Coke-oven gas cooler convenient to maintain

Abstract

The utility model relates to the technical field of coke-oven gas coolers, in particular to a coke-oven gas cooler convenient to maintain, which comprises a cooling tank. The multi-stage cooling structure comprises an air guide pipe fixedly installed in the cooling tank, a groove pipe fixedly installed in the heat exchange cylinder, a separation pipe fixedly installed on the left side in the heat exchange cylinder, a heat exchange pipe fixedly installed on the outer wall of the separation pipe and a pipe bundle frame fixedly installed on the right side in the cooling tank. According to the coke oven gas cooler convenient to maintain, the low-heat coke oven gas is used for primary heat exchange and cooling of the high-temperature coke oven gas, and then the cooled coke oven gas is used for rapid heat exchange with the residual high-temperature coke oven gas, so that sequential heat exchange of the low-heat coke oven gas and the cooled coke oven gas is realized, and the cooling efficiency of the coke oven gas is improved; meanwhile, heat exchange treatment is provided for the inlet and outlet coke oven gas through the heat storage ceramic piece, heat energy recycling of the heat storage ceramic piece is achieved, and the energy-saving effect is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of coke oven gas coolers, and particularly relates to a coke oven gas cooler convenient for maintenance. Background Art

[0002] A coke oven gas cooler refers to a device for cooling and purifying coke oven gas generated during coal coking processing, and is a primary cooler for coke oven gas that can reduce the volume of the gas. There are two types of primary coolers for gas: indirect and direct. Since high-temperature coke oven gas contains various impurity components, it needs to be cooled by a cooler to facilitate subsequent impurity removal and purification processes.

[0003] After retrieval, a high-efficiency water cooler for coke oven gas is disclosed in the utility model patent with the Chinese patent publication number CN206014804U. In this high-efficiency water cooler for coke oven gas, high-temperature coke oven gas is passed into the inner wall of a dynamic water-cooled heat exchanger, and cooling water is directly passed into the trapezoidal thread grooves provided on the outer wall of the dynamic water-cooled heat exchanger. The cooling water and the high-temperature coke oven gas inside are used for rapid heat exchange. However, since the temperature of the coke oven gas just entering the dynamic water-cooled heat exchanger is relatively high, sudden contact with the cooling water requires high requirements for the structure of the dynamic water-cooled heat exchanger, and it is impossible to avoid the situation of structural damage to the heat exchanger caused by sudden alternation of cold and heat. At the same time, this high-efficiency water cooler for coke oven gas cannot effectively utilize the heat energy exchanged by the coke oven gas. Therefore, there is still room for further improvement in the cooling structure, so a coke oven gas cooler convenient for maintenance is proposed. Summary of the Utility Model

[0004] (I) Technical Problems to be Solved

[0005] The technical problem to be solved by the utility model is to provide a coke oven gas cooler convenient for maintenance that can gradually cool down and recover and utilize heat energy.

[0006] (II) Technical Solutions

[0007] To achieve the above object, the utility model provides the following technical solution: A coke oven gas cooler convenient for maintenance, including a cooling tank, and a multi-stage cooling structure is arranged inside the cooling tank;

[0008] The multi-stage cooling structure includes a gas guide pipe fixedly installed inside the cooling tank, a heat exchange cylinder fixedly installed on the left side inside the cooling tank, a groove pipe fixedly installed inside the heat exchange cylinder, a separation pipe fixedly installed on the left side inside the heat exchange cylinder, heat exchange pipes fixedly installed on the outer wall of the separation pipe, and a tube bundle rack fixedly installed on the right side inside the cooling tank.

[0009] Furthermore, a heat storage component is provided on the back surface of the cooling tank. The heat storage component includes a heat storage box fixed to the left side of the back surface of the cooling tank. Inside the heat storage box, a heat storage ceramic member in the shape of a hollow cylinder is fixedly connected. Inside the heat storage ceramic member, a first heat conduction pipe is fixedly connected. The right end of the first heat conduction pipe is fixedly connected to a first intake pipe.

[0010] Furthermore, two non - communicating ventilation grooves are provided inside the air guide pipe. An air inlet is provided at the top of one of the ventilation grooves, and an air outlet is provided at the bottom of the other ventilation groove. The right end of the first intake pipe penetrates through the back surface of the cooling tank and is connected in communication with one of the ventilation grooves. The left end of the first heat conduction pipe is connected in communication with a second intake pipe. A gas storage groove in the shape of a cylinder is provided inside the groove pipe. The top of the second intake pipe is connected in communication with the left side of the top of the groove pipe.

[0011] Furthermore, a first intake pipe is fixedly connected to the left side of the top of the cooling tank. The first intake pipe is externally connected to the outlet end of the primary zinc oxide process gas. The right end of the heat exchange cylinder is connected in communication with the bottom of the first intake pipe. The left side of the top of the separation pipe is connected in communication with the left end of the heat exchange cylinder.

[0012] Furthermore, a condensate pipe is connected in communication with the bottom of the separation pipe. The rear end of the condensate pipe is connected in communication with the inner rear wall of the cooling tank. The right end of the heat exchange pipe is connected in communication with one of the ventilation grooves.

[0013] Furthermore, a second heat conduction pipe is fixedly connected to the inner side of the heat storage ceramic member. The left end of the heat exchange pipe and the right side of the bottom of the groove pipe are both fixedly connected with a first exhaust pipe. The rear ends of the two first exhaust pipes are both connected in communication with the left end of the second heat conduction pipe. The right end of the second heat conduction pipe is fixedly connected to a second exhaust pipe. The right end of the second exhaust pipe penetrates through the back surface of the cooling tank and is connected in communication with the other ventilation groove.

[0014] Furthermore, the tube bundle support is a structure of a number of U - shaped pipe racks. The top of the left end of each U - shaped pipe is connected in communication with one of the ventilation grooves, and the bottom of the left end of each U - shaped pipe is connected in communication with the other ventilation groove. An exhaust end pipe is fixedly connected to the right side of the top of the cooling tank.

[0015] Furthermore, a first outlet pipe is fixedly connected to the left side of the bottom of the cooling tank, and a second intake pipe is fixedly connected to the right side of the bottom of the cooling tank. The first outlet pipe is connected in communication with the air inlet through a first through - pipe. A second outlet pipe is fixedly connected to the top of the cooling tank. The second outlet pipe is connected in communication with the air inlet through a second through - pipe. A drain end pipe is fixedly connected to the bottom of the cooling tank.

[0016] Beneficial effects

[0017] Compared with the existing technology, the technical solution of this application has the following beneficial effects:

[0018] 1. This easy-to-maintain coke oven gas cooler introduces high-temperature coke oven gas into the first air inlet pipe, and first introduces low-temperature coke oven gas after absorbing heat from the heat storage ceramic component into the gas storage tank inside the tank pipe through the second air inlet pipe. The low-temperature coke oven gas is used to perform initial heat exchange and cooling of the high-temperature coke oven gas, avoiding sudden alternation between hot and cold. The initially cooled coke oven gas then continues to enter the separation pipe, and the heat exchange pipe receives the cooled coke oven gas from the gas guide pipe, which is then heat-exchanged again with the initially cooled coke oven gas. The tube bundle rack is then used to perform a third cooling treatment on the residual heat of the coke oven gas, thereby sequentially exchanging heat between the low-temperature coke oven gas and the cooled coke oven gas, thereby improving the cooling efficiency of the coke oven gas.

[0019] 2. This easy-to-maintain coke oven gas cooler diverts the partially cooled coke oven gas in the air guide pipe to the No. 1 heat conduction pipe through the No. 1 air inlet pipe, absorbs the heat of the heat storage ceramic component and converts it into low-heat coke oven gas. The low-heat coke oven gas is then sent to the heat exchange cylinder through the No. 2 air inlet pipe for use. The heat exchange cylinder and heat exchange pipe then send the heat-exchanged coke oven gas to the No. 2 heat conduction pipe through the No. 1 exhaust pipe, storing heat in the heat storage ceramic component, realizing the heat energy circulation exchange and utilization process of the heat storage ceramic component, and further improving the energy-saving effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a three-dimensional schematic diagram of the cooling tank structure of the utility model;

[0021] Figure 2 for Figure 1 Cross-sectional view from perspective;

[0022] Figure 3 for Figure 1 rear view from perspective;

[0023] Figure 4 for Figure 2 Schematic diagram of some structures in perspective;

[0024] Figure 5 for Figure 4 Side view of the slotted tube structure in perspective;

[0025] Figure 6 for Figure 3 Side view of the thermal storage component in perspective.

[0026] In the figure: 1, cooling tank; 2, multi-stage cooling structure; 201, air duct; 202, heat exchange cylinder; 203, trough pipe; 204, separation tube; 205, heat exchange tube; 206, tube bundle support; 3, heat storage component; 301, heat storage box; 302, heat storage ceramic piece; 303, first heat conduction pipe; 304, second heat conduction pipe; 4, first intake pipe; 5, second intake pipe; 6, first inlet pipe; 7, first exhaust pipe; 8, second exhaust pipe; 9, exhaust end pipe; 10, first outlet pipe; 11, second inlet pipe; 12, second outlet pipe; 13, drainage end pipe. Specific embodiments

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] Please refer to Figures 1-6 , a coke oven gas cooler that is convenient for maintenance, including a cooling tank 1. A multi-stage cooling structure 2 is arranged inside the cooling tank 1. A heat storage component 3 is arranged on the back of the cooling tank 1. The right end of the first heat conduction pipe 303 is fixedly connected to a first intake pipe 4, and the left end of the first heat conduction pipe 303 is connected through to a second intake pipe 5. The left side of the top of the cooling tank 1 is fixedly connected to a first inlet pipe 6. The left end of the heat exchange tube 205 and the bottom right side of the trough pipe 203 are both fixedly connected to a first exhaust pipe 7. The right end of the second heat conduction pipe 304 is fixedly connected to a second exhaust pipe 8. The right side of the top of the cooling tank 1 is fixedly connected to an exhaust end pipe 9. The left side of the bottom of the cooling tank 1 is fixedly connected to a first outlet pipe 10. The right side of the bottom of the cooling tank 1 is fixedly connected to a second intake pipe 11. The top of the cooling tank 1 is fixedly connected to a second outlet pipe 12. The second outlet pipe 12 is connected through to the air inlet through a second through pipe. The bottom of the cooling tank 1 is fixedly connected to a drainage end pipe 13.

[0029] The multi-stage cooling structure 2 includes an air guide pipe 201 fixedly installed inside the cooling tank 1, a heat exchange cylinder 202 fixedly installed on the left side inside the cooling tank 1, a tank pipe 203 fixedly installed inside the heat exchange cylinder 202, a separation pipe 204 fixedly installed on the left side inside the heat exchange cylinder 202, a heat exchange pipe 205 fixedly installed on the outer wall of the separation pipe 204, and a tube bundle rack 206 fixedly installed on the right side inside the cooling tank 1. The low-temperature coke oven gas is introduced into the gas storage tank of the tank pipe 203 to perform the first cooling treatment on the high-temperature coke oven gas. The separation pipe 204 is used to separate the coke oven gas and the condensed water vapor. A water collection ring pipe is connected to the bottom of the separation pipe 204, and the water collection ring pipe is connected to the inner rear wall of the cooling tank 1 in a through manner, which is convenient for discharging the condensed water in time. The U-shaped pipe of the tube bundle rack 206 is used to introduce the cold coke oven gas for the third cooling treatment.

[0030] The heat storage component 3 includes a heat storage box 301 fixed to the left side of the back of the cooling tank 1. Inside the heat storage box 301, a heat storage ceramic part 302 with a hollow cylindrical structure is fixedly connected. Inside the heat storage ceramic part 302, a first heat conduction pipe 303 is fixedly connected. The heat stored by the heat storage ceramic part 302 is transferred to the first heat conduction pipe 303 to heat the cold coke oven gas. A second heat conduction pipe 304 is fixedly connected to the inner side of the heat storage ceramic part 302. The heat of the heat-exchanged coke oven gas is transferred to the heat storage ceramic part 302 through the second heat conduction pipe 304 to store heat.

[0031] According to Figure 3 and Figure 6 As shown, the first heat conduction pipe 303 is located inside the heat storage ceramic part 302 and is used to absorb the heat stored by the heat storage ceramic part 302. A part of the cold coke oven gas in the air vent groove inside the air guide pipe 201 is diverted into the first heat conduction pipe 303. After being heated into low-temperature coke oven gas, it enters the tank pipe 203 of the heat exchange cylinder 202 through the second intake pipe 5. The gas storage tank with a cylindrical structure inside the tank pipe 203 is used to quickly exchange heat with the high-temperature coke oven gas, realizing the preliminary cooling effect of the low-temperature coke oven gas on the high-temperature coke oven gas.

[0032] According to Figure 2 and Figure 3 As shown, the coke oven gas after preliminary cooling enters the separation pipe 204. The right end of the heat exchange pipe 205 is connected to one of the air vent grooves in a through manner to introduce the cold coke oven gas. At this time, the heat exchange pipe 205 performs the secondary cooling treatment on the coke oven gas after preliminary cooling. The high-temperature water vapor in the coke oven gas condenses after cooling and is collected and discharged by the water collection ring pipe at the bottom of the separation pipe 204.

[0033] According to Figure 2 and Figure 3As shown, the left end of the heat exchange tube 205 and the right side of the bottom of the groove tube 203 are fixedly connected to the No. 1 exhaust pipe 7. The No. 1 exhaust pipe 7 is used to pass the coke oven gas after heat exchange into the No. 2 heat conduction pipe 304, and the exchanged heat is transferred to the interior of the heat storage ceramic part 302 for storage, which facilitates the recycling of heat energy.

[0034] according to Figure 2 and Figure 3 As shown, the right end of the heat exchange tube 205 is connected to the first air outlet pipe 10, and the first air outlet pipe 10 is connected to the second air inlet pipe 11, and the coke oven gas with residual heat is sent to the right side of the cooling tank 1. The U-shaped frame tube of the tube bundle rack 206 receives the cooled coke oven gas from the ventilation groove and performs a third cooling treatment on the residual heat of the coke oven gas. Then, the cooled coke oven gas is passed into the air guide pipe 201 again through the second air outlet pipe 12 for recycling. After the cooling work is completed, the exhaust end pipe 9 is opened to discharge and collect the coke oven gas inside the cooling tank 1, and then the exhaust end pipe 9 is closed and the drainage end pipe 13 is opened to discharge the condensed water on the right side of the cooling tank 1.

[0035] according to Figure 2 and Figure 3 As shown, the tube bundle rack 206 is changed from the traditional straight-through tube type to the U-tube type. After the tube bundle is coked, it is convenient for later core extraction and cleaning to improve the maintenance efficiency and restore the heat exchange efficiency of the heat exchanger. At the same time, by controlling the front and rear partitions of the two manual valves, it is convenient to clean the inside of the cooling tank 1 and complete the function restoration as soon as possible.

[0036] In summary, for the conveniently maintained coke oven gas cooler, the high-temperature coke oven gas is introduced into the first inlet pipe 6. Part of the cooled coke oven gas is introduced into the regenerative ceramic member 302 through the first inlet pipe 4. After absorbing part of the heat, it is converted into low-temperature coke oven gas. Then, the low-temperature coke oven gas is introduced into the gas storage tank inside the trough pipe 203 through the second inlet pipe 5, and the high-temperature coke oven gas is initially heat-exchanged and cooled by the low-temperature coke oven gas to avoid the situation of sudden cold and heat alternation. Then, the preliminarily cooled coke oven gas continues to be introduced into the separation pipe 204. The heat exchange pipe 205 receives the cooled coke oven gas from the gas guide pipe 201 and exchanges heat with the preliminarily cooled coke oven gas again. After the tube bundle frame 206 is introduced into the cooled coke oven gas through the gas guide pipe 201, the residual heat of the coke oven gas is subjected to a third cooling treatment by using the tube bundle frame 206. Thus, the low-temperature coke oven gas and the cooled coke oven gas are sequentially heat-exchanged, improving the cooling efficiency of the coke oven gas. Part of the cooled coke oven gas in the gas guide pipe 201 is shunted to the first heat conduction pipe 303 through the first inlet pipe 4. After absorbing the heat of the regenerative ceramic member 302, the low-temperature coke oven gas is sent into the heat exchange cylinder 202 through the second inlet pipe 5 for use. At the same time, the coke oven gas after heat exchange between the heat exchange cylinder 202 and the heat exchange pipe 205 is sent into the second heat conduction pipe 304 through the first exhaust pipe 7 for heat storage treatment of the regenerative ceramic member 302, realizing the process of recycling the thermal energy of the regenerative ceramic member 302 and further improving the energy-saving effect. This solves the problems in the above-mentioned background technology that the high-efficiency water cooler for coke oven gas cannot effectively avoid the structural damage of the heat exchange device caused by sudden cold and heat alternation, and cannot efficiently utilize the heat exchanged by the coke oven gas.

[0037] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0038] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coke oven gas cooler that is convenient for maintenance, including a cooling tank (1), characterized in that: A multi-stage cooling structure (2) is arranged inside the cooling tank (1); The multi-stage cooling structure (2) includes an air guide pipe (201) fixedly installed inside the cooling tank (1), a heat exchange cylinder (202) fixedly installed on the left side inside the cooling tank (1), a groove pipe (203) fixedly installed inside the heat exchange cylinder (202), a separation pipe (204) fixedly installed on the left side inside the heat exchange cylinder (202), a heat exchange pipe (205) fixedly installed on the outer wall of the separation pipe (204), and a tube bundle rack (206) fixedly installed on the right side inside the cooling tank (1).

2. The coke oven gas cooler according to claim 1, characterized in that: A heat storage component (3) is arranged on the back of the cooling tank (1). The heat storage component (3) includes a heat storage box (301) fixed to the left side of the back of the cooling tank (1). A heat storage ceramic part (302) with a hollow cylindrical structure is fixedly connected inside the heat storage box (301). A first heat conduction pipe (303) is fixedly connected inside the heat storage ceramic part (302). The right end of the first heat conduction pipe (303) is fixedly connected to a first air inlet pipe (4).

3. The coke oven gas cooler according to claim 2, characterized in that: Two non-communicating ventilation grooves are formed inside the air guide pipe (201). An air inlet is formed at the top of one of the ventilation grooves, and an air outlet is formed at the bottom of the other ventilation groove. The right end of the first air inlet pipe (4) penetrates through the back of the cooling tank (1) and is connected to one of the ventilation grooves in a through manner. The left end of the first heat conduction pipe (303) is connected to a second air inlet pipe (5) in a through manner. A cylindrical air storage groove is formed inside the groove pipe (203). The top of the second air inlet pipe (5) is connected to the left side of the top of the groove pipe (203) in a through manner.

4. A coke oven gas cooler convenient for maintenance according to claim 1, characterized in that: A first air inlet pipe (6) is fixedly connected to the left side of the top of the cooling tank (1). The first air inlet pipe (6) is externally connected to the outlet end of the primary zinc oxide process gas. The right end of the heat exchange cylinder (202) is connected to the bottom of the first air inlet pipe (6) in a through manner. The left side of the top of the separation pipe (204) is connected to the left end of the heat exchange cylinder (202) in a through manner.

5. The coke oven gas cooler according to claim 3, characterized in that: A condensate pipe is connected to the bottom of the separation pipe (204) in a through manner. The rear end of the condensate pipe is connected to the inner rear wall of the cooling tank (1) in a through manner. The right end of the heat exchange pipe (205) is connected to one of the ventilation grooves in a through manner.

6. The coke oven gas cooler according to claim 2, characterized in that: A second heat conduction pipe (304) is fixedly connected to the inner side of the heat storage ceramic part (302). A first exhaust pipe (7) is fixedly connected to the left end of the heat exchange pipe (B) and the right side of the bottom of the groove pipe (203). The rear ends of the two first exhaust pipes (7) are both connected to the left end of the second heat conduction pipe (304) in a through manner. The right end of the second heat conduction pipe (304) is fixedly connected to a second exhaust pipe (8). The right end of the second exhaust pipe (8) penetrates through the back of the cooling tank (1) and is connected to the other ventilation groove in a through manner.

7. The coke oven gas cooler convenient for maintenance according to claim 6, wherein: The tube bundle rack (206) is a structure composed of a number of U-shaped tube racks. The top left end of each U-shaped tube is connected to one of the ventilation slots in a through manner, and the bottom left end of each U-shaped tube is connected to another ventilation slot in a through manner. The right side of the top of the cooling tank (1) is fixedly connected to an exhaust end pipe (9).

8. The convenient-to-maintain coke oven gas cooler according to claim 3, wherein: The left side of the bottom of the cooling tank (1) is fixedly connected to a first air outlet pipe (10), and the right side of the bottom of the cooling tank (1) is fixedly connected to a second air inlet pipe (11). The first air outlet pipe (10) is connected to the air inlet in a through manner through a first connecting pipe. The top of the cooling tank (1) is fixedly connected to a second air outlet pipe (12). The second air outlet pipe (12) is connected to the air inlet in a through manner through a second connecting pipe. The bottom of the cooling tank (1) is fixedly connected to a drain end pipe (13).

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