CN-121988602-A - Self-ploughing system and method for microbial treatment of petroleum-polluted soil

CN121988602ACN 121988602 ACN121988602 ACN 121988602ACN-121988602-A

Abstract

The present invention belongs to the field of environmental protection equipment for oil and gas fields, and relates to a self plowing system and method for treating microorganisms in oil contaminated soil. It is suitable for using composting technology to treat microorganisms in oil contaminated soil. During the process of excavating compost in oil contaminated soil, the plowing rubber bag is pre embedded in the pile body, and the gradual expansion of the plowing rubber bag is used to push the soil above to move, achieving automatic plowing during the treatment process, increasing the oxygen content in the soil, improving the growth and reproduction environment of microorganisms, and accelerating the biodegradation process of petroleum hydrocarbons.

Inventors

TONG XIAO
LIU NING
LI YAN
SUN BO
HE ZHANYOU
XU WENLONG
XU ZIQIANG
JIANG JIHUI
REN PENG
ZHAO MIN

Assignees

中国石油天然气集团有限公司

Dates

Publication Date: 20260508
Application Date: 20241107

Claims (8)

1. A system for automatically ploughing the microbial treatment of petroleum contaminated soil, suitable for repairing a pile (20) of petroleum contaminated soil microorganisms, for supplementing the oxygen content in the pile and automatically ploughing the soil, characterized by comprising: A first high pressure gas storage tank (10); The tillage rubber air bag (50) is embedded in the petroleum polluted soil microorganism restoration pile body (20), and the first high-pressure gas storage tank (10) is communicated with the tillage rubber air bag (50) through a first gas transmission pipeline (61); A mechanical switching device (30) mounted on said first gas transmission duct (61); And the gas flow rate control device (40) is connected into the mechanical switching device (30) through a second gas transmission pipeline (62) so that the gas flow rate control device (40) controls the mechanical switching device (30) to be opened and closed.
2. The self-ploughing system for the microbiological treatment of petroleum contaminated soil according to claim 1, characterized in that said gas flow rate control means (40) comprise a second high-pressure gas storage tank (41), the tank mouth of said second high-pressure gas storage tank (41) being hermetically connected to one end mouth of said second gas transmission duct (62), the other end mouth of said second gas transmission duct (62) being hermetically connected to said mechanical switching means (30); The gas flow rate control device (40) further comprises a pressure reducing valve (42) and a control rubber air bag (43) which are arranged on the second gas transmission pipeline (62), wherein the control rubber air bag (43) is adjacent to the mechanical switching device (30) so as to control the opening or closing of the control rubber air bag.
3. The oil contaminated soil microbiological treatment self-ploughing system of claim 2, wherein said mechanical switching device (30) comprises: A first housing (31) provided with a mechanical flat plate (311) inside, wherein the mechanical flat plate (311) divides an inner chamber of the first housing (31) into an upper chamber and a lower chamber, the lower chamber is used for receiving incoming air from the control rubber air bag (43), and the upper chamber is provided with a spring (312); -a second housing (32), an inlet of the second housing (32) being adapted to receive incoming gas from the first high pressure gas storage tank (10), an outlet of the second housing (32) being adapted to deliver gas from the first high pressure gas storage tank (10); Baffle (33), vertically run through behind second casing (32) insert perpendicularly in first casing (31) and be fixed in machinery flat board (311), baffle (33) divide into airtight plate portion (331) and fretwork board portion (332), when the coming gas of control rubber gasbag (43) promotes machinery flat board (311) motion, airtight plate portion (331) separation first high-pressure gas storage tank (10) comes into turn over plough rubber gasbag (50) so that mechanical switching device (30) are in the closed state, perhaps first high-pressure gas storage tank (10) comes into through fretwork board portion (332) turn over plough rubber gasbag (50) so that mechanical switching device (30) are in the open state.
4. The oil contaminated soil microbiological treatment self-ploughing system according to claim 2, characterized in that the high pressure gas of the first high pressure gas storage tank (10) and the second high pressure gas storage tank (41) refers to inert gas or other non-toxic harmless gas maintained at a pressure of at least 1 MPa.
5. The oil contaminated soil microbiological treatment self-ploughing system of claim 2, characterized in that said pressure reducing valve (42) is adapted to control the release rate of high pressure gas from said second high pressure gas storage tank (41) so that said high pressure gas enters said control rubber bladder (43) at a fixed flow rate.
6. The self-ploughing system for the microbiological treatment of petroleum contaminated soil according to claim 1, characterized in that said ploughing rubber bladder (50) is embedded in the bottom of said petroleum contaminated soil microbiological restoration stack (20); Other components except the ploughing rubber air bag (50) and part of the first air conveying pipeline (61) are arranged outside the petroleum polluted soil microorganism repairing pile body (20).
7. A method for microbial treatment of petroleum contaminated soil self-ploughing, suitable for the microbial treatment of petroleum contaminated soil self-ploughing system according to any one of claims 2 to 6, characterized in that it comprises at least a self-ploughing process: Opening the pressure reducing valve (42), and enabling high-pressure gas of the second high-pressure gas storage tank (41) to flow into the control rubber air bag (43), wherein the control rubber air bag (43) is gradually expanded until the mechanical switching device (30) is triggered to be opened; The high-pressure gas in the first high-pressure gas storage tank (10) flows through the mechanical switch device (30) to enter the ploughing rubber air bag (50), the ploughing rubber air bag (50) rapidly expands to push the soil above to displace, and the oxygen content in the petroleum polluted soil microorganism restoration pile body (20) is increased to realize ploughing.
8. The method for microbial treatment of petroleum contaminated soil according to claim 7, further comprising repeating the plowing process: removing all parts outside the petroleum polluted soil microorganism restoration pile body (20) to enable the control rubber air bag (43) and the ploughing rubber air bag (50) to be deflated and contracted to restore to the original state; Reassembling the petroleum polluted soil microorganism treatment self-ploughing system; the self-turning process of claim 7 is repeated.

Description

Self-ploughing system and method for microbial treatment of petroleum-polluted soil Technical Field The invention belongs to the field of oil and gas field environmental protection equipment, and particularly relates to a self-turning system and method for microbial treatment of petroleum polluted soil. Background The main goal of petroleum-contaminated soil remediation is to remove or reduce petroleum pollutants in the soil by various methods to restore the natural state and function of the soil. At present, the petroleum polluted soil repairing method mainly comprises three major categories of physical repairing, chemical repairing and biological repairing: (1) Physical remediation typically involves techniques such as soil washing, thermal desorption, and the like. These methods, while effective in some cases, tend to be costly and can cause significant interference with soil structures and ecosystems. (2) Chemical repair methods include chemical oxidation, stabilization/curing, and the like. The method can effectively degrade or fix pollutants, but the use of chemical reagents can cause secondary pollution problems, and high treatment cost exists. (3) The bioremediation technology is a soil remediation method which utilizes the natural metabolic capability of microorganisms to degrade petroleum pollutants and is environment-friendly and relatively low in cost. The core of the method is the ability to decompose contaminants by increasing the number of microorganisms in the soil that are able to decompose petroleum hydrocarbons, or by improving the soil environment to promote the decomposition of contaminants by the indigenous microorganisms. However, bioremediation methods present challenges in practical applications, one of which is the problem of oxygen supply in the soil. The biodegradation of petroleum hydrocarbons is a process that requires large amounts of oxygen to participate. Under natural conditions, in particular in areas contaminated by a large amount of petroleum, anaerobic environments are easily formed due to limited diffusion of oxygen, which greatly limits the activity of aerobic microorganisms, thereby affecting the degradation efficiency of petroleum hydrocarbons. In order to solve the bioremediation problem, mechanical tillage is often adopted in the traditional method to increase the air permeability of soil, a mechanical device for achieving soil tillage by means of rotation of a coulter is designed as an acid soil remediation device provided by CN117223423B, CN116491249B provides a soil deep tillage medicine injection device and method based on vegetation soil remediation, soil is subjected to rotary tillage in the rotation process by designing a plurality of groups of rotary blades to achieve soil deep tillage, and CN114951244B provides a heavy metal polluted farmland soil remediation device which drives the tillage blades to reciprocate in an arc track to perform tillage work on the soil. However, this method is labor intensive and requires manual operation. Disclosure of Invention The invention aims to provide a microorganism treatment self-ploughing system and method for petroleum polluted soil, so as to overcome the technical defects. In order to solve the technical problems, the invention provides a self-ploughing system for microorganism treatment of petroleum-polluted soil, which is suitable for repairing a pile body by microorganism of petroleum-polluted soil so as to supplement oxygen content in the pile body and automatically ploughing soil, and comprises the following components: a first high pressure gas storage tank; The tillage rubber air bag is embedded in the petroleum polluted soil microorganism restoration pile body, and the first high-pressure gas storage tank is communicated with the tillage rubber air bag through a first gas pipeline; a mechanical switching device mounted on the first gas transmission pipeline; and the gas flow rate control device is connected into the mechanical switching device through a second gas transmission pipeline, so that the gas flow rate control device controls the mechanical switching device to be turned on and turned off. According to the self-ploughing system for the microbial treatment of the petroleum polluted soil, the gas flow rate control device comprises a second high-pressure gas storage tank, wherein the tank opening of the second high-pressure gas storage tank is communicated with one end pipe opening of the second gas pipeline in a sealing manner, and the other end pipe opening of the second gas pipeline is connected with the mechanical switch device in a sealing manner; the gas flow rate control device further comprises a pressure reducing valve and a control rubber air bag which are arranged on the second gas pipeline, wherein the control rubber air bag is adjacent to the mechanical switch device to control the opening or closing of the control rubber air bag. A petroleum contaminated soil microbiological treatment se