CN215823916U

CN215823916U - In-situ thermal desorption restoration device for contaminated soil

Info

Publication number: CN215823916U
Application number: CN202121429648.2U
Authority: CN
Inventors: 周宇; 张宸; 张超; 王旭东; 张博; 曹立欣; 姚晓贝
Original assignee: Tianjin Ecology City Environmental Protection Co ltd
Current assignee: Tianjin Ecology City Environmental Protection Co ltd
Priority date: 2021-06-25
Filing date: 2021-06-25
Publication date: 2022-02-15
Anticipated expiration: 2031-06-25

Abstract

The utility model provides an in-situ thermal desorption remediation device for contaminated soil, which comprises a soil breaking pipe and a heating pipe, wherein a well cover is arranged at the upper end of the soil breaking pipe, the lower end of the soil breaking pipe is conical, the heating pipe is arranged in the soil breaking pipe, an inner cavity is arranged between the inner part of the soil breaking pipe and the periphery of the heating pipe, a heating cavity is arranged in the heating pipe, a vent hole is formed in the pipe wall of the soil breaking pipe, one end of a waste gas purification chamber is connected with an air suction pump, one end of the air suction pipe is connected to the air suction pump, the other end of the air suction pipe penetrates through the well cover and then is positioned in the inner cavity, and purified air in the waste gas purification chamber is communicated to the inner cavity through an air inlet pump. According to the device for in-situ thermal desorption remediation of the polluted soil, the high temperature of the waste gas is continuously used for heating the soil, the high temperature waste gas is recycled, the heating efficiency of the device is improved, and the energy consumption of the heating device is reduced.

Description

In-situ thermal desorption restoration device for contaminated soil

Technical Field

The utility model belongs to the technical field of soil remediation, and particularly relates to an in-situ thermal desorption remediation device for contaminated soil.

Background

The thermal desorption is a physical separation process for converting pollutants from one phase to another phase, the damage effect on organic pollutants does not appear in the restoration process, the thermal desorption device enables the organic pollutants, metal mercury and the like in the polluted soil to be heated and volatilized and separated from the organic pollutants through a direct or indirect heat exchange mode, the volatilized pollutants are effectively collected and processed, the polluted soil is heated to volatilize moisture, organic matters and partial metals, and the volatilized moisture and pollutants are sent into a waste gas processing system by virtue of an air flow or a vacuum system.

Disclosure of Invention

In view of this, the present invention is directed to provide an in-situ thermal desorption remediation device for contaminated soil, so as to solve the problem of low soil remediation efficiency of the in-situ thermal desorption device.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

the utility model provides a prosthetic device of normal position thermal desorption for polluting soil, including broken soil pipe and heating pipe, broken soil pipe upper end sets up the well lid, broken soil pipe lower extreme is the toper, the intraductal heating pipe that sets up that breaks soil, be equipped with the inner chamber between broken soil intraduct and the heating pipe periphery, the heating pipe is inside to be equipped with the heating chamber, be equipped with the air vent on the broken soil pipe wall, the aspiration pump is connected to exhaust gas purification room's one end, the one end of aspiration pipe is connected to the aspiration pump, the other end of aspiration pipe is located the inner chamber behind the well lid, the air-purifying in the exhaust gas purification room communicates to inside the inner chamber through admitting air the pump.

Furthermore, the one end fixed connection of pump admits air to the one end of heat pipe, the other end of heat pipe is located the inner chamber after passing well lid, heating chamber and heating pipe bottom pipe wall in proper order.

Further, the method is characterized by: the heating pipe is internally provided with a heating rod which is of a fold line structure, and the upper end of the heating rod penetrates through the well cover and extends to the ground.

Further, the heating rod is a resistance heating rod, a heat-resistant gasket is arranged at the upper end of the heating rod, and the heat-resistant gasket is a heat-resistant electrode.

Further, heat conducting media are filled in the heating cavity and the periphery of the heating rod.

Furthermore, the heat conducting medium is made of heat conducting oil.

Furthermore, a first through hole is formed in the bottom end of the heating pipe, the heat conduction pipe penetrates through the pipe wall of the bottom end of the heating pipe through the first through hole, and a sealing ring is arranged between the inside of the first through hole and the periphery of the heat conduction pipe.

Furthermore, the exhaust gas purification chamber is internally provided with a filter medium for filtering exhaust gas, and the filter medium is made of an active carbon filter screen.

Compared with the prior art, the device for in-situ thermal desorption remediation of the polluted soil has the following advantages:

(1) according to the device for in-situ thermal desorption remediation of the polluted soil, the inner cavity is arranged between the inside of the soil breaking pipe and the periphery of the heating pipe, the pipe wall of the soil breaking pipe is provided with the vent holes, the soil is indirectly heated through the heating rod in the heating pipe, the high-temperature waste gas sucked out by pyrolysis of the polluted soil is extracted by the air extracting pump, is purified by the waste gas purifying chamber, and is conveyed into the inner cavity again through the air inlet pump and the heat conducting pipe, the high temperature of the purified air is continuously used for heating the soil, the high-temperature waste gas is recycled, the heating efficiency of the device is improved, and the energy consumption of the heating device is reduced.

(2) According to the device for in-situ thermal desorption remediation of the polluted soil, the heating cavity is filled with heat conduction oil, so that the heat conductivity of the device is increased.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is a schematic view of an apparatus for in-situ thermal desorption remediation of contaminated soil according to an embodiment of the present invention;

fig. 2 is a bottom view of a heating pipe of the device for in-situ thermal desorption remediation of contaminated soil according to the embodiment of the utility model.

Description of reference numerals:

1-breaking soil pipe; 11-lumen; 12-a vent hole; 2-heating a tube; 21-heating chamber; 22-conduction oil; 23-a first via hole; 3-well cover; 31-a second via; 4-a waste gas purification chamber; 41-an air pump; 411-an exhaust tube; 42-an air intake pump; 421-a heat conducting pipe; 5-heating rod; 51-heat resistant gasket; 6-active carbon filter screen; 7-temperature monitor; 8-sealing ring.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1 and 2: the device for in-situ thermal desorption remediation of the polluted soil comprises a soil breaking pipe 1 and a heating pipe 2, wherein the upper end of the soil breaking pipe 1 is detachably connected with a well cover 3, and the well cover 3 is provided with a second through hole 31 allowing a pipeline to pass through and can allow an exhaust pipe 411 and a heat conduction pipe 421 to pass through;

the lower end of the soil breaking pipe 1 is conical, the soil breaking pipe 1 can easily enter deep soil, the heating pipe 2 is arranged inside the soil breaking pipe 1, an inner cavity 11 is arranged between the inside of the soil breaking pipe 1 and the periphery of the heating pipe 2, a heating cavity 21 is arranged inside the heating pipe 2, a heating rod 5 is arranged in the heating cavity 21, the heating rod 5 is of a zigzag structure, heating efficiency is improved, the heating rod 5 extends to the ground through a second through hole 31, a heat-resistant gasket 51 is arranged at the upper end of the heating rod 5, a temperature monitor 7 is arranged in the inner cavity 11 and used for monitoring the temperature in the inner cavity 11 so as to adjust the temperature of the heating rod 5 and reduce energy consumption, heat conducting oil 22 and heat conducting oil 22 are filled in the heating cavity 21 and the periphery of the heating rod 5, and the heat conducting oil 22 is an ideal heat carrier within the temperature range of 200-400 ℃;

the pipe wall of the soil breaking pipe 1 is provided with a vent hole 12, a waste gas purification chamber 4 is arranged on the ground, one end of the waste gas purification chamber 4 is connected with an air pump 41, one end of an air pump 411 is connected to the air pump 41, the other end of the air pump 411 is positioned in an inner cavity 11, the inner part of the inner cavity 11 is communicated to the waste gas purification chamber 4 through the air pump 411 and the air pump 41 in sequence, the waste gas purification chamber 4 is an in-situ thermal desorption repair tail gas purification chamber in the prior art, an air inlet of the waste gas purification chamber 4 is communicated with the air pump 41, an air outlet of the waste gas purification chamber 4 is communicated with an air inlet pump 42, one end of the air inlet pump 42 is connected to one end of a heat conduction pipe 421, the other end of the heat conduction pipe 421 sequentially penetrates through a first through hole 31 on the well cover 3 and a second through hole 23 at the bottom end of the heating pipe 2 and then is positioned in the inner cavity 11, and a sealing ring 8 is connected between the inner part of the second through hole 23 and the periphery of the heat conduction pipe 421, so as to prevent the heat conduction oil 22 from leaking; the waste gas purification chamber 4 is detachably connected with an active carbon filter screen 6 to purify the extracted polluted gas.

The working principle of the device for in-situ thermal desorption remediation of contaminated soil is as follows:

the soil breaking pipe 1 is driven into the polluted soil, then the heating rod 5 is heated, heat is transferred through the heat conduction oil 22 and passes through the inner cavity 11 to be transferred to the pipe wall of the soil breaking pipe 1, thereby indirectly heating the soil, volatile pollutants in the soil are heated and volatilized, the volatilized pollutant gas enters the inner cavity 11 through the vent hole 12, the air suction pump 41 is started, the pollutant gas is sucked into the exhaust gas purification chamber 4 through the air suction pipe 411 of which the end surface is positioned in the inner cavity 11 by the air suction pump 41, the pollutant gas enters the exhaust gas purification chamber 4 and is purified through the activated carbon filter screen 6 arranged in the exhaust gas purification chamber 4, the air inlet pump 42 is started, the purified high-temperature gas is sucked into the heat conduction pipe 421 through the air inlet pump 42, the high-temperature gas passes through the heat conduction pipe 421 and passes through the heating cavity 21 and enters the inner cavity 11 to continue heating the soil, and during heating, a user can monitor the temperature in the inner cavity 11 through the temperature monitor 7, thereby adjusting the temperature according to the situation.

Example 1: the heating rod 5 is a resistance heating rod, the heat-resistant gasket 51 is a heat-resistant electrode, when heating is required, a circuit is connected to the heat-resistant electrode, the heating rod 5 is heated by current, and the magnitude of the current is adjusted according to the feedback of the temperature monitor 7.

Example 2: the heating rod 5 is hollow inside, when heating is needed, the heating rod 5 is communicated to the combustion heater, the combustion heater enters the heating rod 5 through heat generated by combustion, the connection part of the heating rod and the combustion heater is sealed by the heat-resistant gasket 51, and the temperature is adjusted by increasing or reducing the feeding amount of the feeding port of the combustion heater according to the feedback of the temperature monitor 7.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A prosthetic device of normal position thermal desorption for polluting soil, its characterized in that: including broken native pipe (1) and heating pipe (2), broken native pipe (1) upper end sets up well lid (3), broken native pipe (1) lower extreme is the toper structure, set up heating pipe (2) in broken native pipe (1), be equipped with inner chamber (11) between broken native pipe (1) inside and heating pipe (2) periphery, heating pipe (2) inside is equipped with heating chamber (21), be equipped with air vent (12) on broken native pipe (1) pipe wall, aspiration pump (41) is connected to the one end of exhaust purification room (4), the one end of aspiration pipe (411) is connected to aspiration pump (41), the other end of aspiration pipe (411) passes behind the well lid and is located inner chamber (11), the air-purifying in exhaust purification room (4) communicates to inner chamber (11) inside through air intake pump (42).

2. The device for in situ thermal desorption remediation of contaminated soil according to claim 1, wherein: one end of the air inlet pump (42) is fixedly connected to one end of the heat conducting pipe (421), and the other end of the heat conducting pipe (421) sequentially penetrates through the well cover (3), the heating cavity (21) and the pipe wall at the bottom end of the heating pipe (2) and then is located in the inner cavity (11).

3. The device for in situ thermal desorption remediation of contaminated soil according to claim 1, wherein: heating rod (5) is arranged in heating pipe (2), heating rod (5) are fold line structure, and heating rod (5) upper end passes well lid (3) and extends to ground.

4. The device for in situ thermal desorption remediation of contaminated soil according to claim 1, wherein: the heating rod (5) is a resistance heating rod, a heat-resistant gasket (51) is arranged at the upper end of the heating rod (5), and the heat-resistant gasket (51) is a heat-resistant electrode.

5. The device for in situ thermal desorption remediation of contaminated soil according to claim 3, wherein: heat-conducting media are filled in the heating cavity (21) and the periphery of the heating rod (5).

6. The device for in situ thermal desorption remediation of contaminated soil according to claim 5, wherein: the heat conducting medium is made of heat conducting oil (22).

7. The device for in situ thermal desorption remediation of contaminated soil according to claim 2, wherein: the bottom end of the heating pipe (2) is provided with a first through hole (23), the heat conducting pipe (421) penetrates through the pipe wall at the bottom end of the heating pipe (2) through the first through hole (23), and a sealing ring (8) is arranged between the interior of the first through hole (23) and the periphery of the heat conducting pipe (421).

8. The device for in situ thermal desorption remediation of contaminated soil according to claim 1, wherein: and a filtering medium for filtering waste gas is arranged in the waste gas purification chamber (5), and the material of the filtering medium is an active carbon filter screen (6).