CN211189578U - Sewage treatment plant sludge drying exhaust gas purification device - Google Patents
Sewage treatment plant sludge drying exhaust gas purification device Download PDFInfo
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- CN211189578U CN211189578U CN201921521303.2U CN201921521303U CN211189578U CN 211189578 U CN211189578 U CN 211189578U CN 201921521303 U CN201921521303 U CN 201921521303U CN 211189578 U CN211189578 U CN 211189578U
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- sludge drying
- exhaust gas
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- Treating Waste Gases (AREA)
Abstract
The utility model discloses a sewage treatment plant sludge drying exhaust gas purification device, including a plurality of connecting pipes, cyclone and integration equipment, through the connecting pipe intercommunication between cyclone and the integration equipment, the integration equipment is inside to spray the structure including the one-level, the second grade sprays structure and compound photocatalysis structure, and waste gas gets into the integration equipment after the cyclone gets into the dust from the connecting pipe, sprays the structure through the one-level in proper order and the second grade sprays the structure and wash, and waste gas dehydration after the washing gets into compound photocatalysis structure and decomposes the organic matter. Has good purification effect on waste gas with large air quantity, low concentration, high temperature and large amount of protein-containing dust, and discharges dust and H in the air outlet after treatment2S、NH3The monitoring indexes of methyl mercaptan, methyl sulfide, methyl disulfide and odor concentration are far lower than the environmental emission standard.
Description
Technical Field
The utility model relates to a waste gas purification especially relates to a sewage treatment plant sludge drying exhaust gas purification device.
Background
The sludge drying waste gas in the sewage treatment plant has complex components, high pollution intensity of discharged flue gas, large discharge amount of waste gas and complex and variable pollution components, particularly, foul 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.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to provide a sewage treatment plant sludge drying waste gas purification device which can aim at the characteristics of sewage treatment plant sludge drying waste gas diversity, variability, high pollution concentration, large treatment capacity and the like.
The purpose of the utility model is realized by adopting the following technical scheme:
the utility model provides a sewage treatment plant sludge drying exhaust gas purification device, includes a plurality of connecting pipes, cyclone and integration equipment, cyclone with pass through between the integration equipment the connecting pipe intercommunication, the inside one-level that includes of integration equipment sprays structure, second grade and sprays structure and compound photocatalysis structure, and waste gas follows the connecting pipe gets into after cyclone gets rid of the dust get into integration equipment passes through in proper order the one-level sprays the structure and the second grade sprays the structure and washes, and the waste gas dehydration after the washing gets into compound photocatalysis structure decomposes the organic matter.
Furthermore, the cyclone dust collector comprises an air inlet pipe, a cylinder and a central exhaust pipe, dust-containing airflow enters the cylinder from the air inlet pipe along the tangential direction, downward spiral motion is carried out between the cylinder and the central exhaust pipe, dust particles slide down along the inner wall in a rotating manner, and gas is discharged from the upper end of the central exhaust pipe.
Furthermore, the primary spraying 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 is purified after horizontally passing through one or more packed beds, the packed bed is cleaned from the top, and cleaning liquid is sprayed on the top of the packed bed and enters the circulating water tank after flowing through the packed bed.
Further, NaOH solution or lime water is added into the circulating water tank.
Furthermore, the secondary spraying 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 is purified after horizontally passing through one or more packed beds, the packed bed is cleaned from the top, and cleaning liquid is sprayed on the top of the packed bed and enters the circulating water tank after flowing through the packed bed.
Furthermore, NEW BIO-C deodorant liquid is added into the circulating water tank.
Further, the composite photocatalytic structure comprises a pretreatment section, the pretreatment section comprises a plurality of modularized composite fibers, and the composite fibers adsorb harmful chemical gases in waste gases.
Further, the composite photocatalytic structure comprises a composite photocatalytic section, the composite photocatalytic section comprises a high-energy ultraviolet lamp, and waste gas is irradiated by a high-energy ultraviolet lamp beam to decompose organic matters.
Further, the ultraviolet wavelength of the high-energy ultraviolet lamp is 182nm, 254nm or 365 nm.
Compared with the prior art, the utility model discloses sewage treatment plant sludge drying waste gas purification device to sewage treatment plant sludge drying waste gas diversity, variability, the pollution concentration height and handle characteristics such as the amount of wind is big, targeted selection processing technology to guarantee waste gas after, can discharge to reach standard.
1. The sludge drying waste gas purification device of the sewage treatment plant is convenient to install and occupies small area on site;
2. the operation process of the sludge drying waste gas purification device of the sewage treatment plant is safe, stable and reliable, and the operation and the 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.
Drawings
FIG. 1 is a perspective view of the sludge drying waste gas purification device of the sewage treatment plant of the present invention;
FIG. 2 is a process diagram of the sludge drying waste gas purification device of the sewage treatment plant.
In the figure: 10. a cyclone dust collector; 20. an integration device; 30. a medium-low pressure centrifugal fan; 40. and (4) a chimney.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to 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 sludge drying exhaust gas purifying apparatus of a sewage treatment plant of the present invention includes a cyclone 10, an integrated device 20, a middle and low pressure centrifugal fan 30, a chimney 40 and a plurality of connecting pipes. The cyclone dust collector 10, the integrated equipment 20, the medium-low pressure centrifugal fan 30 and the chimney 40 are communicated in sequence through connecting pipes.
The cyclone dust collector 10 separates dust particles from air flow according to the magnitude of inertial centrifugal force generated by cyclone air flow on the dust particles and the air. The dusty gas flow enters the cylinder tangentially from the inlet pipe at a speed of 12-25m/s and spirals downwards between the cylinder and the central outlet pipe. Inertial centrifugal forces are generated during the inversion process. The dust particles are influenced by the motion of the airflow in one direction and rotate and descend in the airflow; the other direction is gradually diffused outward to approach the cylinder wall under the action of centrifugal force. Finally, the dust comes into collision with the inner wall of the outer cylinder, slides down along the inner wall in a rotating way, is collected at the dust discharge port at the bottom of the middle part and is discharged from the dust discharge port. The gas is turned to the center of the dust remover along with the conical contraction due to small mass and little action of centrifugal force, and rises under the action of bottom resistance to form a rising rotational flow which is discharged from the upper end of the exhaust pipe, thereby realizing the dust removing action.
The integrated device 20 comprises a primary spraying structure, a secondary spraying structure and a composite photocatalytic structure.
The primary spray 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 flowsAnd the filler enters a circulating water tank. 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＝S2-+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 spray structure comprises 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. 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 composite photocatalysis structure is divided into an efficient pretreatment section and a composite photocatalysis section which are usually integrated, so that the occupied area and the installation workload can be effectively reduced. The high-efficiency pretreatment section is mainly formed by combining modularized professional composite fibers and mainly used for treating each component of waste gas so as to adsorb and remove harmful chemical gas in the waste gas, reduce the pressure of rear-end treatment and improve the waste gas treatment efficiency.
Ultraviolet lamp with specific wavelength is used as light energy donor for photocatalytic oxidation, and the photocatalyst nano particle can be excited to generate electron-hole pair and hole decomposing catalyst under the irradiation of ultraviolet light with certain wavelength. TiO22Photocatalytic oxygenThe chemical groups are active hydroxyl groups (. OH) and other active oxidizing species (. O)2-，·OOH，H2O2) The result of the combined action. In TiO2The OH group generated on the surface has high reactivity and reaction energy higher than that of various chemical bond energies in organic matters, and is added with O2 -，·OOH，H2O2The synergistic effect of the active oxidation substances can quickly and effectively decompose the organic substances.
The rough reaction mechanism is:
H2S+O2、O2-、O2+→SO3+H2O
NH3+O2、O2-、O2+→NOx+H2O
VOCs+O2、O2-、O2+→SO3+CO2+H2O
the ultraviolet wavelength of the high-energy ultraviolet lamp is 182nm, 254nm or 365 nm.
When the sludge drying waste gas purification device of the sewage treatment plant is used, the collected waste gas is sent to the cyclone dust collector 10 under the action of the suction port, the conveying air pipe and the fan, the dusty air flow rotates at a high speed, and the particles are separated from the air flow and collected under the action of centrifugal force. The primary function of the present-stage processing system is as follows: removing floccules, particles, dust and smoke dust in the waste gas.
The waste gas treated by the cyclone dust collector 10 is sent to a first-stage spraying structure (also called as an alkali liquor washing device) of the integrated equipment 20 for treatment, and the circulating liquid of the treatment is NaOH alkali liquor 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 lye washing device is sent to a secondary spraying structure (also called as a deodorization liquid washing device) of the integrated equipment 20 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 two-stage spraying and washing belongs to a gas-liquid mixing state, and most of water vapor in the gas needs to be removed through treatment of a high-efficiency dehydration and dehumidification layer in order to avoid influencing the next treatment working section. When the mist-laden gas rises through the spray scrubbing layer at a certain speed, the mist collides with the chemical scrubbing layer and is attached to the surface of the chemical scrubbing layer due to the inertia effect of the rising mist. The dispersion of the mist on the surface of the chemical cleaning layer and the gravity sedimentation of the mist enable the mist to form larger liquid drops which flow to the junction of the two filaments along the chemical cleaning layer. The wettability of the chemical washing layer, the surface tension of the liquid and the capillary action of the chemical washing layer enable the liquid drops to be larger and larger, 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. The gas is substantially free of entrainment after passing through the chemical scrubbing unit.
The mist in the gas is separated to improve the operation condition, optimize the process index, reduce the corrosion of the equipment, prolong the service life of the equipment, increase the treatment capacity, recover valuable materials, protect the environment, reduce the atmospheric pollution and the like.
The structure is simple, the volume is small, the efficiency of dust removal and dehydration is high, the resistance is small, the weight is light, the installation, the operation and the maintenance are convenient, and the collection efficiency of the chemical washing device reaches 98 to 99.8 percent for the mist with the particle size of more than or equal to 3 to 5 um. (the main function is to intercept floccules in the gas and remove most of water vapor in the gas)
The photocatalytic oxidation of the dehydrated exhaust gas to form TiO2 under the lamp irradiation of the high-energy ultraviolet lamp beam is the result of the combined action of active hydroxyl groups (. OH) and other active oxidizing species (. O2-,. OOH, H2O 2). OH groups generated on the surface of TiO2 have high reactivity and higher reaction energy than various chemical bond energies in organic matters, and can quickly and effectively decompose the organic matters by the synergistic effect of O2-,. OOH and H2O2 active oxidation substances. (main function: removing easily decomposed and oxidized exhaust gas components (benzene, toluene, xylene, non-methane total hydrocarbons, VOCs, etc. and having good disinfection and deodorization effects) in a part of the exhaust gas;
the treated waste gas reaching the standard is led to be higher by more than 15 meters through a chimney 40 and is discharged.
Compared with the prior art, the utility model discloses sewage treatment plant sludge drying waste gas purification device to sewage treatment plant sludge drying waste gas diversity, variability, the pollution concentration height and handle characteristics such as the amount of wind is big, targeted selection processing technology to guarantee waste gas after, can discharge to reach standard.
1. The sludge drying waste gas purification device of the sewage treatment plant is convenient to install and occupies small area on site;
2. the operation process of the sludge drying waste gas purification device of the sewage treatment plant is safe, stable and reliable, and the operation and the 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.
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 are intended to fall within the scope of the claims.
Claims (9)
1. The utility model provides a sewage treatment plant sludge drying exhaust gas purification device, includes a plurality of connecting pipes, its characterized in that: sewage treatment plant sludge drying exhaust gas purification device still includes cyclone and integrated equipment, cyclone with pass through between the integrated equipment the connecting pipe intercommunication, the integrated equipment is inside to spray structure, second grade including the one-level and spray structure and compound photocatalysis structure, and waste gas follows the connecting pipe gets into after cyclone gets rid of the dust get into the integrated equipment passes through in proper order the one-level sprays the structure and the second grade sprays the structure and washes, and the waste gas dehydration after the washing gets into compound photocatalysis structure decomposes the organic matter.
2. The sludge drying exhaust gas purification device of the sewage treatment plant according to claim 1, characterized in that: the cyclone dust collector comprises an air inlet pipe, a cylinder and a central exhaust pipe, dust-containing airflow enters the cylinder from the air inlet pipe along the tangential direction, the cylinder and the central exhaust pipe make downward spiral motion, dust particles slide down along the inner wall in a rotating manner, and gas is discharged from the upper end of the central exhaust pipe.
3. The sludge drying exhaust gas purification device of the sewage treatment plant according to claim 1, characterized in that: the first-stage spraying 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, and cleaning liquid is sprayed on the top of the packed bed and flows through the packed bed to enter the circulating water tank.
4. The sludge drying exhaust gas purification device of the sewage treatment plant according to claim 3, characterized in that: and NaOH solution or lime water is added into the circulating water tank.
5. The sludge drying exhaust gas purification device of the sewage treatment plant according to claim 1, characterized in that: the secondary spraying 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, and cleaning liquid is sprayed on the top of the packed bed and flows through the packed bed to enter the circulating water tank.
6. The sludge drying exhaust gas purification device of the sewage treatment plant according to claim 4, characterized in that: NEW BIO-C deodorant liquid is added into the circulating water tank.
7. The sludge drying exhaust gas purification device of the sewage treatment plant according to claim 1, characterized in that: the composite photocatalytic structure comprises a pretreatment section, wherein the pretreatment section comprises a plurality of modularized composite fibers, and the composite fibers adsorb harmful chemical gases in waste gases.
8. The sludge drying exhaust gas purification device of the sewage treatment plant according to claim 6, characterized in that: the composite photocatalytic structure comprises a composite photocatalytic section, the composite photocatalytic section comprises a high-energy ultraviolet lamp, and waste gas is irradiated by a high-energy ultraviolet lamp beam to decompose organic matters.
9. The sludge drying exhaust gas purification device of the sewage treatment plant according to claim 8, characterized in that: the ultraviolet wavelength of the high-energy ultraviolet lamp is 182nm, 254nm or 365 nm.
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| CN112792088A (en) * | 2020-11-02 | 2021-05-14 | 深圳市朗坤环境集团股份有限公司 | Comprehensive utilization method of biomass in ecological environment park |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112792088A (en) * | 2020-11-02 | 2021-05-14 | 深圳市朗坤环境集团股份有限公司 | Comprehensive utilization method of biomass in ecological environment park |
| CN112792088B (en) * | 2020-11-02 | 2023-08-08 | 深圳市朗坤环境集团股份有限公司 | Comprehensive utilization method of biomass in ecological environment garden |
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