Coke-oven gas waste heat recovery device

Abstract

The invention relates to the technical field of coke oven waste heat recovery, in particular to a coke oven gas waste heat recovery device which comprises an ascending pipe and a bridge pipe fixedly installed at the top of the ascending pipe, the ascending pipe comprises an external steel pipe and an internal lining, the ascending pipe is installed on a coke oven, coke oven gas passes through the ascending pipe, the bridge pipe is located at the top of the ascending pipe, and the lining is arranged on the bridge pipe. A water seal cover is installed at the top of the bridge pipe and used for keeping sealing, a combined pipeline comprises a plurality of spiral pipes which are sequentially installed from top to bottom, the spiral pipes are connected through the combined pipeline and a quick connector composed of a quick connector son body and a quick connector mother body which can be separated, so that a spiral heat absorption whole is formed, and waste heat collection is completed. In the aspects of fault maintenance and decoking, the required independent spiral pipe can be disassembled according to requirements, so that the maintenance difficulty is greatly reduced; and meanwhile, the position and the distribution density of the spiral pipe can be controlled when the temperature is changed in cooperation with the installation assembly capable of being hydraulically controlled so as to adapt to the temperature change period.

Description

Technical Field

[0001] This invention relates to the field of coking oven waste heat recovery technology, specifically to a coking oven gas waste heat recovery device. Background Technology

[0002] Waste heat recovery from coke oven gas (including raw coal gas and clean coal gas) is a core aspect of energy conservation and consumption reduction in the coking industry. The corresponding equipment can be divided into dedicated core equipment and auxiliary heat exchange equipment based on the form of waste heat (sensible heat / latent heat), recovery stage (cooling of raw coal gas, combustion of clean coal gas) and purpose (steam production, preheating, power generation).

[0003] Chinese patent application number CN202311473365.1 discloses a dual-coil riser heat exchanger with enhanced heat transfer effect, comprising: a riser body with an upper flange fixedly installed on its upper outer side; an inner sleeve inside the riser body; a heat exchanger body inside the inner sleeve; a water outlet at the upper front side of the heat exchanger body; and a water inlet at the lower front side of the heat exchanger body; an auxiliary component installed inside the inner sleeve and located inside the heat exchanger body; the auxiliary component includes a first mounting plate, a support block, a fixing plate, heat-conducting fins, fixing bolts, and threaded holes; and an upper fixing ring installed at the upper inner end of the riser body. This dual-coil riser heat exchanger has a good disturbance function for the raw coal gas entering the riser body, which facilitates the improvement of the overall enhanced heat transfer effect. At the same time, it can assist in heat conduction through heat-conducting fins, avoiding the overall heat conduction structure being monolithic.

[0004] The riser pipe is an auxiliary device for coke ovens, installed at the riser pipe opening on the top of the coke oven, used to vent crude gas from the carbonization chamber. Coke oven raw gas is a crucial component in coke oven gas waste heat recovery. Firstly, the temperature of coke oven raw gas is high, typically reaching 650 to 800 degrees Celsius within the riser pipe, and exhibits significant periodic variations, with extreme temperatures exceeding 1300 degrees Celsius. This high temperature and large periodic variations are the main challenges in the waste heat recovery process. Furthermore, it contains various corrosive media, which can easily lead to water leakage within the riser pipe. If this water enters the carbonization chamber, it will damage the furnace body. Therefore, waste heat recovery within the riser pipe is severely limited. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a coke oven gas waste heat recovery device, which can effectively solve the problem of how the existing technology deals with the high temperature and large periodic variation of coke oven raw gas.

[0006] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a coke oven gas waste heat recovery device, including a riser pipe and a bridge pipe fixedly installed on top of the riser pipe. The riser pipe includes an outer steel pipe and an inner bushing. The riser pipe is installed on a coke oven, and coke oven gas passes through the riser pipe. The bridge pipe is located at the top of the riser pipe, and a water seal cover is installed on the top of the bridge pipe to maintain a seal. The device also includes: The combined pipeline includes multiple spiral tubes installed vertically. The top of the uppermost spiral tube is fixedly connected to a liquid outlet pipe, which is located outside the riser pipe and serves as the liquid outlet. The bottom of the lowermost spiral tube is fixedly connected to a liquid inlet pipe, which is located outside the riser pipe and serves as the liquid inlet. The mounting assembly includes multiple connecting pipes corresponding to the spiral tube. The connecting pipes are installed inside the riser tube and are arranged vertically. The connecting pipes are arranged in pairs and symmetrically distributed on both sides of the spiral tube. A clamping hoop corresponding to the spiral tube is fixedly connected to the connecting pipe for fixing the spiral tube. The bottom mounting bracket, located at the bottom of the riser tube, is used to connect the two sets of mounting components.

[0007] Furthermore, the installation assembly also includes a second limiting slide rail horizontally rotatably connected within the riser pipe bushing and a second sleeve-type compensator fixedly connected between the connecting pipes. Two sliders are fixedly sleeved on the connecting pipe, and the sliders are slidably mounted on the second limiting slide rail. The top and bottom ends of the second sleeve-type compensator are fixedly connected to connecting plates. A piston rod is fixedly connected to the top or bottom of the two connecting plates. A hydraulic cylinder is slidably sleeved on the piston rod. The middle of the inner wall of the hydraulic cylinder has a partition, and a hydraulic conduit is fixedly connected through the hydraulic cylinder. The ends of the hydraulic conduit are respectively located above and below the hydraulic cylinder, and the ends of the hydraulic conduit extend to the outside of the riser pipe and communicate with an external hydraulic source. A first sleeve-type compensator is also fixedly connected between the uppermost spiral pipe and the outlet pipe.

[0008] Furthermore, the combined pipeline also includes a sleeve-type compensator fixedly connected to the top of the spiral pipe. A quick-connect fitting body is fixedly connected to the top of the sleeve-type compensator, and a quick-connect fitting daughter body corresponding to the quick-connect fitting body is fixedly connected to the bottom of the spiral pipe. The quick-connect fitting body and the quick-connect fitting daughter body are connected to each other to connect the two spiral pipes.

[0009] Furthermore, the combined pipeline also includes a limiting slide rail that is vertically fixed inside the riser pipe bushing. The quick connector body and quick connector daughter body are covered with heat-insulating clamps. The heat-insulating clamps have heat-insulating material on their inner side to protect the quick connector body and quick connector daughter body. The sleeve-type compensator is covered with a compensator clamp. Both the heat-insulating clamp and the compensator clamp are slidably mounted on the limiting slide rail via a sliding seat.

[0010] Furthermore, the clamping clamp includes an upper clamping block located below the spiral pipe and an upper clamping block located above the spiral pipe, and the lower clamping block and the upper clamping block are fixedly connected by bolts.

[0011] Furthermore, the water seal cover is horizontally rotatably installed on the top of the bridge pipe, the connecting pipe is a hollow pipe and multiple steam pipes are fixedly connected through it, a coke cleaning groove is opened in the lower clamp block, a coke cleaning nozzle is fixedly connected through the coke cleaning groove, and the bottom end of the coke cleaning nozzle is fixedly connected to the steam pipe.

[0012] Furthermore, a steam connecting pipe is fixedly connected to the top of the uppermost connecting pipe. The top of the steam connecting pipe penetrates the water seal cover and extends above the water seal cover. A sealing sleeve is fixedly fitted over the steam connecting pipe. The sealing sleeve is located at the connection between the steam connecting pipe and the water seal cover. Multiple connecting rods are fixedly connected between the two steam connecting pipes and the symmetrically distributed connecting pipes to assist in fixing the two sets of connecting pipes and the two steam connecting pipes.

[0013] Furthermore, the bottom fixing frame includes an annular mounting frame rotatably mounted below the riser tube bushing. Two fixing posts corresponding to the connecting tube are symmetrically fixedly connected to the annular mounting frame. A fixing sleeve is fixedly connected to the top of each fixing post, and the fixing sleeve is used to fix the fixing post to the connecting tube.

[0014] The technical solution provided by this invention has the following advantages compared with the known prior art: 1. By adopting a combined pipeline, multiple spiral tubes are connected by quick-connect couplings consisting of separable quick-connect sub-body and quick-connect mother body to form a spiral heat absorption whole, thus completing the collection of waste heat. In terms of fault repair and descaling, individual spiral tubes can be disassembled as needed, greatly reducing maintenance difficulty. At the same time, with the hydraulically controllable installation components, the position and distribution density of the spiral tubes can be controlled when the temperature changes, so as to adapt to the temperature change cycle and ensure the effect of waste heat recovery.

[0015] 2. By injecting high-pressure steam below the spiral tube, a high-pressure steam atmosphere can be quickly formed inside the riser tube to aid in the coking process. The high-pressure steam injection position is below the spiral tube, which can be coordinated with the reverse flow of raw coal gas to help diffuse the high-pressure steam. Furthermore, through the horizontal rotation connection between the limit slide rail one and limit slide rail two and the riser tube, the high-pressure steam can perform coking removal below the spiral tube in a reciprocating circular motion, thus improving the coking removal effect. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the combined pipeline of the present invention; Figure 4 This is a schematic diagram of the connection and separation of the spiral tube according to the present invention; Figure 5 This is a schematic diagram of the connection between the combined pipe and the installation components of the present invention; Figure 6 This is a schematic diagram showing the connection between the limiting slide rail and the heat insulation clamp and the compensator clamp of the present invention; Figure 7 This is a schematic diagram of the installation components of the present invention; Figure 8 This is a schematic diagram of the installation component structure of the present invention; Figure 9 This is a schematic diagram of the internal structure of the hydraulic cylinder of the present invention; Figure 10 This is a schematic diagram showing the connection between the connecting pipe and the steam communication pipe of the present invention; Figure 11 This is a schematic diagram of the clamping hoop of the present invention; Figure 12 This is a schematic diagram showing the connection between the water seal cap and the steam communication pipe of the present invention; Figure 13 This is a schematic diagram of the bottom fixing frame of the present invention.

[0018] The labels in the diagram represent: 1. Ascending pipe; 2. Bridge pipe; 3. Combined pipe; 301. Spiral pipe; 302. Sleeve-type compensator one; 303. Quick coupling body; 304. Thermal clamp; 305. Liquid outlet pipe; 306. Liquid inlet pipe; 307. Limiting slide rail one; 308. Quick coupling body; 309. Compensator clamp; 4. Installation assembly; 401. Limiting slide rail two; 402. Connecting pipe; 403. Clamping clamp; 4031. Lower clamp. 4032. Upper clamp block; 4033. Coke cleaning nozzle; 4034. Steam pipe; 4035. Coke cleaning trough; 404. Sliding block; 405. Sleeve-type compensator II; 406. Hydraulic cylinder; 407. Connecting plate; 408. Piston rod; 409. Hydraulic conduit; 410. Steam connecting pipe; 411. Sealing sleeve; 412. Connecting rod; 5. Water seal cover; 6. Bottom fixing bracket; 601. Annular mounting bracket; 602. Fixing column; 603. Fixing sleeve. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] The present invention will be further described below with reference to embodiments.

[0021] Reference Figures 1 to 13 Example: A coke oven gas waste heat recovery device includes a riser pipe 1 and a bridge pipe 2 fixedly installed on top of the riser pipe 1. The riser pipe 1 includes an outer steel pipe and an inner bushing. The riser pipe 1 is installed on a coke oven, and the coke oven gas passes through the riser pipe 1. The bridge pipe 2 is located on top of the riser pipe 1, and a water seal cover 5 is installed on the top of the bridge pipe 2. The water seal cover 5 is horizontally rotatable on the top of the bridge pipe 2 to maintain a seal. The device also includes: The combined pipe 3 includes multiple spiral pipes 301 installed vertically. The top end of the uppermost spiral pipe 301 is fixedly connected to a liquid outlet pipe 305, which is located outside the riser pipe 1 and serves as a liquid outlet. The bottom end of the lowermost spiral pipe 301 is fixedly connected to a liquid inlet pipe 306, which is located outside the riser pipe 1 and serves as a liquid inlet. The mounting component 4 includes multiple connecting pipes 402 corresponding to the spiral tube 301. The connecting pipes 402 are installed inside the riser tube 1. The connecting pipes 402 are distributed vertically in sequence. The connecting pipes 402 are arranged in pairs and symmetrically distributed on both sides of the spiral tube 301. A clamping hoop 403 corresponding to the spiral tube 301 is fixedly connected to the connecting pipe 402 for fixing the spiral tube 301. The bottom mounting bracket 6, located at the bottom of the riser tube 1, is used to connect the two sets of mounting components 4.

[0022] Ascending pipe 1 is installed at the ascending pipe inlet on the top of the coke oven. It is an auxiliary equipment of the coke oven that vents the crude coal gas in the carbonization chamber. The water seal cover 5 installed on the bridge pipe 2 is used to prevent the crude coal gas from overflowing and polluting the atmosphere. Ammonia water nozzles are installed at the bends of the bridge pipe 2. The hot ammonia water sprayed out is used to cool the crude coal gas by means of ammonia water evaporation. Generally speaking, the raw coal gas passing through ascending pipe 1 has a large amount of heat. In waste heat recovery, most of the heat of the raw coal gas is collected and utilized in ascending pipe 1. The heat distribution of raw coal gas has the following characteristics: the temperature variation range is from 600℃ to 1400℃, and the variation period is uncertain.

[0023] The connecting pipe 402 is assembled with the spiral pipe 301. Two symmetrical connecting pipes 402 are required for each spiral pipe 301, and multiple clamping clamps 403 are fixed on the connecting pipe 402, corresponding to the number of pipe turns on the spiral pipe 301, so as to form a firm fixing effect on the spiral pipe 301. The combined pipe 3 and the installation component 4 are assembled in sequence from top to bottom. After the assembly is completed, the liquid inlet pipe 306 supplies demineralized water or organic heat carrier (hereinafter referred to as liquid flow) from below the combined pipe 3. The liquid flow absorbs the sensible heat of the raw coal gas in the riser pipe 1, and after passing through the uppermost spiral pipe 301, it flows to the outside of the riser pipe 1 through the liquid outlet pipe 305, thereby completing the collection of waste heat.

[0024] The assembled, multi-segment spiral tube 301 can be separated from the external liquid outlet pipe 305 and liquid inlet pipe 306, and can also be separated from each other. Therefore, when tar adheres to the spiral tube 301 and cannot be cleaned by high-pressure steam, the required spiral tube 301 can be replaced by disassembly, and that segment of the spiral tube 301 can be cleaned. Alternatively, if a segment of the spiral tube 301 leaks, it can be replaced as needed. After replacing with a new spiral tube 301, operation can continue. Unlike existing spiral pipes, which are integrally formed and have a relatively fixed relationship with the riser pipe 1, this design allows for daily... Regular descaling and maintenance are essential to maintain the normal operation of spiral pipes. However, if leaks or stubborn tar buildup occur, the entire spiral pipe must be disassembled for repair or cleaning, which is difficult, time-consuming, and costly. The modular pipe 3, which is assembled in sections, can solve these problems. By disassembling a section of the spiral pipe 301, the disassembly difficulty is reduced. Furthermore, since the segmented spiral pipe 301 is smaller, it can be quickly replaced after disassembly, thereby reducing downtime. The repaired spiral pipe 301 can then be replaced again.

[0025] Spiral tube 301 can also be equipped with spiral fins on the outside to increase the contact area with raw coal gas and help improve heat exchange efficiency.

[0026] Specifically, the installation assembly 4 also includes a second limiting slide rail 401 horizontally rotatably connected within the bushing of the riser pipe 1 and a second sleeve compensator 405 fixedly connected between the connecting pipes 402. Two sliders 404 are fixedly sleeved on the connecting pipes 402, and the sliders 404 are slidably mounted on the second limiting slide rail 401. The top and bottom ends of the second sleeve compensator 405 are fixedly connected to connecting plates 407. The top or bottom of the two connecting plates 407 are fixedly connected to piston rods 408. A hydraulic cylinder 406 is slidably sleeved on the piston rods 408. The middle of the inner wall of the hydraulic cylinder 406 has a partition, and a hydraulic conduit 409 is fixedly connected through the hydraulic cylinder 406. The ends of the hydraulic conduit 409 are respectively located above and below the hydraulic cylinder 406, and the ends of the hydraulic conduit 409 extend to the outside of the riser pipe 1 and are connected to an external hydraulic source. A first sleeve compensator 302 is also fixedly connected between the uppermost spiral pipe 301 and the outlet pipe 305.

[0027] Spiral tube 301 and connecting tube 402 are supplied as a set, with the connecting tube 402 being identical to the spiral tube 301. Multiple connecting tubes 402 are installed sequentially, and a sleeve-type compensator 405 connects the upper and lower connecting tubes 402, allowing for adjustment between them. Generally, raw coal gas flows from bottom to top through riser 1. The raw coal gas below riser 1 has the highest temperature because it has not undergone heat absorption by spiral tube 301. Therefore, when the temperature rises, the heat absorption demand below riser 1 is higher. External hydraulic pressure can be conducted through hydraulic conduit 409, and the piston rod 408 is driven by hydraulic pressure to slide towards the middle of hydraulic cylinder 406. This causes the connecting tubes 402 at the upper and lower ends of the sleeve-type compensator 405 to move closer together, shortening the distance between each connecting tube 402, thus increasing the density between spiral tubes 301. Furthermore, because it is located at the bottom... The connecting pipe 402 of the part is fixed to the bottom fixing frame 6. Therefore, when each spiral pipe 301 approaches each other, all spiral pipes 301 will descend to increase the density of spiral pipes 301 below the riser pipe 1, which can absorb more heat below the riser pipe 1 to cope with the situation where the heat absorption demand below the riser pipe 1 is higher when the temperature rises. When the temperature drops, hydraulic conduit 409 is also needed to transmit hydraulic pressure and control multiple spiral pipes 301 to return to their original positions to increase the length of heat absorption. In this way, the cycle of temperature change can be coped with. When the temperature rises, the residual heat absorption is concentrated on the area below the riser pipe 1. After the temperature drops, the length of residual heat absorption is restored. Moreover, the hydraulic source is external. After the heat insulation material is set on the outside of the hydraulic conduit 409, the physical properties of the hydraulic oil can be guaranteed, and the hydraulic transmission effect can be guaranteed.

[0028] When the spiral tubes 301 approach each other, the sleeve-type compensator 302 between the uppermost spiral tube 301 and the outlet pipe 305 is stretched. When the distance between the spiral tubes 301 increases, the sleeve-type compensator 302 between the uppermost spiral tube 301 and the outlet pipe 305 is compressed. Since the distance between multiple spiral tubes 301 needs to be compensated by the sleeve-type compensator 302 between the outlet pipe 305 and the spiral tube 301 after the spiral tubes 301 approach each other, the sleeve-type compensator 302 between the spiral tube 301 and the outlet pipe 305 needs to have a longer stroke.

[0029] Specifically, the combined pipeline 3 includes a sleeve-type compensator 302 fixedly connected to the top of the spiral pipe 301. A quick-connect mother body 303 is fixedly connected to the top of the sleeve-type compensator 302, and a quick-connect daughter body 308 corresponding to the quick-connect mother body 303 is fixedly connected to the bottom of the spiral pipe 301. The quick-connect mother body 303 and the quick-connect daughter body 308 are connected to each other to connect the two spiral pipes 301. The combined pipeline 3 also includes a limiting slide rail 307 vertically fixedly installed in the bushing of the riser pipe 1. The quick-connect mother body 303 and the quick-connect daughter body 308 are covered with a heat-insulating clamp 304. The heat-insulating clamp 304 has heat-insulating material on its inner side to protect the quick-connect mother body 303 and the quick-connect daughter body 308. The sleeve-type compensator 302 is covered with a compensator clamp 309. Both the heat-insulating clamp 304 and the compensator clamp 309 are slidably installed on the limiting slide rail 307 through a sliding seat.

[0030] Multiple spiral pipes 301 are connected by a quick-connect coupling formed by a quick-connect body 303 and a quick-connect body 308. To protect the quick-connect body 303 and the quick-connect body 308, the heat insulation material inside the heat-insulating clamp 304 is used to isolate external heat and prevent the quick-connect body 303 and the quick-connect body 308 from overheating and causing seal failure. When connecting the spiral pipes 301, the quick-connect body 308 at the bottom of the spiral pipe 301 is inserted into the quick-connect body 303 at the top of the sleeve-type compensator 302 and fixed in place. To form a seal, the thermal insulation clamp 304 is then clamped to the outside of the quick connector body 303 and the quick connector daughter body 308 using bolts. Next, the thermal insulation clamp 304 is fixed to the slide seat of the limiting slide rail 307 using bolts. The compensator clamp 309 on the outside of the sleeve compensator 302 also needs to be fixed to the slide seat of the limiting slide rail 307 by bolts. This ensures that when the distance between the spiral tubes 301 is shortened, the connection of the quick connector daughter body 308 will not restrict the movement between the two.

[0031] The heat-insulating clamp 304 can be filled with rock wool material of moderate hardness and covered with an aluminum foil reflective layer. It adopts a combination structure of overlapping and tongue and groove to reduce high-temperature radiation heat transfer and heat convection through the gaps, so as to ensure that the combination of quick connector mother body 303 and quick connector daughter body 308 can be used normally in high-temperature environment. Correspondingly, this heat-insulating design can be used at the connection of connecting pipe 402 and other pipes to prevent leakage at the pipe welded connection under high-temperature conditions.

[0032] Specifically, the clamping ring 403 includes a lower clamping block 4031 located below the spiral pipe 301 and an upper clamping block 4032 located above the spiral pipe 301. The lower clamping block 4031 and the upper clamping block 4032 are fixedly connected by bolts. The water seal cover 5 is horizontally rotatably installed on the top of the bridge pipe 2. The connecting pipe 402 is a hollow pipe and is fixedly connected to multiple steam pipes 4034. A coke-removing groove 4035 is opened inside the lower clamping block 4031, and a coke-removing nozzle 4033 is fixedly connected through the coke-removing groove 4035. The bottom of the coke-removing nozzle 4033... The end is fixedly connected to the steam pipe 4034. The top of the uppermost connecting pipe 402 is fixedly connected to the steam connecting pipe 410. The top of the steam connecting pipe 410 passes through the water seal cover 5 and extends above the water seal cover 5. A sealing sleeve 411 is fixedly fitted on the outside of the steam connecting pipe 410. The sealing sleeve 411 is located at the connection between the steam connecting pipe 410 and the water seal cover 5. Multiple connecting rods 412 are fixedly connected between the two steam connecting pipes 410 and the symmetrically distributed connecting pipes 402 to assist in fixing the two sets of connecting pipes 402 and the two steam connecting pipes 410.

[0033] The spiral tube 301 is fixed by clamping with corresponding lower clamping blocks 4031 and upper clamping blocks 4032, and secured with bolts. During online coking, the coke oven continues to operate. High-pressure steam enters the connecting pipe 402 through the steam connecting pipe 410, passes through multiple connecting pipes 402 and the sleeve-type compensator 405 between the multiple connecting pipes 402, and then enters the steam pipe 4034. High-pressure steam is released below the spiral tube 301 using the coking nozzle 4033. The high-pressure steam can be quickly released in the riser pipe 1 through multiple coking nozzles 4033. Furthermore, following the flow direction of the raw coal gas in the riser pipe 1, it flows from bottom to top, covering the outside of the spiral pipe 301 to achieve rapid coverage by high-pressure steam, enabling rapid coking removal. Most of the existing coking removal ports are distributed at the flange connecting the riser pipe 1 and the bridge pipe 2. After high-pressure steam is introduced, a high-pressure steam atmosphere is formed in the riser pipe 1 to achieve coking removal. Multiple coking removal nozzles 4033 are located below the spiral pipe 301, which can quickly cover the area below the spiral pipe 301, where tar solidification is prone to occur, with high-pressure steam, which can accelerate the coking removal speed and improve the coking removal effect to a certain extent.

[0034] The water seal cover 5 can be rotatably mounted on top of the bridge tube 2 via a bearing or a ball bearing. The difference lies in the position of the rotating connection. With a ball bearing, the water seal cover 5 is placed on top of the bridge tube 2 and rotates. A bearing, however, places higher demands on the connection between the bridge tube 2 and the water seal cover 5 and has less impact on the seal. However, it is more difficult to disassemble and maintain than the ball bearing method. The choice can be made depending on the situation. The rotation of the water seal cover 5 allows the steam connecting pipe 410 and the connecting pipe 402 to rotate approximately 180° during online descaling. The rotation is centered on the center of the water seal cover 5, with the rotation point on the left and right. The rightward reciprocating rotation of nearly 90° is beneficial for increasing the direct contact between the high-pressure steam and the spiral tube 301 when the high-pressure steam is ejected from the descaling nozzle 4033, thus helping to improve the descaling effect. The rotation of the water seal cover 5 can be driven by a motor, and the driving speed of this rotation should be slow rather than fast. Since the limiting slide rail 307 is located between the two connecting pipes 402, the steam connecting pipe 410 and the connecting pipe 402 can first rotate counterclockwise to nearly 90° and then clockwise to nearly 90° to complete the reciprocating motion. During the entire descaling process, there is no need for a long reciprocating motion, and it can be adjusted according to the tar adhesion and usage cycle.

[0035] Specifically, the bottom mounting bracket 6 includes an annular mounting bracket 601 rotatably mounted below the bushing of the riser pipe 1. Two fixing posts 602 corresponding to the connecting pipe 402 are symmetrically fixedly connected on the annular mounting bracket 601. A fixing sleeve 603 is fixedly connected to the top of the fixing post 602. The fixing sleeve 603 is used to fix the fixing post 602 to the connecting pipe 402.

[0036] When assembling the connecting pipe 402 and the spiral pipe 301, the two bottom connecting pipes 402 need to be fixed to the top of the fixing post 602, and the connection between the connecting pipe 402 and the fixing post 602 is fixed by the fixing sleeve 603, so as to determine the position of the connecting pipe 402 and fix the connecting pipe 402.

[0037] Sleeve-type compensators, including Sleeve-type Compensator 1 (302) and Sleeve-type Compensator 2 (405), are composed of inner and outer sleeves. The two inner sleeves slide within the sealed stuffing box. Flexible graphite packing is the highest temperature choice and is commonly used in high-temperature and high-pressure steam pipelines.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A coke oven gas waste heat recovery device, comprising a riser pipe (1) and a bridge pipe (2) fixedly installed on the top of the riser pipe (1), the riser pipe (1) comprising an outer steel pipe and an inner bushing, the riser pipe (1) being installed on a coke oven, coke oven gas passing through the riser pipe (1), the bridge pipe (2) being located on top of the riser pipe (1), and a water seal cap (5) being installed on the top of the bridge pipe (2) for maintaining a seal, characterized in that, Also includes: The combined pipe (3) includes multiple spiral pipes (301) installed vertically in sequence. The top of the uppermost spiral pipe (301) is fixedly connected to a liquid outlet pipe (305), and the liquid outlet pipe (305) is located outside the riser pipe (1) as a liquid outlet. The bottom of the lowermost spiral pipe (301) is fixedly connected to a liquid inlet pipe (306), and the liquid inlet pipe (306) is located outside the riser pipe (1) as a liquid inlet. The mounting assembly (4) includes multiple connecting pipes (402) corresponding to the spiral tube (301). The connecting pipes (402) are installed inside the riser tube (1). The connecting pipes (402) are arranged vertically. The connecting pipes (402) are arranged in pairs and symmetrically distributed on both sides of the spiral tube (301). The connecting pipes (402) are fixedly connected with clamping hoops (403) corresponding to the spiral tube (301) for fixing the spiral tube (301). The bottom mounting bracket (6) is located at the bottom of the riser tube (1) and is used to connect the two sets of mounting components (4).

2. The coke oven gas waste heat recovery device according to claim 1, characterized in that, The installation assembly (4) further includes a second limiting slide rail (401) horizontally rotatably connected within the bushing of the riser pipe (1) and a second sleeve-type compensator (405) fixedly connected between the connecting pipe (402). Two sliders (404) are fixedly sleeved on the connecting pipe (402), and the sliders (404) are slidably mounted on the second limiting slide rail (401). The top and bottom ends of the second sleeve-type compensator (405) are fixedly connected to connecting plates (407), and piston rods (408) are fixedly connected to the top or bottom of the two connecting plates (407). The piston rod (408) is slidably sleeved with a hydraulic cylinder (406). The hydraulic cylinder (406) has a partition in the middle of its inner wall. A hydraulic conduit (409) is fixedly connected through the hydraulic cylinder (406). The ends of the hydraulic conduit (409) are located above and below the hydraulic cylinder (406), and the ends of the hydraulic conduit (409) extend to the outside of the riser pipe (1) and are connected to an external hydraulic source. A sleeve-type compensator (302) is also fixedly connected between the uppermost spiral pipe (301) and the liquid outlet pipe (305).

3. The coke oven gas waste heat recovery device according to claim 2, characterized in that, The combined pipe (3) also includes a sleeve-type compensator (302) fixedly connected to the top of the spiral pipe (301). The top of the sleeve-type compensator (302) is fixedly connected to a quick connector mother body (303), and the bottom of the spiral pipe (301) is fixedly connected to a quick connector daughter body (308) corresponding to the quick connector mother body (303). The quick connector mother body (303) and the quick connector daughter body (308) are connected to each other to connect the two spiral pipes (301).

4. The coke oven gas waste heat recovery device according to claim 3, characterized in that, The combined pipeline (3) also includes a limiting slide rail (307) that is vertically fixed inside the bushing of the riser pipe (1). The quick connector mother body (303) and quick connector daughter body (308) are covered with a heat-insulating clamp (304). The heat-insulating clamp (304) has heat-insulating material on its inner side to protect the quick connector mother body (303) and quick connector daughter body (308). The sleeve-type compensator (302) is covered with a compensator clamp (309). The heat-insulating clamp (304) and the compensator clamp (309) are both slidably mounted on the limiting slide rail (307) through a sliding seat.

5. A coke oven gas waste heat recovery device according to claim 2, characterized in that, The clamping band (403) includes a lower clamping block (4031) located below the spiral pipe (301) and an upper clamping block (4032) located above the spiral pipe (301), and the lower clamping block (4031) and the upper clamping block (4032) are fixedly connected by bolts.

6. A coke oven gas waste heat recovery device according to claim 5, characterized in that, The water seal cover (5) is horizontally rotated and installed on the top of the bridge pipe (2). The connecting pipe (402) is a hollow pipe and is fixedly connected to multiple steam pipes (4034). A coke cleaning groove (4035) is opened in the lower clamp block (4031). A coke cleaning nozzle (4033) is fixedly connected in the coke cleaning groove (4035). The bottom end of the coke cleaning nozzle (4033) is fixedly connected to the steam pipe (4034).

7. A coke oven gas waste heat recovery device according to claim 6, characterized in that, A steam connecting pipe (410) is fixedly connected to the top of the uppermost connecting pipe (402). The top end of the steam connecting pipe (410) passes through the water seal cover (5) and extends above the water seal cover (5). A sealing sleeve (411) is fixedly fitted on the outside of the steam connecting pipe (410). The sealing sleeve (411) is located at the connection between the steam connecting pipe (410) and the water seal cover (5). Multiple connecting rods (412) are fixedly connected between the two steam connecting pipes (410) and the symmetrically distributed connecting pipes (402) to assist in fixing the two sets of connecting pipes (402) and the two steam connecting pipes (410).

8. A coke oven gas waste heat recovery device according to claim 1, characterized in that, The bottom fixing frame (6) includes an annular mounting frame (601) rotatably mounted below the bushing of the riser pipe (1). Two fixing posts (602) corresponding to the connecting pipe (402) are symmetrically fixedly connected on the annular mounting frame (601). A fixing sleeve (603) is fixedly connected to the top of the fixing post (602). The fixing sleeve (603) is used to fix the fixing post (602) to the connecting pipe (402).

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