CN218834110U

CN218834110U - Biological filter for deodorization of kitchen workshop

Info

Publication number: CN218834110U
Application number: CN202223237788.7U
Authority: CN
Inventors: 康科学; 耿丙惠; 杨柳
Original assignee: Hubei Guoxin Tianhui Energy Co ltd
Current assignee: Hubei Guoxin Tianhui Energy Co ltd
Priority date: 2022-11-29
Filing date: 2022-11-29
Publication date: 2023-04-11
Anticipated expiration: 2032-11-29

Abstract

The utility model relates to a deodorization technical field discloses a kitchen workshop is biological filter for deodorization, including biological filter, biological filter is including mixing section and bio-drip filter section, it is equipped with low concentration foul smell entry and high concentration foul smell entry to mix the section top, high concentration foul smell entry linkage has the spray column, the spray column upper end is connected mix the section upper end, be provided with gas outlet on the biological filter. The utility model has the advantages of it is following and effect: mixing and homogenizing the odor in the mixing section to keep the odor concentration in the mixing section within a certain range, so as to avoid overlarge odor concentration fluctuation entering the biological trickling filtration section and keep the stability of the biological trickling filtration section; the odor from different sources can be treated according to concentration, the load of the spray tower can be reduced, the air quantity entering the spray tower is small, the high-concentration odor can be treated more thoroughly, and the medicament is saved.

Description

Biological filter for deodorization of kitchen workshop

Technical Field

The utility model relates to a deodorization technical field, in particular to biological filter is used in kitchen workshop deodorization.

Background

The kitchen waste has the characteristics of high water content, high salt content, more organic components, less harmful components and the like, can be rapidly degraded by microorganisms in the collection, transportation and treatment processes to generate pollution, wherein malodorous substances such as ammonia, hydrogen sulfide and the like can cause inappetence, dizziness and vomiting of people, directly harm respiratory tracts, endocrine systems, circulating systems and nervous systems, and seriously affect the health and safety of the public. The main ingredients of the malodorous substances generated in the kitchen waste deodorization treatment process are sulfur compounds, nitrogen compounds, hydrocarbon compounds and oxygen organic substances, and the main deodorization process is widely adopted for the odors generated in the kitchen waste treatment process at present: acid cleaning tower, alkaline cleaning tower and biological filter to reach GB14554-93 odor emission standard.

The Chinese utility model patent with the publication number of CN209020161U discloses an odor treatment system for kitchen waste treatment engineering, which comprises a first washing tower, a biological filter, a low-temperature plasma device, a time-delay oxidation tower and a chimney which are connected in sequence; the tower body of the first washing tower is divided by a partition plate to form an acid treatment area, an alkali treatment area, a first liquid storage area and a second liquid storage area which are arranged from top to bottom, a first gas collection area, a first spray pipe, a first filler and a first gas distribution area are arranged from top to bottom in the acid treatment area, a second gas collection area, a second spray pipe, a second filler and a second gas distribution area are arranged from top to bottom in the alkali treatment area, the first spray pipe is connected with the first liquid storage area through a pipeline and a delivery pump, the second spray pipe is connected with the second liquid storage area through a pipeline and a delivery pump, and the second gas collection area is connected with the first gas distribution area through a pipeline and a draught fan.

The system integrates physical, chemical, biological and ion deodorization methods, performs targeted treatment on the mixed gas odor source, but the system does not perform grading treatment on the odor concentration, the load of the first washing tower is large, the system is easy to be unstable, the odor is easy to treat incompletely, a large amount of medicaments are consumed, and the deodorization cost is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a kitchen workshop is biological filter for deodorization has the effect that the deodorization is stable, the load is less, practice thrift the medicament.

The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides a kitchen workshop is biological filter for deodorization, includes biological filter, biological filter is including mixing section and bio-drip filter section, it is equipped with low concentration foul smell entry and high concentration foul smell entry to mix the section top, high concentration foul smell entry linkage has the spray column, the spray column upper end is connected mix the section upper end, be provided with the gas outlet on the biological filter.

By adopting the technical scheme, the odor of the kitchen pretreatment workshop and the homogenizing tank enters respective fans through pipelines, and the low-concentration odor with the concentration of 25000m & lt 3 & gt/h directly enters a mixing section of the biological filter; the high-concentration odor with the concentration of 8000m & lt 3 & gt/h enters a spray tower to be treated and then enters a mixing section of the biological filter, and the high-concentration odor and the low-concentration odor are mixed and homogenized in the mixing section, so that the odor concentration of the mixing section is kept within a certain range, the excessive fluctuation of the odor concentration entering the biological trickling filtration section is avoided, and the stability of the biological trickling filtration section is kept; the odor from different sources is treated according to concentration, the load of the spray tower can be reduced, the air quantity entering the spray tower is small, the high-concentration odor can be treated more thoroughly, the deodorization is stable, and the medicament is saved.

The utility model discloses a further set up to: the spray tower comprises an alkaline washing tower and an acid washing tower, the upper end of the alkaline washing tower is connected with the lower end of the acid washing tower through a pipeline, and the upper end of the acid washing tower is connected with the upper end of the biological filter.

Through adopting above-mentioned technical scheme, the foul smell is followed the caustic wash tower lower extreme and is gone into, alkali liquor and the foul smell that constantly spray in through the caustic wash tower take place neutralization reaction, can remove acidic material such as hydrogen sulfide, surplus foul smell is from the caustic wash tower upper end play, get into the pickling tower lower extreme, acid liquor and the foul smell that constantly spray in through the pickling tower take place neutralization reaction, can get rid of alkaline material such as ammonia nitrogen, thereby reach the purpose of getting rid of the pollutant, through detached caustic wash tower and pickling tower, it is highly higher, increase the time of acid-base liquid and foul smell contact, make acid-base liquid and foul smell reaction more abundant.

The utility model discloses a further set up to: the inside of the alkaline tower and the acid tower are of two-section structures, the alkaline tower and the acid tower are sequentially provided with a demister, a spray pipeline, a nozzle and a filler from top to bottom, the lower ends of the alkaline tower and the acid tower are respectively provided with a circulating pump, the spray pipeline passes through the circulating pump and forms two first circulating pipelines with the alkaline tower, and the spray pipeline passes through the circulating pump and forms two second circulating pipelines with the acid tower.

By adopting the technical scheme, the inside of the alkaline washing tower and the acid washing tower is of a double-layer structure, the demister, the spraying pipeline, the spray nozzle and the filler are arranged in each layer of structure from top to bottom, odor is circularly sprayed through the circulating pump, and the two circulating pipelines are fully contacted on the surface of the filler, so that the agent is more fully combined with the odor, and the deodorization efficiency is improved.

The utility model discloses a further set up to: the alkali washing tower is sequentially connected with an alkali adding pump and an alkali medicine box, the acid washing tower is sequentially connected with an acid adding pump and an acid medicine box, and stirrers are arranged in the acid medicine box and the alkali medicine box.

By adopting the technical scheme, the water level of the alkaline washing tower is filled to the high liquid level before starting, the circulating pumps (2 circulating pumps) are opened, circulating spraying is carried out through the spraying pipelines, when the water level reaches the medium liquid level, the valve of the water supplementing electromagnetic valve is opened, water supplementing is started to the high liquid level, the water supplementing is stopped, the water level reaches the low liquid level, and the circulating pumps stop running. The pH value of the alkaline tower is 9-11, when the pH value exceeds 11, an alarm is given, water is supplemented and diluted to 10, when the pH value is lower than 9, an alarm is given, and an alkaline adding pump is started to add chemicals and adjust the chemicals to 10 (the concentration of sodium hydroxide in an alkaline medicine box is generally 10% -20%). Make the pickling tower water level fill to high liquid level before the start, open the circulating pump (the circulating pump is 2), spray through the shower pipeline circulation, when the water level was to well liquid level, the moisturizing solenoid valve was opened, began to mend water to high liquid level, and the moisturizing stops, and the water level is to low liquid level, and the circulating pump stops the operation. The pH value of the acid washing tower is 3-5, when the pH value is lower than 3, an alarm is given, water is supplemented and diluted to 4, when the pH value is higher than 5, an alarm is given, and an acid adding pump is started to add medicine and adjust the medicine to 4 (the concentration of dilute sulfuric acid in an acid medicine box is generally 10% -20%). The PH values in the alkaline washing tower and the acid washing tower are dynamically monitored, and the PH concentration in the towers is timely adjusted, so that the deodorization effect is more stable.

The utility model discloses a further set up to: the biological filter is including mixing section and biological trickling filter section, the mixing section lower extreme is connected with circulating water tank, the circulating water tank other end is connected with the prewashing pump, the mixing section forms circulating line three through spray line and circulating water tank, prewashing pump, biological trickling filter section lower extreme is connected with spray tank, the spray tank other end is connected with the humidification water pump, biological trickling filter section forms circulating line four through spray line and spray tank, humidification water pump.

By adopting the technical scheme, before starting, the water level of the mixing section is filled to a high liquid level, the prewashing pump is started (the prewashing pump is one-use and one-standby), circulating spraying is carried out through the spraying pipeline, when the water level reaches a medium liquid level, the water replenishing electromagnetic valve is opened, water replenishing is started, the water level reaches the high liquid level, and the water replenishing is stopped; when the water level reaches a low level, the prewashing pump stops running; the normal PH value range is 6-8, when the pH value is over or under, an alarm is given, when the pH value is under, water is supplemented, and when the pH value is over, water is drained to enable the PH value to be 7. Before starting up, enabling the water level of the biological trickling filtration section to be high, starting a humidifying water pump, circularly spraying through a spraying pipeline, starting water replenishing by opening a water replenishing electromagnetic valve when the water level reaches a middle liquid level, starting water replenishing, enabling the water level to be high, and stopping water replenishing; stopping the operation of the humidifying water pump when the water level is lower than the low level; the PH value ranges from 6 to 8, when the PH value exceeds or is lower than the pH value, an alarm is given, when the PH value exceeds the pH value, water is drained, and when the PH value is lower than the pH value, water is supplemented, so that the PH value is 7. The PH values in the mixing section and the biological trickling filtration section are dynamically monitored, and the PH concentration in the biological filter is timely adjusted, so that the biological flora is kept in a constant environment, and the adsorption of odor is facilitated.

The utility model discloses a further set up to: the biological filter is sequentially provided with a spray pipeline, a spray nozzle, organic filler and biological filler from top to bottom.

Through adopting above-mentioned technical scheme, biological filter casing material is steel skeleton and glass steel, organic filler is the taylor ring, the porosity of taylor ring filler is big, be difficult for blockking up, it is big to have flux, advantage such as resistance is little, because the clearance department of this kind of filler can have higher stagnant liquid volume, can make the interior liquid dwell time of tower longer, thereby harmful gas and microorganism contact time have been increased, biological filler is volcanic rock, the bark, it has big specific surface area, higher porosity, certain mechanical strength and lighter bulk density, high moisturizing ability, can provide the required abundant nutrient substance of microorganism growth.

The utility model discloses a further set up to: and a gas outlet of the biological filter is sequentially connected with a mixed draught fan and a chimney.

By adopting the technical scheme, the odor treated by the biological filter is discharged to the atmosphere from a chimney through a mixing induced draft fan, and the height of the chimney is 15 meters according to the odor emission standard of GB 14554-1993.

The utility model discloses a further set up to: the low-concentration odor inlet is connected with a low-concentration deodorization fan, and the high-concentration odor inlet is connected with a high-concentration deodorization fan.

By adopting the technical scheme, the air volume of the low-concentration deodorizing fan is 25000m ³ H, 8000m of high-concentration deodorization fan air volume ³ And h, the air volume of the high-concentration deodorization fan is smaller, so that the high-concentration odor is more stably treated by the spray tower.

The utility model has the advantages that:

1. low concentration foul smell and high concentration foul smell source are different, the composition is different, low concentration foul smell is mainly for kitchen garbage feed shop foul smell, the foul smell composition is mainly ammonia and hydrogen sulfide, the high concentration foul smell is mainly the foul smell that the kitchen garbage pyrolysis section produced, contain the organic gas that produces behind a large amount of kitchen garbage pyrolysis, need carry on in advance to handle and after the cooling can be utilized by the microorganism, alkali lye through constantly spraying in the alkaline tower reacts with the foul smell, can remove acidic material such as hydrogen sulfide, the acidizing fluid that constantly sprays in the pickling tower reacts with the foul smell, can get rid of alkaline material such as ammonia nitrogen, then pass through the biofilter again, through the decomposition of microorganism, thereby reach the purpose of getting rid of the pollutant.

2. Different odors are treated according to concentration, the load of an acid cleaning tower and an alkali cleaning tower is reduced, the air quantity entering the acid cleaning tower and the alkali cleaning tower is smaller, the high-concentration odor can be treated more thoroughly, the deodorization is stable, and the medicament is saved.

3. The high concentration foul smell and the low concentration foul smell after the processing mix the homogeneity in the mixing section of biological filter, then arrange into the bio-trickling filter section and handle, and the accessible is adjusted the flow of high concentration foul smell and low concentration foul smell, makes the foul smell concentration of mixing section keep within certain range, and the foul smell concentration that avoids getting into the bio-trickling filter section is undulant too big, guarantees bio-trickling filter section operating stability.

4. Compared with the method that an acid washing area and an alkaline washing area are arranged in one washing tower, the method has the advantages that the time for contacting the agent with the odor is prolonged, and the agent reacts with the odor more fully.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic plan view of the present invention.

Fig. 2 is a schematic view of the flow of the pipeline meter of the present invention.

FIG. 3 is a schematic diagram of the alkaline washing tower of the present invention.

Fig. 4 is a structural schematic diagram of the novel biological filter of the utility model.

In the figure, 1, a low concentration odor inlet; 2. a high concentration odor inlet; 3. a low concentration deodorizing fan; 4. a high concentration deodorizing fan; 5. a biological filter; 51. a mixing section; 52. a bio-trickling section; 6. a spray tower; 7. an alkaline washing tower; 8. an acid washing tower; 9. a demister; 10. a spray pipe; 11. a nozzle; 12. a filler; 13. a circulation pump; 14. a first circulating pipeline; 15. a second circulating pipeline; 16. adding an alkali pump; 17. a caustic soda box; 18. adding an acid pump; 19. an acid medicine box; 20. a stirrer; 21. a circulating water tank; 22. pre-washing the pump; 23. a third circulating pipeline; 24. a spray water tank; 25. a humidifying water pump; 26. a fourth circulating pipeline; 27. an organic filler; 28. biological stuffing; 29. mixing an induced draft fan; 30. and (4) a chimney.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to the specific embodiments. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1, a kitchen workshop deodorization uses biological filter 5, including low concentration foul smell entry 1 and high concentration foul smell entry 2, low concentration foul smell entry 1 is connected with low concentration deodorization fan 3, the low concentration deodorization fan 3 other end is connected with biological filter 5, high concentration foul smell entry 2 is connected with high concentration deodorization fan 4, the high concentration deodorization fan 4 other end is connected with spray column 6, spray column 6 upper end links to each other with biological filter 5 upper end, biological filter 5 is provided with the gas outlet, the gas outlet has connected gradually mixed draught fan 29 and chimney 30, chimney 30 highly is 15 meters.

The odor of the kitchen pretreatment workshop and the homogenizing tank enters respective fans through pipelines, and the air volume of the low-concentration deodorizing fan is 25000m ³ H, 8000m of high-concentration deodorization fan air volume ³ The low-concentration odor with the concentration of 25000m < 3 >/h directly enters the mixing section 51 of the biological filter 5; the high-concentration odor with the concentration of 8000m & lt 3 & gt/h enters the spray tower 6 for treatment and then enters the mixing section 51 of the biological filter 5, the high-concentration odor and the low-concentration odor are mixed and homogenized in the mixing section 51, the odor concentration of the mixing section 51 is kept within a certain range, the excessive fluctuation of the odor concentration entering the biological trickling filtration section 52 is avoided, and the stability of the biological trickling filtration section 52 is kept; the odor from different sources can be treated according to concentration, the load of the spray tower 6 can be reduced, the air quantity entering the spray tower 6 is small, the high-concentration odor can be treated more thoroughly, the deodorization is stable, and the medicament is saved.

As shown in fig. 2 and 3, the spray tower 6 comprises an alkaline tower 7 and an acid tower 8, the upper end of the alkaline tower 7 is connected with the lower end of the acid tower 8 through a pipeline, and the upper end of the acid tower 8 is connected with the upper end of the biological filter 5. The foul smell is followed alkaline tower 7 lower extreme and is entered, alkali lye through constantly spraying in the alkaline tower 7 takes place neutralization reaction with the foul smell, can remove acidic material such as hydrogen sulfide, surplus foul smell is from alkaline tower 7 upper end play, get into pickling tower 8 lower extreme, acid liquor through constantly spraying in the pickling tower 8 takes place neutralization reaction with the foul smell, can get rid of alkaline material such as ammonia nitrogen, thereby reach the purpose of getting rid of the pollutant, through detached alkaline tower 7 and pickling tower 8, high height, increase the time of acid lye and foul smell contact, make acid lye and foul smell react more fully.

As shown in fig. 2 and 3, the inside of the alkaline tower 7 and the inside of the acid tower 8 are of a two-stage structure, the alkaline tower 7 and the acid tower 8 are sequentially provided with a demister 9, a spray pipeline 10, a nozzle 11 and a filler 12 from top to bottom, the lower ends of the alkaline tower 7 and the acid tower 8 are respectively provided with a circulating pump 13, the spray pipeline 10 and the alkaline tower 7 form two circulating pipelines 14 through the circulating pump 13, and the spray pipeline 10 and the acid tower 8 form two circulating pipelines 15 through the circulating pump 13.

The alkaline tower 7 and the acid washing tower 8 are both made of fiber reinforced composite materials, the alkaline tower 7 and the acid washing tower 8 are identical in structure, two sections of structures are arranged inside the alkaline tower 7 and the acid washing tower 8 to form two circulating pipelines, odor and agents are combined more fully through the two circulating pipelines, the odor and the agents are fully contacted on the surface of the filler 12, and the deodorization efficiency is improved. The alkaline washing tower 7 and the acid washing tower 8 are both provided with a PH meter and a water replenishing electromagnetic valve, the water replenishing electromagnetic valve is controlled, and when the high liquid level is reached, the water replenishing electromagnetic valve is closed; when the liquid level reaches the middle level, the water replenishing electromagnetic valve is opened, water starts to be fed, and the water replenishing electromagnetic valve is closed when the liquid level reaches the high level; the circulation pump 13 is protected, and when the low liquid level is reached, the circulation pump 13 stops working.

As shown in fig. 2, the alkali washing tower 7 is connected to an alkali feed pump 16 and an alkali medicine tank 17 in this order, the acid washing tower 8 is connected to an acid feed pump 18 and an acid medicine tank 19 in this order, and stirrers 20 are provided in both the acid medicine tank 19 and the alkali medicine tank 17. Before starting the alkaline tower, the water level of the alkaline tower 7 is filled to a high liquid level, the circulating pumps 13 (2 circulating pumps 13) are started, circulating spraying is carried out through the spraying pipelines 10, when the water level reaches a medium liquid level, the water supplementing electromagnetic valve is opened, water supplementing is started to the high liquid level, water supplementing is stopped, the water level reaches a low liquid level, and the circulating pumps 13 stop running. The pH value of the alkaline tower 7 is 9-11, when the pH value exceeds 11, an alarm is given, water is supplemented and diluted to 10, when the pH value is lower than 9, an alarm is given, and an alkaline adding pump 16 is started to add chemicals and adjust the chemicals to 10 (the concentration of sodium hydroxide in an alkaline medicine box 17 is generally 10% -20%). Before starting, the water level of the pickling tower 8 is filled to a high liquid level, the circulating pumps 13 (2 circulating pumps 13) are started, circulating spraying is carried out through the spraying pipelines 10, when the water level reaches a medium liquid level, the water supplementing electromagnetic valve is opened, water supplementing is started to the high liquid level, water supplementing is stopped, the water level reaches a low liquid level, and the circulating pumps 13 stop running. The pH value of the acid washing tower 8 is 3-5, when the pH value is lower than 3, an alarm is given, water is supplemented and diluted to 4, when the pH value is higher than 5, an alarm is given, an acid adding pump 18 is started to add the medicine and adjust the medicine to 4 (the concentration of dilute sulfuric acid in an acid medicine box 19 is generally 10% -20%).

As shown in fig. 2 and 4, the biological filter 5 includes a mixing section 51 and a bio-trickling filter section 52, the lower end of the mixing section 51 is connected with a circulation water tank 21, the other end of the circulation water tank 21 is connected with a prewashing pump 22, the mixing section 51 forms a circulation pipeline three 23 with the circulation water tank 21 and the prewashing pump 22 through a spray pipeline 10, the lower end of the bio-trickling filter section 52 is connected with a spray water tank 24, the other end of the spray water tank 24 is connected with a humidifying water pump 25, and the bio-trickling filter section 52 forms a circulation pipeline four 26 with the spray water tank 24 and the humidifying water pump 25 through the spray pipeline 10.

As shown in fig. 2, before starting up, the water level of the mixing section 51 is increased to a high level, the prewashing pump 22 is turned on (the prewashing pump 22 is used for one purpose), circulating spraying is carried out through the spraying pipeline 10, when the water level reaches a middle level, the valve of the water replenishing electromagnetic valve is opened, water replenishing is started, when the water level reaches the high level, the water replenishing is stopped; when the water level reaches the low level, the prewash pump 22 stops running; the normal PH value range is 6-8, when the pH value is over or under, an alarm is given, when the pH value is under, water is supplemented, and when the pH value is over, water is drained to enable the PH value to be 7. Before starting the device, enabling the water level of the biological trickling filtration section 52 to reach a high liquid level, opening the humidifying water pump 25, circularly spraying through the spraying pipeline 10, opening a water supplementing electromagnetic valve when the water level reaches a middle liquid level, starting water supplementing, enabling the water level to reach the high liquid level, and stopping water supplementing; the humidifying water pump 25 stops running when the water level is lower than the low level; the pH value is 6-8, when the pH value exceeds or falls below the pH value, an alarm is given, when the pH value exceeds or falls below the pH value, water is drained, and when the pH value falls below the pH value, water is supplemented, so that the pH value is 7.

As shown in FIG. 4, the biological filter 5 is provided with a spray pipe 10, a nozzle 11, an organic filler 27 and a biological filler 28 from top to bottom in sequence. The shell of the biological filter 5 is made of steel framework and glass fiber reinforced plastic, the organic filler 27 is Taylor ring, the porosity of the filler of the Taylor ring is large, the filler is not easy to block, the filler has the advantages of large flux, small resistance and the like, and the gap of the filler can have higher liquid stagnation amount, so that the liquid retention time in the tower is longer, the contact time of harmful gas and microorganisms is prolonged, the biological filler 28 is volcanic rock and bark, and the filler has large specific surface area, higher porosity, certain mechanical strength, lighter stacking density and high moisture retention capacity, and can provide rich nutrient substances required by the growth of the microorganisms.

Claims

1. The utility model provides a kitchen workshop is biological filter (5) for deodorization which characterized in that: including biological filter (5), biological filter (5) are including mixing section (51) and bio-trickling filter section (52), it is equipped with low concentration foul smell entry (1) and high concentration foul smell entry (2) to mix section (51) top, high concentration foul smell entry (2) are connected with spray column (6), connect in spray column (6) upper end mix section (51) upper end, be provided with the gas outlet on biological filter (5).

2. The biological filter for deodorization of kitchen workshops according to claim 1, characterized in that: the spray tower (6) comprises an alkaline washing tower (7) and an acid washing tower (8), the upper end of the alkaline washing tower (7) is connected with the lower end of the acid washing tower (8) through a pipeline, and the upper end of the acid washing tower (8) is connected with the upper end of the biological filter (5).

3. The biological filter for deodorization of the kitchen workshop according to claim 2, characterized in that: alkali wash tower (7) with inside two sections structures that are of pickling tower (8), alkali wash tower (7) with pickling tower (8) are from last to being equipped with defroster (9), spray piping (10), nozzle (11), filler (12) down in proper order, alkali wash tower (7) with pickling tower (8) lower extreme is equipped with circulating pump (13) separately, spray piping (10) warp circulating pump (13) with alkali wash tower (7) form two circulating line one (14), spray piping (10) warp circulating pump (13) with pickling tower (8) form two circulating line two (15).

4. The biological filter for deodorization of kitchen workshops according to claim 3, characterized in that: the alkali washing tower (7) is sequentially connected with an alkali adding pump (16) and an alkali medicine box (17), the acid washing tower (8) is sequentially connected with an acid adding pump (18) and an acid medicine box (19), and stirrers (20) are arranged in the acid medicine box (19) and the alkali medicine box (17).

5. The biological filter for deodorization of kitchen workshops according to claim 1, characterized in that: biological filter (5) are including mixing section (51) and biological trickling filter section (52), mixing section (51) lower extreme is connected with circulating water tank (21), circulating water tank (21) other end is connected with prewashing pump (22), mixing section (51) forms circulating line three (23) through spray piping (10) and circulating water tank (21), prewashing pump (22), biological trickling filter section (52) lower extreme is connected with spray tank (24), spray tank (24) other end is connected with humidification water pump (25), biological trickling filter section (52) forms circulating line four (26) through spray piping (10) and spray tank (24), humidification water pump (25).

6. The biological filter for deodorization of kitchen workshops according to claim 4, characterized in that: the biological filter (5) is sequentially provided with a spray pipeline (10), a nozzle (11), organic fillers (27) and biological fillers (28) from top to bottom.

7. The biological filter for deodorization of kitchen workshops according to claim 1, characterized in that: and the gas outlet of the biological filter (5) is sequentially connected with a mixed induced draft fan (29) and a chimney (30).

8. The biological filter for deodorization of kitchen workshops according to claim 1, characterized in that: the low-concentration odor inlet (1) is connected with a low-concentration deodorization fan (3), and the high-concentration odor inlet (2) is connected with a high-concentration deodorization fan (4).