CN210788581U

CN210788581U - Contaminated soil heating repair system

Info

Publication number: CN210788581U
Application number: CN201921486259.6U
Authority: CN
Inventors: 诸毅; 张汝壮; 张晓艺; 刘菁菁; 李影辉; 方兴斌; 徐日
Original assignee: Shanghai Environmental Green Ecological Restoration Technology Co ltd
Current assignee: Shanghai Chengtou Shangjing Ecological Restoration Technology Co.,Ltd.
Priority date: 2019-09-09
Filing date: 2019-09-09
Publication date: 2020-06-19
Anticipated expiration: 2029-09-09

Abstract

The utility model relates to a pollute soil heating repair system, this system is including being used for placing the heating blanket in the soil body, lay the pipeline that is used for extracting soil body volatility pollution tail gas under the heating blanket, the pipeline communicates to extraction fan and tail gas treatment clarification plant. The beneficial effects of the utility model are that energy utilization is high in its soil heating prosthetic heating, and the repair cost is low, and operation, dismantlement, equipment are convenient, but the modularization equipment.

Description

Contaminated soil heating repair system

Technical Field

The utility model relates to a segmentation field-soil remediation of environmental protection specifically is a pollute soil heating repair system.

Background

At present, a large number of industrial and mining enterprises are shut down or moved in many large and medium-sized cities in China for adjusting industrial structures and improving urban environments, so that a large number of polluted sites are generated. The most common organic pollution sites not only seriously threaten human health and surrounding environment, but also have great influence on land circulation.

The organic polluted soil is usually repaired by adopting the processes of advanced oxidation, thermal desorption, normal-temperature desorption and the like. More and more cases of the thermal desorption technology are applied to the organic contaminated soil at present. Compared with other restoration technologies, the thermal desorption technology has better restoration effect on the high-concentration organic polluted soil.

However, the traditional ex-situ thermal desorption technology has the problems of long construction period, high cost and the like in the polluted soil remediation process. In practical engineering application, a flexible and efficient integrated thermal desorption technology and device system are urgently needed for solving the problems caused by the construction period and the heating efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the not enough of prior art, solve the problem that heating efficiency is low in the contaminated soil restoration.

In order to achieve the purpose, the invention provides a contaminated soil heating and repairing system which comprises a heating blanket arranged in soil, wherein a pipeline for extracting volatile contaminated tail gas of the soil is arranged below the heating blanket, and the pipeline is communicated to an extraction fan and tail gas treatment and purification equipment.

The soil volatile pollution tail gas disclosed herein refers to a pollutant volatilized from a pollutant in the polluted soil after being heated, and the tail gas enters a tail gas treatment and purification device through a pipeline, such as activated carbon, an alkaline solution for purifying a corresponding pollution medium, an acidic solution for purifying a corresponding pollution medium, and the like.

The pipeline disclosed by the invention can be used for collecting the tail gas, and holes can be generally formed in the pipe wall of the pipeline so as to improve the efficiency of collecting and laying the tail gas of the pipeline. The extraction fan provides negative pressure in the pipeline so as to convey the medium in the pipeline to the tail gas treatment and purification equipment.

Preferably, the electric heating wires contained in the heating blanket are uniformly distributed on the surface of the heating blanket, and the electric heating wires are also provided with a temperature control device.

The temperature control device disclosed herein may be a current control device of an electric heating wire, an overheating fusing device or other control devices of a cooling and auxiliary heating device, so as to realize the temperature control of the heating blanket.

Preferably, the heating blankets are arranged in a stacked manner, and the interval between every two adjacent heating blankets is 1-3 m.

Adjacent, as disclosed herein, means that the nearest upper and lower layers of the blanket are stacked when the blanket is arranged in a multi-layer configuration.

Preferably, the soil body thermal insulation blanket further comprises a thermal insulation blanket used for wrapping the soil body.

The wrapping of the soil body disclosed herein means that the heat-insulating blanket is attached to the outside of the soil body, and the heat-insulating blanket can be laid on the upper part, the lower part, the left part and the right part of the soil body pile respectively.

Preferably, the temperature sensor is used for being placed in the soil body and realizing the temperature measurement of the soil body.

The temperature sensor disclosed herein is used for transmitting the temperature information in the soil to the outside, so as to facilitate the adjustment of the heating blanket or pipeline and other devices by the user.

The heating blanket, the pipeline, the extraction fan and the tail gas treatment and purification equipment are mutually matched to construct a contaminated soil heating and repairing system, and an overall process treatment solution scheme for removing and collecting contaminants is provided for ex-situ soil thermal repair.

The pipeline arranged under the heating blanket is convenient for the integral matching installation of the heating blanket and the pipeline.

The electric heating wires are good in heating efficiency and convenient to arrange, balance of heating parts in the heating blanket is facilitated, and heating temperature can be controlled through a common temperature control device.

Under the structure that a plurality of heating blankets are stacked, the temperatures of upper and lower areas in the soil body can be respectively adjusted by controlling the heating blankets, and the situation that the heating in the soil body cannot be achieved can be avoided.

The arrangement of the heat preservation blanket is used for ensuring the heat preservation and temperature rising effects of the soil body and reducing the energy loss.

The temperature sensor can monitor the over-low or over-high temperature of the soil body, and meanwhile, a basis can be provided for adjustment of the heating blanket.

The utility model discloses the beneficial effect of equipment is that the energy utilization in its soil heating prosthetic heating is high, and the repair cost is low, and operation, dismantlement, equipment are convenient, but the modularization equipment.

Drawings

FIG. 1 is a schematic view of the whole contaminated soil heating remediation system of the present invention;

FIG. 2 is a partial schematic view of a cross section of a soil pile in the contaminated soil heating remediation system of the present invention;

wherein:

1-heating blanket 2-pipeline 3-extraction fan

4-tail gas treatment and purification equipment 5-electric heating wire 6-heat preservation blanket

7-temperature sensor

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

The contaminated soil heating and repairing system shown in fig. 1 to 2 comprises a heating blanket 1 placed in soil, wherein a pipeline 2 for extracting volatile contaminated tail gas of soil is arranged below the heating blanket 1, and the pipeline 2 is communicated to an extraction fan 3 and a tail gas treatment and purification device 4.

The electric heating wires 5 contained in the heating blanket 1 are uniformly arranged on the surface of the heating blanket, and the electric heating wires 5 are also provided with a temperature control device (not shown in the drawings, but the structure can be understood by those skilled in the art).

The heating blankets 1 are arranged in a stacked mode, and the interval between every two adjacent heating blankets 1 is 1-3 m.

The soil body wrapping thermal insulation blanket is characterized by further comprising a thermal insulation blanket 6 used for wrapping a soil body, and the thermal insulation blanket 6 can be made of thermal insulation cotton with the thickness of 2 cm.

And the device also comprises a temperature sensor 7 which is used for being placed in the soil body and realizing the temperature measurement of the soil body.

In more specific application, the organic pollution site is applied to some organic pollution sites, for example, the pollutant of a certain site is phenol which is a single semi-volatile organic pollutant, and the amount of the excavated polluted soil is about 900m³And (3) building a pile of the polluted soil on the heat-preservation blanket 6, wherein the volume of the pile is 15m x 10m x 6 m. The method comprises the steps of constructing a stack from bottom to top, continuously constructing the stack after arranging a heating blanket 1 at a position 1.5m away from the stack, arranging a second heating blanket 1 at a position 4.5m away from the stack, wherein the heating radiation range of the heating blanket 1 is 1.5m above and below the stack, and arranging a tail gas extraction pipeline 2 below the heating blanket 1 for extracting volatilized pollution gas. Nine temperature sensors 7 are uniformly installed inside the polluted soil pile body. The polluted soil pile body is continuously heated through the heating blanket 1, the temperature is gradually increased to 250 ℃, and sampling detection is carried out after heating is completed. The system is continuously operated for 10-15 days, and the concentration change of the pollutants in the soil before and after thermal remediation is contrastively analyzed. Through detection, the concentration of phenol in the soil can be reduced by 95%, which shows that the contaminated soil heating and repairing system has a good effect of removing organic pollutants in the soil, can be used for repairing the contaminated soil, and has the advantages of short repairing period, low repairing cost and simple operation.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the embodiments disclosed, and that various changes and modifications may be made, which are within the scope of the appended claims.

Claims

1. The contaminated soil heating and repairing system is characterized by comprising a heating blanket placed in soil, wherein a pipeline for extracting volatile contaminated tail gas of the soil is arranged below the heating blanket, and the pipeline is communicated to an extraction fan and tail gas treatment and purification equipment.

2. The contaminated soil heating remediation system of claim 1, wherein the electrical heating wires contained in the heating blanket are uniformly arranged on the surface of the heating blanket, and the electrical heating wires are further provided with a temperature control device.

3. The contaminated soil thermal remediation system of claim 1, wherein said heating blankets are arranged in a stack, with a spacing of 1-3m between adjacent heating blankets.

4. The contaminated soil thermal remediation system of claim 1 further comprising a thermal blanket for wrapping the soil mass.

5. The contaminated soil heating remediation system of claim 1 further comprising a temperature sensor for placement within the body of soil and enabling measurement of the temperature of the body of soil.