CN111558291A

CN111558291A - Coking wastewater treatment and odor deodorization system and process

Info

Publication number: CN111558291A
Application number: CN202010575177.XA
Authority: CN
Inventors: 李占忠; 李易非
Original assignee: Jiangsu Xinhuilin Environment Engineering Co ltd
Current assignee: Jiangsu Xinhuilin Environment Engineering Co ltd
Priority date: 2020-06-22
Filing date: 2020-06-22
Publication date: 2020-08-21

Abstract

The invention discloses a coking wastewater treatment and odor deodorization system and process, and relates to the technical field of wastewater treatment equipment. The invention comprises a collecting system, an alkaline washing tower, a sodium hypochlorite washing tower, a biological deodorant washing tower and a biological carbon adsorption box, wherein firstly, odor is collected in a centralized way through the collecting system, an odor pump in the collecting system is sequentially pumped into the alkaline washing tower, the sodium hypochlorite washing tower and the biological deodorant washing tower through an air pump for spraying and washing, and the washed gas is conveyed into the biological carbon adsorption box through a centrifugal pump for filtering so as to be discharged after reaching the discharge standard. The invention has good deodorization effect, high efficiency and convenient regulation and control.

Description

Coking wastewater treatment and odor deodorization system and process

Technical Field

The invention relates to the technical field of wastewater treatment equipment, in particular to a coking wastewater treatment and odor deodorization system and a process based on the deodorization system.

Background

A large amount of odor can be generated in the production process of a factory, and because the odor contains ammonia, hydrogen sulfide, methyl mercaptan, methane and other odor pollutants with overproof components, the emission standard of the odor cannot be met, the odor generated in the processing and production process needs to be covered, sealed and collected, then the odor is subjected to centralized deodorization treatment, and toxic and harmful pollutants in the gas are filtered to be discharged into the air after reaching the national emission standard.

The washing tower is a novel gas purification treatment device. It is produced by improving on the basis of a floatable filler layer gas purifier, and is widely applied to the pretreatment in the aspects of industrial waste gas purification, dust removal and the like, and the purification effect is good.

However, the odor in the prior art is not sufficiently contacted with the cleaning solution when being treated, thereby causing the efficiency of the filtering treatment of the odor by the device to be reduced.

Disclosure of Invention

The invention provides a coking wastewater treatment and odor deodorization system and a coking wastewater treatment and odor deodorization process, which aim to solve the technical problems of low filtration efficiency, large occupied area, large resistance loss, high energy consumption and the like of a carbon box in the prior art.

The utility model provides a coking wastewater treatment and waste gas deodorization system, sprays layer, chemical agent and sprays layer, active carbon filter equipment and circulation liquid receiver including equipment barrel, first filling layer, second filling layer, washing liquid, the bottom side of equipment barrel is equipped with the air intake, the top of equipment barrel is equipped with the air outlet, first filling layer is the interval formula with the second filling layer and sets up the inside at the equipment barrel, the washing liquid sprays the inside that the layer set up the equipment barrel and is in the top of first filling layer, the chemical agent sprays the inside that the layer set up the equipment barrel and is in the top of second filling layer, active carbon filter equipment sets up in the equipment barrel and is in the below of air outlet, the bottom at the equipment barrel is stored the liquid receiver to the circulation.

Further, the structure that washing liquid sprayed the layer is the same with chemical agent sprays the layer, the washing liquid sprays the layer and communicates to the washing liquid, chemical agent sprays the layer and communicates to chemical agent, the washing liquid sprays the layer and comprises spray header, spray pipe and spiral nozzle, spray header sets up on spray pipe and is in the outside of equipment barrel, spray pipe is netted intercommunication setting each other, spiral nozzle is equipped with a plurality ofly, a plurality ofly spiral nozzle distributes on spray pipe.

Furthermore, a plurality of overhauling observation holes are arranged on the equipment cylinder and the circulating liquid storage tank.

Furthermore, a water collector is arranged on the equipment barrel and consists of a large number of water collecting plates, the water collecting plates are arranged in an M shape, and the water collecting plates are arranged in parallel.

Furthermore, a liquid level meter is arranged at the side end of the circulating liquid storage tank.

Furthermore, an automatic water replenishing port and a manual water replenishing port are respectively arranged at the side end of the circulating liquid storage tank.

A coking wastewater treatment and odor deodorization system and a process thereof comprise the following steps:

s1, firstly, the malodorous gas generated in the processing production process is intensively guided into a collection system.

And S2, conveying the malodorous gas in the collection system to an alkaline washing tower through a blower, wherein the malodorous gas is mainly used for eliminating odors caused by hydrogen sulfide, methyl mercaptan, methyl sulfide, methyl disulfide, lower fatty acid and the like. Generally, sodium hydroxide is used as a washing solution, and the sodium hydroxide solution is controlled to be 1-6%. And (3) monitoring the pH value in the water tank of the washing tower through an online pH meter when the pH value of the solution is lower than 8, starting a dosing pump, performing spray treatment on odor through the circulating liquid, completing the spray treatment, recycling the circulating liquid, and simultaneously discharging redundant wastewater.

S3, conveying the gas after the alkali washing treatment to a sodium hypochlorite washing tower for centralized treatment, mainly eliminating odor caused by alkaline gases such as ammonia, trimethylamine, and the like, generally adopting sulfuric acid as a washing solution, and controlling the sulfuric acid solution at 0.5-5%. And (3) monitoring the pH value in the water tank of the washing tower through an online pH meter, starting a dosing pump when the pH value of the solution is lower than 6, performing spray treatment on odor through the circulating liquid, completing the spray treatment, recycling the circulating liquid, and simultaneously discharging redundant wastewater.

S4: the gas after the sodium chlorate washing treatment is conveyed to a biological deodorant washing tower, the biological deodorant washing tower is provided with a filler and a spraying device, and because the waste gas is acidic or alkaline and hydrophilic, so that the water is selected as absorption liquid, the circulation pump is adopted to convey and the countercurrent washing is adopted, the waste gas is pressed into a pressure equalizing chamber in the tower by a fan, the waste gas enters the primary filler layer through the air-equalizing grid at a constant speed, the waste gas is evenly distributed around the PP multi-surface hollow spheres, each of the PP multi-surface hollow spheres is in point contact, the PP multi-surface hollow spheres walk in a Z or W irregular arrangement route without bias flow, and then the spiral high-flow and non-blocking nozzles are matched to ensure that the mixing rate of a gas phase and a liquid phase reaches more than 97 percent, the waste gas entering the absorption treatment tower is decelerated from a gradual expansion section to enter a secondary filler layer spraying functional section, the waste gas is subjected to gas-liquid two-phase full contact reaction again, and microorganisms capable of decomposing stink or generating decomposition enzymes through induction exist.

And S5, pumping the treated gas into a biological carbon adsorption box through a centrifugal fan to carry out filtration and adsorption treatment.

And S6, discharging the gas after the treatment reaches the discharge standard.

Compared with the prior art, the invention has the beneficial effects that:

firstly, the odor is collected in a centralized manner through a collection system, an odor pump in the collection system is sequentially pumped into an alkali washing tower, a sodium hypochlorite washing tower and a biological deodorant washing tower through an air pump for spraying and washing, the washed gas is conveyed into a biological carbon adsorption box through a centrifugal pump for filtering, and the odor is discharged after reaching the discharge standard and filtered through the mutual matching of a plurality of sets of washing towers, wherein the odor can be divided into three stages, namely a first stage: the odor is contacted with water and dissolved in the water, and the process follows Henry's law; and a second stage: the malodorous components in the water solution are adsorbed and absorbed by the microorganisms, and the malodorous components are transferred from the water to the microorganisms; and a third stage: the malodorous components entering the microbial cells are decomposed and utilized by the microbes as nutrient substances, so that pollutants are removed. The carbon box effectively solves the technical problems of low filtration efficiency, large occupied area, large resistance loss, high energy consumption and the like in the prior art.

Secondly, in the invention, a biochar adsorption box is additionally arranged in the post-process of the alkaline washing tower, the sodium hypochlorite washing tower and the biological deodorant washing tower, so that the odor filtering efficiency is further improved.

Drawings

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

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of an internal distribution structure of the present invention;

FIG. 3 is a top view of the present invention;

FIG. 4 is a schematic structural view of a cleaning solution spray layer according to the present invention;

FIG. 5 is a schematic structural view of the water collector of the present invention;

FIG. 6 is a process flow diagram of the present invention;

reference numerals: the device comprises an equipment cylinder 1, an air inlet 11, an air outlet 12, an overhaul observation hole 13, a water collector 14, a water collecting plate 141, a first filling layer 2, a second filling layer 3, a washing liquid spraying layer 4, a spraying joint 41, a spraying pipeline 42, a spiral nozzle 43, a chemical agent spraying layer 5, an activated carbon filtering device 6, a circulating liquid storage tank 7, a liquid level meter 71, an automatic water replenishing port 72 and a manual water replenishing port 73.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention.

The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A coking wastewater treatment and waste gas deodorization system comprises an equipment cylinder body 1, a first filling layer 2, a second filling layer 3, a washing liquid spraying layer 4, a chemical agent spraying layer 5, an active carbon filtering device 6 and a circulating liquid storage tank 7, wherein an air inlet 11 is arranged at the bottom side end of the equipment cylinder body 1, untreated odor is pumped into the equipment cylinder body 1 through the air inlet 11 by an air pump during use, an air outlet 12 is arranged at the top of the equipment cylinder body 1, the odor is filtered and treated in the equipment cylinder body 1 and then is discharged through the air outlet 12, the first filling layer 2 and the second filling layer 3 are arranged in the equipment cylinder body 1 at intervals, airflow sequentially passes through the first filling layer 2 and the second filling layer 3 after entering the equipment cylinder body 1 through the air inlet 11, and the washing liquid spraying layer 4 is arranged in the equipment cylinder body 1 and is positioned above the first filling layer 2, can erupt atomizing washing liquid through washing liquid spray layer 4, atomizing washing liquid contacts with the foul smell in getting into first filling layer 2, can promote washing liquid and foul smell to fully combine to take place the reaction through first filling layer 2, chemical sprays layer 5 and sets up the inside of equipment barrel 1 and is in the top of second filling layer 3, can erupt chemical through chemical sprays layer 5, contacts with the foul smell in the chemical gets into second filling layer 3, can promote washing liquid and foul smell to fully combine to take place the reaction through second filling layer 3, active carbon filter equipment 6 sets up in equipment barrel 1 and is in the below of air outlet 12, can carry out last further filtration to the foul smell through active carbon filter equipment 6, has further improved the filtration efficiency of foul smell, circulation liquid storage tank 7 sets up the bottom at equipment barrel 1, the washing agent and the chemical agent sprayed by the washing liquid spraying layer 4 and the chemical agent spraying layer 5 can enter the circulating liquid storage tank 7 to be collected in the falling process, a mud-water separation device can be additionally arranged in the circulating liquid storage tank 7 by workers, mud water formed after dust is contacted with the spraying liquid quickly enters the mud-water separation device, mud-water separation is carried out in time, and therefore the water source is recycled.

Preferably, the structure of the cleaning solution spraying layer 4 is the same as that of the chemical agent spraying layer 5, the cleaning solution spraying layer 4 is communicated with a cleaning solution, the chemical agent spraying layer 5 is communicated with a chemical agent, the cleaning solution spraying layer 4 is composed of a spraying joint 41, a spraying pipeline 42 and a plurality of spiral spray heads 43, the spraying joint 41 is arranged on the spraying pipeline 42 and is positioned outside the equipment cylinder 1, an external cleaning solution can be communicated into the spraying pipeline 42 through the spraying joint 41, the spraying pipeline 42 is communicated with each other in a net shape, the spiral spray heads 43 are provided with a plurality of spiral spray heads 43, the spiral spray heads 43 are distributed on the spraying pipeline 42, and the cleaning solution in the spraying pipeline 42 can be sprayed into the equipment cylinder 1 at high pressure through the spiral spray heads 43, so that the mixing reaction of the cleaning solution and odor is promoted.

Preferably, a plurality of maintenance observation holes 13 are arranged on the equipment cylinder 1 and the circulating liquid storage tank 7, and when the equipment is maintained, a worker can observe the inside of the equipment through the maintenance observation holes 13, so that the running and abrasion conditions of the equipment can be rapidly judged, and the maintenance convenience of the invention is improved.

Preferably, the equipment cylinder 1 is provided with the water collector 14, the water collector 14 is composed of a plurality of water collecting plates 141, the water collecting plates 141 are arranged in an M shape, and the plurality of water collecting plates 141 are arranged in parallel, so that the water collector 14 is arranged in the equipment cylinder 1, when odor is pumped into the equipment cylinder 1, the odor is prevented from driving the washing liquid or the chemical agent to be discharged together in the rising process, and when the washing liquid or the chemical agent floats and rises to the position of the water collector 14, the washing liquid or the chemical agent collides with the water collecting plates 141 to form liquid water drops, and the liquid water drops fall into the circulating liquid storage tank 7 under the action of gravity to be collected in a centralized manner.

Preferably, a liquid level meter 71 is provided at a side end of the circulating liquid sump 7, the liquid level in the circulating liquid sump 7 can be detected by the liquid level meter 71, and the water in the circulating liquid sump 7 is timely drained through a pipe when the liquid level meter 71 detects that the liquid level in the circulating liquid sump 7 is excessively high.

Preferably, an automatic water replenishing port 72 and a manual water replenishing port 73 are provided at the side ends of the circulating liquid sump 7, respectively, and water can be replenished into the circulating liquid sump 7 automatically or manually through the automatic water replenishing port 72 and the manual water replenishing port 73, respectively.

When the device is used, untreated odor is pumped into the device cylinder 1 through the air inlet 11 by the air pump, the odor sequentially passes through the first filling layer 2, the cleaning solution spraying layer 4, the second filling layer 3 and the chemical agent spraying layer 5 from bottom to top in the device cylinder 1, the full fusion reaction of the waste gas, the cleaning solution and the chemical agent can be respectively promoted by the first filling layer 2 and the second filling layer 3, the reaction efficiency and the treatment effect of the device are improved, then the waste gas enters the water receiver 14 and is prevented from driving the cleaning solution or the chemical agent to be discharged together in the rising process through the water receiver 14, the cleaning solution or the chemical agent collides with the water receiving plate 141 to form liquid water drops when floating and rising to the water receiver 14, the odor after water receiving enters the active carbon filtering device 6, and can be further filtered through the active carbon filtering device 6, the filtered gas is discharged through the air outlet 12, wherein the washing liquid sprays the layer 4 and the chemical agent sprays the layer 5, the odor moves upwards and simultaneously sprays the washing liquid and the chemical agent downwards, the odor is subjected to mixed reaction treatment through the washing liquid and the chemical agent, and the washing liquid and the chemical agent after reaction fall into the circulating liquid storage tank 7 under the action of gravity for concentrated collection, so that the washing liquid and the chemical agent are recycled, and the operation stability of the equipment is improved.

s1, firstly, the malodorous gas generated in the processing and production process is intensively guided into a collection system

And S2, conveying the malodorous gas in the collection system to an alkaline washing tower through a blower, wherein the malodorous gas is mainly used for eliminating odors caused by hydrogen sulfide, methyl mercaptan, methyl sulfide, methyl disulfide, lower fatty acid and the like. Generally, sodium hydroxide is used as a washing solution, and the sodium hydroxide solution is controlled to be 1-6%. The pH value of a circulating water tank of the washing tower is 9-10, the pH value of the water tank is monitored through an online pH meter, when the pH value of a solution is lower than 8, a dosing pump is started, odor is sprayed through circulating liquid, the circulating liquid is recycled after spraying treatment is completed, and meanwhile, redundant wastewater is discharged.

S3, conveying the gas after the alkali washing treatment to a sodium hypochlorite washing tower for centralized treatment, mainly eliminating odor caused by alkaline gases such as ammonia, trimethylamine, and the like, generally adopting sulfuric acid as a washing solution, and controlling the sulfuric acid solution at 0.5-5%. The pH value of a circulating water tank of the washing tower is 3-6, the pH value of the water tank is monitored through an online pH meter, when the pH value of a solution is lower than 6, a dosing pump is started, odor is sprayed through circulating liquid, the circulating liquid is recycled after spraying treatment is completed, and meanwhile, redundant wastewater is discharged.

S4, conveying the gas after sodium chlorate washing treatment to a biological deodorant washing tower, wherein the biological deodorant washing tower is provided with a filler and a spraying device, because the waste gas is acidic or alkaline and hydrophilic in nature, water is selected as absorption liquid, the waste gas is conveyed by a circulating pump and washed in a counter-flow manner, the waste gas is pressed into a pressure equalizing chamber in the tower by a fan and enters a primary packing layer at a constant speed through an air equalizing grid, the waste gas is evenly distributed around PP multi-surface hollow spheres, each sphere is in point contact, a Z or W irregular route is arranged to walk without bias flow, a spiral high-flow and non-blocking nozzle is matched to ensure that the mixing rate of a gas phase and a liquid phase reaches more than 97 percent, the waste gas after entering the absorption treatment tower is decelerated by a gradual expansion section to enter a secondary packing layer spraying functional section, the waste gas is subjected to gas-liquid two-phase full contact reaction, and microorganisms capable of decomposing foul smell or generating decomposing enzyme, the microbial deodorization is composed of the following three stages: the first stage is as follows: the odor comes into contact with water and dissolves into the water, a process that follows henry's law. And a second stage: the malodorous components in the aqueous solution are adsorbed and absorbed by the microorganisms, and the malodorous components are transferred from the water to the microorganisms. And a third stage: the malodorous components entering the microbial cells are decomposed and utilized by the microbes as nutrient substances, so that pollutants are removed. The nitrogen-free substance is decomposed into CO2 and H2O, and the sulfur-containing malodorous component can be oxidized and decomposed into S, SO 3-and SO 4-; the malodorous components containing nitrogen are oxidized and decomposed into NH4+, NO 2-and NO 3-. The organic and inorganic pollutants in the malodorous substances are oxidized and decomposed into simple inorganic substances under the participation of oxidizing microorganisms, and simultaneously, energy is generated for synthesizing cell substances

And S6, discharging the gas after the treatment reaches the discharge standard.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A coking wastewater treatment and waste gas deodorization system is characterized by comprising an equipment cylinder body (1), a first filling layer (2), a second filling layer (3), a washing liquid spraying layer (4), a chemical agent spraying layer (5), an activated carbon filtering device (6) and a circulating liquid storage tank (7), wherein an air inlet (11) is formed in the bottom side end of the equipment cylinder body (1), an air outlet (12) is formed in the top of the equipment cylinder body (1), the first filling layer (2) and the second filling layer (3) are arranged in the equipment cylinder body (1) at intervals, the washing liquid spraying layer (4) is arranged in the equipment cylinder body (1) and is positioned above the first filling layer (2), the chemical agent spraying layer (5) is arranged in the equipment cylinder body (1) and is positioned above the second filling layer (3), the activated carbon filtering device (6) is arranged in the equipment cylinder body (1) and is positioned below the air outlet (12), the circulating liquid storage tank (7) is arranged at the bottom of the equipment cylinder body (1).

2. The coking wastewater treatment and waste gas deodorization system according to claim 1, wherein the washing liquid spraying layer (4) and the chemical agent spraying layer (5) have the same structure, the washing liquid spraying layer (4) is communicated with the washing liquid, the chemical agent spraying layer (5) is communicated with the chemical agent, the washing liquid spraying layer (4) is composed of a spraying joint (41), a spraying pipeline (42) and spiral spray heads (43), the spraying joint (41) is arranged on the spraying pipeline (42) and is positioned at the outer side of the equipment cylinder (1), the spraying pipeline (42) is arranged in a net shape and is communicated with each other, the spiral spray heads (43) are provided in plurality, and the spiral spray heads (43) are distributed on the spraying pipeline (42).

3. The coking wastewater treatment and waste gas deodorization system according to claim 1, wherein the equipment cylinder (1) and the circulating liquid sump (7) are provided with a plurality of inspection holes (13).

4. The coking wastewater treatment and waste gas deodorization system according to claim 1, characterized in that a water collector (14) is arranged on the equipment cylinder (1), the water collector (14) is composed of a plurality of water collecting plates (141), the water collecting plates (141) are arranged in an M shape, and the plurality of water collecting plates (141) are arranged in parallel.

5. The coking wastewater treatment and exhaust gas deodorization system according to claim 1, wherein a liquid level meter (71) is provided at a side end of the circulating liquid tank (7).

6. The coking wastewater treatment and exhaust gas deodorization system according to claim 1, wherein the circulating liquid sump (7) is provided at side ends thereof with an automatic water replenishment port (72) and a manual water replenishment port (73), respectively.

7. A deodorization process based on a coking wastewater treatment and odor deodorization system comprises the following steps:

And S6, discharging the gas after the treatment reaches the discharge standard.