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Device for injecting high-temperature gas by using in-situ thermal desorption heating well

A high-temperature gas and gas generating device technology, which is applied in isolation devices, wellbore/well components, earthwork drilling and production, etc., can solve the problems of limited heating area, low efficiency, high cost, etc., achieve large spray radius, shorten project duration, Effect of reducing heating energy consumption and cost

Pending Publication Date: 2020-05-15
BEIJING ZHONGYAN DADI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the defects of low efficiency, limited heating area, low temperature and high cost in the prior art, the present invention provides a device for injecting high-temperature gas by using in-situ thermal desorption and additional heat well

Method used

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  • Device for injecting high-temperature gas by using in-situ thermal desorption heating well
  • Device for injecting high-temperature gas by using in-situ thermal desorption heating well
  • Device for injecting high-temperature gas by using in-situ thermal desorption heating well

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Embodiment 1

[0037] In this embodiment, a device for injecting high-temperature gas using in-situ thermal desorption and additional heating wells is used to heat the vadose zone formation, such as figure 1 As shown, it includes a heater well and a gas injection injection device 6, the heater well includes an outer heater well casing 7 and a heating element 5 penetrating through the inside of the heater well casing 7; the gas injection injection device 6 includes a gas injection Injection device casing 8, gas generating device 1 (air compressor 1 in this embodiment), gas delivery pipe 9, and gas injection pipe 11, the gas injection injection device casing 8 has three sequentially from top to bottom, and the height is 100 mm, evenly distributed and welded to the wall of the heater well casing 7, the gas injection pipe 11 is annular, with a ring diameter of 40 mm, and the inner diameter of the gas injection pipe is 8 mm, welded to the casing 8 of the gas injection injection device, And there ...

Embodiment 2

[0041] A device for injecting high-temperature gas using in-situ thermal desorption and additional heating wells in this embodiment is used to heat the aquifer. The difference from Embodiment 1 is that the gas generating device 1 uses a low-pressure steam boiler, and the low-pressure steam

[0042] The rated steam pressure of the boiler is 1.25~1.6 MPa, and the rated steam temperature is 190~210°C. The casing 8 of the gas injection injection device has 5 casings from top to bottom, with a height of 50 mm, which are uniformly distributed and welded to the wall of the heating well casing 7. The annular diameter of the gas injection pipe 11 is 100 mm. The inner diameter of the tube is 12.5 mm, and there are 12 outward injection holes 13 distributed symmetrically about the center of the air injection pipe 11 ring, the diameter of the gas delivery pipe 9 is 10 mm, and the nozzle diameter of the one-way pressure valve 12 is 5mm.

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Abstract

The invention discloses a device for injecting high-temperature gas by using an in-situ thermal desorption heating well. The device for injecting the high-temperature gas by using the in-situ thermaldesorption heating well comprises a heating well and a gas injection spraying device, wherein the heating well comprises an outside heating well casing pipe and a heating element penetrating the interior of the heating well casing pipe; the gas injection spraying device comprises a gas injection spraying device casing pipe, a gas generating device, a gas conveying pipe, and a gas spraying pipe; the gas spraying pipe is annularly fixed to the gas injection spraying device casing pipe; a plurality of outward spraying holes are formed in the gas spraying pipe; and the gas conveying pipe is located between the heating element and the heating well casing pipe and is connected to the gas generating device and the gas spraying pipe. The gas conveying pipe is connected to the gas generating deviceso as to convey the high-temperature gas to the spraying pipe; a unidirectional nozzle is used for spraying the high-temperature gas to a polluted formation at a high speed; and as the spraying radius is large, the range of the heating area and the heating efficiency can be increased, and the accurate heating is realized.

Description

technical field [0001] The invention belongs to the field of environment or environmental rock and soil, and specifically relates to a device for injecting high-temperature gas by using a heating well mainly for organic pollutants. Background technique [0002] During in situ thermal desorption of soil, heating wells are usually used to heat the surrounding area. The technical problems of existing heat conduction heating wells are as follows: [0003] (1) The heat conduction is slow and the efficiency is low; the heating effect of the area near the heating well is better, and the heating rate of the soil farther away is slower; the heating of complex hydrogeological formations cannot be precisely controlled. [0004] (2) The injection wells of the existing steam thermal desorption technology are mostly connected with steam boilers / air compressors, and the diameter of the sidewall openings of the injection wells is mostly 1-3 cm, which is relatively large. When high-temperat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B36/00
CPCE21B36/006
Inventor 宋德君于冬雪王路路王京蒋燚
Owner BEIJING ZHONGYAN DADI TECH CO LTD