CN209849538U - Soil thermal desorption integrated device - Google Patents

Abstract

The utility model discloses a soil thermal desorption integrated device, which comprises a thermal desorption box, wherein the thermal desorption box is used for carrying out heat treatment on the soil after pretreatment, the inlet end of the upper end of the thermal desorption box is provided with a feed hopper, the lower end of the feed hopper is provided with a plurality of shunt tubes, the interior of the thermal desorption box below the shunt tubes is provided with a heating pipe for heating, hot oil is filled in the heating pipe, the bottom of the thermal desorption box is provided with a transmission belt for bearing the soil, the input end of the transmission belt is provided with a driving motor, the utility model is improved aiming at the defects existing in the prior art, the oil in the thermal desorption box is preheated by utilizing the principles of evaporation heat absorption and condensation heat release of a refrigerant, thereby completing the recycling of heat, and the cold water generated by an evaporator is sent into a soil cooling box and a dust removal separation box so as to complete the further recycling of the heat, meanwhile, the dust removal effect is improved, two purposes are achieved at one stroke, and the practicability is high.

Description

Soil thermal desorption integrated device

Technical Field

The utility model relates to a soil remediation technical field specifically is a soil thermal desorption integrated device.

Background

Nowadays, with the addition and removal of petroleum, chemical engineering, gas stations and other places, a large amount of benzene series, chlorinated hydrocarbon, chlorinated benzene and other volatile organic pollutants and heavy metals are distributed in soil and shallow groundwater in a large amount, and the method has the characteristics of high concentration, high toxicity and easy diffusion, poses serious threats to the ecological environment and human health, and influences the re-development and utilization of land.

The thermal desorption technology has the obvious advantages of high treatment efficiency, short restoration period and the like, and is widely applied to restoration treatment of volatile and semi-volatile polluted sites. The thermal desorption technique is a physical separation technique, and is actually a process of transferring pollutants from soil into tail gas, and finally removing the pollutants by a tail gas treatment system. Although the thermal desorption treatment capacity of pollutants is strong, the method also has the problems of large energy consumption and secondary pollution caused by poor tail gas treatment.

Patent (CN 207204845U) relates to an indirect thermal desorption soil repair system and includes burner, indirect thermal desorption device, steam condensing equipment and water treatment facilities, the utility model discloses utilize the chain to drive the scraper blade and replace the auger to carry soil can avoid the moisture content high, the cohesive soil adhesion is at the auger wall, long-time extrusion accumulation blocks the auger, indirect thermal desorption device business turn over material mouth is equipped with star airlock and can effectively prevent that the organic matter gas leakage equipment that thermal desorption produced from leading to secondary pollution, but this device has that calorific loss is serious, consumes big grade shortcoming of money. The patent (CN 107855354A) discloses a thermal desorption repair device and method for organic contaminated soil, which comprises a thermal desorption unit, a cooling unit, a waste gas disposal unit, a tail gas discharge unit and a system control unit respectively electrically connected with the thermal desorption unit, the waste gas disposal unit and the tail gas discharge unit, wherein the thermal desorption unit, the cooling unit, the waste gas disposal unit and the tail gas discharge unit are sequentially communicated through pipelines, the device can adjust the temperature and the flow rate of gas according to real-time monitoring, perform thermal desorption treatment on volatile organic compounds and semi-volatile organic compound contaminated soil, although the desorbed organic pollutants pass through an efficient and energy-saving organic waste gas treatment technology, the tail gas discharge reaches the standard, but no dust removal device is arranged in the gas discharge direction, subsequent gas treatment is hindered, the thermal desorption device is simple, pollutants are not easily and fully discharged, the heat of the treated soil and the gas is quickly dissipated, the cost is, the treated soil may be mixed with polluted gas, and the direct discharge is easy to cause secondary pollution.

Therefore, how to reduce the operation energy consumption of thermal desorption equipment, fully discharge pollutants, save energy and reduce emission is an urgent problem to be solved by the current thermal desorption repair technology.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a soil thermal desorption integrated device to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a soil thermal desorption integrated device, includes the thermal desorption case, the thermal desorption case is used for carrying out heat treatment to the soil after the preliminary treatment, thermal desorption case upper end entrance point is equipped with the loading hopper, the loading hopper lower extreme is equipped with a plurality of shunt tubes, the thermal desorption incasement portion of shunt tubes below is equipped with the heating pipe that is used for the heating, and the inside packing of heating pipe has hot fluid, the bottom is equipped with the transmission band that is used for accepting soil in the thermal desorption incasement, and the input of transmission band is equipped with driving motor, the transmission band right-hand member is equipped with the guide passageway that is used for the discharge material.

The discharge end of the material guide channel is connected with the feed end of the soil cooling box, a cooling guide frame which is used for guiding soil and facilitating soil heat dissipation is arranged inside the soil cooling box, the cooling guide frame comprises a plurality of cross-arranged baffle plates, cold water cavities are arranged inside the baffle plates, the adjacent baffle plates are communicated through communicating pipes, the water outlet end of the baffle plate at the top is provided with a water outlet pipe, and the water inlet end of the baffle plate at the bottom is provided with a water inlet pipe.

The extraction opening on the right side of the thermal desorption box is connected with an extraction pipe, the right end of the extraction pipe is connected with an extraction pump, the exhaust end of the extraction pump is connected with a dust removal separation box, and a filter screen plate for filtering exhaust gas is arranged in the dust removal separation box.

The exhaust end of the dust removal separation box is connected with a heat return box through a communicating pipe, an evaporator used for absorbing exhaust heat is arranged on the heat return box, a refrigerant inlet and a refrigerant outlet of the evaporator are correspondingly communicated with a refrigerant inlet and a refrigerant outlet of the pressure scaling heat box through refrigerant pipes, a compressor for compressing the refrigerant is arranged on the refrigerant pipe on the left side, an expansion valve is arranged on the refrigerant pipe on the right side, a preheating oil tank is arranged inside the pressure scaling heat box, the preheating oil tank forms a circulation loop through the heating pipe inside the heat release box, and an oil pipe connected with the oil inlet end of the heating pipe is provided with a circulating liquid pump and a heat supplementing box for heating the oil.

And the exhaust end of the thermal reflux box is connected with a tail gas treatment box.

As a further aspect of the present invention: the bottom is equipped with the washing pond that is used for handling the exhaust in the tail gas treatment case, the inlet end of tail gas treatment case is equipped with and is used for introducing the inside guiding tube of washing pond with gas, the exhaust end department of tail gas treatment case is equipped with supplementary air discharge pump.

As a further aspect of the present invention: the connecting position of the exhaust pipe is positioned on the right side of the heat desorption box between the heating pipe and the conveying belt.

As a further aspect of the present invention: the bottom is equipped with the catch basin in the heating power backward flow case, and the surface of water and the evaporimeter contact of catch basin just so can reduce the temperature of catch basin through the evaporimeter, the inside working shaft that is equipped with of catch basin, the outlet end of working shaft pass through the inlet tube on the aqueduct connection cooling water conservancy diversion frame, just so can send cold water into inside the baffling board to the cooling effect to soil has been improved.

As a further aspect of the present invention: the water outlet pipe on the cooling diversion frame is connected with the buffer box arranged at the top of the dust removal separation box through the water guide pipe, the bottom of the buffer box is connected with the top of the dust removal separation box through a plurality of water leakage holes, and the water discharged from the baffle plate enters the buffer box and then forms a spraying area in the dust removal separation box, so that the air is washed.

As a further aspect of the present invention: the dust removal separator box right side is equipped with the drinking-water pipe, and the end of drawing water of drinking-water pipe is located below the inside liquid level of dust removal separator box, and the drinking-water union coupling suction pump, the play water end connection heating power backward flow case of suction pump.

As a further aspect of the present invention: the water pump is internally provided with an active carbon filter screen.

As a further aspect of the present invention: the filter is the slope setting, and right side filter surface is towards oblique top.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses drawback to prior art existence improves, utilizes the exothermic principle of evaporation heat absorption and condensation of refrigerant to come to preheat the fluid in the thermal desorption case to the completion is to thermal recycle, thereby accomplishes the further recovery to the heat in sending into soil cooling box and the dust removal separator box through the cold water that produces the evaporimeter, has also improved dust removal effect simultaneously, kills two birds with one stone, and the practicality is strong.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the middle cooling diversion frame of the present invention.

Wherein: the device comprises a thermal desorption box 1, a charging hopper 12, a shunt pipe 13, a heating pipe 14, a driving motor 15, a transmission belt 16, a material guide channel 17, a soil cooling box 2, a cooling guide frame 21, a baffle plate 211, a communicating pipe 212, a water outlet pipe 213, a water inlet pipe 214, a dust removal separation box 3, a filter screen plate 31, a cache box 32, a water suction pump 33, a thermal power return box 4, an evaporator 41, a refrigerant pipe 42, an expansion valve 43, a compression heat release box 44, a compressor 45, a circulating liquid pump 46, a hot compensation box 47, an air suction pipe 48, an air suction pump 49, a tail gas treatment box 5, a guide pipe 51, an auxiliary exhaust pump 52 and a washing pool 53.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

Please refer to fig. 1-2, in an embodiment of the present invention, a soil thermal desorption integrated apparatus, includes a thermal desorption box 1, the thermal desorption box 1 is used for heat treatment of the pretreated soil, an inlet end of an upper end of the thermal desorption box 1 is provided with a hopper 12, a plurality of shunt tubes 13 are provided at a lower end of the hopper 12, a heating pipe 14 for heating is provided inside the thermal desorption box 1 below the shunt tubes 13, the heating pipe 14 is filled with hot oil, a transmission belt 16 for receiving the soil is provided at a bottom of the thermal desorption box 1, an input end of the transmission belt 16 is provided with a driving motor 15, a material guiding channel 17 for discharging the material is provided at a right end of the transmission belt 16, and the thermally desorbed soil enters a next cooling procedure under the transmission of the transmission belt 16.

The discharge end of guide passageway 17 is connected with the feed end of soil cooling tank 2, soil cooling tank 2 is inside to be equipped with and to be used for guiding soil and the radiating cooling water conservancy diversion frame 21 of soil of being convenient for, cooling water conservancy diversion frame 21 includes the baffling board 211 of a plurality of cross arrangement, the inside cold water chamber that is equipped with of baffling board 211, through communicating pipe 212 intercommunication between the adjacent baffling board 211, the play water end of the baffling board 211 of the top is equipped with outlet pipe 213, and the end of intaking of the baffling board of downside is equipped with inlet tube 214.

The extraction opening on the right side of the thermal desorption box 1 is connected with an extraction pipe 48, the right end of the extraction pipe 48 is connected with an extraction pump 49, the exhaust end of the extraction pump 49 is connected with the dust removal separation box 3, and a filter screen plate 31 for filtering exhaust gas is arranged inside the dust removal separation box 3, so that dust removal processing can be completed after the air passes through the dust removal separation box 3.

The exhaust end of the dust-removing separation box 3 is connected with a thermal power return box 4 through a communicating pipe, an evaporator 41 for absorbing exhaust heat is arranged on the thermal power return box 4, a refrigerant inlet and a refrigerant outlet of the evaporator 41 are correspondingly communicated with a refrigerant inlet and a refrigerant outlet of a pressure-scaling heat box 44 through a refrigerant pipe 42, a compressor 45 for compressing the refrigerant is arranged on the refrigerant pipe 42 on the left side, an expansion valve 43 is arranged on the refrigerant pipe 42 on the right side, a preheating oil tank is arranged inside the pressure-scaling heat box, the preheating oil tank forms a circulating loop with the heating pipe 14 inside the heat desorption box 1 through the refrigerant pipe, a circulating liquid pump 46 and a heat compensation box 47 for heating the oil are arranged on an oil pipe connected with the oil inlet end of the heating pipe 14, the refrigerant is compressed into the pressure-scaling heat box 44 under the action of the compressor 45, and the oil enters the preheating oil box to absorb the heat in the pressure-scaling heat box 44 under the action of, and the heat is conveyed to the heating pipe 14 in the heat desorption box 1, thereby realizing the recycling of the heat, and the hot compensation box 47 is arranged for auxiliary heating, so that the problem of insufficient temperature of oil liquid is avoided, the refrigerant enters the evaporator 41 through the expansion valve 43 after being cooled in the compression heat release box 44 and is expanded, thereby absorbing the heat in the thermal power reflux box 4, thereby forming a thermal circulation structure, continuously conveying the heat in the exhaust gas back to the heat desorption box 1, and further reducing the energy consumption in the heat desorption box 1.

The exhaust end of the thermal power reflux box 4 is connected with an exhaust gas treatment box 5, a washing pool 53 for treating exhaust gas is arranged at the bottom in the exhaust gas treatment box 5, a guide pipe 51 for introducing gas into the washing pool 53 is arranged at the air inlet end of the exhaust gas treatment box 5, an auxiliary exhaust pump 52 is arranged at the exhaust end of the exhaust gas treatment box 5, the auxiliary exhaust pump 52 is arranged to help the gas to enter the washing pool 53, and the washing liquid in the washing pool 53 is arranged according to the content of the exhaust gas in the exhaust gas.

The connecting position of the air exhaust pipe 48 is located on the right side of the heat desorption box 1 between the heating pipe 14 and the conveying belt 16, so that negative pressure generated by air exhaust can not only assist in blanking but also exhaust air in the soil cooling box 2, and therefore the cooling effect of soil in the soil cooling box 2 is assisted.

Example 2

The difference from example 1 is: in order to further improve the heat recovery effect, a water collecting tank is arranged at the bottom in the thermal reflux box 4, the water surface of the water collecting tank is in contact with the evaporator 41, so that the temperature of the water collecting tank can be reduced through the evaporator 41, a water supply pump is arranged in the water collecting tank, the water outlet end of the water supply pump is connected with a water inlet pipe 214 on the cooling guide frame 21 through a water guide pipe, so that cold water can be sent into the baffle plate 211, and the cooling effect on soil is improved;

the outlet pipe 213 on the cooling water conservancy diversion frame 21 passes through the buffer tank 32 that the aqueduct connection set up at dust removal separator box 3 top, be connected through a plurality of hole that leaks between buffer tank 32 bottom and the dust removal separator box 3 top, when in actual use, can form in dust removal separator box 3 after the discharged water gets into buffer tank 32 from baffling board 211 and spray the district, thereby accomplish the washing to the air, this kind of spraying mode can form the water curtain on filter plate 31 surface in addition, help improving the filter effect, and spray water here can wash down the dust on the filter plate 31, thereby avoid filter plate 31's jam, the filter effect has been improved.

Dust removal separator box 3 right side is equipped with the drinking-water pipe, and the end of drawing water of drinking-water pipe is located below the inside liquid level of dust removal separator box 3, and the drinking-water union coupling suction pump, and heating power backward flow case 4 is connected to the play water end of suction pump 33, the built-in active carbon filter screen of suction pump 33 just so avoids the dust to get into heating power backward flow case 4 along with liquid, thereby accomplishes the further recovery to the heat through sending into the cold water that evaporimeter 4 produced here in soil cooling box 2 and dust removal separator box 3, has also improved dust removal effect simultaneously, kills two birds with one stone.

In order to facilitate the formation of the water curtain, the filter plate 31 is disposed obliquely, and the right filter surface faces obliquely upward.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (8)

1. The utility model provides a soil thermal desorption integrated device which characterized in that includes:

the thermal desorption box (1) is used for carrying out thermal treatment on pretreated soil, a feeding hopper (12) is arranged at an inlet end of the upper end of the thermal desorption box (1), a plurality of shunt tubes (13) are arranged at the lower end of the feeding hopper (12), a heating pipe (14) for heating is arranged inside the thermal desorption box (1) below the shunt tubes (13), hot oil is filled inside the heating pipe (14), a conveying belt (16) for bearing the soil is arranged at the bottom inside the thermal desorption box (1), a driving motor (15) is arranged at the input end of the conveying belt (16), and a material guide channel (17) for discharging materials is arranged at the right end of the conveying belt (16);

the soil cooling box (2) is used for cooling soil and is connected with the discharge end of the thermal desorption box (1) through a material guide channel (17), a cooling guide frame (21) used for guiding the soil and facilitating soil heat dissipation is arranged inside the soil cooling box (2), the cooling guide frame (21) comprises a plurality of cross baffle plates (211), a cold water cavity is arranged inside each baffle plate (211), adjacent baffle plates (211) are communicated through a communication pipe (212), a water outlet end of the baffle plate (211) at the uppermost side is provided with a water outlet pipe (213), and a water inlet end of the baffle plate at the lowermost side is provided with a water inlet pipe (214);

the dust removal separation box (3) is used for removing dust in exhaust gas, the air inlet end of the dust removal separation box (3) is connected with an air pump (49) through an air extraction pipe (48), the air inlet end of the air pump (49) is connected with the air extraction end of the thermal desorption box (1), and a filter screen plate (31) for filtering the exhaust gas is arranged in the dust removal separation box (3);

a thermal power reflux box (4) used for absorbing the heat in the exhaust gas and sending the heat back to the thermal desorption box (1), the air inlet end of the heating power reflux box (4) is connected with the air outlet end of the dust-removing separation box (3) through a communicating pipe, an evaporator (41) for absorbing exhaust heat is arranged on the thermal power reflux box (4), the refrigerant inlet and the refrigerant outlet of the evaporator (41) are correspondingly communicated with the refrigerant inlet and the refrigerant outlet of the pressure and expansion hot box (44) through refrigerant pipes (42), a compressor (45) for compressing the refrigerant is arranged on the refrigerant pipe (42) on the left side, an expansion valve (43) is arranged on the refrigerant pipe (42) on the right side, a preheating oil tank is arranged in the pressure-scaling hot box, the preheating oil tank and a heating pipe (14) in the heat desorption box (1) form a circulation loop, an oil pipe connected with the oil inlet end of the heating pipe (14) is provided with a circulating liquid pump (46) and a hot-patch box (47) for heating oil;

comprises a tail gas treatment box (5) communicated with the exhaust end of the thermal reflux box (4).

2. The soil thermal desorption integrated device according to claim 1, wherein a washing pool (53) for treating exhaust gas is arranged at the inner bottom of the tail gas treatment box (5), a guide pipe (51) for introducing gas into the washing pool (53) is arranged at the gas inlet end of the tail gas treatment box (5), and an auxiliary exhaust pump (52) is arranged at the gas outlet end of the tail gas treatment box (5).

3. The integrated soil thermal desorption device according to claim 1, wherein the connection position of the suction pipe (48) is located at the right side of the thermal desorption box (1) between the heating pipe (14) and the conveyor belt (16).

4. The soil thermal desorption integrated device according to claim 1, wherein a water collecting tank is arranged at the bottom in the thermal reflux box (4), the water surface of the water collecting tank is in contact with the evaporator (41), so that the temperature of the water collecting tank can be reduced through the evaporator (41), a water supply pump is arranged in the water collecting tank, and the water outlet end of the water supply pump is connected with a water inlet pipe (214) on the cooling diversion frame (21) through a water guide pipe.

5. The soil thermal desorption integrated device according to claim 4, wherein the water outlet pipe (213) on the cooling diversion frame (21) is connected with the buffer tank (32) arranged at the top of the dust removal separation tank (3) through a water conduit, and the bottom of the buffer tank (32) is connected with the top of the dust removal separation tank (3) through a plurality of water leakage holes.

6. The soil thermal desorption integrated device according to claim 5, wherein a water pumping pipe is arranged on the right side of the dust removal separation box (3), the water pumping end of the water pumping pipe is located below the liquid level inside the dust removal separation box (3), the water pumping pipe is connected with a water pumping pump, and the water outlet end of the water pumping pump (33) is connected with the thermal reflux box (4).

7. The soil thermal desorption integrated device of claim 6, wherein the water pump (33) is internally provided with an activated carbon filter screen.

8. The soil thermal desorption integrated device according to claim 1, wherein the filter screen plate (31) is arranged obliquely, and the right side filter surface faces obliquely upwards.