CN107445424B - Device for realizing high-efficiency reduction and recycling of organic waste through thermocatalysis - Google Patents
Device for realizing high-efficiency reduction and recycling of organic waste through thermocatalysis Download PDFInfo
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- CN107445424B CN107445424B CN201710666497.4A CN201710666497A CN107445424B CN 107445424 B CN107445424 B CN 107445424B CN 201710666497 A CN201710666497 A CN 201710666497A CN 107445424 B CN107445424 B CN 107445424B
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- 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
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- 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
- B01D53/02—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 adsorption, e.g. preparative gas chromatography
- B01D53/04—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 adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/0407—Constructional details of adsorbing systems
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- 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
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- 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
- B01D53/8678—Removing components of undefined structure
- B01D53/8687—Organic components
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
Abstract
The invention provides a device for realizing high-efficiency reduction and recycling of organic waste through thermal catalysis, wherein an organic waste feeding system is connected with a material inlet of a batching kettle, a material outlet of the batching kettle is connected with a pre-reaction kettle and a material inlet of a main reaction kettle, a material outlet of the pre-reaction kettle is connected with a material inlet of the main reaction kettle, a material outlet of the main reaction kettle is connected with a material inlet of a cooling kettle, and a material outlet of the cooling kettle is connected with a solid-liquid separation system; part of liquid outlets of the solid-liquid separation system are connected with a water treatment system, and liquid outlets of the water treatment system are respectively connected with a material mixing kettle, a pre-reaction kettle and a main reaction kettle material inlet; the jacket of the main reaction kettle is connected with a heat source system; the steam outlet of the main reaction kettle is connected with the steam inlets of the batching kettle and the pre-reaction kettle, and the steam outlet of the cooling kettle is connected with the steam inlet of the batching kettle; the cooling water inlet and outlet of the batching kettle are connected with the cooling water outlet and inlet of the cooling kettle. The method has good organic waste reduction effect, the catalyst can be recycled, and the solid product after the reaction can be recycled.
Description
Technical Field
The invention belongs to the technical field of organic waste treatment, and particularly relates to a device for improving the organic waste reduction effect through a thermocatalytic reaction.
Background
The organic waste refers to waste sludge with high water content (40-99%) and organic matter content of more than 30% of inorganic component, such as kitchen waste, organic waste residue in spraying industry, organic high-boiling residual liquid, pharmaceutical synthetic waste residue, residual sludge generated in sewage treatment plants and the like. With the rapid development of social economy, the production amount of organic wastes is increasing (forward wearing, pioneer gold, gull and the like, the organic waste treatment and disposal technology and the gas production utilization prospect [ J ] China biogas, 2008, 26 (6): 17-32.), and therefore, the organic waste reduction becomes an important problem of energy conservation and emission reduction in China.
At present, organic wastes are mainly disposed of by incineration, landfill, and the like.
Among them, incineration is the most effective and thorough organic waste disposal method, which can achieve extremely high organic waste reduction effect, but the incineration treatment cost is high, and toxic and harmful gases such as dioxin may be generated, which causes secondary pollution to the environment (strong. chemical solid waste incineration treatment and reference data analysis thereof [ J ]. chemical industry, 2013, 31 (7): 42-47.).
The landfill is to transport the organic waste to the specific landfill site to carry on the landfill disposal, this method is easy to operate, the treatment cost is lower, but if the impervious technology of the landfill is not up to standard, soil and groundwater will receive the enormous harm, may also have poisonous gas to diffuse into the atmosphere, cause the secondary pollution. In addition, landfill disposal requires a large land area, and it is not suitable for a place where land resources are in short supply to adopt this organic waste disposal method (great problem of urban environment in Zhongtao, Chenjun. Sewage treatment plant disposal shallow analysis [ J ]. environmental protection science, 1998, 24 (6): 11-12.).
Disclosure of Invention
The invention aims to solve the technical problem of providing a device which has good organic waste reduction effect, can recycle the catalyst, obviously saves energy consumption, can recycle the products after reaction and can not cause secondary environmental pollution.
In order to solve the technical problems, the technical scheme of the invention is to provide a device for realizing the high-efficiency reduction and recycling of organic waste by thermocatalysis, which is characterized in that: the device comprises a batching kettle, an organic waste feeding system is connected with a batching kettle material inlet through a pipeline, a batching kettle material outlet is respectively connected with a pre-reaction kettle material inlet and a main reaction kettle material inlet through pipelines, a pre-reaction kettle material outlet is connected with a main reaction kettle material inlet through a pipeline, a main reaction kettle material outlet is connected with a cooling kettle material inlet through a pipeline, and a cooling kettle material outlet is connected with a solid-liquid separation system through a pipeline; part of liquid outlets of the solid-liquid separation system are connected with the water treatment system through pipelines, and the liquid outlets of the water treatment system are respectively connected with the material inlet of the batching kettle, the material inlet of the pre-reaction kettle and the material inlet of the main reaction kettle through pipelines;
the jacket inlet of the main reaction kettle is connected with the outlet of the heat source system, and the inlet of the heat source system is connected with the jacket outlet of the main reaction kettle;
a steam outlet of the main reaction kettle is connected with a steam inlet of the batching kettle and a steam inlet of the pre-reaction kettle through a pipeline, a steam outlet of the cooling kettle is connected with a steam inlet of the batching kettle through a pipeline, and a non-condensable gas outlet of the batching kettle is connected with a VOCs treatment system through a pipeline;
the cooling water outlet of the batching kettle is connected with the cooling water inlet of the cooling kettle, and the cooling water outlet of the cooling kettle is connected with the cooling water inlet of the batching kettle to form a cooling water circulation system.
Preferably, the batching kettle, the pre-reaction kettle, the main reaction kettle and the cooling kettle form a main reaction system, and the organic waste feeding system, the heat source system, the solid-liquid separation system, the water treatment system and the VOCs treatment system form an auxiliary reaction system.
Preferably, a first valve, a second valve and a first pump are arranged on a pipeline between the material outlet of the batching kettle and the material inlet of the pre-reaction kettle; a first valve, a third valve and a first pump are arranged on a pipeline between the material outlet of the batching kettle and the material inlet of the main reaction kettle;
a fourth valve and a second pump are arranged on a pipeline between the pre-reaction kettle material outlet and the main reaction kettle material inlet; a fifth valve and a third pump are arranged on a pipeline between the material outlet of the main reaction kettle and the material inlet of the cooling kettle; a sixth valve and a fourth pump are arranged on a pipeline between the material outlet of the cooling kettle and the solid-liquid separation system;
a fifth pump and a seventh valve are arranged on a pipeline between the liquid outlet of the water treatment system and the material inlet of the batching kettle; a fifth pump and an eighth valve are arranged on a pipeline between the liquid outlet of the water treatment system and the material inlet of the pre-reaction kettle; a fifth pump and a ninth valve are arranged on a pipeline between the liquid outlet of the water treatment system and the material inlet of the main reaction kettle;
a tenth valve and an eleventh valve are arranged on a pipeline between the steam outlet of the main reaction kettle and the steam inlet of the batching kettle; a tenth valve and a twelfth valve are arranged on a pipeline between the steam outlet of the main reaction kettle and the steam inlet of the pre-reaction kettle;
a thirteenth valve is arranged on a pipeline between the steam outlet of the cooling kettle and the steam inlet of the batching kettle; and a fourteenth valve is arranged on a pipeline between the non-condensable gas outlet of the batching kettle and the VOCs treatment system.
More preferably, the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve, the eighth valve, the ninth valve, the tenth valve, the eleventh valve, the twelfth valve, the thirteenth valve and the fourteenth valve are all pneumatic ball valves;
the first pump is a screw pump; the second pump and the third pump are both cam type double-rotor pumps; the fourth pump is a pneumatic diaphragm pump; the fifth pump is a submersible pump.
Preferably, a first stirring motor and a first condensing coil are arranged in the batching kettle.
A second stirring motor is arranged in the pre-reaction kettle; a first thermometer, a first pressure gauge and a first safety valve are arranged on the pre-reaction kettle;
a third stirring motor is arranged in the main reaction kettle; a second thermometer, a second pressure gauge and a second safety valve are arranged on the main reaction kettle; the main reaction kettle is also connected with an inert gas circuit.
And a second condensing coil is arranged in the cooling kettle.
Preferably, the heat source system is one or two of conduction oil heating and steam heating.
Preferably, the solid-liquid separation system is one of a centrifuge, a screw stack or a filter press.
Preferably, the water treatment system adopts one or two of evaporation treatment and membrane separation process treatment; the VOCs treatment system adopts one or more of catalytic photolysis, plasma and activated carbon adsorption.
Preferably, the organic waste feed system conveys the organic waste and the catalyst into the batching kettle by a screw conveyor; the preparation method comprises the following steps that the organic waste and a catalyst are mixed and stirred uniformly by a stirring motor in a batching kettle, and part of the uniformly stirred materials are conveyed to a main reaction kettle and part of the uniformly stirred materials are conveyed to a pre-reaction kettle; starting a heat source system, and heating the main reaction kettle for reaction; after the reaction is finished, closing the heat source system and starting flash evaporation; after the flash evaporation is finished, starting a cooling water circulation system between the batching kettle and the cooling kettle, and discharging; finishing the reaction of the first batch of materials; conveying the materials in the pre-reaction kettle to the main reaction kettle, and starting a second batch of material reaction;
treating residual gas in the batching kettle through a VOCs treatment system, and cooling a mixture obtained after reaction in the kettle to enter a solid-liquid separation system for dehydration; after the dehydration is finished, part of dehydration liquid flows back to a water treatment system for treatment; after the treatment is finished, the treated dehydration liquid respectively flows back to the main reaction kettle, the pre-reaction kettle and the batching kettle, so that the catalyst is recycled, and the kettle wall can be washed; the remaining dewatering liquid is discharged to a wastewater treatment plant and the solid sludge cake is used as fuel or as an adsorbent material.
More preferably, the catalyst is an organic catalyst prepared by the following mass percentages: 0.5 to 10 percent of oxalic acid, 1 to 15 percent of acetic acid, 15 to 50 percent of propionic acid, 15 to 40 percent of lactic acid, 10 to 55 percent of citric acid and water as a solvent.
Compared with the prior art, the device for realizing the high-efficiency reduction and recycling of the organic waste by the thermocatalysis provided by the invention has the following beneficial effects:
(1) the thermocatalysis decrement device is skid-mounted integrated equipment, and is convenient to manage and operate.
(2) The heat source system of the device has two choices of heat conducting oil and steam, and a better heat supply mode can be selected according to actual requirements.
(3) The batching cauldron is equipped with the condenser coil device, and the steam flash distillation that main reation kettle produced can make the quick liquefaction of steam to the batching cauldron when, thereby improves agitator motor's work efficiency, makes organic waste and catalyst can better misce bene, and the steam flash distillation that main reation kettle produced can let the material in advance carry out the preliminary reaction when to the preliminary reaction cauldron, makes required reaction temperature and reaction time greatly reduced in main reation kettle of material, thereby the energy saving consumed.
(4) When main reation kettle unloaded to the cooling cauldron, the cooling cauldron can be full of a large amount of steam, can liquefy partly steam through the condenser coil device of cooling cauldron, and remaining steam is because atmospheric pressure effect accessible pipeline transport to batching cauldron to make this part steam obtain make full use of.
(5) VOCs that whole reaction unit produced finally collects in the batching cauldron through the pipeline, and this part VOCs passes through the pipeline again and carries to VOCs processing system to can not produce the secondary pollution problem.
(6) The device can remarkably improve the reduction effect of the device on organic wastes by adding an independently developed high-efficiency organic catalyst into the device.
(7) After the partial dehydration liquid that solid-liquid separation system obtained passes through water treatment system and handles, flow back to batching cauldron, pre-reaction cauldron and main reation kettle again to remaining catalyst in can recycle dehydration liquid, in addition, these dehydration liquids can also wash batching cauldron, pre-reaction cauldron and main reation kettle's inner wall respectively, prevent that there is the material to remain on the cauldron wall.
(8) The solid mud cake obtained by the solid-liquid separation system has the heat value content increased by 23% -32% compared with the heat value of the original machine waste, is a loose and porous active adsorption material, can be used for treating wastewater, can reduce the reaction energy consumption by 58% -80% by adding a catalyst, and has a blank experiment decrement effect of 50% -71% and a thermal catalysis experiment decrement effect of 60% -82%.
Drawings
Fig. 1 is a schematic structural diagram of an apparatus for implementing thermocatalytic efficient reduction and recycling of organic waste according to this embodiment.
Detailed Description
The invention will be further illustrated with reference to the following specific examples.
Fig. 1 is a schematic structural view of the apparatus for implementing thermocatalytic efficient reduction and recycling of organic wastes provided by this embodiment, the apparatus for implementing thermocatalytic efficient reduction and recycling of organic wastes includes an organic waste feeding system 24, the organic waste feeding system 24 is connected to a material inlet of a batching kettle a27 through a pipeline, and the organic wastes and an organic catalyst are respectively conveyed to a batching kettle a 27. The stirring motor 21 is arranged in the batching kettle A27, the stirring motor 21 is started, and the organic waste and the organic catalyst are prepared into a reaction material which is uniformly mixed.
The material outlet of the batching kettle A27 is connected with the material inlet of the main reaction kettle C34 through a pipeline. A first valve 29, a third valve 20 and a first pump 30 are arranged on a pipeline between the material outlet of the batching kettle A27 and the material inlet of the main reaction kettle C34. The inlet of the jacket 35 of the main reaction kettle 34 is connected with the outlet of the heat source system 8, and the inlet of the heat source system 8 is connected with the outlet of the jacket 35 of the main reaction kettle 34. After the materials in the batching kettle A27 are stirred uniformly, the first valve 29, the third valve 20 and the first pump 30 are opened, and part of the materials in the batching kettle A27 are conveyed to the main reaction kettle C34. After the transfer, the first valve 29, the third valve 20 and the first pump 30 are closed, and then the heat source system 8 is turned on to start the heating reaction of the main reactor C34.
The material outlet of the batching kettle A27 is also connected with the material inlet of the pre-reaction kettle B31 through a pipeline, and a first valve 29, a second valve 19 and a first pump 30 are arranged on the pipeline between the material outlet of the batching kettle A27 and the material inlet of the pre-reaction kettle B31. First valve 29, second valve 19 and first pump 30 were opened to deliver the contents of batch tank A27 to pre-reactor B31. After the delivery is complete, the first valve 29, the second valve 19 and the first pump 30 are closed.
The vapor outlet of main reactor C34 was connected to the batching vessel a27 vapor inlet and pre-reactor B31 vapor inlet by piping. A tenth valve 10 and an eleventh valve 2 are arranged on a pipeline between the steam outlet of the main reaction kettle C34 and the steam inlet of the batching kettle A27, and a tenth valve 10 and a twelfth valve 4 are arranged on a pipeline between the steam outlet of the main reaction kettle C34 and the steam inlet of the pre-reaction kettle B31. After the reaction is finished, the heat source system 8 is closed, the tenth valve 10, the eleventh valve 2 and the twelfth valve 4 are opened, and the flash evaporation is started. After the flash evaporation is finished, the tenth valve 10, the eleventh valve 2 and the twelfth valve 4 are closed.
The material outlet of the main reaction kettle C34 is connected with the material inlet of the cooling kettle D40 through a pipeline, and a fifth valve 36 and a third pump 37 are arranged on the pipeline between the material outlet of the main reaction kettle C34 and the material inlet of the cooling kettle D40. The cooling water outlet 25 of the batching kettle A27 is connected with the cooling water inlet 39 of the cooling kettle D40, and the cooling water outlet 38 of the cooling kettle D40 is connected with the cooling water inlet 26 of the batching kettle A27. The cooling water circulation system is started and then the fifth valve 36 and the third pump 37 are opened, ready to start the discharge.
The steam outlet of the cooling kettle D40 can be connected with the steam inlet of the batching kettle A27 through a pipeline, and a thirteenth valve 44 is arranged on the pipeline between the steam outlet of the cooling kettle D40 and the steam inlet of the batching kettle A27. At the same time as the discharge, the thirteenth valve 44 is opened. After the discharge is finished, the fifth valve 36, the third pump 37 and the thirteenth valve 44 are closed.
The material outlet of the pre-reaction kettle B31 is connected with the material inlet of the main reaction kettle C34 through a pipeline, and a fourth valve 32 and a second pump 33 are arranged on the pipeline between the material outlet of the pre-reaction kettle B31 and the material inlet of the main reaction kettle C34. The fourth valve 32 and the second pump 33 were opened to transfer the contents of pre-reactor B31 to main reactor C34 in preparation for the start of the second batch reaction.
The noncondensable gas outlet of the batching kettle A27 is connected with the VOCs treatment system 23 through a pipeline, and a fourteenth valve 22 is arranged on the pipeline between the noncondensable gas outlet of the batching kettle A27 and the VOCs treatment system 23. The fourteenth valve 22 is opened and the residual gas in batch still A27 is processed by VOCs processing system 23.
The material outlet of the cooling kettle D40 is connected with the solid-liquid separation system 45 through a pipeline, and a sixth valve 41 and a fourth pump 42 are arranged on the pipeline between the material outlet of the cooling kettle D40 and the solid-liquid separation system 45. The sixth valve 41 and the fourth pump 42 are opened, and the reacted mixture is introduced into the solid-liquid separation system 45 to be dehydrated.
The liquid outlet of the water treatment system 7 is respectively connected with the material inlet of the batching kettle A27, the material inlet of the pre-reaction kettle B31 and the material inlet of the main reaction kettle C34 through pipelines, and a fifth pump 6 and a seventh valve 1 are arranged on the pipeline between the liquid outlet of the water treatment system 7 and the material inlet of the batching kettle A27. A fifth pump 6 and an eighth valve 3 are arranged on a pipeline between the liquid outlet of the water treatment system 7 and the material inlet of the pre-reaction kettle B31. A fifth pump 6 and a ninth valve 5 are arranged on a pipeline between the liquid outlet of the water treatment system 7 and the material inlet of the main reaction kettle C34. After the dehydration is finished, the sixth valve 41 and the fourth pump 42 are closed, and then part of the dehydration solution is returned to the water treatment system 7 for treatment. After the treatment is finished, the fifth pump 6, the ninth valve 5, the eighth valve 3 and the seventh valve 1 are opened, and then the treated dehydration liquid respectively flows back to the main reaction kettle C, the pre-reaction kettle B and the batching kettle A, so that the catalyst is recycled, and the kettle wall can be washed. The remaining dewatering liquid is discharged to a wastewater treatment plant and the solid sludge cake is used as fuel or as an adsorbent material.
It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element may be termed a second element, and, similarly, a second element may be termed a first element, without departing from the scope of example embodiments.
While the invention has been described with respect to a preferred embodiment, it will be understood by those skilled in the art that the foregoing and other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention. Those skilled in the art can make various changes, modifications and equivalent arrangements, which are equivalent to the embodiments of the present invention, without departing from the spirit and scope of the present invention, and which may be made by utilizing the techniques disclosed above; meanwhile, any changes, modifications and variations of the above-described embodiments, which are equivalent to those of the technical spirit of the present invention, are within the scope of the technical solution of the present invention.
Claims (7)
1. The utility model provides a realize high-efficient decrement of organic waste thermocatalysis and resourceization's device which characterized in that: the device comprises a batching kettle (27), wherein an organic waste feeding system (24) is connected with a material inlet of the batching kettle (27) through a pipeline, a material outlet of the batching kettle (27) is respectively connected with a material inlet of a pre-reaction kettle (31) and a material inlet of a main reaction kettle (34) through pipelines, the material outlet of the pre-reaction kettle (31) is connected with the material inlet of the main reaction kettle (34) through a pipeline, the material outlet of the main reaction kettle (34) is connected with a material inlet of a cooling kettle (40) through a pipeline, and the material outlet of the cooling kettle (40) is connected with a solid-liquid separation system (45) through a pipeline; part of liquid outlets of the solid-liquid separation system (45) are connected with the water treatment system (7) through pipelines, and the liquid outlets of the water treatment system (7) are respectively connected with a material inlet of the batching kettle (27), a material inlet of the pre-reaction kettle (31) and a material inlet of the main reaction kettle (34) through pipelines;
an inlet of a jacket (35) of the main reaction kettle (34) is connected with an outlet of the heat source system (8), and an inlet of the heat source system (8) is connected with an outlet of the jacket (35) of the main reaction kettle (34);
a steam outlet of the main reaction kettle (34) is connected with a steam inlet of the batching kettle (27) and a steam inlet of the pre-reaction kettle (31) through pipelines, a steam outlet of the cooling kettle (40) is connected with a steam inlet of the batching kettle (27) through a pipeline, and a noncondensable gas outlet of the batching kettle (27) is connected with the VOCs treatment system (23) through a pipeline;
a cooling water outlet (25) of the batching kettle (27) is connected with a cooling water inlet (39) of a cooling kettle (40), and a cooling water outlet (38) of the cooling kettle (40) is connected with a cooling water inlet (26) of the batching kettle (27) to form a cooling water circulation system;
a first valve (29), a second valve (19) and a first pump (30) are arranged on a pipeline between the material outlet of the batching kettle (27) and the material inlet of the pre-reaction kettle (31); a first valve (29), a third valve (20) and a first pump (30) are arranged on a pipeline between the material outlet of the batching kettle (27) and the material inlet of the main reaction kettle (34);
a fourth valve (32) and a second pump (33) are arranged on a pipeline between the material outlet of the pre-reaction kettle (31) and the material inlet of the main reaction kettle (34); a fifth valve (36) and a third pump (37) are arranged on a pipeline between the material outlet of the main reaction kettle (34) and the material inlet of the cooling kettle (40); a sixth valve (41) and a fourth pump (42) are arranged on a pipeline between the material outlet of the cooling kettle (40) and the solid-liquid separation system (45);
a fifth pump (6) and a seventh valve (1) are arranged on a pipeline between the liquid outlet of the water treatment system (7) and the material inlet of the batching kettle (27); a fifth pump (6) and an eighth valve (3) are arranged on a pipeline between the liquid outlet of the water treatment system (7) and the material inlet of the pre-reaction kettle (31); a fifth pump (6) and a ninth valve (5) are arranged on a pipeline between the liquid outlet of the water treatment system (7) and the material inlet of the main reaction kettle (34);
a tenth valve (10) and an eleventh valve (2) are arranged on a pipeline between the steam outlet of the main reaction kettle (34) and the steam inlet of the batching kettle (27); a tenth valve (10) and a twelfth valve (4) are arranged on a pipeline between the steam outlet of the main reaction kettle (34) and the steam inlet of the pre-reaction kettle (31);
a thirteenth valve (44) is arranged on a pipeline between the steam outlet of the cooling kettle (40) and the steam inlet of the batching kettle (27); a fourteenth valve (22) is arranged on a pipeline between a non-condensable gas outlet of the batching kettle (27) and the VOCs treatment system (23);
a first stirring motor (21) and a first condensing coil (28) are arranged in the batching kettle (27);
a second stirring motor (17) is arranged in the pre-reaction kettle (31); the pre-reaction kettle (31) is provided with a first thermometer (18), a first pressure gauge (16) and a first safety valve (15);
a third stirring motor (12) is arranged in the main reaction kettle (34); a second thermometer (14), a second pressure gauge (13) and a second safety valve (11) are arranged on the main reaction kettle (34); the main reaction kettle (34) is also connected with an inert gas circuit (9);
a second condensing coil (43) is arranged in the cooling kettle (40);
the organic waste feed system (24) conveys the organic waste and the catalyst into a batching kettle (27) by a screw conveyor; the material mixing kettle (27) uniformly mixes and stirs the organic waste and the catalyst through a stirring motor (21), and conveys part of the uniformly stirred materials to a main reaction kettle (34) and part of the uniformly stirred materials to a pre-reaction kettle (31); starting a heat source system (8) to heat the main reaction kettle (34) for heating reaction; after the reaction is finished, closing the heat source system (8) and starting flash evaporation; after the flash evaporation is finished, a cooling water circulation system between the batching kettle (27) and the cooling kettle (40) is started, and the materials are discharged; finishing the reaction of the first batch of materials; conveying the materials in the pre-reaction kettle (31) to the main reaction kettle (34) to start a second batch of material reaction;
residual gas in the batching kettle (27) is treated through a VOCs treatment system (23), and a mixture after reaction in the cooling kettle (40) enters a solid-liquid separation system (45) for dehydration; after the dehydration is finished, part of dehydration liquid flows back to the water treatment system (7) for treatment; after the treatment is finished, the treated dehydration liquid respectively flows back to the main reaction kettle (34), the pre-reaction kettle (31) and the batching kettle (27), so that the catalyst is recycled, and the kettle wall can be washed; the remaining dewatering liquid is discharged to a wastewater treatment plant and the solid sludge cake is used as fuel or as an adsorbent material.
2. The device for realizing the high-efficiency reduction and resource utilization of the organic waste by the thermocatalysis according to claim 1, which is characterized in that: the system comprises a batching kettle (27), a pre-reaction kettle (31), a main reaction kettle (34) and a cooling kettle (40), wherein the main reaction system is formed by an organic waste feeding system (24), a heat source system (8), a solid-liquid separation system (45), a water treatment system (7) and a VOCs treatment system (23).
3. The device for realizing the high-efficiency reduction and resource utilization of the organic waste by the thermocatalysis according to claim 2, which is characterized in that: the first valve (29), the second valve (19), the third valve (20), the fourth valve (32), the fifth valve (36), the sixth valve (41), the seventh valve (1), the eighth valve (3), the ninth valve (5), the tenth valve (10), the eleventh valve (2), the twelfth valve (4), the thirteenth valve (44) and the fourteenth valve (22) are all pneumatic ball valves;
the first pump (30) is a screw pump; the second pump (33) and the third pump (37) are both cam-type dual-rotor pumps; the fourth pump (42) is an air operated diaphragm pump; the fifth pump (6) is a submersible pump.
4. The device for realizing the high-efficiency reduction and resource utilization of the organic waste by the thermocatalysis according to claim 1, which is characterized in that: the heat source system (8) is one or two of heat conduction oil heating and steam heating.
5. The device for realizing the high-efficiency reduction and resource utilization of the organic waste by the thermocatalysis according to claim 1, which is characterized in that: the solid-liquid separation system (45) is one of a centrifugal machine, a screw stacking machine or a filter press.
6. The device for realizing the high-efficiency reduction and resource utilization of the organic waste by the thermocatalysis according to claim 1, which is characterized in that: the water treatment system (7) adopts one or two of evaporation treatment and membrane separation process treatment; the VOCs treatment system (23) employs one or more of catalytic photolysis, plasma, and activated carbon adsorption.
7. The device for realizing the high-efficiency reduction and resource utilization of the organic waste by the thermocatalysis according to claim 1, which is characterized in that: the catalyst is an organic catalyst prepared according to the following mass percentages: 0.5 to 10 percent of oxalic acid, 1 to 15 percent of acetic acid, 15 to 50 percent of propionic acid, 15 to 40 percent of lactic acid, 10 to 55 percent of citric acid and water as a solvent.
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| CN106186624A (en) * | 2015-05-04 | 2016-12-07 | 刘长征 | A kind of energy-saving continuous print recycling sludge processing system |
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