranged in the adjusting tank, mixed aeration, the water quantity is adjusted, the flocculation sedimentation tank is lifted by a lifting pump, most of suspended matters in the waste water are removed in the coagulation sedimentation tank, simultaneously adding lime water or NaOH to adjust the pH value of raw water to be slightly alkaline, simultaneously reacting with sulfate and carbonate in the raw water, and metal cations such as copper, iron and the like to generate precipitates, adding PAC and PAM into a flocculation reaction tank, fully separating mud and water in an inclined tube sedimentation tank after reaction, then automatically flowing the sewage into an intermediate water tank, adjusting the pH value to be about 9-11, lifting the sewage into an ammonia still 4 through a lifting pump, removing most ammonia nitrogen, and removing inorganic ammonia due to the fact that free ammonia is stripped and removed under the heated condition, the method comprises the following steps: the sewage in the middle pool enters a stripping and ammonia-removing tower 4 after heat exchange between a preheater and the effluent of a tower kettle, after alkaline adjustment, ammonia nitrogen in ammonia-containing wastewater is converted into ammonia gas for removal, the ammonia-removing wastewater reaches the bottom of the tower and is discharged outside after heat exchange between the preheater and influent water through a water pump at the bottom of the tower, high-concentration ammonia-containing gas enriched at the top of the tower enters an ammonia gas condenser, ammonia gas is condensed and recovered to be more than or equal to 15 percent of ammonia water, tail gas reaches the standard for discharge, then the sewage enters an aeration lifting pool 21 for further stirring, dilute sulfuric acid is added into the lifting pool, the PH value is adjusted to be 3-5, the sewage enters a high-grade oxidation pool 20 for lifting, hydrogen peroxide and ferrous sulfate are added into the pool, the formed Fenton reaction can be oxidized to remove COD, powdered activated carbon is added for catalytic adsorption treatment if necessary, the sewage enters a PH readjustment pool after oxidation to be 6-7, then the flocculation sedimentation pool is used for mud-water separation, finally clear water is collected and enters a clear water pool 14, the effluent can be recycled and discharged after reaching the standard.

It is noted that, herein, relational terms such as first and second (a, b, etc.) and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a high COD high ammonia nitrogen desulfurization effluent disposal system, includes aeration equalizing basin (1), its characterized in that: the aeration adjusting tank (1) is connected with a first flocculation sedimentation tank (2), the first flocculation sedimentation tank (2) is connected with a sludge storage tank (13) and a first intermediate water tank (3), the first intermediate water tank (3) is connected with an ammonia still (4) and an air blower (10), the ammonia still (4) is connected with a condenser (7) and an aeration lifting tank (21), the condenser (7) is connected with a cooling tower (5), a cooling water tank (6), a steam-water separator (8) and a spray tower (9), the sludge storage tank (13) is connected with a sludge conditioning tank (12), the sludge conditioning tank (12) is connected with a plate and frame filter press (11), the aeration lifting tank (21) is connected with an oxidation tank (20), the oxidation tank (20) is connected with a second flocculation sedimentation tank (19), the second flocculation sedimentation tank (19) is connected with a second intermediate water tank (18), no. two middle ponds (18) are connected with remove ammonia pond (17) and No. three flocculation and precipitation ponds (16), No. three flocculation and precipitation ponds (16) are connected with deoxidation pond (15), deoxidation pond (15) are connected with clean water basin (14).

2. The high COD high ammonia nitrogen desulfurization waste water treatment system of claim 1, characterized in that: and liquid medicine pipelines are arranged among the ammonia still (4), the condenser (7), the steam-water separator (8) and the spray tower (9), and the ammonia still (4), the condenser (7), the steam-water separator (8) and the spray tower (9) are connected through the liquid medicine pipelines.

3. The high COD high ammonia nitrogen desulfurization waste water treatment system of claim 1, characterized in that: a water outlet pump and a waste water pipeline are arranged between the ammonia still (4) and the aeration lifting pond (21), and the ammonia still (4) is connected through the water outlet pump and the waste water pipeline.

4. The high COD high ammonia nitrogen desulfurization waste water treatment system of claim 1, characterized in that: the sewage treatment device is characterized in that waste water pipelines are arranged among a clean water tank (14), a deoxidizing tank (15), a third flocculation sedimentation tank (16), an ammonia removal tank (17), a second middle water tank (18), a second flocculation sedimentation tank (19), an oxidation tank (20) and an aeration lifting tank (21), and the clean water tank (14), the deoxidizing tank (15), the third flocculation sedimentation tank (16), the ammonia removal tank (17), the second middle water tank (18), the second flocculation sedimentation tank (19), the oxidation tank (20) and the aeration lifting tank (21) are connected through the waste water pipelines.

5. The high COD high ammonia nitrogen desulfurization waste water treatment system of claim 1, characterized in that: a sludge pipeline is arranged between the first flocculation sedimentation tank (2), the sludge storage tank (13), the sludge conditioning tank (12), the third flocculation sedimentation tank (16) and the second flocculation sedimentation tank (19), and the first flocculation sedimentation tank (2), the sludge storage tank (13), the sludge conditioning tank (12), the third flocculation sedimentation tank (16) and the second flocculation sedimentation tank (19) are connected through the sludge pipeline.

6. The high COD high ammonia nitrogen desulfurization waste water treatment system of claim 1, characterized in that: a gas pipeline is arranged among the first middle water tank (3), the air blower (10) and the deoxidizing tank (15), and the first middle water tank (3), the air blower (10) and the deoxidizing tank (15) are connected through the gas pipeline.