CN215032301U - High-pressure rotary spraying-in-situ chemical oxidation restoration orifice waste gas collecting and treating system - Google Patents
High-pressure rotary spraying-in-situ chemical oxidation restoration orifice waste gas collecting and treating system Download PDFInfo
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- CN215032301U CN215032301U CN202120739221.6U CN202120739221U CN215032301U CN 215032301 U CN215032301 U CN 215032301U CN 202120739221 U CN202120739221 U CN 202120739221U CN 215032301 U CN215032301 U CN 215032301U
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Abstract
The utility model provides a loss waste gas collection and processing system that is used for polluting place high pressure jet grouting-normal position chemical oxidation to restore medicament injection process belongs to the pollution place and restores secondary pollution prevention and control field. The utility model discloses a high pressure spouts soon-normal position oxidation repair technology system's auxiliary unit builds one set of portable waste gas through spouting the injection point drill way soon at normal position chemical oxidation high pressure and collects and processing system, and the effusion waste gas is collected and is dealt with through the active carbon adsorption unit through the gas collecting channel, can effectively control organic pollution place and restore medicament normal position injection process organic waste gas by high pressure jet point position (drilling) to atmospheric loss around. The utility model provides a be used for normal position chemical oxidation high pressure jet implementation process organic waste gas prevention and control system is showing at organic pollution place (like the pesticide class) application effect, especially to the environmental sensitivity district pollution soil at city center and groundwater repair engineering's secondary pollution prevention and cure and solve repair process's peculiar smell disturbing people problem and have the positive effect.
Description
Technical Field
The utility model relates to a high pressure spouts soon-normal position chemical oxidation restores drill way waste gas and collects and processing system belongs to the field of polluting the restoration secondary pollution prevention and control field, concretely relates to organic waste gas's collection and processing system technical field.
Background
In recent years, the urbanization process of China is accelerated continuously, polluted sites left by relocation of industrial sites in the original city range are required to be developed and reused, and in order to guarantee land safety of plots, the polluted sites need to be restored and developed according to land properties according to relevant national regulations. The number of polluted sites in China is large, the types of the sites are wide, and the types of the polluted sites comprise petroleum refining, coking, chemical manufacturing, medicines, metal smelting, processing and the like. The investigation result of the polluted site indicates that the types of pollutants are more Volatile (VOCs) and semi-volatile organic pollutants (SVOCs), mainly comprise organic chlorine solvents, petroleum pollutants, organic chlorine pesticides, polychlorinated biphenyl, polycyclic aromatic hydrocarbons and the like, and the remediation process of the site easily causes the dissipation of organic gases and peculiar smell.
The existing common repairing methods for the polluted site comprise in-situ repairing and ex-situ repairing, and the in-situ repairing technology is more and more prone to be adopted for repairing soil and underground water of the organic matter polluted site which is large in pollution depth and difficult to excavate. At present, the commonly used in-situ remediation techniques for contaminated sites include vapor extraction, in-situ thermal desorption, in-situ bioremediation, in-situ chemical oxidation and the like. The in-situ chemical oxidation repair technology has the advantages of high removal efficiency, short repair period, easiness in control of secondary pollution and the like, can treat various pollutants, is generally not limited by the concentration of pollutants, and has attracted great attention in the repair industry in recent years.
The high-pressure jet grouting injection method is one of main medicament adding modes of in-situ chemical oxidation, and has the advantages of wide applicable soil layer range (a high-permeability sand layer is expanded to a low-medium permeability stratum), high injection pressure, large diffusion radius, particularly obvious water-bearing layer effect, lower mechanical cost, large repair depth (up to 20-25 m), high construction efficiency, strong controllability of fixed-depth injection and precision and the like compared with other in-situ chemical oxidation injection modes such as an injection well, Geoprobe hydraulic fracturing, deep stirring and the like. The method is mainly characterized in that a grouting pipe (drill rod) with a special nozzle enters a preset depth of a soil layer through a drill hole, then a prepared medicament is sprayed out from the nozzle, the grouting pipe with the nozzle is lifted upwards while being sprayed, and high-pressure liquid flow cuts and stirs a soil body, so that an oxidation medicament is fully mixed with polluted soil and underground water, pollutants are decomposed by oxidation, and health risks are eliminated. However, in the organic pollution site adopting the high-pressure jet grouting injection method, slurry return and waste gas carrying phenomena caused by the jetting of compressed air exist in the orifice of the disturbance jet grouting point for injecting compressed air and medicaments, and particularly, the dissipation of organic gas and peculiar smell is serious in the medicament injection process of the pesticide pollution site.
Chinese patent No. CN205762952U (granted publication date: 2016.12.07) discloses a high-pressure rotary jet injection repair system for in-situ chemical oxidation of soil and underground water. The system comprises a dispensing station unit and a repairing medicament solution high-pressure injection and compressed air injection unit, can be used for high-pressure rotary spraying in-situ injection point (drilling) construction, and has the advantages of wide application range of stratum, large repairing depth, fixed depth repairing, optimized medicament injection amount, single-hole continuous injection operation, high construction efficiency and lower mechanical cost of a sand layer. But lacking in a waste gas collection and disposal device, the spinning process has resulted in odor emission and organic gas emission.
Chinese patent application publication No. CN110653250A (application publication No. 2020.01.07) discloses an in-situ high-pressure jet injection repairing device for an organic pollution site, which can monitor the concentration of organic pollutants in soil in real time through a volatile organic gas (PID) detector, improve in-situ repairing efficiency, accurately control the dosage and prevent secondary pollution caused by insufficient medicament or excessive medicament. But the device also lacks an exhaust gas collection and disposal device.
Chinese patent application publication No. CN110802109A (application publication No. 2020.02.18) discloses a local ex-situ remediation system and method for a pungent odor site, which adopts a mode of injecting and stirring an in-situ medicament, generates great disturbance on the site, easily volatilizes odor substances into the surrounding air, and cannot effectively collect and remove the volatile odor substances.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problems existing in the prior art and further providing a high-pressure jet-in-situ chemical oxidation restoration orifice waste gas collecting and treating system.
The utility model aims at realizing through the following technical scheme:
a high pressure jet-in situ chemical oxidation remediation orifice waste gas collection and treatment system, comprising: the device comprises a gas collecting hood, an annular gasket, a connecting flange, a gas collecting air pipe, a differential pressure gauge, a drawer type activated carbon absorber, a fan, a chimney pipeline, a chimney top cover and a device support, wherein a high-pressure rotary jet grouting drill rod is vertically inserted in the middle of the gas collecting hood, the annular gasket is arranged between the high-pressure rotary jet grouting drill rod and the gas collecting hood, one end of the gas collecting air pipe is communicated with the inlet end of the drawer type activated carbon absorber, the other end of the gas collecting air pipe is communicated with the gas collecting hood through the connecting flange, the outlet end of the drawer type activated carbon absorber is communicated with the inlet end of the fan through the other connecting flange, the lower end of the chimney pipeline is communicated with the outlet end of the fan, the chimney top cover is installed at the upper end of the chimney pipeline, the fan 7 is installed on the device support, a liquid jet nozzle is arranged at the lower part of the high-pressure rotary jet grouting drill rod, and a drill bit is installed at the bottom end of the high-pressure rotary jet grouting drill rod, the working surface of the drill bit is provided with a hard alloy block, the inlet end of the drawer type activated carbon absorber is provided with a differential pressure gauge, and the outlet end of the drawer type activated carbon absorber is provided with another differential pressure gauge. In the in-situ chemical oxidation repairing agent injection process, simultaneous injection and drilling of the agent and air are realized through the high-pressure jet grouting drill rod, the liquid flow jet nozzle, the drill bit and the hard alloy block, and the generated organic waste gas returns to the orifice and is collected and treated through the system.
The beneficial effects of the utility model
The utility model discloses the application effect is showing. The odor and organic gas emission caused by the disturbance of the high-pressure rotary spraying process to the polluted soil and the underground water can be effectively controlled, and the odor and the raised dust in the field can be prevented from being diffused to the outside of the field. The method has positive effects on preventing and treating secondary pollution of polluted soil and underground water restoration engineering in an environment sensitive area of a city center and solving the problem of disturbing residents by peculiar smell in the restoration process.
The gas collecting channel adopts a combined structure and is connected and fixed by the lock catch, and the circular hole at the top of the gas collecting channel is provided with the annular gasket, so that the whole equipment is convenient and quick to install, the diameter of the high-pressure rotary spraying drill rod can be adjusted in time according to different diameters, and the overall tightness of the equipment can be strictly controlled.
The active carbon adsorption unit adopts the stuffing box structure of multilayer drawer type, with the adsorption space classification to pressure difference control adsorption effect through each interval setting reaches real-time feedback, and the drawer that will pack that can be swift is taken out the change, has avoided traditional integral adsorption equipment to change, the extravagant problem of packing. Simultaneously, a plurality of filler drawers are orderly adjusted the position in proper order, have effectively utilized the absorption filler in the drawer, have avoided the absorption of filler uneven and extravagant, effectively improve the inside atmospheric pressure difference of adsorption equipment moreover, promote the adsorption effect, have further improved absorption efficiency.
Drawings
FIG. 1 is a schematic view of the whole structure of the system for collecting and treating waste gas from the orifice of high-pressure rotary spraying-in-situ chemical oxidation of soil and groundwater according to the present invention.
Fig. 2 is a top view of fig. 1.
Fig. 3 is a schematic structural diagram of the gas collecting hood.
Description of reference numerals: the device comprises a gas collecting hood 1, an annular gasket 2, a connecting flange 3, a gas collecting air pipe 4, a differential pressure gauge 5, a drawer type activated carbon absorber 6, a fan 7, a chimney pipeline 8, a chimney top cover 9, an equipment support 10, a high-pressure rotary jet grouting drill rod (triple pipe) 11, a liquid flow jet nozzle 12, an air jet air flow 13, a drill bit 14, a hard alloy block 15 and a lock catch 16.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings: the present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation is given, but the scope of the present invention is not limited to the following embodiments.
As shown in fig. 1 to fig. 3, the system for collecting and treating exhaust gas from a high-pressure jet grouting in-situ chemical oxidation repairing orifice according to the present embodiment includes: the device comprises a gas collecting hood 1, an annular gasket 2, a connecting flange 3, a gas collecting air pipe 4, a differential pressure gauge 5, a drawer type activated carbon absorber 6, a fan 7, a chimney pipeline 8, a chimney top cover 9 and an equipment support 10, wherein a high-pressure rotary jet grouting drill pipe 11 vertically penetrates through the middle position of the gas collecting hood 1, the annular gasket 2 is arranged between the high-pressure rotary jet grouting drill pipe 11 and the gas collecting hood 1, one end of the gas collecting air pipe 4 is communicated with the inlet end of the drawer type activated carbon absorber 6, the other end of the gas collecting air pipe 4 is communicated with the gas collecting hood 1 through one connecting flange 3, the outlet end of the drawer type activated carbon absorber 6 is communicated with the inlet end of the fan 7 through the other connecting flange 3, the lower end of the chimney pipeline 8 is communicated with the outlet end of the fan 7, the upper end of the chimney pipeline 8 is provided with the chimney top cover 9, the fan 7 is arranged on the equipment support 10, the lower part of the high-pressure rotary jet grouting drill pipe 11 is provided with a liquid jet nozzle 12, the bottom end of the high-pressure rotary jet grouting drill rod 11 is provided with a drill bit 14, the working surface of the drill bit 14 is provided with a hard alloy block 15, the inlet end of the drawer type activated carbon absorber 6 is provided with one differential pressure gauge 5, and the outlet end of the drawer type activated carbon absorber 6 is provided with the other differential pressure gauge 5. In the in-situ chemical oxidation repairing agent injection process, the simultaneous injection and drilling of the agent and air are realized through the high-pressure rotary jet grouting drill rod 11, the liquid flow jet nozzle 12, the drill bit 14 and the hard alloy block 15, and the generated organic waste gas returns to an orifice and is collected and treated by the system.
The gas collecting channel 1 is made of PVC material and is provided with two symmetrical box bodies which are buckled by a lock catch 16.
The gas collection air pipe 4 is a galvanized spiral air pipe.
The range of the differential pressure meter 5 is 0-2000 Pa, when the differential pressure is too large, the activated carbon and the filter screen are required to be replaced, and the normal value of the differential pressure is 150-400 Pa.
The chimney pipe 8 and the chimney top cover 9 are made of carbon steel materials, and anti-corrosion coatings are coated on the surfaces of the chimney pipe 8 and the chimney top cover 9.
The method of use of this example is as follows:
the method comprises the following steps: firstly, clearing a field, determining a high-pressure jet grouting point position, and carrying out hole leading work. After the hole guiding work is finished, the circular hole of the gas collecting hood corresponds to the high-pressure rotary spraying drill rod 11, and the annular gasket 2 is installed to improve the airtightness in the gas collecting hood 1 and reduce the escape of waste gas. The gas-collecting hood 1 is fixed by a lock catch 16, and the lower part of the hood body is firmly inserted into the soil layer. And the gas collection unit, the activated carbon adsorption unit and the exhaust unit are sequentially connected by adopting a connecting flange 3 and a gas collection air pipe 4.
Step two: ensure the working state of the differential pressure gauge 5 to be normal. Opening the activated carbon absorber 6, checking whether the activated carbon filter screen and the activated carbon are clean, and timely replacing the activated carbon filter screen and the activated carbon filter screen when the following conditions are met: the use time of the active carbon and the filter screen reaches (design use time) more than 90 days, namely the adsorption of the active carbon is possibly saturated and the organic waste gas treatment capability is not realized; the filter screen is blocked; the total pressure difference at the inlet and the outlet of the activated carbon adsorber exceeds 800 Pa.
The method for replacing the activated carbon comprises the following steps: and (3) unscrewing a pressing plate screw on the activated carbon adsorber, drawing out the drawer, taking out the pocket filled with the old activated carbon, putting the pocket filled with the activated carbon into the drawer, simultaneously uniformly and tightly spreading the pocket layer by layer, and ensuring that the plane of the pocket is lower than the height plane of the drawer and cannot be randomly stacked so as to avoid uneven filling and cause gas bias flow.
The replacement method of the filter screen comprises the following steps: and opening the sealing plate of the filter screen frame, drawing out the filter screen and putting in a new filter screen. The waste filter screen is properly packaged by plastic and cannot be discarded at will.
Step three: and setting a differential pressure, opening a switch of the fan 7, confirming an exhaust state, and periodically sampling and monitoring an exhaust port to ensure that the exhaust waste gas reaches the standard.
Step four: after the high-pressure rotary spraying construction is finished, the air exhaust state is continuously kept, and the unorganized waste gas and peculiar smell dissipation in the rotary spraying area are reduced. And judging the continuous operation time and the end time of the equipment according to the actual situation in the field.
The above description is only the preferred embodiments of the present invention, and these embodiments are all based on the present invention, and the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (5)
1. A high pressure jet-in situ chemical oxidation remediation orifice waste gas collection and treatment system, comprising: the device comprises a gas collecting hood (1), an annular gasket (2), a connecting flange (3), a gas collecting air pipe (4), a differential pressure gauge (5), a drawer type active carbon absorber (6), a fan (7), a chimney pipeline (8), a chimney top cover (9) and an equipment support (10), and is characterized in that a high-pressure rotary jet grouting drill rod (11) is vertically inserted in the middle position of the gas collecting hood (1), the annular gasket (2) is arranged between the high-pressure rotary jet grouting drill rod (11) and the gas collecting hood (1), one end of the gas collecting air pipe (4) is communicated with the inlet end of the drawer type active carbon absorber (6), the other end of the gas collecting air pipe (4) is communicated with the gas collecting hood (1) through one connecting flange (3), the outlet end of the drawer type active carbon absorber (6) is communicated with the inlet end of the fan (7) through the other connecting flange (3), the lower end of the chimney pipeline (8) is communicated with the outlet end of the fan (7), a chimney top cover (9) is installed at the upper end of the chimney pipeline (8), the fan 7 is installed on the equipment support (10), a differential pressure gauge (5) is installed at the inlet end of the drawer type activated carbon absorber (6), and another differential pressure gauge (5) is installed at the outlet end of the drawer type activated carbon absorber (6); in the in-situ chemical oxidation repair agent injection process, simultaneous injection and drilling of agents and air are realized through a high-pressure rotary jet grouting drill rod (11), a liquid flow jet nozzle (12), a drill bit (14) and a hard alloy block (15), and organic waste gas generated by the injection process returns to an orifice and is collected and treated through the system.
2. The high-pressure jet-in-situ chemical oxidation remediation orifice waste gas collection and treatment system of claim 1, wherein the gas collecting hood (1) is made of PVC and is provided in two symmetrical boxes, and the two symmetrical boxes are fastened by a lock catch (16).
3. The high-pressure jet-in-situ chemical oxidation remediation orifice waste gas collection and treatment system of claim 1, wherein the gas collection ductwork (4) is a galvanized spiral ductwork.
4. The high-pressure jet grouting-in-situ chemical oxidation remediation orifice exhaust collection and treatment system of claim 1, wherein the range of the differential pressure gauge (5) is 0-2000 Pa.
5. The high-pressure jet grouting-in-situ chemical oxidation restoration orifice waste gas collection and treatment system as claimed in claim 1, wherein the chimney pipe (8) and the chimney roof (9) are made of carbon steel material, and the surfaces of the chimney pipe (8) and the chimney roof (9) are coated with anticorrosive coatings.
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| CN202120739221.6U CN215032301U (en) | 2021-04-12 | 2021-04-12 | High-pressure rotary spraying-in-situ chemical oxidation restoration orifice waste gas collecting and treating system |
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| CN202120739221.6U CN215032301U (en) | 2021-04-12 | 2021-04-12 | High-pressure rotary spraying-in-situ chemical oxidation restoration orifice waste gas collecting and treating system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116586418A (en) * | 2023-05-09 | 2023-08-15 | 生态环境部南京环境科学研究所 | Buried pile capable of slowly releasing medicament for in-situ repair of polluted soil and repair method |
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2021
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116586418A (en) * | 2023-05-09 | 2023-08-15 | 生态环境部南京环境科学研究所 | Buried pile capable of slowly releasing medicament for in-situ repair of polluted soil and repair method |
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