Heat recovery filtering pipeline for raw gas treatment

Abstract

The invention relates to the technical field of raw gas treatment, and discloses a heat recovery filter pipeline for raw gas treatment, which comprises an outer shell, a fixed plate is fixedly connected in the outer shell, a movable plate is movably connected in the outer shell, and the fixed plate and the movable plate divide the inner part of the outer shell into a recovery cavity, a left cavity and a right cavity. And an inner core body is arranged in the recovery cavity. The inner part is divided into the inner spiral cavity and the outer spiral cavity which are alternately distributed, high-temperature gas flows in the inner spiral cavity, demineralized water flows in the outer spiral cavity, the heat exchange stroke of the high-temperature gas and the demineralized water can be effectively increased by utilizing the double-spiral layout arrangement, and the flowing demineralized water is arranged on the two sides of the high-temperature gas in the inner spiral cavity, so that the heat exchange efficiency is improved. And flowing high-temperature gas is arranged on the two sides of the demineralized water of the outer spiral cavity, so that the waste heat recovery efficiency of the high-temperature gas is effectively improved, and the waste heat recovery effect is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of raw gas treatment, in particular to a heat recovery filtering pipeline for raw gas treatment. Background Art

[0002] In order to solve the problem of resource waste and environmental pollution caused by direct discharge of raw coal gas through flares, it is necessary to convert the raw coal gas into high-value synthesis gas with H2 and CO as the main components and separate and purify it through a series of clean and efficient utilization processes such as compression and washing, conversion, transformation, low-temperature methanol washing, PSA adsorption separation, etc., and then produce high-end chemical products through carbonization, hydrogenation and refining technology.

[0003] At the same time, the high-temperature gas after conversion (220°C) and transformation (267°C) is sent to the acid gas removal process after heat recovery to 40°C through the low-pressure waste heat boiler, desalted water preheater, and water cooler. The temperature of the high-temperature gas after conversion and transformation is recovered by the desalted water preheater, which reduces heat waste and achieves the effect of energy saving.

[0004] However, in a Chinese patent with patent publication number CN217210426U, a boiler condensate waste heat recovery device is disclosed, including a filter box and a water recovery mechanism, a plate frame is arranged in the middle of the filter box, and a slide plate is slidably installed at the bottom of the plate frame, the right end face of the slide plate is fixedly connected to an outer plate, and handles are symmetrically fixedly installed on the front and back end faces of the outer plate, a sealing ring is sleeved on the inner side of the outer plate, and the water recovery mechanism for condensate recycling is arranged at equal intervals on the top of the slide plate, the water recovery mechanism includes a base, a notch, a vertical plate, a screw and a crank, a notch is penetrated through the right side of the base, and a vertical plate is fixedly installed on the left side of the top of the base, a screw is rotatably installed on the inner side of the vertical plate, and a crank is sleeved on the right input end of the screw. The waste heat recovery mechanism also includes a fork-shaped part, cooling fins, a fitting groove and a column protrusion. A fork-shaped part is arranged inside the water storage bin, and the fork-shaped part is connected to the filter box through a pipeline. Cooling fins are set on both sides of the bottom of the fork-shaped part, and fitting grooves are provided on the side end surfaces of the cooling fins. Column protrusions are arranged at equal intervals on the front and back sides of the cooling fins.

[0005] Although the above device can recover waste heat, the overall heat exchange stroke is short, the heat exchange space utilization is low, and waste heat is recovered only through heat dissipation fins, resulting in low overall waste heat recovery efficiency. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a heat recovery filtration pipeline for raw gas treatment, which has the advantage of high waste heat recovery efficiency.

[0007] To achieve the above object, the present invention provides the following technical solutions: A heat recovery and filtering pipeline for treating raw coal gas, comprising an outer shell, a fixed plate fixedly connected to the interior of the outer shell, a movable plate movably connected to the interior of the outer shell, the fixed plate and the movable plate dividing the interior of the outer shell into a recovery chamber, a left cavity and a right cavity, an inner core body is arranged inside the recovery chamber, a water guide chamber fixedly connected to the interior of the left cavity, an axis of the water guide chamber fixedly connected to an air intake pipe interface extending to the outside of the left cavity, and a detachable cover plate is installed at the outer end of the right cavity; The inner core body comprises an air inlet duct and an air outlet duct, wherein the air inlet duct is sealed and plugged into the inside of the air inlet pipe interface, and the air outlet duct passes through the movable plate and the cover plate and extends to the outside; An annular push block for positioning is arranged outside the movable plate.

[0008] Preferably: the inner core also includes a spiral sheet, which is composed of a double spiral sheet, and the head and tail of the double spiral sheet are respectively welded with an air inlet duct and an air outlet duct, the air inlet duct is located on the center side of the spiral sheet, and the air outlet duct is located on the outer side of the spiral sheet, and the two spiral end surfaces of the spiral sheet are detachably installed with end spiral covers, and the interior of the spiral sheet forms an inner spiral cavity, the inner core abuts against a fixed plate and a movable plate through the end spiral covers on both sides, and the movable plate is fixedly abutted against the outer side of the end spiral covers by an annular push block.

[0009] Preferably: the inner core body divides the interior of the recovery chamber into an outer spiral chamber, the outside of the outer shell body is fixedly connected with a water inlet pipe interface, the water inlet pipe interface is connected to the outer circle of the outer spiral chamber, the shaft portion of the fixed plate is provided with a connecting port for connecting the water guide chamber and the recovery chamber, the water guide chamber is connected to the center position of the outer spiral chamber of the inner core body through the connecting port, and the outside of the water guide chamber is fixedly connected with a water outlet pipe interface.

[0010] Preferably, a sealing gasket is arranged on the outer side of the end spiral cover, and the end spiral cover is in contact with the fixed plate and the movable plate through a rubber gasket.

[0011] Preferably: the annular push block is movably connected to the inside of the right cavity, the outside of the annular push block is movably connected with a positioning ring, the side of the positioning ring is provided with an annular clamping groove, the side of the right cavity is threadedly connected with a positioning rod, the positioning rod is clamped in the inside of the annular clamping groove, and the annular push block abuts against the outside of the movable plate.

[0012] Preferably: the outside of the positioning ring is fixedly connected with at least two guide rods, the guide rods are inserted into the inside of the annular push block, the outside of the annular push block is rotatably connected with an adjusting bolt, the adjusting bolt and the guide rods are threadedly connected, and the adjusting bolt is used to adjust the distance between the annular push block and the positioning ring.

[0013] Preferably, the interior of the spiral sheet is fixedly connected with a plurality of spoiler rods, the spoiler rods penetrate the spiral sheet, and the spoiler rods are located above the inner spiral cavity of the spiral sheet.

[0014] Preferably, the top of the spoiler rod abuts against the top surface of the adjacent outer spiral cavity, and the bottom of the spoiler rod abuts against the bottom surface of the inner spiral cavity.

[0015] Preferably, an inner heat-conducting cavity is provided inside the spoiler rod, an inner wall of the inner heat-conducting cavity is attached with an inner wall layer, and an isolation layer is provided in the middle of the inner heat-conducting cavity.

[0016] Preferably, the inner heat-conducting cavity is filled with evaporative liquid, and the spoiler rod forms a normal-temperature heat pipe through the inner heat-conducting cavity, the inner wall layer and the isolation layer.

[0017] Beneficial effects of the present invention: 1. The heat recovery filtration pipeline for raw gas treatment is divided into spiral cavities alternately distributed inside and outside, wherein high-temperature gas flows inside the inner spiral cavity and desalted water flows inside the outer spiral cavity. The double-helix layout is used to effectively increase the heat exchange stroke of high-temperature gas and desalted water. Both sides of the high-temperature gas in the inner spiral cavity are flowing desalted water, and both sides of the desalted water in the outer spiral cavity are flowing high-temperature gas, thereby effectively improving the waste heat recovery efficiency of the high-temperature gas and ensuring the waste heat recovery effect.

[0018] 2. The heat recovery filter pipeline for treating raw coal gas has a spoiler rod arranged so that when the desalted water and the high-temperature gas flow in the outer spiral cavity and the inner spiral cavity respectively, the spoiler rod can interfere with the flow patterns of the flowing gas or liquid, thereby effectively increasing the heat exchange effect of the gas and liquid; at the same time, the spoiler rod can increase the thermal conductivity effect, and can effectively introduce the heat of the high-temperature gas into the desalted water, thereby increasing the waste heat recovery effect of the high-temperature gas; and because the top of the spoiler rod abuts the top surface of the adjacent outer spiral cavity, and the bottom of the spoiler rod abuts the bottom surface of the inner spiral cavity, the spoiler rod can synchronously maintain the stability of the overall spiral shape of the inner core, which is convenient for installing the inner core in the recovery cavity, or when the inner core is removed from the recovery cavity, the structural stability of the inner core can be effectively maintained, thereby effectively reducing the difficulty of disassembly, assembly and maintenance of the heat recovery filter pipeline for treating raw coal gas and improving the use effect.

[0019] 3. The heat recovery filter pipeline for treating raw coal gas further increases the heat exchange effect and the waste heat recovery effect of high-temperature gas by setting the spoiler rod as a normal temperature heat pipe and utilizing the heat pipe principle.

[0020] 4. The heat recovery filter pipeline for raw gas treatment is assembled in a detachable manner, and the high-temperature gas belongs to an independent inner spiral cavity. The desalted water flows in the recovery cavity. Therefore, when the desalted water generates dirt inside the recovery cavity, the recovery pipeline can be easily disassembled and assembled, which is convenient for the maintenance and cleaning of the waste heat recovery pipeline, thereby facilitating the improvement of the waste heat recovery effect of the high-temperature gas after conversion and transformation, and effectively improving the service life of the heat recovery filter pipeline for raw gas treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is an external schematic diagram of the waste heat recovery pipeline of the present invention; Figure 2 This is a schematic diagram of the cross-sectional state of the waste heat recovery pipeline of the present invention; Figure 3 This is a schematic diagram of the decomposition state of the waste heat recovery pipeline of the present invention; Figure 4 It is a schematic cross-sectional view of the outer shell of the present invention; Figure 5 This is a schematic diagram of the interior of the outer shell of the present invention; Figure 6 It is a schematic diagram of the inner core of the present invention; Figure 7 It is a schematic diagram of the movable plate, the positioning ring and the cover plate of the present invention; Figure 8 This is a schematic diagram of the inner core body of the present invention in a disassembled state; Fig. 9 It is a schematic diagram of the connection between the spiral sheet and the spoiler rod of the present invention; Fig.10 It is a schematic diagram of the interior of the spoiler rod of the present invention; Fig.11 For the present invention Figure 2 A magnified schematic diagram of part A; Fig.12 It is a schematic diagram of the raw gas processing process of the present invention.

[0022] In the figure: 1. outer shell; 11. fixed plate; 111. connecting port; 12. movable plate; 13. recovery chamber; 14. left chamber; 15. right chamber; 16. water inlet pipe interface; 17. water guide chamber; 18. water outlet pipe interface; 19. air inlet pipe interface; 2. cover plate; 3. inner core; 31. air inlet duct; 32. air outlet duct; 33. spiral sheet; 34. end spiral cover; 35. spoiler rod; 351. inner heat conduction chamber; 352. inner wall layer; 353. isolation layer; 4. annular push block; 41. positioning ring; 42. guide rod; 43. adjusting bolt; 44. annular clamping groove; 45. positioning rod. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Example: Reference Fig.12 The raw material waste gas is compressed, converted, transformed, acid-stripped, and PSA is used to extract CO and hydrogen to obtain qualified carbon monoxide and hydrogen, which are used as raw materials for downstream ethylene glycol production.

[0025] After the raw coal gas is compressed and converted, one stream is transformed, acid-purified, and then hydrogenated by PSA to obtain H2; The other stream is subjected to heat recovery, acid removal and purification, and then to PSA CO stripping to obtain carbon monoxide. The penetration gas from PSA CO stripping and the above-mentioned conversion purified gas enter PSA hydrogen stripping to obtain H2.

[0026] The carbon monoxide is pressurized and sent to the ethylene glycol unit separately with the hydrogen.

[0027] 1. Raw gas compression process: The raw coal gas needs to be compressed to meet the operating requirements of the downstream acid removal and PSA process. The coal gas compressor is divided into two series. The 0.04MPaG coal gas sent from the boundary area is removed by the inlet separator to remove saturated water and some oil dust and other impurities before entering the inlet of the coal gas compressor. It is compressed to 3.0MPaG in five stages and sent to the coal gas conversion process.

[0028] 2. Conversion process: The CH4 contained in the raw coal gas is converted into effective synthesis gas CO and H2 through a non-catalytic partial oxidation process. At the same time, the organic sulfur, tar, HCN, benzene, naphthalene, and possible impurities such as sulfides and mercaptans in the raw coal gas are decomposed or converted into non-toxic or easy-to-handle components through a high-temperature conversion reaction (1200-1300℃), avoiding the impact on downstream processes and product quality.

[0029] 3. Conversion process: The conversion is to make CO and H2O (g) in the process gas undergo a conversion reaction to generate H2 and CO2 under certain pressure and temperature conditions and in the presence of a catalyst. The reaction formula is as follows:

[0030] Through the above reactions, the composition of the process gas is adjusted, wherein excessive CO is reduced to the required content, and excessive H2 is increased to the required concentration to meet the needs of the ethylene glycol process for H2 and CO.

[0031] The conversion reaction is an exothermic reaction, and the reaction heat decreases as the temperature increases.

[0032] 4. Heat recovery process: The high-temperature gas after conversion (220°C) and transformation (267°C) passes through the low-pressure waste heat boiler, desalted water preheater, and water cooler in sequence to recover heat and cool to 40°C before being sent to the acid gas removal process.

[0033] 5. Low temperature methanol washing process: The principle is based on Raoult's law and Henry's law. According to the selectivity of methanol in low temperature state, it has high solubility and absorption for acidic gases such as H2S and CO2, but low solubility and absorption for H2 and CO, so as to remove acidic gases such as H2S and CO2 in the crude conversion gas, thereby achieving the purpose of purifying the raw gas.

[0034] 6. Propylene compression refrigeration process: Liquid propylene is an easily accessible and excellent industrial refrigerant because it absorbs a large amount of heat when a unit mass of liquid propylene turns into gaseous propylene. Liquid propylene can absorb a large amount of heat when it evaporates, and the amount of heat absorbed will increase as the evaporation temperature decreases. The principle of propylene compression refrigeration is to use the compression, condensation, throttling and evaporation of propylene to form a cycle to provide cooling to the outside world.

[0035] 7. PSA process: This device uses pressure swing adsorption (PSA) technology to purify CO and H2 components. The principle of the pressure swing adsorption process is to use the characteristics of the adsorbent used to show different adsorption amounts of different components with different pressures to separate the strongly adsorbed components from the weakly adsorbed components. Under a certain adsorption pressure, the raw gas enters the adsorption tower, and the strongly adsorbed components with larger adsorption capacity are adsorbed and retained in the bed, while the weakly adsorbed components with smaller adsorption capacity are output from the outlet of the bed. The saturated adsorbent is desorbed and regenerated through steps such as decompression, flushing and evacuation. When the bed is saturated with adsorption, close the raw gas inlet valve and the product gas outlet valve, stop inputting the raw gas, and complete the whole process.

[0036] 8. VOC process: Tail gas incineration adopts direct incineration treatment technology. The incinerator is divided into a reduction combustion furnace and an oxidation combustion furnace. The reduction combustion furnace is mainly used to incinerate by-product liquids, and the temperature is controlled to be no less than 1100℃, and the flue gas residence time is no less than 2 seconds; the thermal oxidation combustion furnace is used to treat tail gas, and the treatment temperature is controlled at 900℃, and the flue gas residence time is no less than 1 second. After complete combustion, the flue gas passes through the waste heat boiler to generate 1.2MPaG saturated steam, and then passes through the air preheater, tail gas heat exchanger and economizer in turn to fully recycle the flue gas waste heat, and finally reaches the standard discharge through the chimney.

[0037] Among them, the waste heat recovery in process four is achieved through the following heat recovery filtration pipeline.

[0038] See also Figure 1 - Fig.11 A heat recovery and filtering pipeline for treating raw coal gas, comprising an outer shell 1, a fixed plate 11 is fixedly connected to the interior of the outer shell 1, a movable plate 12 is movably connected to the interior of the outer shell 1, the fixed plate 11 and the movable plate 12 divide the interior of the outer shell 1 into a recovery chamber 13, a left cavity 14 and a right cavity 15, an inner core 3 is arranged inside the recovery chamber 13, a water guide chamber 17 is fixedly connected to the interior of the left cavity 14, an axis of the water guide chamber 17 is fixedly connected to an air intake pipe interface 19 extending to the outside of the left cavity 14, and a detachable cover plate 2 is installed at the outer end of the right cavity 15; The inner core 3 includes an air inlet duct 31 and an air outlet duct 32, wherein the air inlet duct 31 is sealed and plugged into the inside of the air inlet pipe interface 19, and the air outlet duct 32 passes through the movable plate 12 and the cover plate 2 and extends to the outside; The outside of the movable plate 12 is provided with an annular push block 4 for positioning.

[0039] Among them, the air inlet pipe interface 19 and the air outlet duct 32 are externally connected to the converted and transformed high-temperature gas air duct. The high-temperature gas enters through the air inlet pipe interface 19, enters the inner core 3 through the air inlet pipe interface 19 and the air inlet duct 31, and is then discharged through the air outlet duct 32. The high-temperature gas exchanges heat with the desalted water inside the recovery chamber 13 inside the inner core 3, and the waste heat of the converted and transformed high-temperature gas is recovered by absorbing heat from the desalted water.

[0040] In an optional embodiment: the inner core 3 also includes a spiral sheet 33, and the spiral sheet 33 is composed of a double spiral sheet, and the head and tail of the double spiral sheet are respectively welded to an air inlet duct 31 and an air outlet duct 32, the air inlet duct 31 is located on the center side of the spiral sheet 33, and the air outlet duct 32 is located on the outer side of the spiral sheet 33. The two spiral end faces of the spiral sheet 33 are detachably installed with end spiral covers 34, and the interior of the spiral sheet 33 forms an inner spiral cavity, and the inner core 3 abuts against the fixed plate 11 and the movable plate 12 through the end spiral covers 34 on both sides, and the movable plate 12 is fixedly abutted against the outer side of the end spiral covers 34 through the annular push block 4.

[0041] The inner core body 3 divides the interior of the recovery chamber 13 into an outer spiral chamber, and the outside of the outer shell 1 is fixedly connected with a water inlet pipe interface 16, and the water inlet pipe interface 16 is connected to the outer circle of the outer spiral chamber. The shaft portion of the fixed plate 11 is provided with a connecting port 111 for connecting the water guide chamber 17 and the recovery chamber 13, and the water guide chamber 17 is connected to the center position of the outer spiral chamber of the inner core body 3 through the connecting port 111, and the outside of the water guide chamber 17 is fixedly connected with a water outlet pipe interface 18.

[0042] It should be noted that the recovery chamber 13 is divided into inner and outer spiral chambers alternately distributed through the inner core 3, wherein the high-temperature gas flows inside the inner spiral chamber, and the desalted water flows inside the outer spiral chamber. The double-helix layout can effectively increase the heat exchange stroke of the high-temperature gas and the desalted water. The high-temperature gas on both sides of the inner spiral chamber is flowing desalted water, and the desalted water on both sides of the outer spiral chamber is flowing high-temperature gas, thereby effectively improving the waste heat recovery efficiency of the high-temperature gas and ensuring the waste heat recovery effect.

[0043] refer to Figure 2 and Figure 3 In an optional embodiment, a sealing gasket is provided on the outer side of the end spiral cover 34 , and the end spiral cover 34 abuts against the fixed plate 11 and the movable plate 12 through a rubber gasket.

[0044] The annular push block 4 is movably connected to the inside of the right cavity 15, and the outside of the annular push block 4 is movably connected with a positioning ring 41. The side of the positioning ring 41 is provided with an annular clamping groove 44. The side of the right cavity 15 is threadedly connected with a positioning rod 45. The positioning rod 45 is clamped in the inside of the annular clamping groove 44, and the annular push block 4 abuts against the outside of the movable plate 12.

[0045] The outside of the positioning ring 41 is fixedly connected with at least two guide rods 42, and the guide rods 42 are inserted into the inside of the annular push block 4. The outside of the annular push block 4 is rotatably connected with an adjusting bolt 43, and the adjusting bolt 43 is threadedly connected to the guide rods 42. The adjusting bolt 43 is used to adjust the distance between the annular push block 4 and the positioning ring 41.

[0046] It should be noted that when the device is used, the air inlet duct 31 of the inner core 3 is inserted into the air inlet pipe interface 19, and the left side of the spiral sheet 33 is abutted against the side of the fixing plate 11; Then, the movable plate 12 is installed into the interior of the outer shell 1, and the movable plate 12 is plugged into the exterior of the air outlet duct 32; When the installation of the movable plate 12 is completed, the annular push block 4 is installed, so that the positioning ring 41 is inserted into the interior of the right cavity 15; The positioning rod 45 is rotated to control the positioning rod 45 to engage in the annular engaging groove 44 , and the positioning ring 41 is fixed by the positioning rod 45 to keep the position of the positioning ring 41 in the right cavity 15 stable.

[0047] At this time, the inner side surface of the annular push block 4 abuts against the side surface of the movable plate 12. By rotating the adjusting bolt 43, the adjusting bolt 43 can adjust the distance between the annular push block 4 and the positioning ring 41 through the threaded connection with the guide rod 42, so that the annular push block 4 reinforces the movable plate 12, so that the movable plate 12 and the fixed plate 11 clamp the inner core 3 in the middle, and then complete the installation of the cover plate 2, and then complete the assembly of the high-temperature gas waste heat recovery pipeline.

[0048] Through a detachable assembly method, the high-temperature gas belongs to an independent inner spiral cavity, and the desalted water flows in the recovery cavity 13. Therefore, when the desalted water generates dirt inside the recovery cavity 13, the recovery pipeline can be conveniently disassembled and assembled, and the maintenance and cleaning of the waste heat recovery pipeline are convenient, thereby facilitating the improvement of the waste heat recovery effect of the converted and transformed high-temperature gas, and effectively improving the service life of the heat recovery filter pipeline for raw gas treatment.

[0049] In an optional embodiment, the spiral sheet 33 is internally fixedly connected with a number of spoiler rods 35 , the spoiler rods 35 penetrate the spiral sheet 33 , and the spoiler rods 35 are located above the inner spiral cavity of the spiral sheet 33 .

[0050] The top of the spoiler rod 35 abuts against the top surface of the adjacent outer spiral cavity, and the bottom of the spoiler rod 35 abuts against the bottom surface of the inner spiral cavity.

[0051] It should be noted that, through the provision of the spoiler rod 35, when the deionized water and the high-temperature gas flow in the outer spiral cavity and the inner spiral cavity respectively, the spoiler rod 35 can interfere with the flow pattern of the flowing gas or liquid, thereby effectively increasing the heat exchange effect of the gas and liquid; At the same time, the spoiler rod 35 can increase the heat conduction effect, can effectively conduct the heat of the high-temperature gas into the desalted water, and increase the waste heat recovery effect of the high-temperature gas; And because the top of the spoiler rod 35 abuts the top surface of the adjacent outer spiral cavity, and the bottom of the spoiler rod 35 abuts the bottom surface of the inner spiral cavity, the spoiler rod 35 can simultaneously maintain the stability of the overall spiral shape of the inner core 3, which is convenient for installing the inner core 3 in the recovery cavity 13, or when the inner core 3 is removed from the recovery cavity 13, the structural stability of the inner core 3 can be effectively maintained, thereby effectively reducing the difficulty of disassembly, assembly and maintenance of the heat recovery filter pipeline for raw gas treatment and improving the use effect.

[0052] In an optional embodiment, an inner heat-conducting cavity 351 is opened inside the spoiler rod 35 , an inner wall layer 352 is attached to the inner wall of the inner heat-conducting cavity 351 , and an isolation layer 353 is arranged in the middle of the inner heat-conducting cavity 351 .

[0053] The inner heat-conducting cavity 351 is filled with evaporative liquid, and the spoiler rod 35 forms a normal-temperature heat pipe through the inner heat-conducting cavity 351 , the inner wall layer 352 and the isolation layer 353 .

[0054] The spoiler rod 35 is fixed to the spiral sheet 33 by welding.

[0055] It should be noted that by setting the spoiler rod 35 as a normal temperature heat pipe and utilizing the heat pipe principle, the heat exchange effect is further increased, and the waste heat recovery effect of the high-temperature gas is further improved.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heat recovery filter pipeline for treating raw coal gas, comprising an outer shell (1), characterized in that: The outer shell (1) is fixedly connected to a fixed plate (11) inside, and the outer shell (1) is movably connected to a movable plate (12) inside. The fixed plate (11) and the movable plate (12) divide the interior of the outer shell (1) into a recovery chamber (13), a left chamber (14) and a right chamber (15). The recovery chamber (13) is provided with an inner core (3). The left chamber (14) is fixedly connected to a water guide chamber (17). The shaft of the water guide chamber (17) is fixedly connected to an air intake pipe interface (19) extending to the outside of the left chamber (14). A detachable cover plate (2) is installed at the outer end of the right chamber (15); The inner core (3) comprises an air inlet duct (31) and an air outlet duct (32), wherein the air inlet duct (31) is sealed and plugged into the interior of the air inlet pipe interface (19), and the air outlet duct (32) penetrates the movable plate (12) and the cover plate (2) and extends to the outside; An annular push block (4) for positioning is arranged outside the movable plate (12).

2. The heat recovery and filtering pipeline for treating raw coal gas according to claim 1 is characterized in that: The inner core (3) further comprises a spiral sheet (33), wherein the spiral sheet (33) is composed of a double spiral sheet, and an air inlet duct (31) and an air outlet duct (32) are welded to the head and tail of the double spiral sheet respectively, wherein the air inlet duct (31) is located at the center side of the spiral sheet (33), and the air outlet duct (32) is located at the outer side of the spiral sheet (33). The two spiral end surfaces of the spiral sheet (33) are detachably mounted with end spiral covers (34), and the interior of the spiral sheet (33) forms an inner spiral cavity. The inner core (3) abuts against the fixed plate (11) and the movable plate (12) through the end spiral covers (34) on both sides, and the movable plate (12) abuts against the outer side of the end spiral covers (34) through the fixing of the annular push block (4).

3. The heat recovery and filtering pipeline for treating raw gas according to claim 2 is characterized in that: The inner core (3) divides the interior of the recovery chamber (13) into an outer spiral chamber; the outer portion of the outer shell (1) is fixedly connected to a water inlet pipe interface (16); the water inlet pipe interface (16) is connected to the outer ring of the outer spiral chamber; the shaft portion of the fixed plate (11) is provided with a connecting port (111) for connecting the water guide chamber (17) and the recovery chamber (13); the water guide chamber (17) is connected to the central position of the outer spiral chamber of the inner core (3) via the connecting port (111); and the outer portion of the water guide chamber (17) is fixedly connected to a water outlet pipe interface (18).

4. The heat recovery and filtering pipeline for treating raw gas according to claim 2 is characterized in that: A sealing gasket is provided on the outer side of the end spiral cover (34), and the end spiral cover (34) is in contact with the fixed plate (11) and the movable plate (12) via a rubber gasket.

5. The heat recovery and filtering pipeline for treating raw coal gas according to claim 1 is characterized in that: The annular push block (4) is movably connected to the inside of the right cavity (15); the outside of the annular push block (4) is movably connected to a positioning ring (41); a side of the positioning ring (41) is provided with an annular clamping groove (44); a side of the right cavity (15) is threadedly connected to a positioning rod (45); the positioning rod (45) is clamped to the inside of the annular clamping groove (44); and the annular push block (4) abuts against the outside of the movable plate (12).

6. A heat recovery and filtering pipeline for treating raw coal gas according to claim 5, characterized in that: The outside of the positioning ring (41) is fixedly connected to at least two guide rods (42), the guide rods (42) penetrate and are inserted into the inside of the annular push block (4), the outside of the annular push block (4) is rotatably connected to an adjusting bolt (43), the adjusting bolt (43) and the guide rods (42) are threadedly connected, and the adjusting bolt (43) is used to adjust the distance between the annular push block (4) and the positioning ring (41).

7. The heat recovery and filtering pipeline for treating raw gas according to claim 2 is characterized by: The spiral sheet (33) is internally fixedly connected with a plurality of flow-disturbing rods (35), the flow-disturbing rods (35) penetrate the spiral sheet (33), and the flow-disturbing rods (35) are located above the inner spiral cavity of the spiral sheet (33).

8. The heat recovery and filtering pipeline for treating raw coal gas according to claim 7 is characterized in that: The top of the spoiler rod (35) abuts against the top surface of the adjacent outer spiral cavity, and the bottom of the spoiler rod (35) abuts against the bottom surface of the inner spiral cavity.

9. The heat recovery and filtering pipeline for treating raw coal gas according to claim 7 is characterized in that: An inner heat-conducting cavity (351) is provided inside the spoiler rod (35), an inner wall of the inner heat-conducting cavity (351) is adhered to an inner wall layer (352), and an isolation layer (353) is provided in the middle of the inner heat-conducting cavity (351).

10. A heat recovery and filtering pipeline for treating raw coal gas according to claim 9, characterized in that: The inner heat-conducting cavity (351) is filled with evaporative liquid, and the spoiler rod (35) forms a normal-temperature heat pipe through the inner heat-conducting cavity (351), the inner wall layer (352) and the isolation layer (353).

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