A staggered arrangement of dry coke quenching devices with enhanced heat exchange function

Abstract

The present invention discloses a dry quenching device with staggered arrangement and enhanced heat exchange function, the device comprises a plurality of heat exchange bodies, the heat exchange tubes or heat exchange plates in the plurality of heat exchange bodies are staggered up and down, an anti-blocking gas collection and recovery device is provided on the upper part of the device, a "fishbone-shaped" gas distribution / spraying structure is provided between the plurality of heat exchange bodies, and an anti-wear protective umbrella is provided on the upper part of the "fishbone-shaped" gas distribution / spraying structure. The device is provided with staggered material channels, combined with unique gas distribution / spraying structural components, which can improve the heat exchange effect between the material and the heat exchange body, thereby greatly reducing equipment investment; with the improvement of the heat exchange effect, the semi-coke is thoroughly cooled, and the hidden danger of fire in the semi-coke bin / material yard is eliminated. The unique anti-blocking gas collection and recovery device arranged on the top realizes the environmentally friendly, safe and long-term production and operation of the pyrolysis device; the present invention is not only applicable to components inside the furnace, but also to solving pipelines and equipment outside the furnace, and completely solves the blockage problem.

Description

Technical Field

[0001] The invention relates to a coke dry quenching device, in particular to a coke dry quenching device with staggered arrangement and enhanced heat exchange function, belonging to the technical field of coal chemical industry and atmospheric environmental protection. Background Art

[0002] At present, the existing dry coke quenching devices of pyrolysis furnaces all adopt the form of water-cooled walls. The semi-coke exchanges heat with water indirectly during the falling process, thereby realizing the cooling of the semi-coke. However, due to concerns about blockage, the width of the material channel is relatively large, and the heat exchange effect of the semi-coke at the center of the material channel is the worst. Due to the poor heat exchange effect of the heat exchange device, the material after heat exchange is prone to ignition. Therefore, many companies spray water to cool down at the coke outlet position, which in turn causes the problem of poor environment at the bottom of the furnace body. In addition, a large amount of steam will also flow into the upper part of the pyrolysis furnace body, and a large amount of steam will enter the purification system together with the pyrolysis gas of the pyrolysis furnace, which will not only affect the calorific value of the pyrolysis gas, but also accelerate the blockage of the pyrolysis gas collection flue. In addition, since the pyrolysis furnace is operated at positive pressure, the semi-coke will carry a large amount of dust and coal gas in the process of being discharged from the furnace, which not only affects the environment but also poses a huge safety hazard. Therefore, the pyrolysis furnace urgently needs a device that has high heat exchange efficiency and effect and can achieve clean production.

[0003] CN114317988A discloses a device and method for recovering sensible heat of magnesium slag, wherein the magnesium slag raw material passes through the evaporation section cold slag box, the heating section cold slag box and the cold slag machine from top to bottom in sequence, and the water supply pipe is connected to the heating section cold slag box, the water guide pipe and the boiler drum in sequence, the boiler drum and the evaporation section cold slag box are connected through the downcomer and the lead-out pipe, and at the same time, the boiler drum, the downcomer, the evaporation section cold slag box and the lead-out pipe form an evaporation circulation loop, and a steam outlet is provided at the top of the boiler drum, so that one water path passes through the water supply pipe, the heating section cold slag box, the water guide pipe, the boiler drum, the downcomer, the evaporation section cold slag box, the lead-out pipe, the boiler drum and the steam outlet in sequence, and the other water path passes through the water inlet of the cold slag machine, the cold slag machine and the water outlet of the cold slag machine in sequence. The device only describes the method of cooling the magnesium slag raw material through the evaporation section cold slag box, the heating section cold slag box and the cold slag machine in sequence, and does not describe in detail how the heat exchange structure inside the cold slag box is distributed, nor does it set up strengthening devices such as gas / spraying and gas recovery devices and anti-wear protection devices.

[0004] CN114963782A discloses a solid particle cooler, wherein the heat exchange unit comprises two oppositely arranged headers, a tube row is connected between the two headers, the headers and the tube row are filled with cooling medium, the tube row comprises at least two rows of heat exchange tubes distributed in the upper and lower directions, and the overlap of the orthographic projection of the two adjacent rows of heat exchange tubes in the upper and lower directions on the horizontal plane is ≥0 and less than 100%. The device only describes the relative position of the orthographic projection of the two adjacent rows of heat exchange tubes in the upper and lower directions, and does not set strengthening devices such as gas / spraying and gas recovery devices and anti-wear protection devices.

[0005] CN114812203A discloses a waste heat recovery device and recovery method based on heat-conducting particles to enhance heat transfer. The waste heat recovery device is configured to introduce heat-conducting particles into a heat exchange bin (1) to enhance local heat exchange in the heat exchange bin (1). The heat exchange bin (1) comprises: a shell; a sintered ore feed port (2) arranged on the shell; a sintered ore discharger (3) located at the bottom of the shell; and at least one heat exchange device arranged in the shell, wherein the waste heat recovery device also comprises a particle supply unit (7), and the particle supply unit (7) is arranged on the middle or lower part of the shell of the heat exchange bin (1) to provide heat-conducting particles into the heat exchange bin (1). The device focuses on describing the waste heat recovery method, and does not consider how to improve the heat exchange efficiency of hot particles in the structure of the device body. Similarly, no strengthening devices such as gas / spray and gas recovery device and anti-wear protection device are provided.

[0006] In summary, the main problems of the existing technology are low heat exchange efficiency, and the same heat exchange effect can only be achieved by increasing the heat exchange area of ​​the equipment, so the equipment cost is high; the heat exchange is uneven, and the heat exchange effect of the material in the middle of the heat exchanger channel is poor, which easily causes the semi-coke to catch fire when it is transported to the material yard; and the production environment is poor, and there are safety hazards. These problems need to be solved urgently. Summary of the invention

[0007] Purpose of the invention: The purpose of the invention is to provide a staggered arrangement of dry coke quenching equipment with enhanced heat exchange function.

[0008] Technical solution: The present invention provides a staggered arrangement and enhanced heat exchange function dry quenching device, the dry quenching device comprises a plurality of heat exchangers, the plurality of heat exchangers are provided with heat exchange tubes or heat exchange plates, the heat exchange tubes or heat exchange plates in the plurality of heat exchangers are arranged in an up-down staggered arrangement, and the plurality of heat exchangers are sealed and connected. The plurality of heat exchangers can be more than two.

[0009] Among them, multiple heat exchangers are sealed and connected, and expansion joints are provided at the connection points. The material channels of multiple heat exchangers are arranged in a staggered manner. When the intermediate materials in each channel of the upper-level heat exchanger enter the lower-level heat exchanger, the heat exchange tubes or heat exchange plates are arranged in a staggered manner, so that the materials can be adjusted to a position close to the edge of the channel, thereby improving the heat exchange effect between the materials and the heat exchanger.

[0010] Among them, a "fishbone-shaped" gas distribution / spraying structure is provided between the multiple heat exchange bodies, and gas can be connected from the outside of the dry coke quenching device to spray gas into the dry coke quenching device, thereby improving the enhanced heat exchange effect.

[0011] The "fishbone-shaped" air distribution / spraying structure includes a main pipe, two sides of the main pipe are branch pipes, and a plurality of nozzles are arranged on the branch pipes.

[0012] The upper part of the "fishbone-shaped" air distribution / spraying structure is provided with an anti-wear protective umbrella. The "fishbone-shaped" air distribution / spraying structure is hidden under the anti-wear protective umbrella, which can avoid direct contact between the material and the air distribution / spraying structure and increase the service life of the air distribution / spraying structure.

[0013] Among them, an umbrella support is provided at the lower part of the "fishbone-shaped" air distribution / spraying structure, and the umbrella support supports the anti-wear protection umbrella.

[0014] The anti-wear protection umbrella structure comprises a main umbrella and a secondary umbrella. The cross-sectional shape of the anti-wear protection umbrella is a pentagon, and the upper part is an isosceles triangle.

[0015] The top angle of the isosceles triangle is 45° to 70°, which can reduce the accumulation of materials and improve the fluidity of materials.

[0016] Among them, the top of the dry coke quenching device is equipped with an anti-blocking gas collection and recovery device, which is externally connected to a fan. Through pressure adjustment, the coal gas, fine dust and coke quenching gas sprayed into the furnace are led out of the furnace for centralized treatment, which completely solves the environmental pollution and safety problems in the coke quenching process.

[0017] Among them, the anti-blocking gas collection and recovery device is provided with a gas collection duct, and a plurality of gas collection umbrellas are arranged on the gas collection duct. The gas collection duct includes an inner wall panel and an outer wall panel. The inner wall panel and the outer wall panel can be externally connected to high-pressure nitrogen or steam. The inner wall panel is provided with air distribution holes, which can back-blow the gas collection duct.

[0018] Among them, the gas collecting flue and the gas collecting umbrella of the anti-blocking gas collecting and recovery device both adopt a pentagonal cross-section, and the angle of the pentagon top is 45° to 70°.

[0019] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages:

[0020] (1) The heat exchange tubes or heat exchange plates of the present invention are arranged in a staggered manner up and down. Since the material channels are arranged in a staggered manner, combined with the unique air distribution / spraying structural components, the heat exchange effect between the material and the heat exchange body can be improved, thereby greatly reducing the equipment investment; with the improvement of the heat exchange effect, the semi-coke is thoroughly cooled, and the hidden danger of fire in the semi-coke bin / material yard is also eliminated.

[0021] (2) Due to the unique anti-blocking gas collection and recovery device installed on the top of the quenching device, the environmentally friendly, safe and long-term production operation of the pyrolysis device is achieved.

[0022] (3) The multi-layer heat exchange structure and back-flushing method proposed in the present invention are not only applicable to components inside the furnace, but also to pipelines and equipment outside the furnace, thus completely solving the industry problem of blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 It is a top view of the primary / secondary heat exchanger structure;

[0025] Figure 3 It is a schematic diagram of the "fishbone-shaped" air distribution / spraying structure;

[0026] Figure 4 This is a schematic diagram of the anti-wear umbrella structure;

[0027] Figure 5 This is a schematic diagram of the structure of the anti-blocking gas collection and recovery device. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0029] Example 1

[0030] like Figure 1 As shown, the dry quenching device of the present invention with staggered arrangement and enhanced heat exchange function includes two heat exchangers, namely a primary heat exchanger 1 and a secondary heat exchanger 2. The two heat exchangers are sealed and connected, and an expansion joint 3 is provided at the connection. The material channels of the two heat exchangers are staggered, such as Figure 2 As shown. Heat exchange tubes or heat exchange plates 101, 201 are arranged inside the primary heat exchanger 1 and the secondary heat exchanger 2, and the heat exchange tubes or heat exchange plates are arranged in a staggered manner. When the intermediate materials in each channel of the primary heat exchanger 1 enter the secondary heat exchanger 2, the materials can be adjusted to a position close to the edge of the channel by staggered arrangement, thereby improving the heat exchange effect between the materials and the two heat exchangers.

[0031] Among them, Figure 3 As shown, a "fishbone-shaped" air distribution / spraying structure 4 is provided between the two heat exchangers, and gas can be connected from the outside of the dry coke quenching device to be sprayed into the dry coke quenching device to improve the enhanced heat exchange effect. The "fishbone-shaped" air distribution / spraying structure 4 includes a main pipe 401, and the two sides of the main pipe 401 are branch pipes 402, and a plurality of nozzles 403 are provided on the branch pipes 402. An anti-wear protective umbrella 5 is provided on the upper part of the "fishbone-shaped" air distribution / spraying structure 4. The protective umbrella 5 is supported by an umbrella support 7, and the umbrella support 4 is located at the lower part of the "fishbone-shaped" air distribution / spraying structure 4. The "fishbone-shaped" air distribution / spraying structure 4 is hidden under the anti-wear protective umbrella 5, which can avoid direct contact between the material and the air distribution / spraying structure, thereby improving the service life of the air distribution / spraying structure 4.

[0032] like Figure 4 As shown, the anti-wear protection umbrella structure 5 includes a main umbrella 501 and a secondary umbrella 502. The cross-sectional shape of the anti-wear protection umbrella 5 is a pentagon, and the upper part is an isosceles triangle. The top angle of the isosceles triangle is 45° to 70°, which can reduce the accumulation of materials and improve the fluidity of materials;

[0033] Among them, Figure 5 As shown, the top of the dry coke quenching device is provided with an anti-blocking gas collection and recovery device 6, and is connected to a fan. Through pressure adjustment, the coal gas, fine dust and coke quenching gas sprayed into the furnace carried by the semi-coke are led out of the furnace for centralized treatment, which completely solves the environmental pollution and safety problems existing in the coke quenching process. The anti-blocking gas collection and recovery device 6 is provided with a gas collection flue 602, and a plurality of gas collection umbrellas 601 are provided on the gas collection flue 602. The gas collection umbrella 601 is supported by an umbrella support provided at the bottom of the gas collection flue 602. The gas collection flue 602 includes an inner wall plate 603 and an outer wall plate 604. The inner wall plate 603 and the outer wall plate 604 can be connected to high-pressure nitrogen or steam. The inner wall plate 603 is provided with air distribution holes, which can back-blow the flue gas. The gas collection flue 602 and the gas collection umbrella 601 of the anti-blocking gas collection and recovery device 6 both adopt a pentagonal cross-section, and the angle of the top of the pentagon is 45° to 70°.

[0034] In order to solve the problem of low heat exchange efficiency of materials in the middle of the material channel, the present invention adopts a multi-stage heat exchange body structure and arranges the material channels in a staggered manner. The high-temperature semi-coke in the carbonization chamber of the pyrolysis furnace enters the primary heat exchange body (see Figure 1 ), the semi-coke exchanges heat indirectly with the primary heat exchanger 1. As the coke discharge system continuously discharges coke, the semi-coke moves downward. After the semi-coke comes out of the primary heat exchanger 1, it is ready to enter the secondary heat exchanger 2 (see Figure 1 ), the heat exchange tubes or heat exchange plates of the primary heat exchanger 1 and the secondary heat exchanger 2 are arranged in an up-down staggered manner, which can effectively move the intermediate semi-coke in each channel of the primary heat exchanger 1 close to the edge of the channel when entering the secondary heat exchanger 2, thereby improving the heat exchange effect between the material and the secondary heat exchanger 2; the heat exchange base is set according to the needs, and the material will be forced to be disturbed multiple times during the falling process. According to calculations, the heat exchange efficiency is increased by about 20% each time the material is disturbed.

[0035] Secondly, in order to enhance heat exchange, an air distribution / spraying structure 4 is arranged between each level of heat exchangers, and the gas directly enters the material layer, so that the quenching method is changed from heat conduction alone to heat conduction + convection heat transfer, and the heat exchange efficiency is increased by more than 50%; the specific structure of the air distribution / spraying structure 4 is a "fishbone shape" (see Figure 3 ), the upper part of the structure is provided with an anti-wear protective umbrella 5 (see Figure 4 The “fishbone-shaped” air distribution / spraying structure 4 is hidden under the anti-wear protective umbrella 5, which can prevent the material from directly contacting the air distribution / spraying structure, thereby increasing the service life of the air distribution / spraying structure 4.

[0036] Finally, in order to improve the production environment, an anti-blocking gas collection and recovery device 6 is set on the top of the coke quenching device, and an external induced draft fan is connected to draw the coal gas, fine dust and coke quenching gas carried by the semi-coke out of the furnace, completely solving the environmental pollution and safety problems in the coke discharge process. After collection, it is discharged out of the furnace. In order to prevent the components of the anti-blocking gas collection and recovery device 6 from being blocked by dust and tar, the anti-blocking gas collection and recovery device 6 is set to an inner and outer double-layer structure (see Figure 5 ), the inner wall plate 603 is provided with air distribution holes, and high-pressure nitrogen or steam can be connected between the two wall plates. When the gas recovered by the anti-blocking gas collection device 6 carries impurities such as dust and forms adhesion on the inner wall plate 603, back-blowing can be performed to avoid the problem of blockage of the anti-blocking gas collection recovery device 6. The specific form is shown in Figure 5 .

Claims

1. A staggered arrangement of coke dry quenching devices with enhanced heat exchange function, characterized in that: The dry coke quenching device comprises a plurality of heat exchangers, wherein heat exchange tubes or heat exchange plates are arranged in the plurality of heat exchangers, and the heat exchange tubes or heat exchange plates in the plurality of heat exchangers are arranged in an up-and-down staggered manner, and the plurality of heat exchangers are sealed and connected to each other, and a "fishbone-shaped" gas distribution / spraying structure is arranged between the plurality of heat exchangers, and an anti-wear protective umbrella is arranged on the upper part of the "fishbone-shaped" gas distribution / spraying structure, and an anti-blocking gas collection and recovery device is arranged on the top of the dry coke quenching device, and the anti-blocking gas collection and recovery device is connected to an external fan, and the anti-blocking gas collection and recovery device is provided with a gas collection flue, and a plurality of gas collection umbrellas are arranged on the gas collection flue, and the gas collection flue comprises an inner wall panel and an outer wall panel, and the inner wall panel and the outer wall panel can be externally connected to high-pressure nitrogen or steam, and the inner wall panel is provided with gas distribution holes, and the gas collection flue can be backblown.

2. The staggered arrangement and enhanced heat exchange coke dry quenching device according to claim 1 is characterized in that: The "fishbone-shaped" air distribution / spraying structure includes a main pipe, two sides of the main pipe are branch pipes, and a plurality of nozzles are arranged on the branch pipes.

3. The staggered arrangement and heat exchange enhanced coke dry quenching device according to claim 1 is characterized in that: An umbrella support is provided at the bottom of the "fishbone-shaped" air distribution / spraying structure, and the umbrella support supports the anti-wear protection umbrella.

4. The staggered arrangement and heat exchange enhanced coke dry quenching device according to claim 3 is characterized in that: The anti-wear protection umbrella comprises a main umbrella and a secondary umbrella. The cross-section of the anti-wear protection umbrella is a pentagon, and the upper part is an isosceles triangle.

5. The staggered arrangement and heat exchange enhanced coke dry quenching device according to claim 4 is characterized in that: The top angle of the isosceles triangle is 45° to 70°.

6. The staggered arrangement and heat exchange enhanced coke dry quenching device according to claim 1 is characterized in that: The gas collecting flue and the gas collecting umbrella of the anti-blocking gas collecting and recovery device both adopt a pentagonal cross-section, and the angle of the top of the pentagon is 45°~70°.

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