CN108211611B - Processing system of spray drying tower tail gas - Google Patents

Processing system of spray drying tower tail gas Download PDF

Info

Publication number
CN108211611B
CN108211611B CN201611191042.3A CN201611191042A CN108211611B CN 108211611 B CN108211611 B CN 108211611B CN 201611191042 A CN201611191042 A CN 201611191042A CN 108211611 B CN108211611 B CN 108211611B
Authority
CN
China
Prior art keywords
gas
spray drying
drying tower
water
tail gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201611191042.3A
Other languages
Chinese (zh)
Other versions
CN108211611A (en
Inventor
徐万福
傅伟松
陈华祥
徐斌
王永
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZHEJIANG DIBANG CHEMICAL CO Ltd
Original Assignee
ZHEJIANG DIBANG CHEMICAL CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ZHEJIANG DIBANG CHEMICAL CO Ltd filed Critical ZHEJIANG DIBANG CHEMICAL CO Ltd
Priority to CN201611191042.3A priority Critical patent/CN108211611B/en
Publication of CN108211611A publication Critical patent/CN108211611A/en
Application granted granted Critical
Publication of CN108211611B publication Critical patent/CN108211611B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/007—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by irradiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/32—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by electrical effects other than those provided for in group B01D61/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/76—Gas phase processes, e.g. by using aerosols
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/10—Oxidants
    • B01D2251/104—Ozone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/80—Type of catalytic reaction
    • B01D2255/802—Photocatalytic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
    • B01D2259/804—UV light
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F2003/001—Biological treatment of water, waste water, or sewage using granular carriers or supports for the microorganisms

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Microbiology (AREA)
  • Biomedical Technology (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Hydrology & Water Resources (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Toxicology (AREA)
  • Dispersion Chemistry (AREA)
  • Treating Waste Gases (AREA)

Abstract

The invention discloses a treatment system for tail gas of a spray drying tower, which comprises a cyclone device, a bag-type dust collector, a water spray tower device, a heat exchanger, a cooling device, a water-gas separator and a heating device, wherein the tail gas of the spray drying tower is introduced into the cyclone device, is input into the bag-type dust collector through the cyclone device, enters the water spray tower device through the bag-type dust collector, is input into the heat exchanger after being treated by the water spray tower device, enters the cooling device after being subjected to heat exchange through the heat exchanger, is input into the gas-water separator after being cooled by the cooling device, returns to the heat exchanger through a blower to be preheated after being separated by the gas-water separator, is input into the heating device after being preheated by the heat exchanger, and returns to the spray. The treatment system realizes the recycling of the waste gas of the dye spray drying tower and the effective utilization of energy, and greatly reduces the pollution of the waste gas to the environment; the gas is subjected to heat exchange, and the energy is effectively utilized.

Description

Processing system of spray drying tower tail gas
Technical Field
The invention belongs to the technical field of waste gas treatment, and particularly relates to a treatment system for tail gas of a spray drying tower.
Background
At present, the dye industry adopts a hot air drying tower to dry the dye to prepare a powdery finished dye, so that the dye is convenient to store and transport. Dye drying tower: mainly, air is heated and enters an air distributor at the top of the dryer, and the hot air uniformly enters the drying chamber in a spiral shape. The feed liquid is sprayed into superfine mist liquid beads by a high-speed centrifugal atomizer or a high-pressure atomizer at the top of the tower body, and the liquid beads are in parallel flow contact with air and can be dried into finished products in a short time. The finished product is continuously output from the bottom of the drying tower and the cyclone separator, the dust material is collected by the pulse bag collector, and the waste gas is exhausted by the fan.
The waste gas exhausted by the fan is the waste gas of the dye drying tower, and the main components of the waste gas are residual methylnaphthalene, naphthalene, formaldehyde and other organic pollutants in the dispersing agent added in the dye post-treatment process. Because the waste gas of the drying tower has large air quantity, high humidity, heavy odor and great treatment difficulty, and causes certain influence on the environment, at present, no mature effective method for treating the waste gas of the drying tower exists, so the treatment of the waste gas of the dye drying tower becomes one of the problems which are urgently solved by the dye industry.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a treatment system for tail gas of a spray drying tower.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a processing system of spray drying tower tail gas, processing system includes cyclone, sack cleaner, water spray tower device, heat exchanger, cooling device, water gas separator and heating device, spray drying tower tail gas lets in cyclone, inputs to the sack cleaner through cyclone, gets into water spray tower device through the sack cleaner, inputs to the heat exchanger after water spray tower device handles in, gets into cooling device after the heat exchanger heat transfer, inputs to gas-water separator after cooling device cools off, and gas portion returns to the heat exchanger through the air-blower after gas-water separator separation and preheats, inputs heating device after preheating through the heat exchanger, returns to spray drying tower after heating device heats.
The main components of the tail gas of the spray drying tower are methyl naphthalene, formaldehyde, sulfamic acid and other organic pollutants which are remained in a dispersing agent added in the dye post-treatment process, the exhaust temperature is 40-60 ℃, and the dust content is 5-20 mg/M3The dimensionless malodor is 600-4000.
The treatment system also comprises a waste gas decomposition device, tail gas to be treated is divided into an air flow I and an air flow II after passing through the bag-type dust collector, and the air flow I is heated by the heating device after being treated by the waste gas decomposition device and returns to the spray drying tower; and the gas flow II enters a water spray tower device, is treated by the water spray tower device and then enters a heat exchanger for energy conversion, is further cooled by a cooling device and then is input to a gas-water separator for gas-water separation, and the gas part returns to the heat exchanger for preheating and then is heated by a heating device and returns to the spray drying tower.
Preferably, the flow rate of the air flow I accounts for 10-90% of the total flow rate of the tail gas of the spray drying tower. Further preferably, the flow of the air flow I accounts for 15-50% of the total flow of the tail gas of the spray drying tower, under the proportion, the treatment effect of the tail gas is good, the system achieves dynamic balance, pollution factors are not accumulated any more, and the treatment cost is low.
Preferably, the waste gas decomposition device comprises a water eliminator, an electrostatic precipitator, a gaseous molecular resonance processor and an ultraviolet machine which are connected in sequence. The waste gas decomposition device can decompose odor and toxic gas into nontoxic and tasteless gas by using resonance quantum synergistic technology, can kill bacteria in tail gas and remove dust in the tail gas, and the dimensionless malodor of the treated waste gas reaches below 200.
The gaseous molecular resonance processor generates a large amount of active groups by using a resonance quantum cooperation technology through a high-energy electronic exciter, and performs complex physical and chemical reactions with pollutants in the waste gas; according to the characteristic that the odor-emitting functional group can generate excitation by absorbing the characteristic wavelength, the pollutant molecules can be efficiently removed by regulating and controlling photon energy, and the odor-emitting group can be selectively absorbed by regulating and adjusting an ultraviolet light source to excite an odor-emitting substance.
As another scheme, the waste gas decomposition device comprises a filtering unit, a catalytic degradation unit and an ozone decomposition unit which are sequentially connected, and by utilizing ultraviolet decomposition and ozone oxidation technologies, ultraviolet light beams and ozone are applied to carry out a synergistic decomposition oxidation reaction on gas to be treated, so that odorous substances are degraded and converted into low molecular compounds, water and carbon dioxide, and then the low molecular compounds, the water and the carbon dioxide are discharged outdoors through an exhaust pipeline, and the dimensionless stink of the treated waste gas reaches below 300.
The catalytic degradation unit generates ozone by using ultraviolet decomposition and ozone oxidation technologies and carries out photocatalysis so as to catalyze and degrade the filtered waste gas; the ozone decomposition unit is used for purifying residual ozone after treatment.
And the gas flow II is treated by the water spray tower device and then enters the heat exchanger for energy conversion, is further cooled by the cooling device and then is subjected to gas-water separation, the gas part is used as a low-temperature heat exchange medium of the heat exchanger, and is heated by the heating device after returning to the heat exchanger for preheating, so that the gas part can return to the spray drying tower, and the cyclic utilization and the effective utilization of energy of waste gas of the spray drying tower are realized.
Air current II is handled through water spray tower device, and organic pollutant is condensed, and the waste water COD concentration after the water spray tower device replacement is higher, as preferred, processing system still includes biochemical pond, get into biochemical pond after the waste water that waste water after the replacement and gas-water separation obtained in the water spray tower device merge and carry out retrieval and utilization behind the biochemical treatment, realize the cyclic utilization of waste water.
Preferably, the biochemical treatment adopts a biological aerated filter method.
The filler of the biological aerated filter comprises one or more of coke, activated carbon, bentonite, kaolin, quartz sand, ceramsite and zeolite.
The microorganisms in the biological aerated filter comprise one or more of rhizoctonia, xanthomonas, pseudomonas acidovorans, thiobacillus thioparus, thiobacillus thiooxidans, bacillus cereus, aerobacter, nitrobacter and denitrifying bacillus.
Preferably, the microorganisms in the biological aerated filter are cultured and screened under the environmental condition of the wastewater replaced by the water spray tower device, and the specific condition parameters are controlled to be water temperature of 25-35 ℃, pH of 6-8, activated sludge concentration of 2-5 g/L and dissolved oxygen concentration of 2.0-4.0 mg/L.
Furthermore, in the biological aerated filter, the aeration rate is controlled to be 2.0-4.0 mg/L, and the system residence time is 12-48 h, so that the treatment liquid reaches the industrial water recycling standard and is recycled to a water spraying device.
Compared with the prior art, the invention has the following beneficial effects:
(1) the tail gas of the spray drying tower is treated by two parts, one part is treated by a waste gas decomposition device and then returns to the spray drying tower, and the other part is recycled, so that the environmental pollution caused by the waste gas is greatly reduced by utilizing the synergistic effect of the two parts;
(2) the gas is recycled through heat exchange, the energy is effectively utilized, and the generated wastewater is subjected to biochemical treatment and regeneration recycling;
(3) the deodorization efficiency of the tail gas treated by the waste gas decomposition device can reach more than 99 percent, toxic and harmful substances in the malodorous gas are thoroughly decomposed, harmless emission is achieved, secondary pollution is not generated, meanwhile, the effect of efficient disinfection and sterilization is achieved, the deodorization effect exceeds the national first-level standards (GB14554-93) for malodorous pollutant emission, and no odor can be smelled within a specified distance.
Drawings
FIG. 1 is a schematic diagram of a spray drying tower tail gas treatment system of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Example 1
As shown in figure 1, a treatment system for tail gas of a spray drying tower is provided, the tail gas of the spray drying tower is discharged from the spray drying tower 1, the temperature of the tail gas is 52 ℃, and the dust content is 10mg/M3The dimensionless malodor is 800.
Tail gas is handled through cyclone 2, sack dust collector 3, retrieves the dyestuff product in the gas, and tail gas divide into air current I and air current II (the flow of air current I accounts for 10% of tail gas total flow), and air current I is heated to 103 ℃ through heating device 8 after the treatment of exhaust gas decomposition device 10 and is returned spray drying tower 1, exhaust gas decomposition device is including the water eliminator, electrostatic precipitator, gaseous molecular resonance processor and the ultraviolet ray machine that connect gradually, and air current I is handled the back, and dust content is not detected, and the non-dimensional foul is 75.
And continuously conveying the airflow II to a water spray tower device 4 to further remove pollutants in the waste gas, wherein the temperature is 43 ℃, then performing energy conversion through a 2-stage heat exchanger 5, cooling to 30 ℃ through a cooling device 6, separating gas through a gas-water separator 7 after cooling to be used as a low-temperature heat exchange medium of the heat exchanger 5, preheating through the heat exchanger 5 through a blower, heating to 105 ℃ through a heating device 8, converging with the airflow I and returning to the spray drying tower 1, realizing the cyclic utilization and the effective utilization of energy of the waste gas of the dye spray drying tower, wherein the dust content of the converged airflow is not detected, and the dimensionless stink is 255.
Simultaneously, the cooled wastewater separated by the gas-water separator 7 and the wastewater replaced by the water spraying device 4 are intensively pumped to a biochemical pool 9, the COD of the inlet water is 2050mg/L, the water temperature is controlled to be 30 ℃, the pH value is 7.0, the concentration of the activated sludge is 3.5g/L, the concentration of the dissolved oxygen is 3.5mg/L, and after 24 hours of aeration, the COD of the outlet water is less than or equal to 50mg/L, NH3N is less than or equal to 10mg/L, aniline is less than or equal to 1.0mg/L, the aniline reaches the recycling standard, and the aniline is recycled to the water spray tower device 4 for use, so that the recycling of the wastewater is realized.
Example 2
As shown in figure 1, a treatment system of tail gas of a spray drying tower is provided, the tail gas of the spray drying tower flows out of the spray drying tower 1, the temperature of the tail gas is 60 ℃, and the dust content is 6mg/M3The dimensionless malodor is 1200.
Tail gas is handled through cyclone 2, sack dust collector 3, retrieves the dyestuff product in the gas, and tail gas divide into air current I and air current II (the flow of air current I accounts for 35% of tail gas total flow), and air current I is heated to 100 ℃ through heating device 8 and is returned spray drying tower 1 after the waste gas decomposition device 10 is handled, waste gas decomposition device is including the water eliminator, electrostatic precipitator, gaseous state molecular resonance processor and the ultraviolet ray machine that connect gradually, and air current I is handled the back, and dust content is not examined, and the non-dimensional foul is 80.
And continuously conveying the airflow II to a water spray tower device 4 to further remove pollutants in the waste gas, wherein the temperature is 45 ℃, then performing energy conversion through a 2-stage heat exchanger 5, cooling to 29 ℃ through a cooling device 6, separating gas through a gas-water separator 7 after cooling to be used as a low-temperature heat exchange medium of the heat exchanger 5, preheating through the heat exchanger 5 through a blower, heating to 101 ℃ through a heating device 8, converging with the airflow I and returning to the spray drying tower 1, realizing the cyclic utilization and the effective utilization of energy of the waste gas of the dye spray drying tower, wherein the dust content of the converged airflow is not detected, and the dimensionless malodor is 237.
Meanwhile, the cooled wastewater separated by the gas-water separator 7 and the wastewater replaced by the water spraying device 4 are collectively pumped to a biochemical pool 9, the COD of the inlet water is 2520mg/L, the water temperature is controlled to be 27 ℃, the pH value is 7.5, the concentration of the activated sludge is 3.3g/L, and the concentration of the dissolved oxygen is 3.0mg/L, after aeration is carried out for 22 hours, the COD of the outlet water is less than or equal to 50mg/L, NH3-N and less than or equal to 10mg/L, and aniline is less than or equal to 1.0mg/L, so that the recycling standard is reached, and the outlet water is recycled to the water spraying tower device 4 for use, so that the recycling.
Example 3
As shown in figure 1, a treatment system of tail gas of a spray drying tower is provided, the tail gas of the spray drying tower flows out of the spray drying tower 1, the temperature of the tail gas is 46 ℃, and the dust content is 16mg/M3The dimensionless malodor is 3500.
The tail gas is treated by the cyclone device 2 and the cloth bag dust removal device 3, dye products in the gas are recovered, the tail gas is divided into an air flow I and an air flow II (the flow of the air flow I accounts for 60% of the total flow of the tail gas), the air flow I is heated to 103 ℃ by the heating device 8 after being treated by the waste gas decomposition device 10 and returns to the spray drying tower 1, the waste gas decomposition device comprises a water eliminator, an electrostatic dust remover, a gaseous molecular resonance processor and an ultraviolet light machine, the dust content is not detected after the air flow I is treated, and the dimensionless stink is 105.
And continuously conveying the airflow II to a water spray tower device 4 to further remove pollutants in the waste gas, wherein the temperature is 35 ℃, then performing energy conversion through a 2-stage heat exchanger 5, cooling to 26 ℃ through a cooling device 6, separating gas through a gas-water separator 7 after cooling to be used as a low-temperature heat exchange medium of the heat exchanger 5, preheating through the heat exchanger 5 through a blower, heating to 104 ℃ through a heating device 8, converging with the airflow I and returning to the spray drying tower 1, realizing the cyclic utilization and the effective utilization of energy of the waste gas of the dye spray drying tower, wherein the dust content of the converged airflow is not detected, and the dimensionless odor is 212.
Meanwhile, the cooled wastewater separated by the gas-water separator 7 and the wastewater replaced by the water spraying device 4 are collectively pumped to a biochemical pool 9, the COD of the inlet water is 2980mg/L, the water temperature is controlled to be 27 ℃, the pH value is 7.5, the concentration of the activated sludge is 3.6g/L, and the concentration of the dissolved oxygen is 3.7mg/L, after 24 hours of aeration, the COD of the outlet water is less than or equal to 50mg/L, NH3-N and less than or equal to 10mg/L, and the aniline is less than or equal to 1.0mg/L, so that the recycling standard is reached, and the outlet water is recycled to the water spraying tower device 4 for use, thereby realizing the recycling of the.
Example 4
As shown in figure 1, a treatment system of tail gas of a spray drying tower is provided, the tail gas of the spray drying tower flows out of the spray drying tower 1, the temperature of the tail gas is 60 ℃, and the dust content is 6mg/M3The dimensionless malodor is 1200.
The tail gas is treated by the cyclone device 2 and the cloth bag dust removal device 3, dye products in the gas are recovered, the tail gas is divided into an airflow I and an airflow II (the flow of the airflow I accounts for 35% of the total flow of the tail gas), the airflow I is treated by the waste gas decomposition device 10 and then heated by the heating device 8 to 100 ℃ to return to the spray drying tower 1, the waste gas decomposition device comprises a filtering unit, a catalytic degradation unit and an ozone decomposition unit which are sequentially connected, after the airflow I is treated, the dust content is not detected, and the dimensionless malodor is 110.
And continuously conveying the airflow II to a water spray tower device 4 to further remove pollutants in the waste gas, wherein the temperature is 45 ℃, then performing energy conversion through a 2-stage heat exchanger 5, cooling to 29 ℃ through a cooling device 6, separating gas through a gas-water separator 7 after cooling to be used as a low-temperature heat exchange medium of the heat exchanger 5, preheating through the heat exchanger 5 through a blower, heating to 101 ℃ through a heating device 8, converging with the airflow I and returning to the spray drying tower 1, realizing the cyclic utilization and the effective utilization of energy of the waste gas of the dye spray drying tower, wherein the dust content of the converged airflow is not detected, and the dimensionless stink is 252.
Meanwhile, the cooled wastewater separated by the gas-water separator 7 and the wastewater replaced by the water spraying device 4 are collectively pumped to a biochemical pool 9, the COD of the inlet water is 2550mg/L, the water temperature is controlled to be 27 ℃, the pH value is 7.5, the concentration of the activated sludge is 3.3g/L, the concentration of the dissolved oxygen is 3.0mg/L, after 22 hours of aeration, the COD of the outlet water is less than or equal to 50mg/L, NH3-N and less than or equal to 10mg/L, and the aniline is less than or equal to 1.0mg/L, so that the recycling standard is reached, and the outlet water is recycled to the water spraying tower device 4 for use, so that the recycling of the wastewater.
Example 5
As shown in figure 1, a treatment system of tail gas of a spray drying tower is provided, the tail gas of the spray drying tower flows out of the spray drying tower 1, the temperature of the tail gas is 55 ℃, and the dust content is 5mg/M3The dimensionless malodor is 800.
The tail gas is treated by the cyclone device 2 and the cloth bag dust removal device 3, dye products in the gas are recovered, the tail gas is continuously conveyed to the water spray tower device 4, pollutants in the waste gas are further removed, the temperature is 45 ℃, the tail gas is subjected to energy conversion by the 2-stage heat exchanger 5, then is cooled to 32 ℃ by the cooling device 6, after being cooled, the gas is separated by the gas-water separator 7 to be used as a low-temperature heat exchange medium of the heat exchanger 5, and after being preheated by the heat exchanger 5 by the blower, the gas is heated to 101 ℃ by the heating device 8 and returns to the spray drying tower 1, so that the recycling of the waste gas of the dye spray drying tower and the effective utilization of the energy are realized, after treatment, the dust content of the gas.
Simultaneously, the cooled wastewater separated by the gas-water separator 7 and the wastewater replaced by the water spraying device 4 are intensively pumped to a biochemical pond 9, the COD of the inlet water is 2120mg/L, the water temperature is controlled at 30 ℃, the pH value is 7.0, the concentration of the activated sludge is 3.6g/L, the concentration of the dissolved oxygen is 3.2mg/L, and after 24 hours of aeration, the COD of the outlet water is less than or equal to 50mg/L, NH3N is less than or equal to 10mg/L, aniline is less than or equal to 1.0mg/L, the aniline reaches the recycling standard, and the aniline is recycled to the water spray tower device 4 for use, so that the recycling of the wastewater is realized.

Claims (8)

1. A treatment system for tail gas of a spray drying tower is characterized by comprising a cyclone device, a bag-type dust collector, a water spray tower device, a heat exchanger, a cooling device, a water-gas separator and a heating device, wherein the tail gas of the spray drying tower is introduced into the cyclone device, is input into the bag-type dust collector through the cyclone device, enters the water spray tower device through the bag-type dust collector, is input into the heat exchanger after being treated by the water spray tower device, enters the cooling device after being subjected to heat exchange through the heat exchanger, is input into the gas-water separator after being cooled by the cooling device, returns to the heat exchanger through a blower to be preheated after being separated by the gas-water separator, is input into the heating device after being preheated by the heat exchanger, and returns to the spray drying tower;
the treatment system also comprises a waste gas decomposition device, tail gas to be treated is divided into an air flow I and an air flow II after passing through the bag-type dust collector, and the air flow I is heated by the heating device after being treated by the waste gas decomposition device and returns to the spray drying tower; and the gas flow II enters a water spray tower device, is treated by the water spray tower device and then enters a heat exchanger for energy conversion, is further cooled by a cooling device and then is input to a gas-water separator for gas-water separation, and the gas part returns to the heat exchanger for preheating and then is heated by a heating device and returns to the spray drying tower.
2. The system for treating the tail gas of the spray drying tower according to claim 1, wherein the flow rate of the gas flow I is 10-90% of the total flow rate of the tail gas of the spray drying tower.
3. The spray drying tower tail gas treatment system according to claim 1, wherein the waste gas decomposition device comprises a water eliminator, an electrostatic precipitator, a gaseous molecular resonance processor and an ultraviolet machine which are connected in sequence.
4. The spray drying tower tail gas treatment system according to claim 1, wherein the exhaust gas decomposition device comprises a filtering unit, a catalytic degradation unit and an ozone decomposition unit which are connected in sequence.
5. The system for treating the tail gas of the spray drying tower according to claim 1, further comprising a biochemical pond, wherein the wastewater after replacement in the water spray tower device is combined with the wastewater obtained by gas-water separation and then enters the biochemical pond for biochemical treatment.
6. The spray drying tower tail gas treatment system according to claim 5, wherein the biochemical treatment is a biological aerated filter method.
7. The system for treating tail gas of a spray drying tower according to claim 6, wherein the filler of the biological aerated filter comprises one or more of coke, activated carbon, bentonite, kaolin, quartz sand, ceramsite and zeolite.
8. The system for treating tail gas of a spray drying tower according to claim 6, wherein the microorganisms in the biological aerated filter comprise one or more of the genera Microbacterium, Xanthomonas, Pseudomonas acidovorans, Thiobacillus thioparvum, Thiobacillus thiooxidans, Bacillus cereus, Aerobacter aerogenes, Nitrobacter and denitrifying bacilli.
CN201611191042.3A 2016-12-21 2016-12-21 Processing system of spray drying tower tail gas Active CN108211611B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201611191042.3A CN108211611B (en) 2016-12-21 2016-12-21 Processing system of spray drying tower tail gas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201611191042.3A CN108211611B (en) 2016-12-21 2016-12-21 Processing system of spray drying tower tail gas

Publications (2)

Publication Number Publication Date
CN108211611A CN108211611A (en) 2018-06-29
CN108211611B true CN108211611B (en) 2020-03-31

Family

ID=62650788

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201611191042.3A Active CN108211611B (en) 2016-12-21 2016-12-21 Processing system of spray drying tower tail gas

Country Status (1)

Country Link
CN (1) CN108211611B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109126495B (en) * 2018-07-09 2021-06-01 山东微研生物科技有限公司 Energy-concerving and environment-protective type vitamin B2 drying device
CN109308102B (en) * 2018-09-11 2020-01-21 郑州航空工业管理学院 Embedded network intelligent information processing server
CN109331597A (en) * 2018-11-26 2019-02-15 汕头市联和环保科技有限公司 Spray tower waste gas purification recovery device
CN109621685A (en) * 2019-01-31 2019-04-16 滨化集团股份有限公司 A kind of technique that deep cooling adds carbon fiber adsorption and catalytic combustion processing chlorohydrination tail gas
CN111389161A (en) * 2020-04-20 2020-07-10 上海红重机械装备有限公司 Steel structure coating waste gas treatment process

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102500116B (en) * 2011-09-29 2013-09-04 无锡市群征干燥设备有限公司 High-efficiency energy-saving closed circulatory spray drying method and drying system

Also Published As

Publication number Publication date
CN108211611A (en) 2018-06-29

Similar Documents

Publication Publication Date Title
CN108211611B (en) Processing system of spray drying tower tail gas
CN206778161U (en) A kind of fitting space air purifying device of automatic control transfusion
CN107029527A (en) A kind of fitting space peculiar smell purification method and device
CN101104133A (en) Air purifying method and device thereof
CN206560793U (en) A kind of low-temperature plasma UV photodissociation integration apparatus
CN105771574A (en) Process for purifying nitrogen-containing organic waste gas by adopting photon-generated ozone catalytic oxidation coupled biological method
CN102068890A (en) Method and device for treating complex industrial organic waste gas
CN205965460U (en) Dyestuff exhaust gas purification device
CN102580452A (en) Indoor polluted air treatment instrument
CN101185820A (en) Method and device for fathering fish powder waste gases
CN104998511A (en) Tail gas purification and environmental protection treatment system of cremator
CN202460468U (en) Photocatalytic organic waste gas purifier
CN202113707U (en) Air purifier
CN113198301B (en) Deep purification method for VOCs and particulate matters in dry tail gas of artificial board industry
CN205164386U (en) Cremator tail -gas clean -up environmental protection processing system
CN1266988C (en) Industrial apparatus for plasma capable of generating random streamer discharge and application thereof
CN111023713A (en) Solid drying method and system
CN112933837A (en) Paint spray booth waste gas treatment method
CN112755775A (en) Efficient deodorization flue gas treatment process
CN209451632U (en) A kind of pig house environmental protection grade deodorizing process system
CN108211612A (en) A kind of dyestuff spray drying tower waste gas processing method
CN213824189U (en) Zero-emission treatment and circulation system for production waste gas
CN202446965U (en) Indoor polluted air treatment device
CN113082969B (en) Exhaust gas treatment system
CN209968120U (en) Plastics oil smoke VOC waste gas treatment device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant