CN112090949A - A energy-efficient dystopy thermal desorption system for high concentration pollutes soil - Google Patents

A energy-efficient dystopy thermal desorption system for high concentration pollutes soil Download PDF

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Publication number
CN112090949A
CN112090949A CN202010813685.7A CN202010813685A CN112090949A CN 112090949 A CN112090949 A CN 112090949A CN 202010813685 A CN202010813685 A CN 202010813685A CN 112090949 A CN112090949 A CN 112090949A
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CN
China
Prior art keywords
pipeline
link
hopper
thermal desorption
rotary kiln
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Pending
Application number
CN202010813685.7A
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Chinese (zh)
Inventor
唐晓声
李海建
王书倩
陈昱
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Jiangsu Yangtze River Delta Environmental Science And Technology Research Institute Co ltd
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Jiangsu Yangtze River Delta Environmental Science And Technology Research Institute Co ltd
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Priority to CN202010813685.7A priority Critical patent/CN112090949A/en
Publication of CN112090949A publication Critical patent/CN112090949A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09C—RECLAMATION OF CONTAMINATED SOIL
    • B09C1/00—Reclamation of contaminated soil
    • B09C1/06—Reclamation of contaminated soil thermally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/02—Crushing or disintegrating by roller mills with two or more rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • B02C4/30—Shape or construction of rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • B02C4/42—Driving mechanisms; Roller speed control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
    • F23G5/033—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment comminuting or crushing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/08—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating
    • F23G5/14—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating including secondary combustion
    • F23G5/16—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating including secondary combustion in a separate combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/20—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having rotating or oscillating drums
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/44—Details; Accessories
    • F23G5/442—Waste feed arrangements
    • F23G5/444—Waste feed arrangements for solid waste
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/44—Details; Accessories
    • F23G5/46—Recuperation of heat
    • 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
    • F23G7/14—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of contaminated soil, e.g. by oil
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
    • F23J15/025—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F23J15/04—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material using washing fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2201/00—Pretreatment
    • F23G2201/80—Shredding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2202/00—Combustion
    • F23G2202/10—Combustion in two or more stages
    • F23G2202/103—Combustion in two or more stages in separate chambers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2203/00—Furnace arrangements
    • F23G2203/20—Rotary drum furnace
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2204/00—Supplementary heating arrangements
    • F23G2204/10—Supplementary heating arrangements using auxiliary fuel
    • F23G2204/103—Supplementary heating arrangements using auxiliary fuel gaseous or liquid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2205/00—Waste feed arrangements
    • F23G2205/12—Waste feed arrangements using conveyors
    • F23G2205/122—Belt conveyor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2205/00—Waste feed arrangements
    • F23G2205/14—Waste feed arrangements using hopper or bin
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2206/00—Waste heat recuperation
    • F23G2206/10—Waste heat recuperation reintroducing the heat in the same process, e.g. for predrying
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2215/00—Preventing emissions
    • F23J2215/20—Sulfur; Compounds thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2217/00—Intercepting solids
    • F23J2217/10—Intercepting solids by filters
    • F23J2217/101—Baghouse type

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The invention relates to an efficient energy-saving ex-situ thermal desorption system for high-concentration polluted soil, which is characterized in that: including rotary kiln, second combustion chamber, sack cleaner and desulfurizing tower, the feed inlet of rotary kiln one end be connected with the auger delivery ware, the other end of rotary kiln and the one end of second combustion chamber be provided with the natural gas combustor respectively, the gas outlet of sack cleaner link to each other through the air inlet of first pipeline with the desulfurizing tower, first pipeline on install first draught fan, its characterized in that: still include pre-crushing box, material loading machine, hopper conveying mechanism and heat transfer cooler, pre-crushing box fix the top at the material loading machine left end, hopper conveying mechanism include hopper, running gear and drive mechanism, the hopper hang in the below of slide rail through running gear, running gear pass through the transfer line and set up the drive mechanism on the slide rail and link to each other. The design has the advantages of simple structure, easy manufacture, practicality and high efficiency.

Description

A energy-efficient dystopy thermal desorption system for high concentration pollutes soil
Technical Field
The invention relates to the technical field of soil remediation, in particular to an efficient energy-saving ex-situ thermal desorption system for high-concentration polluted soil.
Background
With the development of industry and agriculture and the acceleration of urbanization process, the adjustment of industrial structure and the acceleration of urbanization process, a large number of polluted enterprises relating to industries such as chemical industry, metallurgy, petroleum, transportation, light industry and the like are moved or closed in sequence. In the process of re-development and utilization of volatile pollutants in soil in a plurality of industrial enterprises removed and left sites, the volatile and semi-volatile pollutants in the soil can enter other environment media through gas-soil circulation and water-soil circulation, and can also directly enter human bodies through food chains or human breath to harm human health. Volatile and semi-volatile pollutants in the soil are listed as toxic pollutants which have high potential danger in the environment and should be preferentially controlled.
At present, the repair technology for polluted soil has two modes of in-situ repair and ex-situ repair, wherein:
the in-situ remediation of the polluted soil does not need to excavate and transport the soil, so the required engineering amount is relatively small, and the common processes comprise in-situ vapor extraction, in-situ chemical remediation and the like, but the in-situ treatment processes generally have the defects of long treatment time, low treatment efficiency, low removal rate of volatile and semi-volatile pollutants and the like, and the problems of secondary pollution and the like possibly caused by the in-situ chemical remediation process;
the common techniques for ex-situ remediation of contaminated soil include ex-situ thermal desorption treatment, ex-situ chemical remediation, etc., wherein the ex-situ thermal desorption treatment has a good effect, and the ex-situ thermal desorption treatment uses a rotary kiln as thermal desorption equipment and is widely applied. When the rotary kiln is adopted for treating the polluted soil, the polluted soil is turned in the rotary kiln and exchanges heat with the flue gas in a reverse direction, so that the aim of removing volatile and semi-volatile pollutants from the soil is fulfilled; however, the flue gas passing through the secondary combustion chamber is usually only directly cooled, and heat is not recycled, so that great energy waste can be caused, and the cost is greatly increased.
Disclosure of Invention
The invention provides an efficient energy-saving ex-situ thermal desorption system for high-concentration polluted soil, wherein a heat exchange cooler is arranged between a secondary combustion chamber and a bag-type dust collector, the heat exchange cooler can reduce the temperature in discharged air, and can collect heat and convey the heat into a rotary kiln and the secondary combustion chamber again, so that the effects of reducing cost and saving resources are achieved.
In order to solve the technical problems, the invention provides an efficient energy-saving ex-situ thermal desorption system for high-concentration polluted soil, which comprises a rotary kiln, a secondary combustion chamber, a bag-type dust collector and a desulfurization tower, wherein a feed inlet at one end of the rotary kiln is connected with a screw conveyor, natural gas burners are respectively arranged at the other end of the rotary kiln and one end of the secondary combustion chamber, an air outlet of the bag-type dust collector is connected with an air inlet of the desulfurization tower through a first pipeline, a first induced draft fan is arranged on the first pipeline, and the system is characterized in that: also comprises a pre-crushing box body, a feeding machine, a hopper conveying mechanism and a heat exchange cooler, wherein the pre-crushing box body is fixed at the top of the left end of the feeding machine, the hopper conveying mechanism comprises a hopper, a travelling mechanism and a traction mechanism, the hopper is suspended below the sliding rail through the travelling mechanism, the walking mechanism is connected with a traction mechanism arranged on the slide rail through a transmission rod, the right end of the feeding machine extends to the position right below the left end of the slide rail, the feed inlet of the screw conveyor is positioned right below the right end of the slide rail, the exhaust port of the rotary kiln is connected with the dust remover, the dust remover is communicated with the air inlet of the second combustion chamber through a second pipeline, a second induced draft fan is arranged on the second pipeline, the exhaust port of the second combustion chamber is connected with the air inlet of the heat exchange cooler, and the exhaust port of the heat exchange cooler is connected with the air inlet of the bag-type dust remover.
Further: one end of a heat exchange pipeline surrounding the surface of the heat exchange cooler is connected with a five-way valve, the five-way valve is communicated with an air inlet of the rotary kiln through a heat recycling pipeline, the five-way valve is further respectively connected with a heat treatment pipeline, a first combustor recycling pipeline and a second combustor recycling pipeline, the first combustor recycling pipeline is connected with a natural gas combustor arranged at one end of the rotary kiln and is provided with a first air blower, the second combustor recycling pipeline is connected with a natural gas combustor arranged at one end of the second combustion chamber and is provided with a second air blower, and the heat recycling pipeline and the heat treatment pipeline are both provided with switch valves.
And further: the gas vent of second combustion chamber link to each other through tesla valve and heat transfer cooler's air inlet, tesla valve about both ends install first three-way valve and second three-way valve respectively, first three-way valve link to each other with the gas vent and the water charging pipeline of second combustion chamber respectively, the water charging pipeline on install the water pump and with deposit the water tank body and link to each other, second three-way valve link to each other with heat transfer cooler's air inlet and drainage pipe respectively, drainage pipe link to each other with the waste residue storage box again.
And further: the bottom of desulfurizing tower link to each other with the water treatment pond through the recovery pipeline, the water treatment pond link to each other with the shower of setting in desulfurizing tower inside through circulating line again, circulating line on be provided with the second water pump.
And further: the feeding machine comprises a horizontal material guide cover, an inclined material guide cover, a driving conveying wheel, a first driven conveying wheel, a second driven conveying wheel and a conveying belt, the horizontal material guide cover and the inclined material guide cover are connected into a whole left and right, the pre-crushing box body is fixed at the top of the left end of the horizontal material guide cover, the driving conveying wheel and the first driven conveying wheel are respectively installed in the left end and the right end of the horizontal material guide cover, the second driven conveying wheel extends out of the right end of the inclined material guide cover through a fixing frame and is located right below the left end of a sliding rail, and the conveying belt is sleeved on the outer sides of the driving conveying wheel, the first driven conveying wheel and the second driven conveying wheel.
And further: the right end of the inclined material guide cover is also detachably connected with a scraping plate, and the scraping plate is contacted with the bottom of a conveying belt extending out of the inclined material guide cover.
And further: the hopper connect on the trip shaft, the both ends of trip shaft stretch out and rotate respectively and connect on left socle and right branch frame from the both sides wall of hopper, the trip shaft link to each other with the servo motor who fixes on the right branch frame again, the hopper rotate along with the trip shaft through servo motor's drive, the top of left socle and right branch frame respectively be provided with a running gear, running gear include walking support and fix two upper and lower leading wheels in walking support, two upper and lower leading wheels contact with the upper and lower surface of slide rail respectively.
And further: the traction mechanism comprises a traction support, an auxiliary support, a friction wheel, a pressing wheel, a screw rod and a limiting nut, wherein the auxiliary support is arranged in the lower end of the traction support, the upper end of the screw rod is fixed at the bottom of the auxiliary support, a threaded hole matched with the screw rod is formed in the bottom of the traction support, the lower end of the screw rod penetrates through the threaded hole and is connected with the limiting nut, the limiting nut is in contact with the bottom of the traction support, the friction wheel is arranged in the traction support and is connected with a walking motor fixed on the outer wall of the traction support, the pressing wheel is connected in the auxiliary support and is positioned right below the friction wheel, and the friction wheel and the pressing wheel are respectively in contact with the upper surface and the lower surface of the sliding rail.
And further: the pre-crushing box body is formed by connecting a material guide box body and a crushing box body into a whole up and down, two first crushing rollers and three second crushing rollers are connected in the crushing box body, the two first crushing rollers are arranged in a straight line and are respectively sleeved on a first rotating shaft, a chain wheel is respectively sleeved on the two first rotating shafts, one of the two chain wheels is connected with a first rotating motor, the two chain wheels are connected with each other through chains, the three second crushing rollers are also arranged in a straight line and are respectively sleeved on a second rotating shaft, the three second rotating shafts are respectively connected with a first transmission gear, the second rotating shaft positioned in the middle is also connected with a second rotating motor, a second transmission gear is arranged between every two adjacent first transmission gears, the second transmission gears are connected to the side wall of the crushing box body through a third rotating shaft, and two adjacent first transmission gears are connected with each other through the second transmission gear located between the two adjacent first transmission gears.
And further: the material guide box body is wide at the top and narrow at the bottom, the crushing box body is wide at the top and narrow at the bottom, and each first crushing roller is positioned right above the space between two adjacent second crushing rollers.
After the structure is adopted, the heat exchange cooler is arranged between the secondary combustion chamber and the bag-type dust collector, the temperature in the discharged air can be reduced through the heat exchange cooler, heat can be collected and conveyed into the rotary kiln and the secondary combustion chamber again, and the effects of reducing cost and saving resources are achieved; according to the invention, the Tesla valve is arranged between the secondary combustion chamber and the heat exchange cooler, and the time for the discharged hot gas to enter the heat exchange cooler is reduced through the special structure of the Tesla valve, so that the loss of heat in the conveying process is reduced.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a block diagram of the present invention.
Fig. 2 is a partial structural view of the present invention.
Fig. 3 is a structural view of the traction mechanism.
Fig. 4 is an internal structure view of the preliminary grinding tank.
Fig. 5 is an internal structural view of the tesla valve.
Detailed Description
As shown in figure 1, the high-efficiency energy-saving ex-situ thermal desorption system for high-concentration contaminated soil comprises a rotary kiln 6, a secondary combustion chamber 13, a bag-type dust collector 21 and a desulfurizing tower 22, wherein a feed inlet at one end of the rotary kiln is connected with a screw conveyor 5, the other end of the rotary kiln and one end of the secondary combustion chamber are respectively provided with a natural gas burner 8, a gas outlet of the bag-type dust collector is connected with a gas inlet of the desulfurizing tower through a first pipeline, a first draught fan 23 is installed on the first pipeline, the system further comprises a pre-crushing box body 1, a feeding machine 2, a hopper conveying mechanism and a heat exchange cooler 19, the pre-crushing box body is fixed at the top of the left end of the feeding machine, the hopper conveying mechanism comprises a hopper 3, a travelling mechanism and a traction mechanism, the hopper is hung below a sliding rail 4 through the travelling mechanism, and the travelling mechanism is connected with the traction mechanism arranged on the sliding rail 4 through, the right-hand member of material loading machine extend the slide rail left end under, auger delivery ware's feed inlet be located the slide rail right-hand member under, the gas vent of rotary kiln link to each other with dust remover 7, dust remover 7 be linked together through the air inlet of second pipeline with the second combustion chamber, the second pipeline on install second draught fan 9, the gas vent of second combustion chamber link to each other with the air inlet of heat transfer cooler, the gas vent of heat transfer cooler link to each other with the air inlet of sack cleaner. Soil drops into the feeder after smashing through the precomminution box, then carry in the feeder hopper through the feeder, make the hopper carry directly over the screw conveyer feed inlet through drive mechanism's effect, then upset hopper pours soil into screw conveyer in and carries into the rotary kiln through screw conveyer, soil gets rid of the impurity in the soil through the heating in the rotary kiln, the mist continues the burning after getting into two combustion chambers, carry out further edulcoration, the waste gas after the further processing is carried into sack cleaner 21 and desulfurizing tower 22 after the heat transfer cooler cooling in proper order, carry out the further processing through sack cleaner and desulfurizing tower. According to the invention, the heat exchange cooler is arranged between the secondary combustion chamber and the bag-type dust collector, so that the temperature in the discharged air can be reduced, heat can be collected and conveyed into the rotary kiln and the secondary combustion chamber again through the heat exchange cooler, and the effects of reducing cost and saving resources are achieved.
As shown in fig. 1, one end of a heat exchange pipeline surrounding the surface of the heat exchange cooler is connected with a five-way valve 27, the five-way valve is communicated with an air inlet of the rotary kiln through a heat recycling pipeline, the five-way valve is also respectively connected with a heat treatment pipeline, a first combustor recycling pipeline and a second combustor recycling pipeline, the first combustor recycling pipeline is connected with a natural gas combustor arranged at one end of the rotary kiln and is provided with a first air blower 11, the second combustor recycling pipeline is connected with a natural gas combustor arranged at one end of the second combustion chamber and is provided with a second air blower 12, and the heat recycling pipeline and the heat treatment pipeline are both provided with switch valves.
The exhaust port of the second combustion chamber shown in fig. 1 and 5 is connected with the air inlet of the heat exchange cooler through a tesla valve 14, a first three-way valve 15 and a second three-way valve 16 are respectively installed at the left end and the right end of the tesla valve, the first three-way valve is respectively connected with the exhaust port and the water filling pipeline of the second combustion chamber, a water pump 26 is installed on the water filling pipeline and is connected with a water storage tank body 17, the second three-way valve is respectively connected with the air inlet and the water drainage pipeline of the heat exchange cooler, and the water drainage pipeline is connected with a waste residue storage tank 18. According to the invention, the Tesla valve is arranged between the secondary combustion chamber and the heat exchange cooler, and the time for the discharged hot gas to enter the heat exchange cooler is reduced through the special structure of the Tesla valve, so that the loss of heat in the conveying process is reduced; and can wash the tesla valve through starting the water pump, get rid of the impurity that the gas brought, prevent that the tesla valve from taking place unnecessary jam.
The bottom of the desulfurization tower shown in fig. 1 is connected with a water treatment tank 24 through a recovery pipeline, the water treatment tank is connected with a spray pipe arranged inside the desulfurization tower through a circulating pipeline, and a second water pump 25 is arranged on the circulating pipeline.
The feeding machine shown in fig. 2 comprises a horizontal material guiding cover 2-1, an inclined material guiding cover 2-2, a driving conveying wheel 2-3, a first driven conveying wheel 2-4, a second driven conveying wheel 2-5 and a conveying belt 2-6, wherein the horizontal material guiding cover and the inclined material guiding cover are connected into a whole left and right, the pre-crushing box body is fixed at the top of the left end of the horizontal material guiding cover, the driving conveying wheel 2-3 and the first driven conveying wheel 2-4 are respectively installed in the left end and the right end of the horizontal material guiding cover, the second driven conveying wheel extends out of the right end of the inclined material guiding cover through a fixing frame and is located right below the left end of a sliding rail, and the conveying belt is sleeved on the outer sides of the driving conveying wheel, the first driven conveying wheel and the second driven conveying wheel.
The right end of the inclined material guiding cover shown in fig. 2 is also detachably connected with a scraping plate 2-7, the scraping plate is contacted with the bottom of the conveying belt extending out of the inclined material guiding cover, and soil remained on the conveying belt can be scraped into the feeding hopper through the scraping plate, so that the effect of increasing the practical performance of the inclined material guiding cover is achieved.
The hopper as shown in figure 1 is connected to a turnover shaft, two ends of the turnover shaft extend out of two side walls of the hopper and are respectively and rotatably connected to a left support 3-2 and a right support 3-3, the turnover shaft is connected with a servo motor 3-4 fixed on the right support, the hopper rotates along with the turnover shaft under the drive of the servo motor, the tops of the left support and the right support are respectively provided with a traveling mechanism, the traveling mechanism comprises a traveling support 3-5 and an upper guide wheel 3-6 and a lower guide wheel 3-6 which are fixed in the traveling support, and the upper guide wheel and the lower guide wheel are respectively contacted with the upper surface and the lower surface of a sliding rail.
The traction mechanism shown in figure 3 comprises a traction bracket 3-7, an auxiliary bracket 3-12, a friction wheel 3-8, a pressing wheel 3-9, a screw rod 3-13 and a limit nut 3-14, the auxiliary support is arranged in the lower end of the traction support, the upper end of the screw rod is fixed at the bottom of the auxiliary support, the bottom of the traction bracket is provided with a threaded hole matched with the screw rod, the lower end of the screw rod passes through the threaded hole and is connected with a limit nut, the limit nut is contacted with the bottom of the traction bracket, the friction wheel is arranged in the traction bracket and is connected with a traveling motor 3-10 fixed on the outer wall of the traction bracket, the pinch roller is connected in the auxiliary support and is located under the friction wheel, and the friction wheel and the pinch roller are respectively contacted with the upper surface and the lower surface of the sliding rail. This design can change the height of auxiliary stand through the position of rotating the screw rod and adjusting stop nut to make the pinch roller contact with the bottom of slide rail all the time, played the effect that increases its practicality.
As shown in figure 4, the pre-crushing box body is composed of a material guiding box body 1-1 and a crushing box body 1-2 which are connected into a whole up and down, the crushing box body is also connected with two first crushing rollers 1-3 and three second crushing rollers 1-7, the two first crushing rollers are arranged in a straight line and are respectively sleeved on a first rotating shaft 1-4, two first rotating shafts are respectively sleeved with a chain wheel 1-5 and one of the chain wheels is connected with a first rotating motor, the two chain wheels are connected with each other through chains 1-6, the three second crushing rollers are also arranged in a straight line and are respectively sleeved on a second rotating shaft 1-8, the three second rotating shafts are respectively connected with a first transmission gear 1-9 and the middle second rotating shaft is also connected with a second rotating motor, a second transmission gear 1-10 is arranged between the two adjacent first transmission gears, the second transmission gears are connected to the side wall of the crushing box body through third rotating shafts 1-11, and two adjacent first transmission gears are connected with each other through the second transmission gear positioned between the two adjacent first transmission gears; the material guide box body is wide at the top and narrow at the bottom, the crushing box body is wide at the top and narrow at the bottom, and each first crushing roller is positioned right above the space between two adjacent second crushing rollers. This design improves the heating efficiency of rotary kiln through smashing soil.

Claims (10)

1. The utility model provides an energy-efficient dystopy thermal desorption system for high concentration pollutes soil, includes rotary kiln (6), two combustion chambers (13), sack cleaner (21) and desulfurizing tower (22), the feed inlet of rotary kiln one end be connected with auger delivery ware (5), the other end of rotary kiln and the one end of two combustion chambers be provided with natural gas burner (8) respectively, the gas outlet of sack cleaner link to each other through the air inlet of first pipeline with the desulfurizing tower, first pipeline on install first draught fan (23), its characterized in that: still include pre-crushing box (1), material loading machine (2), hopper conveying mechanism and heat transfer cooler (19), pre-crushing box fix the top at the material loading machine left end, hopper conveying mechanism include hopper (3), running gear and drive mechanism, the hopper hang in the below of slide rail (4) through running gear, running gear pass through transfer line (3-11) and link to each other with the drive mechanism who sets up on slide rail (4), the right-hand member of material loading machine extend under the slide rail left end, the feed inlet of auger delivery ware be located under the slide rail right-hand member, the gas vent of rotary kiln link to each other with dust remover (7), dust remover (7) be linked together through the air inlet of second pipeline and second combustion chamber, the second pipeline on install second draught fan (9), the gas vent of second combustion chamber link to each other with heat transfer cooler's air inlet, and the exhaust port of the heat exchange cooler is connected with the air inlet of the bag-type dust collector.
2. The efficient energy-saving ex-situ thermal desorption system for high-concentration contaminated soil according to claim 1, wherein: one end of a heat exchange pipeline surrounding the surface of the heat exchange cooler is connected with a five-way valve (27), the five-way valve is communicated with an air inlet of the rotary kiln through a heat recycling pipeline, the five-way valve is also respectively connected with a heat treatment pipeline, a first combustor recycling pipeline and a second combustor recycling pipeline, the first combustor recycling pipeline is connected with a natural gas combustor arranged at one end of the rotary kiln and is provided with a first air blower (11), the second combustor recycling pipeline is connected with a natural gas combustor arranged at one end of the second combustion chamber and is provided with a second air blower (12), and the heat recycling pipeline and the heat treatment pipeline are both provided with switch valves.
3. The efficient energy-saving ex-situ thermal desorption system for high-concentration contaminated soil according to claim 1, wherein: the gas vent of second combustion chamber link to each other through tesla valve (14) and heat transfer cooler's air inlet, tesla valve about both ends install first three-way valve (15) and second three-way valve (16) respectively, first three-way valve link to each other with the gas vent and the water charging pipeline of second combustion chamber respectively, the water charging pipeline on install water pump (26) and link to each other with depositing water tank body (17), the second three-way valve link to each other with heat transfer cooler's air inlet and drainage pipe respectively, drainage pipe link to each other with waste residue storage box (18) again.
4. The efficient energy-saving ex-situ thermal desorption system for high-concentration contaminated soil according to claim 1, wherein: the bottom of desulfurizing tower link to each other with water treatment pond (24) through the recovery pipeline, the water treatment pond link to each other with the shower of setting in desulfurizing tower inside through circulating line again, circulating line on be provided with second water pump (25).
5. The efficient energy-saving ex-situ thermal desorption system for high-concentration contaminated soil according to claim 1, wherein: the feeding machine comprises a horizontal material guide cover (2-1), an inclined material guide cover (2-2), a driving conveying wheel (2-3), a first driven conveying wheel (2-4), a second driven conveying wheel (2-5) and a conveying belt (2-6), wherein the horizontal material guide cover and the inclined material guide cover are connected into a whole from left to right, a pre-crushing box body is fixed at the top of the left end of the horizontal material guide cover, the driving conveying wheel (2-3) and the first driven conveying wheel (2-4) are respectively installed in the left end and the right end of the horizontal material guide cover, the second driven conveying wheel extends out of the right end of the inclined material guide cover through a fixing frame and is located right below the left end of a sliding rail, and the conveying belt is sleeved on the outer sides of the driving conveying wheel, the first driven conveying wheel and the second driven conveying wheel.
6. The efficient energy-saving ex-situ thermal desorption system for high-concentration contaminated soil according to claim 5, wherein: the right end of the inclined material guiding cover is also detachably connected with a scraping plate (2-7), and the scraping plate is contacted with the bottom of a conveying belt extending out of the inclined material guiding cover.
7. The efficient energy-saving ex-situ thermal desorption system for high-concentration contaminated soil according to claim 1, wherein: the hopper is connected to the turnover shaft, two ends of the turnover shaft extend out of two side walls of the hopper and are respectively connected to the left support (3-2) and the right support (3-3) in a rotating mode, the turnover shaft is connected with a servo motor (3-4) fixed on the right support, the hopper rotates along with the turnover shaft under the driving of the servo motor, the tops of the left support and the right support are respectively provided with a traveling mechanism, each traveling mechanism comprises a traveling support (3-5) and upper and lower guide wheels (3-6) fixed in the traveling supports, and the upper and lower guide wheels are respectively contacted with the upper and lower surfaces of the sliding rail.
8. The efficient energy-saving ex-situ thermal desorption system for high concentration contaminated soil according to claim 7, wherein: the traction mechanism comprises a traction bracket (3-7), an auxiliary bracket (3-12), a friction wheel (3-8), a pressing wheel (3-9), a screw (3-13) and a limit nut (3-14), the auxiliary support is arranged in the lower end of the traction support, the upper end of the screw rod is fixed at the bottom of the auxiliary support, the bottom of the traction bracket is provided with a threaded hole matched with the screw rod, the lower end of the screw rod passes through the threaded hole and is connected with a limit nut, the limit nut is contacted with the bottom of the traction bracket, the friction wheel is arranged in the traction bracket and is connected with a walking motor (3-10) fixed on the outer wall of the traction bracket, the pinch roller is connected in the auxiliary support and is located under the friction wheel, and the friction wheel and the pinch roller are respectively contacted with the upper surface and the lower surface of the sliding rail.
9. The efficient energy-saving ex-situ thermal desorption system for high-concentration contaminated soil according to claim 1, wherein: the pre-crushing box body is formed by connecting a material guide box body (1-1) and a crushing box body (1-2) into a whole up and down, two first crushing rollers (1-3) and three second crushing rollers (1-7) are connected in the crushing box body, the two first crushing rollers are arranged in a straight line shape and are respectively sleeved on a first rotating shaft (1-4), two first rotating shafts are respectively sleeved with a chain wheel (1-5) and one of the chain wheels is connected with a first rotating motor, the two chain wheels are connected with each other through chains (1-6), the three second crushing rollers are also arranged in a straight line shape and are respectively sleeved on a second rotating shaft (1-8), the three second rotating shafts are respectively connected with a first transmission gear (1-9) and the second rotating shaft positioned in the middle is also connected with a second rotating motor, a second transmission gear (1-10) is arranged between every two adjacent first transmission gears, the second transmission gears are connected to the side wall of the crushing box body through third rotating shafts (1-11), and the two adjacent first transmission gears are connected with each other through the second transmission gear located between the two adjacent first transmission gears.
10. An efficient energy-saving ex-situ thermal desorption system for high concentration contaminated soil according to claim 9, wherein: the material guide box body is wide at the top and narrow at the bottom, the crushing box body is wide at the top and narrow at the bottom, and each first crushing roller is positioned right above the space between two adjacent second crushing rollers.
CN202010813685.7A 2020-08-13 2020-08-13 A energy-efficient dystopy thermal desorption system for high concentration pollutes soil Pending CN112090949A (en)

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