CN116854319B - Sludge treatment method and treatment device thereof - Google Patents
Sludge treatment method and treatment device thereof Download PDFInfo
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- CN116854319B CN116854319B CN202310609991.2A CN202310609991A CN116854319B CN 116854319 B CN116854319 B CN 116854319B CN 202310609991 A CN202310609991 A CN 202310609991A CN 116854319 B CN116854319 B CN 116854319B
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- 239000010802 sludge Substances 0.000 title claims abstract description 186
- 238000000034 method Methods 0.000 title claims abstract description 26
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 78
- 230000001502 supplementing effect Effects 0.000 claims abstract description 68
- 239000000446 fuel Substances 0.000 claims abstract description 40
- 238000005086 pumping Methods 0.000 claims abstract description 27
- 238000001035 drying Methods 0.000 claims abstract description 18
- 238000000197 pyrolysis Methods 0.000 claims abstract description 18
- 238000003756 stirring Methods 0.000 claims abstract description 18
- 239000002245 particle Substances 0.000 claims abstract description 17
- 238000002309 gasification Methods 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 13
- 230000001954 sterilising effect Effects 0.000 claims abstract description 12
- 230000000694 effects Effects 0.000 claims abstract description 5
- 238000001784 detoxification Methods 0.000 claims abstract description 4
- 238000005507 spraying Methods 0.000 claims description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 15
- 238000005096 rolling process Methods 0.000 claims description 13
- 238000011084 recovery Methods 0.000 claims description 11
- 238000004064 recycling Methods 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 230000002745 absorbent Effects 0.000 claims description 8
- 239000002250 absorbent Substances 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 8
- 230000001877 deodorizing effect Effects 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 6
- 231100000331 toxic Toxicity 0.000 claims description 6
- 230000002588 toxic effect Effects 0.000 claims description 6
- 239000008394 flocculating agent Substances 0.000 claims description 5
- 239000010865 sewage Substances 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 4
- 239000002893 slag Substances 0.000 claims description 4
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- 238000007667 floating Methods 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 claims description 2
- 230000008602 contraction Effects 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract description 7
- 239000002781 deodorant agent Substances 0.000 abstract description 5
- 239000003063 flame retardant Substances 0.000 abstract description 5
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 abstract description 4
- 238000000926 separation method Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 26
- 239000011499 joint compound Substances 0.000 description 22
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 21
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 8
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 6
- 239000008187 granular material Substances 0.000 description 5
- 238000004321 preservation Methods 0.000 description 5
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 4
- 239000000292 calcium oxide Substances 0.000 description 4
- 235000012255 calcium oxide Nutrition 0.000 description 4
- 239000004579 marble Substances 0.000 description 4
- 239000005997 Calcium carbide Substances 0.000 description 3
- 241000700605 Viruses Species 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 3
- 239000000920 calcium hydroxide Substances 0.000 description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000010981 drying operation Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229920000915 polyvinyl chloride Polymers 0.000 description 3
- 239000004800 polyvinyl chloride Substances 0.000 description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 description 3
- 238000004659 sterilization and disinfection Methods 0.000 description 3
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 3
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 229940037003 alum Drugs 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 2
- 235000017557 sodium bicarbonate Nutrition 0.000 description 2
- 206010024796 Logorrhoea Diseases 0.000 description 1
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/10—Treatment of sludge; Devices therefor by pyrolysis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/001—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for sludges or waste products from water treatment installations
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
- C10J2300/0916—Biomass
- C10J2300/0923—Sludge, e.g. from water treatment plant
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/40—Valorisation of by-products of wastewater, sewage or sludge processing
Abstract
The application discloses a sludge treatment method and a treatment device thereof, which belong to the field of sludge treatment and comprise treatment steps of stirring and curing, vibration drying, mixing and separation, pyrolysis and gasification and detoxification circulation and heat value fuel supplementing equipment, wherein the heat value fuel supplementing equipment is arranged in a feeding area of a vibration fluidized bed, and a convection hot air pipe is arranged in the vibration fluidized bed. According to the application, the sludge mixed with the flocculant and the sterilizing deodorant is pumped into the heat value fuel supplementing equipment through the premixed sludge pumping pipe in the vibrating fluidized bed, and then the premixed sludge intermittently flowing out is quickly dried through the carbon powder supplementing sleeve, so that the premixed sludge can form particles, and rolls down along with the vibration of the vibrating convection plate to form carbon powder sludge particles, so that the carbon powder sludge particles are collected at the collecting end of the vibrating fluidized bed, and are conveniently and fully contacted with flame-retardant gas in the incinerator, harmful substances in the sludge are fully incinerated, and the effect of improving the sludge incineration pyrolysis gasification efficiency is achieved.
Description
Technical Field
The application relates to the technical field of sludge treatment, in particular to a sludge treatment method and a sludge treatment device.
Background
The sludge is a bottom sediment generated in the wastewater treatment process, has a generally complex composition, contains various pathogenic bacteria, various viruses, various inorganic matters and a large amount of organic matters, and needs to be treated so as to avoid pollution to the environment caused by direct discharge.
At present, the sludge is generally treated by dehydration, drying, recycling, isolated landfill and harmless incineration. The conventional sludge incineration on-site treatment process is easy to occur: the odor of the operation site is large, the operating personnel are infected by virus and germ, the occupied area is large, sulfur dioxide, oxynitride and dioxin substances are easy to generate in the incineration process, meanwhile, the dried sludge is directly put into the incinerator for pyrolysis and gasification in the traditional sludge incineration process, and the flame retardant material added later can only contact with the surface of the sludge, so that the inside of the sludge cannot be burnt, and harmful substances in the sludge cannot be completely incinerated.
Therefore, we propose a sludge treatment method and a treatment device thereof.
Disclosure of Invention
The application aims to solve the problem that harmful substances in sludge cannot be completely burnt completely in the prior art by directly throwing dried sludge into an incinerator for pyrolysis and gasification, and provides a sludge treatment method and a sludge treatment device.
In order to achieve the above purpose, the present application adopts the following technical scheme:
step S1: stirring and curing, namely adding a flocculating agent and a sterilizing and deodorizing agent into the sewage treatment precipitated sludge, and then stirring and curing to obtain pretreated sludge;
step S2: vibration drying, namely pumping the pretreated sludge in the step S1 into a vibration fluidized bed, supplementing heat value fuel, and drying wet sludge through heat convection air to obtain a dry sludge mixed material;
step S3: separating the mixed material, floating water vapor contained in wet sludge in the step S2 upwards in a channel through which hot air flows upwards, and sliding down the dry sludge mixed material, wherein the water vapor is condensed into reuse water, the reuse water enters a heating pipeline system, hot air and combustible gas in the dry sludge are mixed to obtain combustible mixed gas, the combustible mixed gas enters an incinerator, and the dry sludge after secondary drying is conveyed into a sludge storage tank through a conveying device to be treated;
step S4: the dry sludge in the sludge storage tank in the step S3 is sent into a pyrolysis gasification furnace for heating and pressurizing, heat and pressure are preserved again, combustible components in the dry sludge are gasified into combustible mixed gas, and residual sludge slag is arranged at the bottom of the furnace;
step S5: and (3) detoxification circulation, namely spraying and absorbing the combustible mixed gas in the step (S4) through an absorbent through a spray tower to remove toxic and harmful components, putting the rest combustible mixed gas into an incinerator for incineration, and enabling hot water vapor to enter a heating pipeline system for recycling.
Preferably, in step S1, the dry weight ratio of sludge, flocculant and sterilizing and deodorizing agent is 60:3:2; the flocculant is one or two of papermaking white mud or alum and saw mud of marble manufacturers; the sterilizing and deodorizing agent is one or more of calcium carbide mud, quicklime and sodium hydroxide of polyvinyl chloride production enterprises; the time taken for stirring and curing was 24 hours.
Preferably, in step S2, heat conduction oil or steam is used for heating and preheating before heat convection; the temperature of the hot air is 90 ℃; the speed of the hot air was 4m/s.
Preferably, in the step S3, the wind speed of hot air is 28-54 m/S; in step S5, the absorbent is a solution formed by one or more of sodium hydroxide, calcium hydroxide, sodium carbonate and sodium bicarbonate; the concentration of the absorbent is 2%; the volume mixing ratio of the combustible gas and the hot air in step S3 is 1:3.
preferably, the temperature is raised to 620 ℃; the pressurizing pressure is 1.2MPa; the time of heat preservation and pressure maintaining is 3 hours; cooling to 300 ℃; the time of heat preservation and pressure maintaining is 1.7 hours.
The treatment device comprises stirring mixing equipment, a vibrating fluidized bed, a pyrolysis gasifier, an incinerator, a spray tower and heat value fuel supplementing equipment in the treatment step of the sludge treatment method, wherein the stirring mixing equipment is a feeding device and is sequentially communicated with the vibrating fluidized bed, the incinerator, the pyrolysis gasifier and the incinerator, the heat value fuel supplementing equipment is arranged in a feeding area of the vibrating fluidized bed, a convection hot air pipe is arranged in the vibrating fluidized bed, a premixed sludge pumping pipe is arranged at the top of the heat value fuel supplementing equipment, a stable support is arranged at the outer side of the heat value fuel supplementing equipment, a carbon powder supplementing mechanism is arranged in the heat value fuel supplementing equipment, and a preheating rolling mechanism is arranged at the bottom of the heat value fuel supplementing equipment;
the carbon powder supplementing mechanism comprises a carbon powder supplementing sleeve arranged at the bottom of a premixed sludge pumping pipe, a carbon powder spraying pipe is arranged in the carbon powder supplementing sleeve, the carbon powder spraying pipe is communicated with a convection hot air pipe, the inner wall of the carbon powder spraying pipe is communicated with a carbon powder supplementing tank, a spraying port is formed in the bottom of the carbon powder supplementing sleeve, and a powder spraying port is formed in the bottom of the carbon powder spraying pipe;
the preheating roll-off mechanism comprises a vibration convection plate arranged at the bottom of a pre-mixed sludge pumping pipe, a roll-off stripe groove is formed in the top of the vibration convection plate, a convection hole is formed in the inner wall of the vibration convection plate, a recovery inclined plate sleeved with the outer surface of a convection hot air pipe is arranged at the bottom of the vibration convection plate, a circulating air pipe is arranged at the left side of the recovery inclined plate, a dry sludge circulating bracket is arranged at the left side of the circulating air pipe, and circulating blades are arranged on the outer surface of the dry sludge circulating bracket.
Preferably, the inner wall of the carbon powder spraying pipe is provided with a spraying sleeve, the top of the spraying sleeve is provided with a reset spring, the spraying sleeve is distributed in a rotationally symmetrical mode, and a carbon powder wrapping opening is formed in the inner side of the spraying sleeve.
Preferably, the top of stable support is provided with shutoff drainage post, the bottom of vibration fluidized bed is provided with vibrating element, vibrating element provides vibration driving force by eccentric motor, the outside of premixing sludge pump pipe is fixed with the vibration fluidized bed is inboard, just the outside of premixing sludge pump pipe is provided with the buffering seal tube, the lift expansion space when providing vibration fluidized bed vibration.
Preferably, the vibration convection plate and the recycling sloping plate are obliquely arranged, the oblique directions are opposite, and the bottom of the rolling stripe groove is provided with a carbon powder supplementing cylinder.
Preferably, the circulating air pipe is communicated with the convection hot air pipe, the circulating air pipe is obliquely arranged, the circulating blades are arc-shaped, and the material rolling-off paths of the recycling inclined plate and the vibration convection plate are connected.
Compared with the prior art, the application has the beneficial effects that:
1. the device such as through setting up calorific value fuel supplementing device, convection hot air pipe and premixed sludge pump pipe mutually support, inside the vibration fluidized bed, pump the sludge pump after mixing flocculating agent and the deodorant that disinfects into calorific value fuel supplementing device through premixed sludge pump pipe, then carry out rapid drying through the premixed mud that the carbon powder supplementing sleeve was interrupted to flow out, make premixed mud can form the granule, along with the vibration of vibration convection current board, roll down and form carbon powder mud granule, thereby collect carbon powder mud granule at vibration fluidized bed collecting end, be convenient for in the incinerator, fully contact with fire-retardant gas, fully burn harmful substance in the mud, reach the effect that improves mud burning pyrolysis gasification efficiency, directly put into the incinerator with the mud after drying in the above-mentioned background art and pyrolysis gasification, be difficult to complete the problem of burning.
2. By adding the sterilizing deodorant into the sludge, virus and germ are killed, and meanwhile, substances generating odor gas are decomposed, so that the volatilization of the odor gas is reduced; solidifying the generated poisonous and harmful gas by adding a flocculating agent; in the thermal decomposition process, the generated dioxin substances are decomposed through secondary heat preservation and pressure maintaining, and toxic and harmful gases are solidified; a small amount of non-solidified toxic and harmful gas can be sprayed and absorbed, so that the toxic and harmful gas is prevented from entering the environment and polluting the atmosphere; finally, the sludge slag with high weight reduction ratio is obtained at the bottom of the pyrolysis gasification furnace, thereby achieving the effects of reducing cost, simplifying the process and improving the efficiency.
Drawings
FIG. 1 is a schematic view of a material flow path of a sludge treatment method and a treatment device thereof according to the present application;
FIG. 2 is a flow chart showing steps of a sludge treatment method and a sludge treatment device thereof according to the present application;
FIG. 3 is a schematic diagram showing the overall structure of a heating value fuel supplementing device and a vibrating fluidized bed of a sludge treatment method and a treatment device thereof;
FIG. 4 is a schematic diagram of the internal structure of a heating value fuel supplementing device and a vibrating fluidized bed of a sludge treatment method and a treatment device thereof;
FIG. 5 is an enlarged view of the structure of FIG. 4A in accordance with the present application;
FIG. 6 is an exploded view of a carbon powder spraying tube structure of a sludge treatment method and a treatment device thereof according to the present application;
FIG. 7 is a bottom view of the structure of the ejection sleeve and the carbon powder supplementing sleeve of the sludge treatment method and the treatment device thereof;
fig. 8 is a schematic diagram of a vibrating convection plate structure of a sludge treatment method and a sludge treatment device according to the present application.
In the figure: 1. a heating value fuel replenishing device; 2. convection hot air duct; 3. a premixed sludge pumping pipe; 31. buffering the sealing tube; 4. a stabilizing support; 5. a carbon powder supplementing mechanism; 51. a carbon powder supplementing sleeve; 52. a carbon powder spraying pipe; 521. ejecting a sleeve; 522. a return spring; 53. a carbon powder supplementing tank; 54. plugging a drainage column; 6. preheating a rolling mechanism; 61. vibrating the convection plate; 611. a carbon powder supplementing cylinder; 62. recovering the sloping plate; 63. a circulating air pipe; 64. a dry sludge circulation bracket; 65. and (3) circulating blades.
Detailed Description
The technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present application are included in the protection scope of the present application.
An embodiment one, this embodiment is a treatment step of a sludge treatment method;
referring to fig. 1 and 2, a sludge treatment method includes the following treatment steps:
step S1: stirring and curing, namely adding a flocculating agent and a sterilizing and deodorizing agent into the sewage treatment precipitated sludge, and then stirring and curing to obtain pretreated sludge;
step S2: vibration drying, namely pumping the pretreated sludge in the step S1 into a vibration fluidized bed, supplementing heat value fuel, and drying wet sludge through heat convection air to obtain a dry sludge mixed material;
step S3: separating the mixed material, floating water vapor contained in wet sludge in the step S2 upwards in a channel through which hot air flows upwards, and sliding down the dry sludge mixed material, wherein the water vapor is condensed into reuse water, the reuse water enters a heating pipeline system, hot air and combustible gas in the dry sludge are mixed to obtain combustible mixed gas, the combustible mixed gas enters an incinerator, and the dry sludge after secondary drying is conveyed into a sludge storage tank through a conveying device to be treated;
step S4: the dry sludge in the sludge storage tank in the step S3 is sent into a pyrolysis gasification furnace for heating and pressurizing, heat and pressure are preserved again, combustible components in the dry sludge are gasified into combustible mixed gas, and residual sludge slag is arranged at the bottom of the furnace;
step S5: and (3) detoxification circulation, namely spraying and absorbing the combustible mixed gas in the step (S4) through an absorbent through a spray tower to remove toxic and harmful components, putting the rest combustible mixed gas into an incinerator for incineration, and enabling hot water vapor to enter a heating pipeline system for recycling.
Specifically, in step S1, the dry weight ratio of sludge, flocculant and sterilization and deodorization agent is 60:3:2; the flocculant is one or two of papermaking white mud or alum and saw mud of marble manufacturers; the sterilizing and deodorizing agent is one or more of calcium carbide mud, quicklime and sodium hydroxide of polyvinyl chloride production enterprises; the time taken for stirring and curing was 24 hours.
Through the technical scheme, the flocculant or the curing agent refers to one or two of papermaking white mud and saw mud of marble manufacturers, and the weight ratio of the papermaking white mud to the saw mud of the marble manufacturers is 1:1, a mixture of two or more of the above-mentioned materials; the sterilizing and deodorizing agent is one or more of calcium carbide mud, quicklime and sodium hydroxide of polyvinyl chloride production enterprises, preferably quicklime.
Specifically, in step S2, heat conduction oil or steam is used for heating and preheating before heat convection; the temperature of the hot air is 90 ℃; the speed of the hot air was 4m/s.
Specifically, the wind speed of hot air is 28-54 m/s; in step S5, the absorbent is a solution formed by one or more of sodium hydroxide, calcium hydroxide, sodium carbonate and sodium bicarbonate; the concentration of the absorbent is 2%; the volume mixing ratio of the combustible gas and the hot air in step S3 is 1:3.
specifically, in step S4, the temperature is raised to 620 ℃; the pressurizing pressure is 1.2MPa; the time of heat preservation and pressure maintaining is 3 hours; cooling to 300 ℃; the time of heat preservation and pressure maintaining is 1.7 hours.
By the technical scheme, the absorbent is a solution formed by one or more of sodium hydroxide, calcium hydroxide, sodium carbonate and sodium bicarbonate, and preferably sodium hydroxide.
In a second embodiment, the present embodiment is a treatment apparatus for a sludge treatment method;
as shown in fig. 3 to 8, a treatment device of a sludge treatment method comprises a stirring and mixing device, a vibrating fluidized bed, a pyrolysis gasifier, an incinerator, a spray tower and a heat value fuel supplementing device 1 which are treated in the sludge treatment method, wherein the stirring and mixing device is a feeding device and is sequentially communicated with the vibrating fluidized bed, the incinerator, the pyrolysis gasifier and the incinerator, the heat value fuel supplementing device 1 is arranged in a feeding area of the vibrating fluidized bed, a convection hot air pipe 2 is arranged in the vibrating fluidized bed, a premixed sludge pumping pipe 3 is arranged at the top of the heat value fuel supplementing device 1, a stabilizing bracket 4 is arranged at the outer side of the heat value fuel supplementing device 1, a carbon powder supplementing mechanism 5 is arranged in the heat value fuel supplementing device 1, and a preheating rolling mechanism 6 is arranged at the bottom of the heat value fuel supplementing device 1;
according to the technical scheme, the sludge after sewage treatment is mixed with the flocculant and the sterilization deodorant through the stirring and mixing equipment, then the premixed sludge is pumped into the heat value fuel supplementing equipment 1 through the conveying pump, water is absorbed for the premixed sludge with larger water content through the carbon powder supplementing mechanism 5, flame-retardant fuel is provided for subsequent pyrolysis and gasification, then the premixed sludge doped with carbon powder in the particle shape is preheated through the convection hot air pipe 2 in the vibrating fluidized bed, the convection drying is carried out, meanwhile, the preheated and dried premixed sludge is driven to move to a collecting port of the vibrating fluidized bed while vibrating, and the dried gas is conveyed to the air purifying equipment from the top of the vibrating fluidized bed, so that the water and the hot air in the premixed sludge are separated into liquid and gas, and the heat value fuel supplementing and the vibration drying operation of the premixed sludge are completed;
based on the above, the heating value fuel added in the present application may be replaced with the rest of the fixed fuel powder having strong water absorbing ability.
An embodiment III is a carbon powder supplementing mechanism of a sludge treatment device;
as shown in fig. 3-7, the carbon powder supplementing mechanism 5 comprises a carbon powder supplementing sleeve 51 arranged at the bottom of the premixed sludge pumping pipe 3, a carbon powder spraying pipe 52 is arranged in the carbon powder supplementing sleeve 51, the carbon powder spraying pipe 52 is communicated with the convection hot air pipe 2, the inner wall of the carbon powder spraying pipe 52 is communicated with a carbon powder supplementing tank 53, a spraying hole is formed in the bottom of the carbon powder supplementing sleeve 51, and a powder spraying hole is formed in the bottom of the carbon powder spraying pipe 52;
according to the technical scheme, when the premixed sludge is pumped into the vibrating fluidized bed by the premixed sludge pumping pipe 3, the dried carbon powder is supplemented to the surface of the sludge through the carbon powder supplementing sleeve 51, moisture is absorbed, the shaping of the sludge is assisted, and the moisture contained in the sludge is dried through the convection hot air pipe 2, so that the vibration drying operation of the premixed sludge is completed;
based on the above, during the non-working period of the vibrating fluidized bed, the premixed sludge pumping pipe 3 cannot drop the sludge, when the vibrating fluidized bed works, the bottom of the premixed sludge pumping pipe 3 is conducted, so that the bottom of the premixed sludge pumping pipe 3 can follow the vibration of the vibrating fluidized bed to drop the sludge intermittently, and meanwhile, when the vibrating fluidized bed does not work, the hot air pipe 2 is not conducted, the carbon powder spraying pipe 52 is in a closed state, carbon powder is not directly sprayed into the vibrating fluidized bed, and the heat value fuel is only supplemented to the sludge when the sludge drops.
Specifically, the inner wall of the carbon powder discharge tube 52 is provided with a discharge sleeve 521, the top of the discharge sleeve 521 is provided with a return spring 522, the discharge sleeve 521 is rotationally symmetrically distributed, and the inner side of the discharge sleeve 521 is provided with a carbon powder wrapping opening.
Through the above technical scheme, when the convection hot air pipe 2 is not conducted, the reset spring 522 drives the ejection sleeve 521 to move towards the inside of the carbon powder supplementing sleeve 51 at this time, so that the ejection sleeve 521 is positioned inside the carbon powder supplementing sleeve 51, and the carbon powder does not directly flow into the heat value fuel supplementing device 1 in the carbon powder wrapping opening.
Specifically, the top of steady rest 4 is provided with shutoff drainage post 54, and vibrating fluid bed's bottom is provided with vibrating element, and vibrating element provides vibration driving force by eccentric motor, and the outside of premixing sludge pump pipe 3 is fixed with vibrating fluid bed inboard, and the outside of premixing sludge pump pipe 3 is provided with buffering sealed tube 31, the flexible space of lift when providing vibrating fluid bed vibration.
According to the technical scheme, when the vibrating fluidized bed does not work, the bottom of the vibrating fluidized bed is lifted by manual or mechanical lifting equipment, so that the bottom of the premixed sludge pumping pipe 3 is blocked by the blocking drainage column 54, the premixed sludge pumping pipe 3 is sealed, and when the vibrating fluidized bed works, the premixed sludge pumping pipe 3 is driven to move by the vibrating component, so that the premixed sludge pumping pipe 3 is intermittently blocked by the blocking drainage column 54, and the effect of intermittently dripping sludge is achieved;
based on the above, when the intermittent dropping sludge, the carbon powder spraying pipe 52 sprays the surface of the dropping sludge, and absorbs the moisture in the sludge rapidly, so that the moisture can not be directly accumulated on the surface of the vibration convection plate 61 when falling into the feeding area of the vibration fluidized bed, the sludge can not be rolled down along with the vibration of the vibration convection plate 61, the sludge can be dried into powder for a long time and can be rolled down to the collecting port of the vibration fluidized bed, the powdery sludge is collected in the gas collecting pipe at the top of the vibration fluidized bed, the powdery sludge is required to be reprocessed, the vibration drying efficiency is also reduced, the treatment time of the sludge is prolonged, and the energy consumption is increased.
Fourth, the present embodiment is a preheating roll-off mechanism of a sludge treatment apparatus;
as shown in fig. 4 and 8, the preheating and rolling mechanism 6 comprises a vibration convection plate 61 arranged at the bottom of the premixed sludge pumping pipe 3, rolling strip grooves are formed in the top of the vibration convection plate 61, convection holes are formed in the inner wall of the vibration convection plate 61, a recovery inclined plate 62 sleeved with the outer surface of the convection hot air pipe 2 is arranged at the bottom of the vibration convection plate 61, a circulating air pipe 63 is arranged at the left side of the recovery inclined plate 62, a dry sludge circulating bracket 64 is arranged at the left side of the circulating air pipe 63, and circulating blades 65 are arranged on the outer surface of the dry sludge circulating bracket 64.
According to the technical scheme, the carbon powder doped sludge is further dried by convection hot air pipe 2, and rolls on the top of vibration convection plate 61 along with the vibration of the vibration fluidized bed, so that the granular carbon powder sludge is collected at the collection port of the vibration fluidized bed, and the operation of drying and rolling the carbon powder sludge into granules is completed;
based on the above, during the vibration of the vibration convection plate 61, part of the sludge particles and carbon powder particles fall to the top of the recovery inclined plate 62, roll to the dry sludge circulation bracket 64 by vibration, roll to the left side of the vibration convection plate 61 again by the circulation vane 65, wait to roll to the collection port of the vibration fluidized bed again;
based on the above, be provided with umbrella shape and seal at the convection hot air pipe 2 top of vertical setting, avoid some dry state mud garrulous granule and carbon dust to directly fall into convection hot air pipe 2 inside, cause the jam.
Specifically, the vibration convection plate 61 and the recovery inclined plate 62 are arranged obliquely, the oblique directions are opposite, and the bottom of the roll-off stripe groove is provided with a toner replenishing cylinder 611.
Through above-mentioned technical scheme, vibration convection plate 61 sets up to be left side high and right low, and recovery swash plate 62 sets up to be left side low and right high to can drive mud and roll when vibrating the fluidized bed vibration, make mud tend to the graininess, be convenient for follow-up collect and put into the incinerator to mud, fully burn.
Specifically, the circulation air pipe 63 is communicated with the convection hot air pipe 2, and the circulation air pipe 63 is obliquely arranged, the circulation blades 65 are arc-shaped, and the material rolling paths of the recovery inclined plate 62 and the vibration convection plate 61 are linked.
Through the above technical scheme, when the convection hot air pipe 2 blows the circulation air pipe 63, the circulation blades 65 are driven to rotate anticlockwise, and the dry sludge crushed particles and carbon powder particles which roll to the left side of the recovery inclined plate 62 are conveyed to the left side of the vibration convection plate 61 again, so that the dry sludge crushed particles and carbon powder particles can roll to the collection port of the vibration fluidized bed along with the dropped sludge again.
According to the application, the sludge after sewage treatment is mixed with the flocculant and the sterilization deodorant through the stirring and mixing equipment, then the premixed sludge is pumped into the heat value fuel supplementing equipment 1 through the conveying pump, the premixed sludge with larger water content is absorbed by the carbon powder supplementing mechanism 5, meanwhile, flame-retardant fuel is provided for subsequent pyrolysis and gasification, then the premixed sludge doped with carbon powder in the form of particles is preheated through the convection hot air pipe 2 in the vibrating fluidized bed, the premixed sludge is subjected to convection drying, meanwhile, the preheated and dried premixed sludge is driven to move towards a collecting port of the vibrating fluidized bed while vibrating, and the dried gas is conveyed to the air purifying equipment from the top of the vibrating fluidized bed, so that the moisture and hot air in the premixed sludge are subjected to liquid-gas separation, and the heat value fuel supplementing and the vibration drying operation of the premixed sludge are completed.
The foregoing is only a preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art, who is within the scope of the present application, should make equivalent substitutions or modifications according to the technical scheme of the present application and the inventive concept thereof, and should be covered by the scope of the present application.
Claims (2)
1. The sludge treatment device is characterized by comprising stirring mixing equipment, a vibrating fluidized bed, a pyrolysis gasification furnace, an incinerator, a spray tower and heat value fuel supplementing equipment (1), wherein the stirring mixing equipment is a feeding device and is sequentially communicated with the vibrating fluidized bed, the incinerator, the pyrolysis gasification furnace and the incinerator, the heat value fuel supplementing equipment (1) is arranged in a feeding area of the vibrating fluidized bed, a convection hot air pipe (2) is arranged in the vibrating fluidized bed, a premixed sludge pumping pipe (3) is arranged at the top of the heat value fuel supplementing equipment (1), a stabilizing support (4) is arranged at the outer side of the heat value fuel supplementing equipment (1), a carbon powder supplementing mechanism (5) is arranged in the heat value fuel supplementing equipment (1), and a preheating rolling mechanism (6) is arranged at the bottom of the heat value fuel supplementing equipment (1);
the carbon powder supplementing mechanism (5) comprises a carbon powder supplementing sleeve (51) arranged at the bottom of a premixed sludge pumping pipe (3), a carbon powder spraying pipe (52) is arranged in the carbon powder supplementing sleeve (51), the carbon powder spraying pipe (52) is communicated with a convection hot air pipe (2), the inner wall of the carbon powder spraying pipe (52) is communicated with a carbon powder supplementing tank (53), a spraying hole is formed in the bottom of the carbon powder supplementing sleeve (51), a powder spraying hole is formed in the bottom of the carbon powder spraying pipe (52), a spraying sleeve (521) is arranged on the inner wall of the carbon powder spraying pipe (52), a reset spring (522) is arranged at the top of the spraying sleeve (521), the spraying sleeve (521) is distributed in a rotationally symmetrical mode, a wrapping hole is formed in the inner side of the spraying sleeve (521), a drainage column (54) is arranged at the top of a stabilizing support (4), a vibrating part is arranged at the bottom of the vibrating fluidized bed, a vibrating driving force is provided by a motor, a vibrating expansion and contraction space is provided between the inner side of the premixed sludge pumping pipe (3) and the fluidized bed, and the vibrating fluidized bed is fixed, and when the vibrating and the vibrating fluidized bed is in a vibrating and the vibrating and expanding in the space is provided;
the preheating rolling mechanism (6) comprises a vibrating convection plate (61) arranged at the bottom of a premixed sludge pumping pipe (3), a rolling strip groove is formed in the top of the vibrating convection plate (61), a convection hole is formed in the inner wall of the vibrating convection plate (61), a recycling inclined plate (62) sleeved on the outer surface of a convection hot air pipe (2) is arranged at the bottom of the vibrating convection plate (61), a circulating air pipe (63) is arranged at the left side of the recycling inclined plate (62), a dry sludge circulating bracket (64) is arranged at the left side of the circulating air pipe (63), circulating blades (65) are arranged on the outer surface of the dry sludge circulating bracket (64), the circulating air pipe (63) is communicated with the convection hot air pipe (2), the circulating air pipe (63) is obliquely arranged, the circulating blades (65) are arc-shaped, and a material rolling path of the recycling inclined plate (62) and the vibrating convection plate (61) is connected;
when the convection hot air pipe (2) is not conducted, the reset spring (522) drives the ejection sleeve (521) to move towards the inside of the carbon powder supplementing sleeve (51), so that the ejection sleeve (521) is positioned in the carbon powder supplementing sleeve (51), carbon powder is not directly flowed into the heat value fuel supplementing equipment (1) in a carbon powder wrapping opening, when the vibrating fluidized bed does not work, the bottom of the vibrating fluidized bed is lifted by artificial or mechanical lifting equipment, the bottom of the premixed sludge pumping pipe (3) is blocked by the blocking drainage column (54), the bottom of the premixed sludge pumping pipe (3) is sealed, and when the vibrating fluidized bed works, the premixed sludge pumping pipe (3) is driven by the vibrating component to move up and down, so that the blocking drainage column (54) is discontinuously blocked by the premixed sludge pumping pipe (3), and the effect of intermittently dripping sludge is achieved;
when the sludge is intermittently dropped, the carbon powder spraying pipe (52) sprays the surface of the dropped sludge, and the water in the sludge is quickly absorbed, so that the sludge can not be directly accumulated on the surface of the vibrating convection plate (61) when the sludge falls into a feeding area of the vibrating fluidized bed, cannot fall along with the vibration of the vibrating convection plate (61), is required to be dried into powder for a long time and then falls into a collecting port of the vibrating fluidized bed, the powdery sludge is collected in a gas collecting pipe at the top of the vibrating fluidized bed, and is required to be reprocessed, and the vibration drying efficiency is also reduced, the treatment time of the sludge is increased, and the energy consumption is increased;
the vibrating convection plate (61) is arranged to be high on the left and low on the right, and the recycling inclined plate (62) is arranged to be low on the left and high on the right, so that when the vibrating fluidized bed vibrates, the sludge is driven to roll, so that the sludge tends to be granular, and is convenient to collect and put into the incinerator subsequently and is fully incinerated;
in the vibration process of the vibration convection plate (61), part of sludge particles and carbon powder particles fall to the top of the recovery inclined plate (62), roll the sludge particles and the carbon powder particles to the dry sludge circulation support (64) through vibration, and drive the circulation blades (65) to rotate anticlockwise when the circulation air pipe (63) is blown by the convection hot air pipe (2), and convey the dry sludge particles and the carbon powder particles which roll to the left side of the recovery inclined plate (62) to the left side of the vibration convection plate (61) again to wait for rolling to a collection port of the vibration fluidized bed again.
2. A sludge treatment plant according to claim 1, characterized by comprising the following sludge treatment steps:
step S1: stirring and curing, namely adding a flocculating agent and a sterilizing and deodorizing agent into the sewage treatment precipitated sludge, and then stirring and curing by stirring and mixing equipment to obtain pretreated sludge;
step S2: vibration drying, namely pumping the pretreated sludge in the step S1 into a vibration fluidized bed, supplementing heat value fuel, and drying wet sludge through heat convection air to obtain a dry sludge mixed material;
step S3: separating the mixed material, floating water vapor contained in wet sludge in the step S2 upwards in a channel through which hot air flows upwards, and sliding down the dry sludge mixed material, wherein the water vapor is condensed into reuse water, the reuse water enters a heating pipeline system, hot air and combustible gas in the dry sludge are mixed to obtain combustible mixed gas, the combustible mixed gas enters an incinerator, and the dry sludge after secondary drying is conveyed into a sludge storage tank through a conveying device to be treated;
step S4: the dry sludge in the sludge storage tank in the step S3 is sent into a pyrolysis gasification furnace for heating and pressurizing, heat and pressure are preserved again, combustible components in the dry sludge are gasified into combustible mixed gas, and residual sludge slag is arranged at the bottom of the furnace;
step S5: and (3) detoxification circulation, namely spraying and absorbing the combustible mixed gas in the step (S4) through an absorbent through a spray tower to remove toxic and harmful components, putting the rest combustible mixed gas into an incinerator for incineration, and enabling hot water vapor to enter a heating pipeline system for recycling.
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