Coke oven riser raw gas sensible heat recycling device
By designing a heat recovery device for sensible gas from coke oven riser, and using the heat exchanger of the riser and drum and other equipment to recover the heat heat of the waste gas, the problem of insufficient recycling and utilization of the waste gas in traditional processes is solved, and efficient energy utilization and improvement of the operating environment is achieved.
Patent Information
- Application Number
- CN202421645389.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-07-12
AI Technical Summary
In traditional coking coking workshops, the sensible heat of the waste gas in the coke oven riser pipe part is not fully recycled, resulting in problems such as waste of thermal energy resources and corrosion of high-temperature waste gas.
A heat recovery device for sensible gas from coke oven riser is designed, including a heat exchanger, a steam and water unit and a water replenishment unit. Through the heat exchanger of the riser and drum and other equipment, the heat heat of the waste gas is recovered, so that the saturated water becomes saturated water vapor and utilized.
The full recycling and utilization of the sensible heat of the coke oven riser pipe waste gas has been achieved, the energy utilization rate of the coking plant has been improved, the furnace top temperature has been reduced, the operating environment has been improved, and the energy saving and consumption have been significantly reduced.
Smart Images
Figure CN222799656U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of waste heat recovery, in particular to a device for recovering sensible heat of raw coal gas from a coke oven riser. Background Art
[0002] In the coke production process of the coke oven in the traditional coking coking workshop, the coal cake is isolated from the air and heated and distilled to 950-1050℃ in the carbonization chamber. During the heating process, a large amount of raw coal gas at 770-830℃ will be decomposed and discharged from the top space of the carbonization chamber through the traditional riser, bridge pipe, and gas collecting pipe to the suction pipe. In the traditional process, there are ammonia nozzles for cooling the raw coal gas on the bridge pipe and the gas collecting pipe to spray ammonia water (the circulating ammonia water pressure is 0.2-0.4MPa and the temperature is 70-80℃). After the raw coal gas passes through the traditional riser, the circulating ammonia water is sprayed in the bridge pipe and the gas collecting pipe through the nozzle to cool it down. Since the temperature of the raw coal gas is very high, when the fine mist of ammonia water is fully in contact with the raw coal gas, the ammonia water absorbs heat and evaporates in large quantities, and the temperature of the raw coal gas drops rapidly. The temperature of the raw coal gas is high, and the sensible heat is large, which contains a large amount of thermal energy resources. The above-mentioned traditional process adopts the method of directly spraying ammonia water into the raw coal gas to quench it. Although the high-temperature raw coal gas is quickly cooled and the raw coal gas is sharply cooled to 80-85°C, the above-mentioned process wastes a large amount of sensible heat of the raw coal gas and consumes a large amount of ammonia water. The steam generated by the ammonia water absorbing heat is recycled after cooling and removing tar. The heat absorbed by the ammonia water cannot be recycled, which loses the energy consumption of cooling the ammonia water heat exchange and consumes a large amount of cooling water resources. There are also problems such as corrosion of high-temperature raw coal gas, condensation of tar, and leakage of heat exchange ammonia water into the carbonization chamber. In addition, the raw coal gas in the coke oven riser is still in a high temperature state, and its own heat dissipation is also likely to cause the temperature of the furnace top platform to be high, and the furnace top working environment is relatively poor, threatening the physical and mental health of workers. Therefore, it is very necessary to design a coke oven riser raw coal gas sensible heat recovery and utilization device. Utility Model Content
[0003] The utility model provides a coke oven riser raw gas sensible heat recovery and utilization device, which is used to solve the problem that the raw gas sensible heat of the coke oven riser part is not fully recovered and utilized in the traditional raw gas cooling process.
[0004] The utility model provides a device for recovering sensible heat of raw coal gas from a coke oven riser, comprising: a riser heat exchanger, a steam-water unit and a water replenishment unit; the water replenishment unit comprises a desalted water tank and a deaerator connected by pipelines, and a desalted water pump is arranged between the desalted water tank and the deaerator; the steam-water unit comprises a steam drum, the deaerator is connected with a water replenishment port of the steam drum through a steam drum feed water pump, the water outlet of the steam drum is connected with a medium inlet of a riser heat exchanger through a forced circulation pump, the medium outlet of the riser heat exchanger is connected with a steam inlet of the steam drum, the steam outlet of the steam drum is connected with a saturated steam pipe network; the steam outlet of the steam drum is also connected with a steam inlet of the deaerator; the raw coal gas inlet of the riser heat exchanger is sealed and connected with the top of a carbonization chamber, and the raw coal gas outlet of the riser heat exchanger is sealed and connected with a bridge pipe; two groups of steam drums are arranged in parallel.
[0005] Preferably, the riser heat exchanger includes an outer tube and an inner tube which are arranged in sequence from the outside to the inside, an intermediate layer is formed between the outer tube and the inner tube, and a spiral coil is arranged in the intermediate layer; the outer tube and the inner tube are coaxially arranged, and the top and bottom of the inner tube are sealedly connected with an upper flange and a lower flange, the upper flange is sealedly connected to the top of the carbonization chamber, and the lower flange is sealedly connected to the bridge pipe.
[0006] Preferably, a spiral, semicircular curved groove is provided on the outer wall of the inner tube, the coil is seamlessly embedded in the curved groove and is tightly attached to the inner tube, and the groove depth of the curved groove is greater than the radius of the coil; the cross section of the inner wall of the inner tube along the axial direction of the inner tube presents a regular wave shape.
[0007] Preferably, the medium in the coil of the riser heat exchanger enters from the bottom and exits from the top, the bottom of the coil is connected to the medium inlet, the top of the coil is connected to the medium outlet, and both the medium inlet and the medium outlet penetrate and extend to the outside of the outer tube.
[0008] Preferably, the riser heat exchanger further comprises a thermal insulation layer and a thermal insulation outer shell, wherein the thermal insulation layer is arranged on the outside of the outer tube, and the thermal insulation outer shell cover is arranged on the outside of the thermal insulation layer; the thermal insulation layer is formed by filling with thermal insulation material.
[0009] Preferably, a plurality of vertically arranged inner fins are provided on the inner wall of the coil along the circumferential direction; the inner fins are staggered and the height of the inner fins is 5 cm.
[0010] Preferably, a plurality of vertically extending heat exchange fins are evenly distributed along the circumferential direction on the inner wall of the inner cylinder; and the height of the heat exchange fins is not higher than the height of the inner cylinder.
[0011] Preferably, a water leakage monitoring element is further provided in the riser heat exchanger; the water leakage monitoring element is installed at the bottom of the middle layer, and the test end of the water leakage monitoring element is located in the cavity of the middle layer and does not contact the coil.
[0012] The sensible heat recovery and utilization device for raw coal gas in the coke oven riser provided by the utility model utilizes a riser heat exchanger to replace a traditional riser, and can cooperate with other equipment such as a steam drum to recover the sensible heat of the raw coal gas, so that saturated water is converted into saturated water vapor, and the saturated water vapor is utilized, and the sensible heat of the raw coal gas in the coke oven riser provided by the utility model is recovered, and the saturated water vapor is converted into the saturated water vapor, and the saturated water vapor is utilized, and the process is reasonable, the construction is convenient, the maintenance is convenient, and the continuous and stable saturated steam can be produced, and the amount of cooling ammonia water in subsequent pipelines such as bridge pipes is reduced, and the energy-saving and consumption-reducing effect is remarkable.
[0013] The riser heat exchanger in the device has high heat exchange efficiency, improves the shape of the outer wall and inner wall of the inner tube, and adopts the mutual cooperation of multiple components such as the coil inner fins and heat exchange fins to intensify the disturbance and turbulence of the raw gas on the inner wall of the inner tube and the saturated water in the coil, thereby increasing the heat exchange area, enhancing the ability of the riser heat exchanger to recover the sensible heat of the coke oven raw gas, improving the energy utilization rate of the coking plant, and reducing the furnace top temperature, improving the working environment, and continuously reducing resource and energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0015] Figure 1 A schematic structural diagram of a coke oven riser raw gas sensible heat recovery and utilization device provided in one embodiment of the utility model;
[0016] Figure 2 A schematic structural diagram of a riser heat exchanger provided in one embodiment of the utility model;
[0017] Figure 3 for Figure 2 A magnified schematic diagram of center A.
[0018] Description of reference numerals:
[0019] 1-riser tube heat exchanger, 2-desalting water tank, 3-deaerator, 4-desalting water pump, 5-steam drum, 6-steam drum feed water pump, 7-forced circulation pump, 11-medium inlet, 12-medium outlet, 13-outer tube, 14-inner tube, 15-coil, 16-upper flange, 17-lower flange, 18-insulation layer, 19-insulation shell, 131-leakage monitoring element, 141-curved groove, 142-heat exchange fins, 151-inner fins. DETAILED DESCRIPTION
[0020] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model is described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the utility model.
[0021] like Figure 1 The utility model provides a coke oven riser raw gas sensible heat recovery and utilization device, comprising: a riser heat exchanger 1, a steam-water unit and a water replenishment unit; the water replenishment unit comprises a desalted water tank 2 and a deaerator 3 connected by pipelines, and a desalted water pump 4 is arranged between the desalted water tank 2 and the deaerator 3; the steam-water unit comprises a steam drum 5, the deaerator 3 is connected with the water replenishment port of the steam drum 5 through a steam drum feed water pump 6, the water outlet of the steam drum 5 is connected with the medium inlet 11 of the riser heat exchanger 1 through a forced circulation pump 7, the medium outlet 12 of the riser heat exchanger 1 is connected with the steam inlet of the steam drum 5, and the steam outlet of the steam drum 5 is connected with the saturated steam pipe network; the steam outlet of the steam drum 5 is also connected with the steam inlet of the deaerator 3; the raw gas inlet of the riser heat exchanger 1 is sealed and connected with the top of the carbonization chamber (not shown in the figure), and the raw gas outlet of the riser heat exchanger 1 is sealed and connected with the bridge pipe (not shown in the figure); two groups of steam drums 5 are arranged in parallel.
[0022] The riser heat exchanger 1 is installed at the original riser position of the coke oven, and the carbonization chamber and the bridge pipe are connected. The desalted water enters the desalted water tank 2, and is sent to the deaerator 3 by the desalted water pump 4 to remove oxygen in the water, and then is sent to the drum 5 by the drum feed water pump 6. The saturated water in the drum 5 is output to the medium inlet 11 of the riser heat exchanger 1 by the forced circulation pump 7. When the raw coal gas from the carbonization chamber in the riser heat exchanger 1 flows through the riser heat exchanger 1, the sensible heat in it is absorbed by the saturated water sent from the drum 5, so that the saturated water is converted into saturated water vapor, and the saturated steam can be continuously generated and sent to the drum 5.
[0023] The saturated steam separated from the steam drum 5 by steam and liquid can enter the deaerator 3 to heat soft water after the flow rate is adjusted by the pressure reducing and regulating valve, or directly enter the saturated steam pipe network for self-use and for downstream users. The saturated water in the steam drum 5 is sent to the riser heat exchanger 1 again through the forced circulation pump 7 to absorb heat, reduce the discharge temperature of the raw gas, and repeat the heat absorption and recovery in this cycle, thereby reducing the amount of cooling ammonia water in the subsequent bridge pipe and other pipelines. While ensuring that the waste heat of the raw gas in the riser is fully absorbed, it is also ensured that the outlet temperature of the raw gas will not be reduced too much to cause the condensation of coal tar vapor and the generation of carbon on the inner wall of the channel. Only the sensible heat of the raw gas is fully recovered and utilized, achieving the purpose of recovering the sensible heat of the raw gas, and the energy-saving and consumption-reducing effect is remarkable.
[0024] When two groups of drums 5 are arranged in parallel, one of the drums 5 can be used as a spare drum 5, which is convenient for maintenance or switching of the drum 5, and also avoids the dry burning of the riser heat exchanger 1 during maintenance, thereby extending the service life of the riser heat exchanger 1. The water level and pressure in the drum 5 and the deaerator 3 are both automatically adjusted and controlled by conventional methods in the art.
[0025] like Figure 2 Preferably, the riser heat exchanger 1 includes an outer tube 13 and an inner tube 14 which are arranged in sequence from the outside to the inside, an intermediate layer is formed between the outer tube 13 and the inner tube 14, and a spiral coil 15 is arranged in the intermediate layer; the outer tube 13 and the inner tube 14 are coaxially arranged, and the top and bottom of the inner tube 14 are sealed and connected with an upper flange 16 and a lower flange 17, the upper flange 16 is sealed and connected to the top of the carbonization chamber (not shown in the figure), and the lower flange 17 is sealed and connected to the bridge pipe (not shown in the figure).
[0026] The riser heat exchanger 1 is provided with an inner tube 14, so that the raw gas flows from bottom to top in the inner tube 14, and exchanges heat with the inner tube 14 and the medium in the coil 15, so that the temperature of the raw gas is reduced to a preset temperature value, and the saturated water in the coil 15 fully absorbs the heat of the raw gas from the inner tube 14, and finally takes out the heat through forced circulation, completing the recovery of the sensible heat of the raw gas. And because the inner tube 14 is sealed with the upper flange 16 and the lower flange 17, the raw gas will not contact the coil 15 in the middle layer, which plays a role in protecting the coil 15. At the same time, in the case of leakage of the coil 15, the inner tube 14 can ensure that the desalted water does not enter the coke oven carbonization chamber, ensuring the normal operation and stability of the coke oven.
[0027] The inner tube 14 can be made of nano-thermal conductive material, which is resistant to high temperature, wear and corrosion, and has a good adjustable thermal conductivity coefficient, which is convenient for protecting the inner tube 14 of the heat exchanger from corrosion by high-temperature raw coal gas; the outer tube 13 is made of stainless steel that is resistant to oxidation and corrosion, and can adapt to the operating environment of the coke oven to the greatest extent; the coil 15 is made of high-temperature and wear-resistant alloy material, is a stress-free spiral coil 15, and is seamlessly embedded in the outer wall of the inner tube 14. There is no additional stress between the coil 15 and the inner tube 14, which ensures the installation reliability of the coil 15 and the inner tube 14.
[0028] like Figure 2 and Figure 3 Preferably, a spiral, semicircular curved groove 141 is provided on the outer wall of the inner tube 14, the coil 15 is seamlessly embedded in the curved groove 141 and is tightly attached to the inner tube 14, the groove depth of the curved groove 141 is greater than the radius of the coil 15; the cross section of the inner wall of the inner tube 14 along the axial direction of the inner tube 14 is a regular wave shape.
[0029] Preferably, the medium in the coil 15 of the riser heat exchanger 1 enters from the bottom and exits from the top, the bottom of the coil 15 is connected to the medium inlet 11, the top of the coil 15 is connected to the medium outlet 12, and both the medium inlet 11 and the medium outlet 12 penetrate and extend to the outside of the outer tube 13.
[0030] In order to further improve the heat exchange effect, the inner wall of the inner tube 14 is wavy in shape without sharp-angle dead zones, so that the flow state of the raw gas near the inner tube 14 changes from laminar flow to turbulent flow, which accelerates the heat exchange rate between the raw gas and the medium, greatly increases the heat transfer coefficient, improves the heat transfer effect and heat exchange efficiency, avoids serious coking on the inner wall of the heat exchanger, and has a higher heat recovery efficiency.
[0031] like Figure 2 Preferably, the riser heat exchanger 1 further includes an insulation layer 18 and an insulation shell 19. The insulation layer 18 is arranged on the outside of the outer tube 13, and the insulation shell 19 is arranged on the outside of the insulation layer 18; the insulation layer 18 is filled with insulation material. The insulation layer 18 is closely attached to the outer wall of the outer tube 13 to ensure that the heat is not dissipated, reduce heat loss, and improve the phenomenon of excessively high surface temperature of the original riser, thereby reducing the operating temperature of the coke oven top. The insulation material of the insulation layer 18 is not limited, and is a conventional setting in the field, such as foam plastics, glass wool, perlite, etc.
[0032] like Figure 3 Preferably, a plurality of vertically arranged inner fins 151 are provided on the inner wall of the coil 15 along the circumferential direction; the inner fins 151 are arranged in a staggered manner, and the height of the inner fins 151 is 5 cm. In order to enhance the heat exchange effect of the coil 15, the inner surface area of the coil 15 is increased by providing the inner fins 151 inside the coil 15, and at the same time, the saturated water in the coil 15 is in a turbulent state, and the heat transfer coefficient is significantly better than the laminar state, thereby achieving the purpose of enhancing the heat transfer effect and improving the heat exchange efficiency. The shape of the inner fins 151 is not particularly limited, and can be straight fins such as serrated type and porous type. The number and density distribution of the inner fins 151 are adjusted by technicians in this field according to the diameter of the coil 15.
[0033] like Figure 2Preferably, on the inner wall of the inner tube 14, there are a plurality of vertically extending heat exchange fins 142 evenly distributed along the circumferential direction; the height of the heat exchange fins 142 is not higher than the height of the inner tube 14. The heat exchange fins 142 arranged on the inner wall of the inner tube 14 can intensify the disturbance and turbulence of the raw gas on the inner wall of the inner tube 14, increase the area of heat exchange to a greater extent, and thus greatly increase the heat exchange effect. The side view of the heat exchange fins 142 can be a right-angled trapezoid or a rectangle (assuming that the inner wall of the inner tube 14 is a smooth wall surface), or other shapes commonly used in the art, which are not specifically limited here, but the shape of the side of the heat exchange fins 142 in contact with the inner tube 14 is also wavy, and is sealed and connected to the inner wall of the inner tube 14 to prevent the formation of gaps between the heat exchange fins 142 and the inner wall of the inner tube 14 to form oil and carbon deposits.
[0034] like Figure 2 Preferably, a water leakage monitoring element 131 is further provided in the riser heat exchanger 1; the water leakage monitoring element 131 is installed at the bottom of the middle layer, and the test end of the water leakage monitoring element 131 is located in the cavity of the middle layer and does not contact the coil 15. When the coil 15 leaks, the water leakage monitoring element 131 can sound an alarm through an interlocked alarm device or control system to remind the operator to handle it, thereby enhancing the safety of equipment operation.
[0035] The present invention is further described in detail below in conjunction with specific embodiments.
[0036] Example 1
[0037] The coke oven riser raw gas sensible heat recovery and utilization device is specifically operated by installing the riser heat exchanger 1 at the original riser position of the coke oven, the upper flange 16 is sealed and connected to the top of the carbonization chamber, and the lower flange 17 is sealed and connected to the bridge pipe, so that the carbonization chamber and the bridge pipe are connected. The desalted water enters the desalted water tank 2, and is sent to the deaerator 3 by the desalted water pump 4 to remove oxygen in the water, and then is sent to the drum 5 by the drum feed water pump 6. The saturated water in the drum 5 is output to the medium inlet 11 of the riser heat exchanger 1 by the forced circulation pump 7, and then enters the coil 15.
[0038] When the raw coal gas from the carbonization chamber in the riser heat exchanger 1 flows from bottom to top through the inner tube 14 of the riser heat exchanger 1, it exchanges heat with the medium in the inner tube 14 and the coil 15, and the sensible heat thereof is absorbed by the saturated water sent from the steam drum 5, so that the saturated water is converted into saturated water vapor, and the saturated steam can be continuously generated and sent into the steam drum 5 through the medium outlet 12.
[0039] The saturated steam separated from the steam drum 5 can enter the deaerator 3 to heat soft water after the flow rate is adjusted by the pressure reducing and regulating valve, or directly enter the saturated steam pipe network for self-use and for downstream users. The saturated water in the steam drum 5 is sent to the riser heat exchanger 1 again through the forced circulation pump 7 to absorb heat, reduce the discharge temperature of the raw gas, and repeat the heat absorption and recovery in this cycle, thereby reducing the amount of cooling ammonia water in the subsequent bridge pipe and other pipelines.
[0040] After the device is operated, the raw gas with a temperature of 700-850℃ at the lower flange 17 of the riser heat exchanger 1 is reduced to ≤450℃ when it is discharged at the upper flange 16. When the saturated water flow rate transported by the steam drum 5 is 2000kg / h, the temperature of the water-steam mixture at the medium outlet 12 is about 221.8℃, and the pressure can reach 2.4MPa.
[0041] Among them, when the riser heat exchanger 1 is in use, a plurality of vertically arranged inner fins 151 are provided on the inner wall of the coil 15 along the circumferential direction, so that the saturated water is in a turbulent state in the coil 15, and the heat transfer coefficient is significantly better than the laminar flow state, thereby achieving the purpose of enhancing the heat transfer effect and improving the heat exchange efficiency.
[0042] When the raw gas flows through the inner tube 14, the heat exchange fins 142 arranged on the inner wall of the inner tube 14 can intensify the disturbance and turbulence of the raw gas on the inner wall of the inner tube 14, increase the heat exchange area to a greater extent, and thus greatly increase the heat exchange effect.
[0043] In addition, a water leakage monitoring element 131 is provided in the cavity of the middle layer. When the coil 15 leaks, an alarm can be sounded through an interlocked alarm device or a control system to remind the operator to handle it, thereby enhancing the safety of equipment operation.
[0044] It should be noted that in the present invention, the detailed structure of some devices is not described in detail, but belongs to the prior art known to those skilled in the art, so it will not be repeated here. In addition, the parts not involved in the device are the same as the prior art or can be implemented by the prior art.
[0045] It should be noted that pressure sensors, flow meters or temperature sensors are installed on the delivery pipelines inside the device between different units and equipment. Different valves are also installed, such as pressure relief valves, pressure regulating valves, safety valves, etc., which are used to adjust and stabilize the pressure of the entire device.
[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it; although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that it is still possible to modify the technical solutions recorded in the aforementioned embodiments, or to replace some or all of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.
Claims
1. A coke oven riser raw gas sensible heat recovery and utilization device, characterized in that: include: Rising tube heat exchanger, steam-water unit and water replenishment unit; the water replenishment unit comprises a desalted water tank and a deaerator connected by pipelines, and a desalted water pump is provided between the desalted water tank and the deaerator; The steam-water unit comprises a steam drum, the deaerator is connected to the water replenishment port of the steam drum through a steam drum feed water pump, the water outlet of the steam drum is connected to the medium inlet of the riser heat exchanger through a forced circulation pump, the medium outlet of the riser heat exchanger is connected to the steam inlet of the steam drum, the steam outlet of the steam drum is connected to the saturated steam pipe network; the steam outlet of the steam drum is also connected to the steam inlet of the deaerator; The raw gas inlet of the riser heat exchanger is sealed and connected to the top of the carbonization chamber, and the raw gas outlet of the riser heat exchanger is sealed and connected to the bridge pipe; two groups of steam drums are arranged in parallel.
2. The coke oven riser raw gas sensible heat recovery and utilization device according to claim 1 is characterized in that: The riser heat exchanger comprises an outer tube and an inner tube which are sequentially arranged from the outside to the inside, an intermediate layer is formed between the outer tube and the inner tube, and a spiral coil is arranged in the intermediate layer; the outer tube and the inner tube are coaxially arranged, the top and bottom of the inner tube are sealed with an upper flange and a lower flange, the upper flange is sealed with the top of the carbonization chamber, and the lower flange is sealed with the bridge pipe; The outer wall of the inner tube is provided with a spiral, semicircular curved groove, the coil is seamlessly embedded in the curved groove and is tightly attached to the inner tube, the groove depth of the curved groove is greater than the radius of the coil; the cross section of the inner wall of the inner tube along the axial direction of the inner tube is in a regular wave shape; The medium in the coil of the riser heat exchanger enters from the bottom and exits from the top. The bottom of the coil is connected to the medium inlet, the top of the coil is connected to the medium outlet, and both the medium inlet and the medium outlet penetrate and extend to the outside of the outer tube.
3. The coke oven riser raw gas sensible heat recovery and utilization device according to claim 2 is characterized in that: The riser heat exchanger further comprises a heat-insulating layer and a heat-insulating outer shell. The heat-insulating layer is arranged on the outside of the outer tube, and the heat-insulating outer shell cover is arranged on the outside of the heat-insulating layer. The heat-insulating layer is formed by filling with heat-insulating material.
4. The coke oven riser raw gas sensible heat recovery and utilization device according to claim 2, characterized in that: A plurality of vertically arranged inner fins are arranged on the inner wall of the coil along the circumferential direction; the inner fins are staggered and the height of the inner fins is 5 cm.
5. The coke oven riser raw gas sensible heat recovery and utilization device according to claim 2, characterized in that: On the inner wall of the inner cylinder, a plurality of vertically extending heat exchange fins are evenly distributed along the circumferential direction; the height of the heat exchange fins is not higher than the height of the inner cylinder.
6. The coke oven riser raw gas sensible heat recovery and utilization device according to any one of claims 2 to 5, characterized in that: The riser heat exchanger is also provided with a water leakage monitoring element; the water leakage monitoring element is installed at the bottom of the middle layer, and the test end of the water leakage monitoring element is located in the cavity of the middle layer and does not contact the coil.