An in-situ thermal desorption device for collaborative treatment of multi-pollutant sites

Abstract

The present invention discloses an in-situ thermal desorption device for collaboratively treating a multi-pollutant site, comprising a heating pipe, a protective device, a steam device and a rotating device; a fixing rod for inserting into a soil layer is fixedly arranged at the bottom of the heating pipe, a heating structure is arranged inside the fixing rod, and the heating structure is connected to the heating pipe; the protective device is arranged on the top of the heating pipe, the steam device is arranged on the side wall of the protective device, and the rotating device is arranged at the bottom of the heating pipe. This structure can realize in-situ thermal desorption of a multi-pollutant site.

Description

Technical Field

[0001] The invention belongs to the technical field of thermal desorption and relates to an in-situ thermal desorption device for collaboratively treating a multi-pollutant site. Background Art

[0002] In-situ thermal desorption technology is a method of heating underground contaminated areas in situ, which greatly increases the temperature of soil and groundwater, heats the contaminated medium in the soil or groundwater and the pollutants contained therein to the boiling point, increases the mobility of pollutants underground, promotes the volatilization and migration of pollutants, and purifies and repairs contaminated land by recovering volatile gaseous pollutants and high-concentration liquid pollutants. The main steps of the in-situ thermal desorption process are: in-situ heat generation or heat source injection, the temperature of the contaminated area increases, the pollutants are separated and desorbed, and the pollutants are extracted to the ground for treatment.

[0003] During the operation of traditional in-situ thermal desorption, it is difficult for locations far away from the heating pipe to be heated, and a lot of heat will be dissipated and wasted, resulting in heat loss. At the same time, when the device is set up in the open air, rainy weather will cause damage to the equipment and increase the soil moisture content, which will affect the heating progress. For this reason, we propose an in-situ thermal desorption device for collaborative treatment of multi-pollutant sites to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide an in-situ thermal desorption device for collaboratively treating a multi-pollutant site, which can achieve in-situ thermal desorption of a multi-pollutant site.

[0005] To achieve the above-mentioned purpose, the in-situ thermal desorption device for collaboratively treating a multi-pollutant site of the present invention comprises a heating pipeline, a protective device, a steam device and a rotating device;

[0006] A fixing rod for inserting into the soil layer is fixedly arranged at the bottom of the heating pipe, a heating structure is arranged inside the fixing rod, and the heating structure is connected with the heating pipe;

[0007] The protective device is arranged on the top of the heating pipe, the steam device is arranged on the side wall of the protective device, and the rotating device is arranged on the bottom of the heating pipe.

[0008] The protective device comprises a support rod fixedly arranged on the top of the heating pipe, a protective plate fixedly arranged on the top of the support rod, the protective plate is inclined, and a water collecting trough is opened on the top of the protective plate.

[0009] The steam device includes a water heating pipe fixedly arranged on the side walls at both ends of the protective plate, a one-way water inlet pipe is fixedly arranged on the top of the water heating pipe, the top of the one-way water inlet pipe is connected with the interior of the water collecting tank, an air outlet pipe is arranged on the side wall of the water heating pipe, an air plate for filtering water is arranged in the air outlet pipe, a transmission assembly is arranged on the air outlet pipe, and an injection device is arranged at the end of the air outlet pipe.

[0010] The rotating device includes a stabilizing rod and a fixed block fixedly arranged at the bottom of the heating pipe, the stabilizing rod passes through the fixed block, a rotating ring is fixedly arranged at the end of the stabilizing rod, a rotating shaft is movably arranged on the inner side wall of the rotating ring, and a rotating plate for turning the soil is fixedly arranged on the rotating shaft.

[0011] The transmission assembly includes a rotating box fixed on the side wall of the air outlet pipe, a transmission rod is movably arranged on the inner wall of the rotating box, the transmission rod can rotate on the inner wall of the rotating box, a driving plate is fixedly arranged on the outer wall of the transmission rod, the driving plate is an arc-shaped structure, and the transmission rod extends out of the rotating box.

[0012] The spray device comprises a heating nozzle fixed to the end of the air outlet pipe, a cleaning nozzle for cleaning and heating is fixedly arranged at the bottom of the air outlet pipe, and the heating nozzle is connected to an air guide pipe.

[0013] The end of the water heating pipe is provided with a water inlet.

[0014] It also includes a conveyor belt, wherein the conveyor belt is sleeved on the outer side wall of the transmission rod and the outer side wall of the rotating shaft.

[0015] The present invention has the following beneficial effects:

[0016] During specific operation, the in-situ thermal desorption device for collaboratively treating a multi-pollutant site described in the present invention is used in conjunction with a protective device and a steam device, so that in rainy weather, the protective plate protects the heating pipe to prevent the influence of rain on the heating pipe. At the same time, after the rain, the heat emitted by the heating pipe evaporates the rainwater collected in the hydrothermal pipe. When the water vapor pressure reaches the minimum pressure of the heating nozzle, it is sprayed by the nozzle through the exhaust pipe, which makes the heating distance farther. At the same time, the heat emitted by the heating pipe is always kept in contact with the soil at the bottom under the blocking of the protective plate and the impact of the steam, so as to prevent heat dissipation, effectively ensure the efficiency of soil heating, and realize in-situ thermal desorption of multi-pollutant sites.

[0017] Furthermore, by using the steam device and the turning device in combination, the steam eruption process drives the rotating shaft to rotate, and when the rotating shaft rotates, the rotating plate rotates, and the rotating plate turns the soil, thereby increasing the contact area between the soil and the high-temperature gas, and the heating efficiency is higher. At the same time, the soil attached to the rotating plate is cleaned to avoid soil accumulation, and a secondary heating effect is also achieved, thereby further improving the efficiency of soil heating and ensuring the cleanliness of the equipment.

[0018] Furthermore, by setting the heating structure between the inside of the fixed rod and the heating pipe in series, and replacing the fixed rod according to the required depth, heat conduction heating of deep pollution can be achieved. The heating nozzle is installed with a corresponding external air duct according to the depth of soil pollution, so as to achieve steam injection heating of deep pollution. With the cooperation of the fixed rod, the heating nozzle and the external air duct, the electric heating tube heat conduction heating method is mainly used, and the steam injection method is supplemented, so as to achieve a synergistic treatment effect between the two heating technologies, solve the problem of uneven soil heating, and improve soil remediation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 It is a schematic diagram of the bottom structure of the present invention;

[0021] Figure 3 It is a structural cross-sectional view of the present invention;

[0022] Figure 4 for Figure 1 The enlarged view of point A in the middle;

[0023] Figure 5 for Figure 3 The enlarged view of point B in the middle;

[0024] Figure 6 for Figure 3 Enlarged view of point C in the middle.

[0025] Among them, 1 is a heating pipe, 2 is a fixed rod, 3 is a support rod, 4 is a protective plate, 5 is a water collecting tank, 6 is a water heating pipe, 7 is a one-way water inlet pipe, 8 is an air outlet pipe, 9 is a heating nozzle, 10 is a cleaning nozzle, 11 is a rotating box, 12 is a transmission rod, 13 is a driving plate, 14 is a conveyor belt, 15 is a fixed block, 16 is a stabilizing rod, 17 is a rotating ring, 18 is a rotating shaft, 19 is a rotating plate, and 20 is an air passing plate. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only an embodiment of a part of the present invention, not all embodiments, and is not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concepts disclosed in the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the present invention.

[0027] The accompanying drawings show schematic diagrams of structures according to embodiments disclosed in the present invention. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0028] refer to Figures 1 to 6 The in-situ thermal desorption device for collaboratively treating multiple pollutants in a site according to the present invention comprises:

[0029] A heating pipe 1 is used to heat the soil, and a fixing rod 2 for inserting into the soil layer is fixedly provided on the top of the heating pipe 1;

[0030] The interior of the fixed rod 2 is an electric heating tube, and the fixed rod 2 is equivalent to the effect of the heating pipe 1. The fixed rod 2 and the heating pipe 1 are also energized and are in a series structure, and the heating effect is exerted at the same time. The depth of the fixed rod 2 is based on the depth of soil pollution. When laying the equipment, the fixed rod 2 of the corresponding length is installed to achieve precise heating;

[0031] A protective device is arranged at the top of the heating pipe 1. The protective device is used to protect the heating pipe 1 and prevent heat from escaping. The protective device includes a support rod 3 fixedly arranged at the top of the heating pipe 1. The support rods 3 are arranged in an array on the heating pipe 1. A protective plate 4 is fixedly arranged on the top of the support rod 3. A heat-collecting material layer is arranged at the bottom of the protective plate 4. The protective plate 4 is arranged obliquely. A water collecting tank 5 is opened on the top of the protective plate 4.

[0032] Insert the fixing rod 2 into the soil, stabilize the equipment, start the heating pipe 1, and the heating pipe 1 emits high temperature heat to heat the surrounding soil. During the heating process of the soil, the heat emitted by the heating pipe 1 is blocked by the protective plate 4 on the top, making it difficult to dissipate, and the heat enters the soil;

[0033] A steam device is arranged on the side wall of the protective device. The steam device is used to emit high-temperature steam for long-distance heat transmission. The steam device includes a water heating pipe 6 fixedly arranged on the side walls at both ends of the protective plate 4. The ends of the water heating pipe 6 can be directly filled with water. A one-way water inlet pipe 7 is fixedly arranged on the top of the water heating pipe 6. The top of the one-way water inlet pipe 7 is connected to the inside of the water collecting tank 5. An air outlet pipe 8 is arranged on the side wall of the water heating pipe 6. An air passing plate 20 for filtering water is arranged on the inner side wall of the air outlet pipe 8. A transmission component is arranged on the air outlet pipe 8. The transmission component includes a fixed arrangement A rotating box 11 is provided on the side wall of the air outlet pipe 8, a transmission rod 12 is movably provided on the inner side wall of the rotating box 11, a conveyor belt 14 is sleeved on the outer side wall of the transmission rod 12 and the outer side wall of the rotating shaft 18, the transmission rod 12 can rotate on the inner side wall of the rotating box 11, a driving plate 13 is fixedly provided on the outer side wall of the transmission rod 12, the driving plate 13 is an arc-shaped structure, the transmission rod 12 extends to the outside of the rotating box 11, an injection device is provided at the end of the air outlet pipe 8, the injection device includes a heating nozzle 9 fixedly provided at the end of the air outlet pipe 8, and a cleaning nozzle 10 is fixedly provided at the bottom of the air outlet pipe 8;

[0034] When it rains, rainwater will be blocked by the protective plate 4, so that rainwater cannot reach the surface of the heating pipe 1. The water collecting tank 5 accumulates rainwater, and then under the action of gravity, rainwater will enter the inside of the water heating pipe 6 through the one-way water inlet pipe 7, so that water flows and accumulates inside the water heating pipe 6. When heating is needed, the heating pipe 1 is started again to increase the temperature. At this time, the high temperature of several hundred degrees around will increase the water temperature inside the water heating pipe 6, and then boil and evaporate. After the water inside the water heating pipe 6 evaporates, the air pressure inside the water heating pipe 6 increases. When the air pressure rises to the minimum pressure of the heating nozzle, the steam passes through the air plate 20 and is ejected by the heating nozzle 9 to heat the remote soil.

[0035] The heating nozzle 9 is connected with an air guide pipe. According to the depth of soil pollution, the air guide pipe of the corresponding depth is connected to inject the hot steam of the steam device into the deep position of soil pollution to improve the thermal desorption effect of deep soil;

[0036] By connecting the heating structure inside the fixed rod 2 and the heating pipe 1 in series, and the fixed rod 2 can be replaced according to the required depth, heat conduction heating of deep pollution can be achieved, and the heating nozzle 9 can also be installed with a corresponding external air guide pipe according to the depth of soil pollution to achieve steam injection heating of deep pollution;

[0037] Under the cooperation of the fixed rod 2, the heating nozzle 9 and the external air guide pipe, the electric heating tube heat conduction is mainly used, and the steam injection method is supplemented, so as to achieve the synergistic treatment effect between the two heating technologies; solve the problem of uneven soil heating and improve the soil remediation efficiency;

[0038] Through the coordinated use of the protective device and the steam device, the protective plate 4 protects the heating pipe 1 during rain, preventing the rain from affecting the heating pipe 1. At the same time, after the rain, the heat emitted by the heating pipe 1 will evaporate the rainwater collected in the water-heating pipe 6, and then be sprayed out by the heating nozzle through the air outlet pipe 8, so that the heating distance is longer. At the same time, the heat emitted by the heating pipe 1 will always be kept in contact with the soil at the bottom under the blocking of the protective plate 4 and the impact of the steam, preventing heat dissipation, and effectively ensuring the efficiency of soil heating.

[0039] A rotating device, which is arranged at the bottom of the heating pipe 1 and is used to turn over the soil. The rotating device includes a fixed block 15 fixedly arranged at the bottom of the heating pipe 1, a stabilizing rod 16 is sleeved on the fixed block 15, a rotating ring 17 is fixedly arranged at the end of the stabilizing rod 16, a rotating shaft 18 is movably arranged on the inner side wall of the rotating ring 17, the rotating shaft 18 can rotate on the inner side wall of the rotating ring 17, and a rotating plate 19 for turning over the soil is fixedly arranged on the outer side wall of the rotating shaft 18;

[0040] The flow of airflow causes the driving plate 13 to rotate. When the driving plate 13 rotates, the transmission rod 12 rotates. The transmission rod 12 rotates, causing the conveyor belt 14 to drive the rotating shaft 18 to rotate. When the rotating shaft 18 rotates, the rotating plate 19 turns over the soil. At the same time, the cleaning nozzle 10 sprays air to clean the soil attached to the outer wall of the rotating plate 19 and heat the turned soil.

[0041] Through the coordinated use of the steam device and the turning device, the rotating shaft 18 is driven to rotate during the steam eruption process. When the rotating shaft 18 rotates, the turning plate 19 can be rotated, so that the turning plate 19 turns the soil, thereby increasing the contact area between the soil and the high-temperature gas, making the heating efficiency higher. At the same time, the soil attached to the turning plate 19 is cleaned to avoid soil accumulation, and a secondary heating effect is also achieved, which further improves the efficiency of soil heating and ensures the cleanliness of the equipment.

Claims

1. An in-situ thermal desorption device for collaboratively treating multiple pollutants at a site, characterized in that: It comprises a heating pipe (1), a protective device, a steam device and a rotating device; A fixing rod (2) for inserting into the soil layer is arranged at the bottom of the heating pipe (1), a heating structure is arranged inside the fixing rod (2), and the heating structure is connected to the heating pipe (1); The protective device is arranged on the top of the heating pipe (1), the steam device is arranged on the side wall of the protective device, and the rotating device is arranged on the bottom of the heating pipe (1); The protective device comprises a support rod (3) arranged at the top of the heating pipe (1); a protective plate (4) is arranged at the top of the support rod (3); the protective plate (4) is arranged at an angle; and a water collecting tank (5) is provided at the top of the protective plate (4); The steam device comprises a water heating pipe (6) arranged on the side walls at both ends of the protective plate (4); a one-way water inlet pipe (7) is arranged on the top of the water heating pipe (6); the top of the one-way water inlet pipe (7) is connected to the inside of the water collecting tank (5); an air outlet pipe (8) is arranged on the side wall of the water heating pipe (6); an air passing plate (20) for filtering water is arranged in the air outlet pipe (8); a transmission component is arranged on the air outlet pipe (8); and a spray device is arranged at the end of the air outlet pipe (8); The rotating device comprises a stabilizing rod (16) and a fixing block (15) arranged at the bottom of the heating pipe (1), the stabilizing rod (16) passes through the fixing block (15), a rotating ring (17) is arranged at the end of the stabilizing rod (16), a rotating shaft (18) is movably arranged on the inner side wall of the rotating ring (17), and a rotating plate (19) for turning over the soil is arranged on the rotating shaft (18); The transmission assembly comprises a rotating box (11) fixed on the side wall of the air outlet pipe (8), a transmission rod (12) is movably arranged on the inner side wall of the rotating box (11), a driving plate (13) is arranged on the outer wall of the transmission rod (12), the driving plate (13) is an arc-shaped structure, and the transmission rod (12) extends out of the rotating box (11).

2. The in-situ thermal desorption device for collaboratively treating multiple pollutants at a site according to claim 1, characterized in that: The spraying device comprises a heating nozzle (9) fixed to the end of an air outlet pipe (8), a cleaning nozzle (10) is arranged at the bottom of the air outlet pipe (8), and the heating nozzle (9) is connected to an air guide pipe.

3. The in-situ thermal desorption device for collaboratively treating multiple pollutants at a site according to claim 1, characterized in that: The end of the water heating pipe (6) is provided with a water inlet.

4. The in-situ thermal desorption device for collaboratively treating multiple pollutants at a site according to claim 1, characterized in that: It also includes a conveyor belt (14), wherein the conveyor belt (14) is sleeved on the outer wall of the transmission rod (12) and the outer wall of the rotating shaft (18).

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