CN111068489A

CN111068489A - Device and method for purifying waste gas generated in processing of ham and meat cans in food industry

Info

Publication number: CN111068489A
Application number: CN202010053896.5A
Authority: CN
Inventors: 李云飞; 周永毅; 覃瑞卿
Original assignee: Liaoning Zike Environmental Protection Technology Co Ltd
Current assignee: Liaoning Zike Environmental Protection Technology Co Ltd
Priority date: 2020-01-17
Filing date: 2020-01-17
Publication date: 2020-04-28

Abstract

The invention discloses a waste gas purification device for ham and meat can processing in food industry, which is characterized in that a suction filter type oil filter, an integrated device, a microbial degradation device, a gas distribution device and an odor controller are sequentially communicated through a connecting pipe, the integrated device internally comprises a primary washing structure, a secondary washing structure, a tertiary washing structure and a dehydration structure, waste gas is subjected to oil-gas separation from the suction filter type oil filter and then sequentially enters the primary washing structure, the secondary washing structure and the tertiary washing structure for water washing, the washed waste gas is dehydrated by the dehydration structure and then enters the microbial degradation device for degradation, the degraded waste gas enters the gas distribution device and the odor controller for thorough deodorization, the waste gas purification device for ham and meat can processing in food industry has better purification effect on waste gas with large air volume, medium, low concentration, high temperature and large protein dust content, and the concentration of the waste gas is monitored, far below the environmental emission standard. The invention also relates to a method for purifying waste gas generated in processing of ham and meat cans in the food industry.

Description

Device and method for purifying waste gas generated in processing of ham and meat cans in food industry

Technical Field

The invention relates to waste gas purification, in particular to a waste gas purification device for processing ham and meat cans in the food industry.

Background

The pollution factors of ham and meat can processing waste gas in food industry are pollutants such as smoke, grease, burnt paste, industrial dust, peculiar smell gas and the like; and contains volatile organic compounds such as unsaturated aliphatic hydrocarbons, sesamol, methyl mercaptan, etc. The emission intensity of flue gas pollution is high, the emission amount of waste gas is large, the pollution components are complex and changeable, particularly, the offensive odor components in the waste gas easily cause great pollution to the surrounding environment and the plant area environment, and the phenomenon of disturbing residents is difficult to avoid.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide the waste gas purification device for processing the ham and meat cans in the food industry, which can aim at the characteristics of large air quantity, low concentration, high temperature, large amount of protein-containing dust and the like.

In order to overcome the defects of the prior art, the invention also aims to provide a method for purifying waste gas generated in processing of hams and meat cans in the food industry, which can aim at the characteristics of large air quantity, low concentration, high temperature, large amount of protein-containing dust and the like.

One of the purposes of the invention is realized by adopting the following technical scheme:

a waste gas purification device for processing ham and meat cans in food industry, which comprises a plurality of connecting pipes, a suction filter type oil filter, an integrated device, a microbial degradation device, a gas distribution device and a peculiar smell controller, the suction filtration type oil filter, the integrated equipment, the microbial degradation device, the gas distribution device and the odor controller are sequentially communicated through connecting pipes, the integrated equipment internally comprises a primary washing structure, a secondary washing structure, a tertiary washing structure and a dehydration structure, waste gas is subjected to oil-gas separation from the suction filtration type oil filter and then sequentially enters the primary washing structure, the secondary washing structure and the tertiary washing structure for water washing, the washed waste gas is dehydrated through the dehydration structure and then enters the microbial degradation device for degradation, and the degraded waste gas enters the gas distribution device and the odor controller for complete deodorization.

Furthermore, the suction filter comprises a suction filter chip, the suction filter chip adopts an alloy wire filter material, the filter material has extremely fine gaps, is in a labyrinth honeycomb type and is in a three-dimensional net structure, most oily particles can be adsorbed on the suction filter chip in the process that waste gas passes through the suction filter chip, and when residual oily molecules of fine particles pass through the labyrinth type and the inside of the suction filter chip with extremely fine gaps, the oily molecules of the fine particles are subjected to repeated violent collision due to rapid time change of filtering speed, and the airflow moves forward to form vortexes for multiple times, so that the oily molecules of the fine particles can be combined into large particles to be adhered to the wall of the suction filter chip and are settled under the action of gravity, and purification is achieved.

Further, the first-stage washing structure comprises a cross-flow washing tank, a packed bed arranged in the cross-flow washing tank, a spraying structure arranged at the top of the packed bed and a circulating water tank, wherein in the cross-flow washing tank, waste gas horizontally passes through one or more packed beds to be purified, the packed bed is cleaned from the top, cleaning liquid is sprayed on the top of the packed bed and flows into the circulating water tank after flowing through the packed bed, and the cleaning liquid is NaOH solution or lime water.

Furthermore, the two structures of the secondary washing structure and the primary washing structure are the same, and the cleaning liquid is also the same.

Further, the three-stage washing structure comprises a cross-flow washing tank, a packed bed positioned in the cross-flow washing tank, a spraying structure positioned at the top of the packed bed and a circulating water tank, wherein in the cross-flow washing tank, waste gas horizontally passes through one or more packed beds to be purified, the packed bed is cleaned from the top, cleaning liquid is sprayed on the top of the packed bed and flows into the circulating water tank after flowing through the packed bed, and the cleaning liquid is NEW BIO-C deodorization liquid.

Further, the microbial degradation device comprises a washing area and a biological trickling filter, waste gas firstly enters the washing area through an introducing port in an advection mode, the pretreatment of absorption, dust removal and humidification of the waste gas water is completed in the washing area, the unremoved malodorous gas enters the biological trickling filter again, and pollutants are transferred to the surface of the biological membrane from the gas phase when passing through a filter layer.

Further, the gas distribution device distributes gas to the peculiar smell controller, the peculiar smell controller comprises a deodorization diaphragm, deodorization particles are uniformly distributed on the surface of the deodorization diaphragm, deodorization microparticles can rapidly and actively capture odor gas molecules in the air and wrap the odor particles to generate non-covalent combination, and sedimentation is generated due to the increase of specific gravity after combination.

The second purpose of the invention is realized by adopting the following technical scheme:

a method for purifying waste gas generated in processing of ham and meat cans in food industry comprises the following steps:

primary filtration treatment: in the process that waste gas passes through a suction filter chip of the suction filter oil filter, most oily particles are adsorbed on the suction filter chip, when residual fine-particle oily molecules pass through the labyrinth type suction filter chip with extremely fine gaps, because the filtration speed is changed rapidly and time-dependently, the fine-particle oily molecules collide violently for many times, and vortexes are formed for many times in the process that the gas flow advances, so that the fine-particle oily molecules are combined into large-particle molecules which are adhered to the wall of the suction filter chip and are settled under the action of gravity, and the oil is purified;

primary alkali liquor washing: collecting and conveying the waste gas to a multi-stage cross-flow washing tank, wherein in the cross-flow washing tank, the gas is purified after horizontally passing through one or more packing beds, the packing is cleaned from the top, cleaning liquid is sprayed on the top of the packing, the cleaning liquid flows through the packing and enters a circulating water tank, NaOH solution or lime water is added into the circulating water tank, and substances such as NH3, H2S, thiol and fatty acid which is difficult to decompose are removed;

washing with alkali liquor for the second time: continuously conveying the waste gas to a multi-stage cross-flow washing tank, in the cross-flow washing tank, horizontally passing the gas through one or more packing beds to obtain purified gas, washing the packing from the top, spraying a cleaning solution on the top of the packing, allowing the cleaning solution to flow through the packing and enter a circulating water tank, adding a NaOH solution or lime water into the circulating water tank, and removing residual particles, dust, grease and smoke dust in the waste gas; and can remove hydrogen sulfide, acidic waste gas and components which are easy to dissolve in aqueous solution;

and (3) washing with odor liquid: conveying the waste gas to a multi-stage cross flow washing tank, wherein in the cross flow washing tank, the gas horizontally passes through one or more packing beds to be purified, the packing is cleaned from the top, cleaning liquid is sprayed on the top of the packing and flows through the packing to enter a circulating water tank, and NEW BIO-C deodorizing liquid or hydrogen peroxide is added into the circulating water tank, so that various pollutants in the waste gas can be effectively removed;

and (3) dehydration treatment: when the gas with mist rises through the spraying washing layer at a certain speed, the mist collides with the chemical washing layer and is attached to the surface of the chemical washing layer due to the inertia effect of rising mist, and the liquid drops are separated from the chemical washing layer and fall down until the gathered liquid drops are large enough that the gravity generated by the liquid drops exceeds the resultant force of the rising force of the gas and the surface tension of the liquid;

and (3) microbial degradation: the waste gas firstly enters a washing area through an introducing port in an advection manner, the pretreatment of absorption, dust removal and humidification of the waste gas water is completed in the washing area, the unremoved malodorous gas enters a biological trickling filter bed, and pollutants are transferred to the surface of a biological membrane from a gas phase when passing through a filter layer;

gas distribution and deodorization: deodorizing particles are uniformly distributed on the surface of the deodorizing membrane, deodorizing microparticles can quickly and actively capture odorous gas molecules in the air, the odorous particles are wrapped to generate non-covalent bonding, and sedimentation is generated due to the increase of specific gravity after bonding;

discharging: the height of the flue is increased by more than 15 meters through a chimney for discharging.

Compared with the prior art, the waste gas purification device for ham and meat can processing in the food industry has the characteristics of waste gas diversity, variability, high pollution concentration, large air volume for treatment and the like, and a treatment process is selected in a targeted manner so as to ensure that the waste gas can be discharged after passing through the device and reach the standard.

1. The waste gas purification device for processing the ham and meat cans in the food industry is convenient to install and occupies small area on site;

2. the operation process of the waste gas purification device for processing ham and meat cans in the food industry is safe, stable and reliable, and the operation and maintenance are convenient;

3. the multiple treatment processes are combined into integrated equipment, and the borne waste gas concentration and component load are large;

4. the targeted selection treatment process for the components of the waste gas can better control the operation and maintenance cost of the system;

5. the equipment is made of stainless steel, so that the appearance and the service life of the system are guaranteed to the maximum extent;

6. the tail end of the waste gas treatment system is designed with a dry neutralization method (industrial deodorization membrane), which not only ensures the cost index of the discharged waste gas, but also can effectively control the odor concentration of the discharge outlet.

Drawings

FIG. 1 is a perspective view of the waste gas purification device for ham and meat can processing in food industry according to the present invention;

FIG. 2 is a flow chart of the method for purifying waste gas generated in the processing of ham and meat cans in the food industry.

In the figure: 10. a suction filter type oil filter; 20. an integration device; 30. a microbial degradation device; 40. a gas distribution device; 50. a odor controller; 60. a medium-low pressure centrifugal fan; 70. and (4) a chimney.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present, secured by intervening elements. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly disposed on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 2, the waste gas purification apparatus for ham and meat can processing in food industry according to the present invention includes a suction filter type oil filter 10, an integrated device 20, a microbial degradation device 30, a gas distribution device 40, a odor controller 50, a middle and low pressure centrifugal fan 60, a chimney 70, and a plurality of connection pipes. The suction filtration type oil filter 10, the integrated equipment 20, the microbial degradation device 30, the gas distribution device 40, the odor controller 50, the medium-low pressure centrifugal fan 60 and the chimney 70 are sequentially communicated through a plurality of connecting pipes.

The housing of the suction filter 10 is made of high-temperature-resistant and corrosion-resistant SUS304 material, the internal suction filter chip is made of alloy wire filter material, and the inside of the suction filter chip is a special unit with extremely fine gaps and designed in a labyrinth honeycomb manner, is in a three-dimensional net structure, has the characteristics of high porosity (more than 95%), good tensile strength and moderate pore size, thereby reducing flow resistance, increasing the storage amount of oil and effectively solving the contradiction between purification and ventilation. When waste gas of oily aerosol particles passes through the suction filter chip, the waste gas collides with the suction filter chip, large oily particles are adhered to the surface of the suction filter chip, most oily particles are adsorbed on the suction filter chip in the process that the waste gas passes through the suction filter chip, and residual oily molecules of fine particles are quickly and timely changed when passing through the labyrinth type suction filter chip with extremely fine gaps, so that the oily molecules of the fine particles are violently collided for many times due to the rapid change of the filtering speed, and the airflow can form a vortex for many times in the advancing process, so that the oily molecules of the fine particles can be combined into large particles to be adhered to the wall of the chip and are settled under the action of gravity, thereby being purified.

The integrated apparatus 20 includes a primary washing structure, a secondary washing structure, a tertiary washing structure, and a dehydration structure.

The one-stage scrubbing structure includes a multi-stage cross-flow scrubbing cell in which the gas is purified after passing horizontally through one or more packed beds. The filler is cleaned from the top, and the cleaning liquid is sprayed on the top of the filler and flows into the circulating water tank after flowing through the filler. Adding NaOH solution or lime water into circulating water tank to remove NH₃、H₂S, thiol compounds, and hardly decomposable fatty acids.

When NaOH solution is used as a detergent, hydrogen sulfide and ammonia gas have good removal effect. Both substances are soluble in water and can react. The hydrosulfuric acid is weak acid, and is ionized in water in a grading way, and the hydrosulfuric acid is an aqueous solution of hydrogen sulfide gas, is a mixture and is volatile binary weak acid; ammonia is very soluble in aqueous solutions. The relevant reaction formula is as follows:

H₂S+H₂O＝HS^-+H₃O⁺

HS^-+H₂O＝S^2-+H₃O⁺

NH₃+H₂O＝NH₃·H₂O

the NaOH solution has a good treatment effect on hydrogen sulfide, and the reaction formula is as follows:

H₂S+2NaOH＝Na₂S+H₂O(H₂s quantity)

H₂S+NaOH＝NaHS+H₂O(H₂S excess)

The secondary scrubbing structure includes a multi-stage cross-flow scrubbing tank in which the gas is purified after passing horizontally through one or more packed beds. The filler is cleaned from the top, and the cleaning liquid is sprayed on the top of the filler and flows into the circulating water tank after flowing through the filler. In the circulating water tank addAdding NaOH solution or limewater to remove NH₃、H₂S, thiol compounds, and hardly decomposable fatty acids.

H₂S+H₂O＝HS^-+H₃O⁺

HS^-+H₂O＝S^2-+H₃O⁺

NH₃+H₂O＝NH₃·H₂O

H₂S+2NaOH＝Na₂S+H₂O(H₂s quantity)

H₂S+NaOH＝NaHS+H₂O(H₂S excess)

The three-stage scrubbing structure comprises a multi-stage cross-flow scrubbing cell in which the gas is purified after passing horizontally through one or more packed beds. The filler is cleaned from the top, and the cleaning liquid is sprayed on the top of the filler and flows into the circulating water tank after flowing through the filler. NEW BIO-C deodorizing liquid or hydrogen peroxide is added into the circulating water tank, so that various pollutants in the waste gas can be effectively removed.

The NEW BIO-C deodorizing liquid contains deodorizing particles, and the surfaces of the deodorizing particles can not only effectively adsorb peculiar smell molecules in the air, but also promote the change of the spatial configuration of the adsorbed peculiar smell molecules. The deodorizing particles can provide electrons for odor molecules to accelerate the reaction with the odor molecules; the surface energy can adsorb odor molecules in the air, and the three-dimensional structure in the odor molecules is changed and becomes unstable; meanwhile, odor molecules adsorbed on the surfaces of the deodorizing particles can also react with oxygen in the air. The detailed process is as follows:

acid-base reaction, for example, the deodorized particles contain trace alkaloid which can react with acidic odor molecules such as hydrogen sulfide. Unlike typical acid-base reactions, typical bases are toxic, inedible, and not biodegradable. The high-purity plant extract can be biodegraded and is nontoxic.

Catalytic oxidation reactions, such as hydrogen sulfide and other acidic gases, typically do not react with oxygen in the air. But can react with oxygen in the air under the catalysis of the plant extract. Taking the reaction of hydrogen sulfide as an example:

R-NH₂+H₂S→R-NH³⁺+SH^-

R-NH₂+SH^-+O₂+H₂O→R-NH₃+SO₄ ^2-+OH^-

R-NH³⁺+OH^-→R-NH₂+H₂O

redox reactions, such as formaldehyde, are oxidative and available molecules in the vegetation liquor are reductive. They can be reacted directly. Reaction with formaldehyde and ammonia:

HR-NH₂+HCHO→R-HN₂+H-C＝CO₂+H₂O

R-NH₂+NH₃→R-NH₂+N₂+H₂O

the microbial degradation device 30 comprises a washing area and a biological trickling filter, and in the process that waste/odor to be treated passes through the biological filler of the deodorization system, odor molecules are diffused to a biological film formed on the surface of the biological filler, and the microorganisms oxidize and decompose the odor molecules, thereby eliminating odor pollution. The waste/odor enters a washing area (pretreatment section) through an inlet in a advection way, and is washed by the front-stage water, and the pretreatment of absorption, dust removal and humidification of the waste/odor water is completed in the washing area. The uncleaned malodorous gas enters a filtering area of a biological trickling filter (biological filter), and when passing through the filtering layer, pollutants are transferred to the surface of a biological membrane from the gas phase:

the deodorization process is mainly divided into the following stages:

1) the first stage is as follows: a gas-liquid diffusion stage, wherein the pollutants are transferred from a gas phase to a liquid phase through a gas-liquid interface of the packing;

2) and a second stage: in the liquid-solid diffusion stage, malodorous substances diffuse to the surface of a microbial film, odor molecules in the waste gas diffuse to the biological film (solid phase) of the biological filler from a liquid phase, and pollutants are adsorbed and absorbed by microbes;

3) and a third stage: in the biological oxidation stage, the microorganisms oxidize and decompose the malodorous substances, and the microorganisms in the biological film formed on the surface of the biological filler oxidize the odor molecules, and simultaneously the biological film can cause the diffusion and absorption of nutrient substances such as nitrogen or phosphorus and oxygen.

Through the three stages, the malodorous substances are degraded by the metabolic activity of microorganisms, and the malodorous substances are oxidized into final products, namely, sulfur-containing malodorous substances are decomposed into S, SO₃ ^2-And SO₄ ^2-(ii) a The malodorous substances containing nitrogen are decomposed into NH₄ ⁺、NO₃ ^-And NO₂ ^-(ii) a The malodorous substances without sulfur or nitrogen are decomposed into CO₂And H₂And O, thereby achieving the purpose of purifying the peculiar smell. The main reaction equation is as follows:

the gas distribution device 40 distributes gas to the odor controller 50, the Vaportek odor controller 50 is a core device, and the Vaportek deodorization membrane is a main deodorization unit. Odor removing particles are uniformly distributed on the surface of the membrane through VP, and the odor is rapidly removed by utilizing the air convection power, and meanwhile, other external substances cannot be sucked, so that the naturalness of the plant extracting solution is kept forever. The deodorizing particles in the waste gas can quickly and actively capture the odor gas molecules in the air and wrap the odor particles. The common odor molecules are mostly small molecular organic matters (esters, alcohols, aromatic hydrocarbons and the like), and also comprise part of inorganic small molecules such as ozone, ammonia, hydrogen sulfide, hydrocarbons and the like, and the odor molecules have high activity on the surface of olfactory cells and strong irritation, and still have strong olfactory pollution capacity even under the premise that the concentration of each odor component reaches the standard and is discharged, namely the odor molecules have the characteristics of low pollution concentration and high odor intensity. Vaportek particles are natural oily deodorized molecules, and the particles are in non-covalent combination with odor molecules through intermolecular nonpolar interaction, so that the molecules are greatly stabilized, and the activity and the irritation of the molecules are reduced. Further, the increase in specific gravity after the binding is solved by the sedimentation effect. The process is different from chemical reaction process to generate a third substance and masking effect, does not cause secondary pollution, and can thoroughly remove odor.

When the waste gas purification device for processing ham or meat cans in the food industry is used, the collected waste gas is conveyed to the pretreatment section for primary treatment under the action of the suction opening, the conveying air pipe and the fan. The concentration of oil smoke and grease in the exhaust gas is reduced by the pretreatment of the suction filter type oil filter 10.

The pretreated flue gas is sent to a primary washing structure (also called primary alkali washing device) of the integrated equipment 20 for treatment, and the circulating liquid of the treatment is NaOH alkali or lime water. The treatment system removes particulate matters, dust, grease and smoke dust in the waste gas; and can remove hydrogen sulfide, acidic waste gas and components which are easy to dissolve in aqueous solution.

The waste gas from the primary alkali washing device is sent to a secondary washing structure (also called secondary alkali washing device) for treatment, and the circulating liquid of the treatment is NaOH alkali or lime water. The treatment system removes the residual particles, dust, grease and smoke dust in the waste gas; and can remove hydrogen sulfide, acidic waste gas and components which are easy to dissolve in aqueous solution.

The waste gas from the secondary alkali washing device is sent to a three-stage washing structure (also called deodorizing liquid washing device) for further treatment. Adding small amount of absorbent (New Bio-C plant extract) into the spray circulation solution. The odorous gas is fully contacted with the New Bio-C plant extract, and the odorous particles in the air or in the water are absorbed and removed by the New Bio-C plant extract. The treatment system can treat part of water-soluble components and biodegradable components in the waste gas, and can effectively reduce the concentration of peculiar smell.

The flue gas after the washing is sprayed to tertiary belongs to the gas-liquid mixture state, for avoiding influencing next processing workshop section, must remove most steam in the gas through the processing of high-efficient dehydration dehumidification layer. Due to the inertia effect of the rising of the waste gas, the water vapor collides with the dehydration layer and is attached to the surface, so that the liquid drops are larger and larger, and the gravity sedimentation is achieved. (the main function is to intercept floccules in the gas and remove most of water vapor in the gas)

The dehydrated waste gas is pumped to the microbial degradation device 30, the gas is firstly introduced into a prewashing tower for washing and humidifying, the prewashed waste gas is uniformly distributed to a biological filter tower, the waste gas enters a biological filter bed after dust removal and humidification, pollutants in the waste gas are contacted with microorganisms and are captured, degraded and oxidized by the microorganisms, so that the pollutants are decomposed into harmless CO2 and H2O and inorganic substances such as sulfuric acid, nitric acid and the like, and the sulfuric acid, nitric acid and the like are decomposed and oxidized into harmless substances by thiobacillus and nitric acid bacteria. When the concentration of the waste gas is very low, the nutrient solution in the nutrient solution circulating tank is delivered to the top of the biological filler bed by the circulating pump and is uniformly sprayed on the biological filler for microorganisms to absorb nutrient substances for growth and propagation. (main function: removal of degradable part of exhaust gas in a part of exhaust gas).

The odor gas pretreated by the previous stages still has the biggest odor pollution problem. At this time, the Vaportek odor controller 50 is adopted, and a medium-low pressure centrifugal fan 60 is used for blowing air (realizing variable frequency control), so that the deodorizing micro-particles in the odor controller 50 are taken away, odor gas molecules in the air are rapidly and actively captured, and the odor particles are wrapped. Vaportek particles are natural oily deodorizing molecules, and the particles are in non-covalent combination with odor molecules through intermolecular nonpolar interaction, so that the molecules are greatly stabilized, the activity and the irritation of the molecules are reduced, and the odor is thoroughly removed. (main function: removal of malodors in exhaust gas to the point of emission).

The treated waste gas reaching the standard is discharged by being led to a height of more than 15 meters through a chimney 70.

The invention also relates to a method for purifying waste gas generated in processing of ham and meat cans in food industry, which comprises the following steps:

primary filtration treatment: in the process that the waste gas passes through the suction filter chip of the suction filter type oil filter 10, most oily particles are adsorbed on the suction filter chip, when residual fine-particle oily molecules pass through the labyrinth type suction filter chip with extremely fine gaps, because the filtration speed is changed rapidly and timely, the fine-particle oily molecules collide violently for many times, and the airflow forms vortexes for many times in the advancing process, so that the fine-particle oily molecules are combined into large-particle molecules to be adhered to the wall of the suction filter chip and are settled under the action of gravity, and the purification is realized;

discharging: the height is increased by more than 15 meters through a chimney 70 for discharging.

Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes should fall within the scope of the claims of the present invention.

Claims

1. The utility model provides a food industry ham, meat jar processing exhaust gas purification device, includes a plurality of connecting pipes, its characterized in that: the waste gas purification device for processing ham and meat cans in the food industry further comprises a suction filtration type oil filter, an integrated device, a microbial degradation device, a gas distribution device and a peculiar smell controller, wherein the suction filtration type oil filter, the integrated device, the microbial degradation device, the gas distribution device and the peculiar smell controller are sequentially communicated through connecting pipes, a primary washing structure, a secondary washing structure, a tertiary washing structure and a dehydration structure are arranged in the integrated device, waste gas is subjected to oil-gas separation from the suction filtration type oil filter and then sequentially enters the primary washing structure, the secondary washing structure and the tertiary washing structure for water washing, the waste gas after water washing is dehydrated through the dehydration structure and then enters the microbial degradation device for degradation, and the degraded waste gas enters the gas distribution device and the peculiar smell controller for thorough deodorization.

2. The waste gas purification device for ham and meat can processing in food industry as claimed in claim 1, wherein: the suction filter comprises a suction filter chip, the suction filter chip adopts an alloy wire filter material, the gap between the filter materials is extremely fine and is in a labyrinth honeycomb type, the filter material is in a three-dimensional net structure, most oily particles can be adsorbed on the suction filter chip in the process that waste gas passes through the suction filter chip, and when residual oily molecules of fine particles pass through the labyrinth type and the gap is extremely fine inside the suction filter chip, because the filtering speed is changed rapidly and time-lapse, the oily molecules of the fine particles collide violently for many times, and the air flow advances for many times to form vortex, so that the oily molecules of the fine particles can be combined into large-particle molecules to be adhered to the wall of the suction filter chip, and are settled under the action of gravity, thereby being purified.

3. The waste gas purification device for ham and meat can processing in food industry as claimed in claim 1, wherein: the first-stage washing structure comprises a cross-flow washing tank, a packed bed positioned in the cross-flow washing tank, a spraying structure positioned at the top of the packed bed and a circulating water tank, wherein in the cross-flow washing tank, waste gas horizontally passes through one or more packed beds to be purified, the packed bed is cleaned from the top, cleaning liquid is sprayed on the top of the packed bed and flows through the packed bed to enter the circulating water tank, and the cleaning liquid is NaOH solution or lime water.

4. The waste gas purification device for ham and meat can processing in food industry as claimed in claim 3, wherein: the secondary washing structure and the primary washing structure have the same structure, and the cleaning liquid is also the same.

5. The waste gas purification device for ham and meat can processing in food industry as claimed in claim 1, wherein: the three-stage washing structure comprises a cross-flow washing tank, a packed bed positioned in the cross-flow washing tank, a spraying structure positioned at the top of the packing and a circulating water tank, wherein in the cross-flow washing tank, waste gas horizontally passes through one or more packed beds to be purified, the packing is cleaned from the top, cleaning liquid is sprayed on the top of the packing and flows through the packing to enter the circulating water tank, and the cleaning liquid is NEW BIO-C deodorant liquid.

6. The waste gas purification device for ham and meat can processing in food industry as claimed in claim 1, wherein: the microbial degradation device comprises a washing area and a biological trickling filter, waste gas firstly enters the washing area through an introducing port in an advection mode, the pretreatment of absorption, dust removal and humidification of the waste gas water is completed in the washing area, the unremoved malodorous gas enters the biological trickling filter, and pollutants are transferred to the surface of a biological membrane from a gas phase when passing through a filter layer.

7. The waste gas purification device for ham and meat can processing in food industry as claimed in claim 1, wherein: the odor distribution device distributes odor to the odor controller, the odor controller comprises a deodorization membrane, odor removing particles are uniformly distributed on the surface of the deodorization membrane, odor removing particles can rapidly and actively capture odor gas molecules in the air and wrap the odor particles to generate non-covalent bonding, and the odor particles are settled due to the increase of specific gravity after bonding.

8. A method for purifying waste gas generated in processing of ham and meat cans in food industry is characterized by comprising the following steps: