A high-efficiency gas-liquid separation system and method for groundwater in VOCs-contaminated soil

Abstract

The present application relates to a high-efficiency gas-liquid separation system and method for VOCs-contaminated soil and groundwater. The system includes a first gas-liquid separation tank, a cooling system, a second gas-liquid separation tank, etc. Groundwater is first introduced into the first gas-liquid separation tank, and the first gas-liquid separation tank heats the groundwater to separate gas and liquid. After the gas is cooled by the cooling system to form a gas-liquid mixture, it is again introduced into the second gas-liquid separation tank for heating and separation. Through the two heatings, organic matter enters the activated carbon adsorption chamber in the form of gas for adsorption, while the moisture in the gas is reduced as much as possible to improve the adsorption effect.

Description

Technical Field

[0001] The present application belongs to the technical field of water purification equipment, and in particular, relates to a high-efficiency gas-liquid separation system and method for groundwater in VOCs-contaminated soil. Background Art

[0002] Water pollution is the reduction or loss of water's use value caused by harmful chemicals, which pollutes the environment. Acids, alkalis, oxidants, compounds such as copper, cadmium, mercury, arsenic, and organic toxins such as benzene, ethylene dichloride, and ethylene glycol in sewage can kill aquatic organisms and affect drinking water sources and scenic landscapes. VOCs (volatile organic compounds) are a common water pollutant at present. For organic pollutants with a boiling point lower than that of water, VOCs can be removed by heating, and organic matter overflows in the form of gas.

[0003] Chinese patent document CN117208995A discloses a gas-liquid separation device based on volatile organic pollutants in groundwater. The device can directly heat groundwater to separate organic pollutants from water. However, it does not have a systematic treatment of organic pollutants. At the same time, the heated gas contains more water vapor, which affects the life of the gas adsorption treatment membrane and leads to lower adsorption efficiency. Summary of the invention

[0004] The technical problem to be solved by the present invention is to solve the deficiencies in the prior art and thus provide an efficient gas-liquid separation system and method for groundwater of VOCs-contaminated soil with high adsorption efficiency.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] A high-efficiency gas-liquid separation system for groundwater in VOCs-contaminated soil, comprising:

[0007] a first gas-liquid separation tank having an inlet pipe for receiving groundwater from the contaminated soil, capable of heating the groundwater to separate gas and liquid, and having a liquid outlet and a gas outlet;

[0008] A cooling system, used for cooling the gas flowing out of the first gas-liquid separation tank, wherein the heat exchanger is connected to the gas outlet of the first gas-liquid separation tank;

[0009] A second gas-liquid separation tank, the inlet of which is connected to the outlet of the heat exchanger, for heating and separating the gas-liquid mixture, and having a liquid outlet and a gas outlet;

[0010] A water pump is used to be connected to the liquid outlets of the first gas-liquid separation tank and the second gas-liquid separation tank to extract the liquid separated by the first gas-liquid separation tank and the second gas-liquid separation tank and discharge the liquid. When the separated liquid meets the discharge standard, it can be directly discharged;

[0011] A vacuum pump, used to provide power for the outflow of gas in the first gas-liquid separation tank and the second gas-liquid separation tank;

[0012] The activated carbon adsorption chamber is connected to the gas outlet of the second gas-liquid separation tank to adsorb volatile gas in the gas;

[0013] The exhaust chimney is communicated with the activated carbon adsorption chamber, and the gas passing through the activated carbon adsorption chamber is exhausted through the exhaust chimney.

[0014] Preferably, in the high-efficiency gas-liquid separation system for groundwater of VOCs-contaminated soil of the present invention, the structure of the first gas-liquid separation tank and / or the second gas-liquid separation tank is: comprising a tank body, a heating component and an exhaust valve; the heating component is accommodated in the tank body;

[0015] The tank body includes a support tube, which passes through the center line of the tank body and penetrates the heating component. The upper part and the bottom of the support tube are respectively provided with a liquid inlet and a liquid outlet. The support tube has a hollow chamber inside. The liquid inlet and the liquid outlet are connected through the chamber. A plurality of holes are provided on the side wall of the support tube for connecting the chamber with the outside. The top of the tank body is provided with an air outlet, which is connected to an air outlet pipe. An exhaust valve is installed on the air outlet pipe to control the opening and closing of the air outlet.

[0016] The top of the tank body is respectively provided with a liquid storage cavity, a heat transfer liquid inlet, and a heat transfer liquid outlet, and the tank body further comprises a spacer ring, which separates the liquid storage cavity into a first liquid storage cavity and a second liquid storage cavity, wherein the first liquid storage cavity is connected to the heat transfer liquid inlet, and the second liquid storage cavity is connected to the heat transfer liquid outlet;

[0017] The heating component comprises a connecting transmission disc, a first vortex spiral plate, a second vortex spiral plate, an upper connecting arc plate, and a lower connecting arc plate. The connecting transmission disc is sleeved on the top of the support cylinder and is sealed and abutted against the bottom of the liquid storage chamber. The connecting transmission disc has a transmission gear ring on its outer edge, and the transmission gear ring is used to cooperate with an external motor. Hot liquid inlet holes and hot liquid outlet holes are respectively opened on different circumferences of the connecting transmission disc. The hot liquid inlet hole is located in the first liquid storage chamber and is connected to the heat transfer liquid inlet. The hot liquid outlet hole is located in the second liquid storage chamber and is connected to the heat transfer liquid outlet.

[0018] The top of the first vortex spiral plate and the top of the second vortex spiral plate are fixedly connected to the connecting transmission disk respectively, and the first vortex spiral plate and the second vortex spiral plate are driven to rotate synchronously when the connecting transmission disk rotates. The top of the first vortex spiral plate and the top of the second vortex spiral plate are connected by the upper connecting arc plate, and the bottom is connected by the lower connecting arc plate. The interiors of the first vortex spiral plate, the second vortex spiral plate, the upper connecting arc plate, and the lower connecting arc plate are all hollow structures. The interior of the first vortex spiral plate is connected to the hot liquid inlet hole, and the interior of the second vortex spiral plate is connected to the hot liquid outlet hole.

[0019] Preferably, in the high-efficiency gas-liquid separation system for groundwater in VOCs-contaminated soil of the present invention, the first spiral spiral plate and the second spiral spiral plate are spiral structures in the vertical direction; and the horizontal cross-sections of the first spiral spiral plate and the second spiral spiral plate are spiral structures.

[0020] Preferably, in the high-efficiency gas-liquid separation system for groundwater in VOCs-contaminated soil of the present invention, the outer edges of the top and bottom of the support tube are respectively provided with annular grooves, and the outer edge of the support tube is provided with a plurality of vertical grooves in the vertical direction, and the annular grooves are connected to the vertical grooves.

[0021] Preferably, the high-efficiency gas-liquid separation system for groundwater in VOCs-contaminated soil of the present invention further comprises a cleaning component, wherein the cleaning component comprises a connecting ring and a cleaning arc plate, wherein the inner layer of the connecting ring has a groove key at a preset position, and the outer layer of the connecting ring has a plurality of cleaning arc plates arranged in an array, wherein the connecting ring is sleeved on the support tube and the groove key is accommodated in the vertical groove, and there is a gap between adjacent cleaning arc plates for accommodating the first vortex spiral plate and the second vortex spiral plate; the width of the gap is adapted to the thickness of the first vortex spiral plate and the second vortex spiral plate

[0022] Preferably, the high-efficiency gas-liquid separation system for groundwater in VOCs-contaminated soil of the present invention comprises a heat exchanger, a cooling tower, a circulating water tank and a power pump, wherein the circulating water tank is used to store refrigerant, and the power pump drives the refrigerant to circulate in the heat exchanger, the cooling tower and the circulating water tank.

[0023] Preferably, in the high-efficiency gas-liquid separation system for groundwater in VOCs-contaminated soil of the present invention, the first gas-liquid separation tank and the second gas-liquid separation tank are two parallel ones, and the processing volume of the second gas-liquid separation tank is one third to one half of that of the first gas-liquid separation tank.

[0024] Preferably, the high-efficiency gas-liquid separation system for groundwater of VOCs-contaminated soil of the present invention further includes an outer frame of a container, and the first gas-liquid separation tank, the cooling system, the second gas-liquid separation tank, the water pump, the vacuum pump, the activated carbon adsorption chamber and the exhaust chimney are all located inside the outer frame of the container.

[0025] The present invention also provides a method for efficient gas-liquid separation of VOCs-contaminated soil and groundwater, using the above-mentioned efficient gas-liquid separation system of VOCs-contaminated soil and groundwater, comprising the following steps:

[0026] Connecting the inlet pipe of the first gas-liquid separation tank to the water treatment well to receive groundwater flowing out of the water treatment well;

[0027] Using a first gas-liquid separation tank to heat groundwater to separate gas and liquid, the gas discharged from the first gas-liquid separation tank is passed into a cooling system, the cooling system cools the gas passing through the first gas-liquid separation tank, the gas-liquid mixture flowing out of the cooling system is passed into a second gas-liquid separation tank, and is heated and separated by the second gas-liquid separation tank, the gas flowing out of the second gas-liquid separation tank is passed into an activated carbon adsorption chamber for adsorption, and the gas passing through the activated carbon adsorption chamber is discharged into the air;

[0028] The liquid separated in the first gas-liquid separation tank and the second gas-liquid separation tank is pumped by a water pump and flows out from the bottom liquid outlet.

[0029] Preferably, in the high-efficiency gas-liquid separation method of VOCs-contaminated soil and groundwater of the present invention, a cleaning component is used to scrape and clean the first vortex spiral plate and the second vortex spiral plate during treatment intervals or after a period of treatment.

[0030] The beneficial effects of the present invention are:

[0031] The high-efficiency gas-liquid separation system for groundwater in VOCs-contaminated soil of the present invention first introduces groundwater into a first gas-liquid separation tank, which heats the groundwater to separate gas and liquid. After the gas is cooled by a cooling system to form a gas-liquid mixture, it is introduced into a second gas-liquid separation tank again for heating and separation. Through the two heatings, organic matter enters the activated carbon adsorption chamber in the form of gas for adsorption, while the moisture in the gas is reduced as much as possible to improve the adsorption effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The technical solution of the present application is further described below in conjunction with the accompanying drawings and embodiments.

[0033] Figure 1 This is a schematic diagram of the structure of the high-efficiency gas-liquid separation system for groundwater in VOCs-contaminated soil of the present invention;

[0034] Figure 2This is a schematic structural diagram of another direction of the high-efficiency gas-liquid separation system for groundwater in VOCs-contaminated soil of the present invention;

[0035] Figure 3 This is a schematic diagram of the assembly structure of the first gas-liquid separation tank of the present invention;

[0036] Figure 4 for Figure 3 A schematic cross-sectional view of the first gas-liquid separation tank;

[0037] Figure 5 for Figure 4 A schematic diagram of the enlarged structure of the first gas-liquid separation tank in the middle;

[0038] Figure 6 for Figure 3 A schematic diagram of the assembly structure of the heating assembly of the first gas-liquid separation tank;

[0039] Figure 7 for Figure 6 A schematic cross-sectional view of the heating assembly of the first gas-liquid separation tank;

[0040] Figure 8 for Figure 3 Schematic diagram of the cleaning component assembly structure of the first gas-liquid separation tank.

[0041] in:

[0042] 3- Water pump;

[0043] 4- Vacuum pump;

[0044] 5-Cooling system;

[0045] 6- Heating equipment;

[0046] 7-activated carbon adsorption chamber;

[0047] 8-Empty the chimney;

[0048] 11-first gas-liquid separation tank;

[0049] 12- second gas-liquid separation tank;

[0050] 51-heat exchanger;

[0051] 52-Cooling tower;

[0052] 54-power pump;

[0053] 61-Liquid storage tank;

[0054] 100-tank;

[0055] 110-support tube;

[0056] 111-liquid inlet;

[0057] 112-Liquid outlet;

[0058] 113-chamber;

[0059] 114-hole;

[0060] 115-ring groove;

[0061] 116-vertical slot;

[0062] 117-air outlet;

[0063] 118-exhaust valve;

[0064] 120-liquid storage chamber;

[0065] 121-first liquid storage chamber;

[0066] 122- second liquid storage chamber;

[0067] 130 - heat transfer liquid inlet;

[0068] 140-heat transfer liquid outlet;

[0069] 150-spacer ring;

[0070] 200-heating component;

[0071] 210-connecting the transmission plate;

[0072] 211- transmission gear ring;

[0073] 212- hydrothermal inlet hole;

[0074] 213- hydrothermal outlet;

[0075] 220-first vortex spiral plate;

[0076] 230 - second vortex spiral plate;

[0077] 240-upper connecting arc plate;

[0078] 250-lower connecting arc plate;

[0079] 300-pressure relief valve;

[0080] 400-cleaning components;

[0081] 410-connecting ring;

[0082] 420-Cleaning arc plate;

[0083] 430-slot key;

[0084] 440-gap;

[0085] 500-Temperature transmitter;

[0086] 600-pressure transmitter;

[0087] 700-manhole;

[0088] 800-Magnetic flap level gauge. DETAILED DESCRIPTION

[0089] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0090] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application. In addition, the terms "first", "second", etc. are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the invention, unless otherwise specified, "multiple" means two or more.

[0091] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0092] The technical solution of the present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0093] Example 1

[0094] This embodiment provides an efficient gas-liquid separation system for groundwater in VOCs-contaminated soil. The entire system includes a container frame for easy transportation and installation. Figure 1 As shown, including:

[0095] A first gas-liquid separation tank 11 has an inlet pipe for receiving groundwater from the contaminated soil, is capable of heating the groundwater to separate gas and liquid, and has a liquid outlet and a gas outlet;

[0096] The cooling system 5 is used to cool the gas flowing out of the first gas-liquid separation tank 11, and includes a heat exchanger 51, a cooling tower 52, a circulating water tank 53 and a power pump 54. The circulating water tank 53 is used to store refrigerant, and the power pump 54 drives the refrigerant to circulate in the heat exchanger 51 and the cooling tower 52. The heat exchanger 51 is connected to the gas outlet of the first gas-liquid separation tank 11; (the heat exchanger 51 has a refrigerant inlet and an outlet, a cooled object-gas inlet and a cooling product-gas-liquid mixture outlet, and the pipelines of the two are separated but can perform heat exchange)

[0097] A second gas-liquid separation tank 12, the inlet of which is connected to the outlet of the heat exchanger 51, for heating and separating the gas-liquid mixture, and having a liquid outlet and a gas outlet;

[0098] A water pump 3 is used to be connected to the liquid outlets of the first gas-liquid separation tank 11 and the second gas-liquid separation tank 12 to extract the liquid separated by the first gas-liquid separation tank 11 and the second gas-liquid separation tank 12 and discharge the liquid. The separated liquid can be directly discharged when it meets the emission standard (this application only processes VOCs. If other pollutants need to be treated, they will be passed into other treatment equipment);

[0099] A vacuum pump 4, used to provide power for the outflow of gas in the first gas-liquid separation tank 11 and the second gas-liquid separation tank 12;

[0100] A heating device 6, used to provide heat energy to the first gas-liquid separation tank 11 and the second gas-liquid separation tank 12;

[0101] The activated carbon adsorption chamber 7 is connected to the gas outlet of the second gas-liquid separation tank 12 to adsorb volatile gases in the gas; (the activated carbon filter membrane in the activated carbon adsorption chamber 7 needs to be replaced regularly)

[0102] The exhaust chimney 8 is communicated with the activated carbon adsorption chamber 7 , and the gas passing through the activated carbon adsorption chamber 7 is exhausted through the exhaust chimney 8 .

[0103] In the high-efficiency gas-liquid separation system for groundwater in VOCs-contaminated soil of the present embodiment, groundwater is first introduced into the first gas-liquid separation tank 11, and the first gas-liquid separation tank 11 heats the groundwater to separate gas and liquid. After the gas is cooled by the cooling system 5 to form a gas-liquid mixture, it is introduced into the second gas-liquid separation tank 12 again for heating and separation. Through the two heatings, the organic matter enters the activated carbon adsorption chamber 7 in the form of gas for adsorption, while the moisture in the gas is reduced as much as possible to improve the adsorption effect.

[0104] The first gas-liquid separation tank 11 and the second gas-liquid separation tank 12 are two parallel ones, and the processing volume of the second gas-liquid separation tank 12 is one third to one half of the first gas-liquid separation tank 11 .

[0105] The heating temperature of the second gas-liquid separation tank 12 is lower than the heating temperature of the first gas-liquid separation tank 11, and the temperature difference is 10°C to 20°C.

[0106] The first gas-liquid separation tank 11 and / or the second gas-liquid separation tank 12 has the following structure: comprising a tank body 100, a heating assembly 200 and an exhaust valve 118; the heating assembly 200 is accommodated in the tank body 100, and the exhaust valve is installed on the exhaust pipeline of the tank body 100 to control the discharge of the gas in the tank body 100;

[0107] like Figure 4 As shown, the tank body 100 includes a support tube 110, which passes through the center line position of the tank body 100 and penetrates the heating component 200. The upper part and the bottom of the support tube 110 are respectively provided with a liquid inlet 111 and a liquid outlet 112. The support tube 110 has a hollow chamber 113, and the liquid inlet 111 and the liquid outlet 112 are connected through the chamber 113. A plurality of holes 114 are provided on the side wall of the support tube 110 for connecting the chamber 113 with the outside; an air outlet 117 is provided on the top of the tank body 100, and the air outlet 117 is connected to the air outlet pipe. An exhaust valve 118 is installed on the air outlet pipe to control the opening and closing of the air outlet 117;

[0108] like Figure 5 As shown, the top of the tank body 100 is respectively provided with a liquid storage chamber 120, a heat transfer liquid inlet 130, and a heat transfer liquid outlet 140. The tank body 100 also includes a spacer ring 150, which divides the liquid storage chamber into a first liquid storage chamber 121 and a second liquid storage chamber 122. The first liquid storage chamber 121 is connected to the heat transfer liquid inlet 130, the heat transfer liquid inlet 130 is connected to the heating device 6, and the second liquid storage chamber 122 is connected to the heat transfer liquid outlet 140. The specific heating medium is water. The system of this embodiment mainly processes VOCs with a boiling point below the boiling point of water.

[0109] like Figure 6 and Figure 7As shown, the heating component 200 includes a connecting transmission disk 210, a first vortex spiral plate 220, a second vortex spiral plate 230, an upper connecting arc plate 240, and a lower connecting arc plate 250. The connecting transmission disk 210 is sleeved on the top of the support cylinder 110 and is sealed and abutted with the bottom of the liquid storage chamber 120. The connecting transmission disk 210 has a transmission gear ring 211 on its outer edge, and the transmission gear ring 211 is used to cooperate with an external motor. Hot liquid inlet holes 212 and hot liquid outlet holes 213 are respectively opened on different circumferences of the connecting transmission disk 210. The hot liquid inlet hole 212 is located in the first liquid storage chamber 121 and is connected to the heat transfer liquid inlet 130. The hot liquid outlet hole 213 is located in the second liquid storage chamber 122 and is connected to the heat transfer liquid outlet 140.

[0110] The top of the first vortex spiral plate 220 and the top of the second vortex spiral plate 230 are respectively fixedly connected to the connecting transmission disk 210, and when the connecting transmission disk 210 rotates, the first vortex spiral plate 220 and the second vortex spiral plate 230 are driven to rotate synchronously. The top of the first vortex spiral plate 220 and the top of the second vortex spiral plate 230 are connected by the upper connecting arc plate 240, and the bottom is connected by the lower connecting arc plate 250. The interiors of the first vortex spiral plate 220, the second vortex spiral plate 230, the upper connecting arc plate 240, and the lower connecting arc plate 250 are all hollow structures. The interior of the first vortex spiral plate 220 is connected to the hot liquid inlet hole 212, and the interior of the second vortex spiral plate 230 is connected to the hot liquid outlet hole 213.

[0111] The first spiral plate 220 and the second spiral plate 230 are spiral structures in the vertical direction; the horizontal cross-sections of the first spiral plate 220 and the second spiral plate 230 are spiral structures. The difference between the first spiral plate 220 and the second spiral plate 230 is that the outer ring of the first spiral plate 220 is larger than the outer ring of the second spiral plate 230 and is close to the inner wall of the tank body 100, and there is a gap between the outer ring of the second spiral plate 230 and the inner wall of the tank body 100 to allow groundwater to pass through, and the inner ring of the second spiral plate 230 is smaller than the inner ring of the first spiral plate 220 and is close to the outer wall of the support tube 110, that is, there is a gap between the inner ring of the first spiral plate 220 and the outer wall of the support tube 110 to allow groundwater to pass through.

[0112] When it is necessary to treat groundwater, the groundwater to be treated is introduced into the support cylinder 110 through the liquid inlet 111, and the groundwater to be treated flows in the chamber 113, and part of it flows out from the hole 114 to the heating component 200, and the liquid outlet 112 is in a closed state. The external motor is started, and the external motor drives the connecting drive plate 210 to rotate through the transmission gear ring 211, and the transmission plate 210 drives the first vortex spiral plate 220, the second vortex spiral plate 230, the upper connecting arc plate 240, and the lower connecting arc plate 250 to rotate together. At the same time, hot liquid is generated by the heating device 6, stored in the liquid storage tank 61, pumped in from the heat transfer liquid inlet 130, and then flows into the first liquid storage chamber 121, and flows into the first spiral plate 220 from the hot liquid inlet hole 212 of the first liquid storage chamber 121. The hot liquid circulates in the first spiral plate 220, the second spiral plate 230, the upper connecting arc plate 240, and the lower connecting arc plate 250, flows out from the hot liquid outlet hole 213 to the second liquid storage chamber 122, and then flows out from the second liquid storage chamber 122 to the heat transfer liquid outlet 140, and then flows out from the heat transfer liquid outlet 140 to the outside. During the rotation of the first spiral plate 220, the second spiral plate 230, the upper connecting arc plate 240, and the lower connecting arc plate 250, the groundwater to be treated is driven to move in the vertical direction. In addition to the vertical movement caused by the arrangement of the first spiral plate 220, the second spiral plate 230, the upper connecting arc plate 240, and the lower connecting arc plate 250, the groundwater will also form a circulation flow inside and outside the first spiral plate 220 and the second spiral plate 230, and the first spiral plate 220 and the tank body 10 form a circulation flow. 0 flows into the channel between the next first spiral plate 220 and the second spiral plate 230 through the outer gap of the outer wall, flows toward the center of the inner circle in this channel, then flows from the inner gap between the first spiral plate 220 and the inner wall of the tank body 100 into the channel between the next first spiral plate 220 and the second spiral plate 230, flows toward the outer circle in this channel, then flows from the outer gap between the outer walls of 220 and 100 into the channel between the next first spiral plate 220 and the second spiral plate 230, and the above process forms a cycle. At the same time, the first spiral plate 220, the second spiral plate 230, the upper connecting arc plate 240, and the lower connecting arc plate 250 continuously heat the groundwater to be treated through the internal hot liquid, so that the gas and liquid are separated, the gas is extracted from the exhaust valve 118, and the liquid is discharged from the liquid outlet 112.

[0113] In this way, the present invention is configured by the coordination of the tank body 100, the heating component 200 and the exhaust valve 118. The tank body 100 includes the support tube 110, and the heating component 200 includes the connecting transmission disk 210, the first vortex spiral plate 220, the second vortex spiral plate 230, the upper connecting arc plate 240, and the lower connecting arc plate 250. The groundwater to be heated flows in from the liquid inlet 111 of the support tube 110, and the groundwater can flow out from the plurality of holes 114 on the side wall of the support tube 110. The external hot liquid enters the first vortex spiral plate 220 and the second vortex spiral plate 230 from the heat transfer liquid inlet 130. When the heating component 200 is driven to rotate by the motor, the hot liquid can flow in the first vortex spiral plate 220 and the second vortex spiral plate 230. The heat transfer liquid flows inside the spiral plate 230, the upper connecting arc plate 240, and the lower connecting arc plate 250, and flows out from the heat transfer liquid outlet 140, which can directly heat the groundwater. Through the arrangement of the first spiral spiral plate 220 and the second spiral spiral plate 230, the distance between two adjacent spiral spiral plates can be more uniform from the inside to the outside, thereby improving the heating effect inside and outside; at the same time, the first spiral spiral plate 220 and the second spiral spiral plate 230 are spiral structures, which makes the groundwater move in the vertical direction, destroying the boundary layer of the groundwater and improving the heating efficiency. Moreover, the groundwater will accelerate through the gap between the first spiral spiral plate and the second spiral spiral plate and the tank body under the action of its own gravity, thereby further improving the heating efficiency.

[0114] In one embodiment, annular grooves 115 are respectively formed on the outer edges of the top and bottom of the support tube 110 , and a plurality of vertical grooves 116 are formed on the outer edge of the support tube 110 along the vertical direction. The annular grooves 115 are connected to the vertical grooves 116 .

[0115] The gas-liquid separation system also includes a cleaning component 400, which includes a connecting ring 410 and a cleaning arc plate 420. The connecting ring 410 has a groove key 430 at a preset position on the inner layer, and the connecting ring 410 has a plurality of cleaning arc plates 420 arranged in an array on the outer layer. The connecting ring 410 is sleeved on the support cylinder 110 and the groove key 430 is accommodated in the vertical groove 116. There is a gap 440 between adjacent cleaning arc plates 420 for accommodating the first vortex spiral plate 220 and the second vortex spiral plate 230; the width of the gap 440 is adapted to the thickness of the first vortex spiral plate 220 and the second vortex spiral plate 230.

[0116] After the groundwater is heated by the heating component 200, a lot of impurities will adhere to the surface of the heating component 200, which seriously affects the heat transfer and reduces the efficiency of the equipment. Therefore, the present application sets a cleaning component 400.

[0117] like Figure 8As shown, in the initial state, the coupling ring 410 is sleeved on the annular groove 115 at the bottom, and the slot key 430 is accommodated in the annular groove 115 at the bottom. When the heating component 200 starts to rotate, the heating component 200 rotates relative to the cleaning component 400, driving the coupling ring 410 to move from the annular groove 115 at the bottom to the annular groove 115 at the top. During the movement, the slot key 430 moves toward the top along the vertical groove 116, and the cleaning arc plate 420 scrapes and cleans the adjacent first vortex spiral plate 220 and the second vortex spiral plate 230 until the coupling ring 410 moves into the annular groove 115 at the top and rotates with the heating component 200. When the heating component 200 stops rotating, the coupling ring 410 and the cleaning arc plate 420 slide toward the bottom in the vertical groove 116 through the slot key 430 due to gravity. The first vortex spiral plate 220 and the second vortex spiral plate 230 are scraped and cleaned by the cleaning arc plate 420 of the cleaning assembly 400 to clean the impurities on the surface.

[0118] In one embodiment, the gas-liquid separation device further includes a temperature transmitter 500 , which is installed on the tank body 100 and is used to detect the temperature value inside the tank body 100 .

[0119] In this way, the temperature value in the tank body 100 is detected in real time by the temperature transmitter 500 and sent to the control module. When the temperature value in the tank body 100 exceeds the preset threshold, the control module stops adding hot liquid to ensure the safety of the gas-liquid separation equipment.

[0120] In one embodiment, the gas-liquid separation device further includes a pressure transmitter 600 , which is installed on the tank body 100 and is used to detect the pressure value in the tank body 100 .

[0121] In this way, the pressure transmitter 600 detects the pressure value inside the tank body 100 in real time and sends it to the control module. When the pressure value is greater than the preset threshold, the exhaust valve 118 is controlled to open, and the internal gas is pumped out through an external air pump to avoid damage to the gas-liquid separation equipment caused by excessive pressure in the tank body 100.

[0122] In one of the embodiments, the gas-liquid separation device further includes a manhole 700 , which is installed on the tank body 100 and is used for inspecting the inside of the tank body 100 .

[0123] In this way, by providing the manhole 700 , when the gas-liquid separation device is not working, the internal devices of the device can be inspected, repaired or replaced through the manhole 700 .

[0124] In one of the embodiments, the gas-liquid separation device further includes a magnetic flap liquid level meter 800 , which is installed on the tank body 100 and is used to detect the liquid level value in the tank body 100 .

[0125] In this way, the magnetic flap level meter 800 detects the liquid level value in the tank body 100 in real time and sends it to the control module. When the liquid level value of the groundwater added is too high, the control module controls to stop adding groundwater.

[0126] The tank body 100 is also provided with a pressure relief valve 300 to provide emergency pressure relief when the pressure in the tank body 100 exceeds the pressure threshold of the pressure relief valve 300 .

[0127] Example 2

[0128] This embodiment provides a method for efficiently separating VOCs-contaminated soil and groundwater from gas and liquid. The method uses the efficient gas-liquid separation system for separating VOCs-contaminated soil and groundwater of Embodiment 1, and comprises the following steps:

[0129] Connecting the inlet pipe of the first gas-liquid separation tank 11 to the water treatment well to receive the groundwater flowing out of the water treatment well;

[0130] The first gas-liquid separation tank 11 is used to heat groundwater to separate gas and liquid, and the gas discharged from the first gas-liquid separation tank 11 is passed into the cooling system 5. The cooling system 5 cools the gas passing through the first gas-liquid separation tank 11. The gas-liquid mixture flowing out of the cooling system 5 is passed into the second gas-liquid separation tank 12 (the gas will be directly discharged, and the liquid will enter the tank body), and is heated and separated by the second gas-liquid separation tank 12. The gas flowing out of the second gas-liquid separation tank 12 is passed into the activated carbon adsorption chamber 7 for adsorption, and the gas passing through the activated carbon adsorption chamber 7 is discharged into the air;

[0131] The liquid separated in the first gas-liquid separation tank 11 and the second gas-liquid separation tank 12 is pumped by the water pump 3 and flows out from the bottom liquid outlet.

[0132] The filling and treatment process of the first gas-liquid separation tank 11 is continued until all the groundwater has been treated.

[0133] Since the present application only processes volatile organic pollutants, if the liquid processed by the first gas-liquid separation tank 11 has reached the discharge standard, it can also be discharged directly.

[0134] During the treatment interval or after a period of treatment, the first volute spiral plate 220 and the second volute spiral plate 230 are scraped and cleaned using the cleaning assembly 400 .

[0135] Based on the above ideal embodiments of this application, the relevant staff can make various changes and modifications without departing from the technical concept of this application through the above description. The technical scope of this application is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A high-efficiency gas-liquid separation system for groundwater in VOCs-contaminated soil, characterized in that: include: A first gas-liquid separation tank (11) has an inlet pipe for receiving groundwater from contaminated soil, is capable of heating the groundwater to separate gas and liquid, and has a liquid outlet and a gas outlet; A cooling system (5) for cooling the gas flowing out of the first gas-liquid separation tank (11), wherein the heat exchanger (51) is connected to the gas outlet of the first gas-liquid separation tank (11); a second gas-liquid separation tank (12), wherein the inlet of the second gas-liquid separation tank (12) is connected to the outlet of the heat exchanger (51), heats and separates the gas-liquid mixture, and has a liquid outlet and a gas outlet; A water pump (3) is used to be connected to the liquid outlets of the first gas-liquid separation tank (11) and the second gas-liquid separation tank (12) to extract the liquid separated by the first gas-liquid separation tank (11) and the second gas-liquid separation tank (12) and discharge the liquid. When the separated liquid meets the discharge standard, it is directly discharged; A vacuum pump (4) used to provide power for the outflow of gas from the first gas-liquid separation tank (11) and the second gas-liquid separation tank (12); An activated carbon adsorption chamber (7) is connected to the gas outlet of the second gas-liquid separation tank (12) to adsorb volatile gases in the gas; An exhaust chimney (8) is connected to the activated carbon adsorption chamber (7), and the gas passing through the activated carbon adsorption chamber (7) is exhausted through the exhaust chimney (8); The structure of the first gas-liquid separation tank (11) and / or the second gas-liquid separation tank (12) is as follows: comprising a tank body (100), a heating component (200) and an exhaust valve (118); the heating component (200) is accommodated in the tank body (100); The tank body (100) comprises a support tube (110), the support tube (110) passes through the center line of the tank body (100) and penetrates the heating component (200), the support tube (110) is provided with a liquid inlet (111) and a liquid outlet (112) at the top and bottom, respectively, the support tube (110) has a hollow chamber (113) therein, the liquid inlet (111) and the liquid outlet (112) are connected via the chamber (113), a plurality of holes (114) are provided on the side wall of the support tube (110) for connecting the chamber (113) with the outside, and an air outlet (117) is provided on the top of the tank body (100), the air outlet (117) is connected to an air outlet pipe, and an exhaust valve (118) is installed on the air outlet pipe to control the opening and closing of the air outlet (117); The top of the tank body (100) is respectively provided with a liquid storage chamber (120), a heat transfer liquid inlet (130), and a heat transfer liquid outlet (140); the tank body (100) further comprises a spacer ring (150), the spacer ring separating the liquid storage chamber into a first liquid storage chamber (121) and a second liquid storage chamber (122); the first liquid storage chamber (121) is connected to the heat transfer liquid inlet (130), and the second liquid storage chamber (122) is connected to the heat transfer liquid outlet (140); The heating component (200) comprises a connecting transmission disc (210), a first vortex spiral plate (220), a second vortex spiral plate (230), an upper connecting arc plate (240), and a lower connecting arc plate (250); the connecting transmission disc (210) is sleeved on the top of the support cylinder (110) and is in sealing contact with the bottom of the liquid storage chamber (120); a transmission gear ring (211) is provided on the outer edge of the connecting transmission disc (210); the transmission gear ring (211) is used to cooperate with an external motor; hot liquid inlet holes (212) and hot liquid outlet holes (213) are respectively provided on different circumferences of the connecting transmission disc (210); the hot liquid inlet hole (212) is located in the first liquid storage chamber (121) and is communicated with the heat transfer liquid inlet (130); the hot liquid outlet hole (213) is located in the second liquid storage chamber (122) and is communicated with the heat transfer liquid outlet (140); The top of the first vortex spiral plate (220) and the top of the second vortex spiral plate (230) are respectively fixedly connected to the connecting transmission disk (210). When the connecting transmission disk (210) rotates, the first vortex spiral plate (220) and the second vortex spiral plate (230) are driven to rotate synchronously. The top of the first vortex spiral plate (220) and the top of the second vortex spiral plate (230) are connected via the upper connecting arc plate (240), and the bottom of the first vortex spiral plate (220) and the bottom of the second vortex spiral plate (230) are connected via the lower connecting arc plate (250). The interiors of the first vortex spiral plate (220), the second vortex spiral plate (230), the upper connecting arc plate (240), and the lower connecting arc plate (250) are all hollow structures. The interior of the first vortex spiral plate (220) is connected to the hot liquid inlet hole (212), and the interior of the second vortex spiral plate (230) is connected to the hot liquid outlet hole (213).

2. The high-efficiency gas-liquid separation system for groundwater in VOCs-contaminated soil according to claim 1, characterized in that: The first vortex spiral plate (220) and the second vortex spiral plate (230) are spiral structures in the vertical direction; and the first vortex spiral plate (220) and the second vortex spiral plate (230) are vortex structures in horizontal cross-section.

3. The high-efficiency gas-liquid separation system for groundwater in VOCs-contaminated soil according to claim 1, characterized in that: The outer edges of the top and bottom of the support tube (110) are respectively provided with annular grooves (115), and the outer edge of the support tube (110) is provided with a plurality of vertical grooves (116) along the vertical direction, and the annular grooves (115) are connected to the vertical grooves (116).

4. The high-efficiency gas-liquid separation system for groundwater in VOCs-contaminated soil according to claim 3, characterized in that: The high-efficiency gas-liquid separation system for groundwater in soil contaminated by VOCs further comprises a cleaning component (400), wherein the cleaning component (400) comprises a connecting ring (410) and a cleaning arc plate (420), wherein the inner layer of the connecting ring (410) has a slot key (430) at a preset position, and the outer layer of the connecting ring (410) has a plurality of cleaning arc plates (420) arranged in an array, wherein the connecting ring (410) is sleeved on the support tube (110) and the slot key (430) is accommodated in the vertical groove (116), and there is a gap (440) between adjacent cleaning arc plates (420) for accommodating the first vortex spiral plate (220) and the second vortex spiral plate (230); the width of the gap (440) is adapted to the thickness of the first vortex spiral plate (220) and the second vortex spiral plate (230).

5. The high-efficiency gas-liquid separation system for groundwater of VOCs-contaminated soil according to claim 1, characterized in that: The invention comprises a heat exchanger (51), a cooling tower (52), a circulating water tank (53) and a power pump (54); the circulating water tank (53) is used to store refrigerant, and the power pump (54) drives the refrigerant to circulate in the heat exchanger (51), the cooling tower (52) and the circulating water tank (53).

6. The high-efficiency gas-liquid separation system for groundwater in VOCs-contaminated soil according to claim 1, characterized in that: The first gas-liquid separation tank (11) and the second gas-liquid separation tank (12) are two in parallel, and the processing volume of the second gas-liquid separation tank (12) is one third to one half of that of the first gas-liquid separation tank (11).

7. The high-efficiency gas-liquid separation system for groundwater in VOCs-contaminated soil according to claim 1, characterized in that: It also includes a container outer frame, wherein a first gas-liquid separation tank (11), a cooling system (5), a second gas-liquid separation tank (12), a water pump (3), a vacuum pump (4), an activated carbon adsorption chamber (7) and an exhaust chimney (8) are all located within the container outer frame.

8. A highly efficient gas-liquid separation method for VOCs-contaminated soil and groundwater, characterized in that: The high-efficiency gas-liquid separation system for groundwater of VOCs-contaminated soil using any one of claims 1 to 7 comprises the following steps: Connecting the inlet pipe of the first gas-liquid separation tank (11) to the water treatment well to receive groundwater flowing out of the water treatment well; Using a first gas-liquid separation tank (11) to heat groundwater to separate gas and liquid, the gas discharged from the first gas-liquid separation tank (11) is passed into a cooling system (5), the cooling system (5) cools the gas that has passed through the first gas-liquid separation tank (11), the gas-liquid mixture that flows out of the cooling system (5) is passed into a second gas-liquid separation tank (12), and is heated and separated by the second gas-liquid separation tank (12), the gas that flows out of the second gas-liquid separation tank (12) is passed into an activated carbon adsorption chamber (7) for adsorption, and the gas that has passed through the activated carbon adsorption chamber (7) is discharged into the air; The liquid separated in the first gas-liquid separation tank (11) and the second gas-liquid separation tank (12) is pumped by the water pump (3) and flows out from the bottom liquid outlet.

9. The high-efficiency gas-liquid separation method of VOCs-contaminated soil and groundwater according to claim 8, characterized in that: After a period of treatment, the first vortex spiral plate (220) and the second vortex spiral plate (230) are scraped and cleaned using a cleaning assembly (400).

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