Horizontal pipe type cooling system

Abstract

A horizontal pipe type cooling system solves the problem that the temperature of outlet coal gas is high under the high-temperature climate condition at present. The horizontal pipe type primary cooler comprises a horizontal pipe type primary cooler body, the horizontal pipe type primary cooler is divided into an upper section, a middle section and a lower section, and the horizontal pipe type primary cooler further comprises a circulating water cooling pipe which is communicated with a water inlet of the upper section and a water inlet of the middle section. And the low-temperature water cooling pipe is communicated with the water inlet of the lower section.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, in particular to a horizontal tube cooling system. Background Art

[0002] At present, the gas-liquid mixture (raw gas) from the coking area in the coking industry enters the gas-liquid separator, and the raw gas (80-85℃) after separating the ammonia water enters the horizontal tube primary cooler for cooling and purification. The gas enters from the top and exits from the bottom, and the cooling water enters from the bottom and exits from the top. The upper section is cooled by process circulating water, and the lower section is cooled by low-temperature circulating water. The cooled gas is about 19-25℃, enters the electric tar collector, and then enters the gas blower for pressurization and is sent to the ammonium sulfate section.

[0003] As an important equipment in the chemical area of ​​the coking industry, the primary cooler is mainly used to reduce the gas temperature before the primary cooler. The gas temperature before the primary cooler is 80-85℃, and 19-25℃ after cooling. For the Central Plains, the four seasons are distinct. In the hot summer, the ambient temperature reaches 40℃. The gas temperature after the primary cooler exceeds the standard, especially during the high temperature stage during the day. The high gas temperature after the primary cooler will bring a series of problems to the next process, mainly manifested in: the water vapor content in the gas increases, the volume becomes larger, resulting in insufficient blower capacity, affecting the normal transportation of the gas. The condenser of tar gas is lowered, and the tar content in the gas after the primary cooler increases. If the efficiency of the electric tar collector is not high, the quality of ammonium sulfate will deteriorate, and the washing of benzene, desulfurization, and denaphthalene will be affected, and the equipment will be blocked. In the primary cooler, when the naphthalene in the coal gas is cooled, part of it will precipitate out as tiny crystals. Since the particle size is very small, it is difficult for it to settle out from the high-speed coal gas and will be carried away with the coal gas. Therefore, the actual naphthalene content in the gas pipeline is 1-2 times higher than the saturated content at the same temperature. When the temperature increases, the naphthalene content in the coal gas will increase significantly. Utility Model Content

[0004] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a transverse tube cooling system, which effectively solves the problem of high outlet gas temperature under the current high temperature climate conditions.

[0005] To achieve the above purpose, the technical solution of the utility model is: a transverse tube cooling system, including a transverse tube primary cooler body, the transverse tube primary cooler is divided into an upper section, a middle section and a lower section,

[0006] It also includes a circulating water cooling pipe, which is connected to the water inlet of the upper section and the middle section respectively;

[0007] It also includes a low-temperature water cooling pipe, which is communicated with the water inlet of the lower section.

[0008] Preferably, it also includes a circulating water outlet pipe, which is communicated with the water outlets of the upper section and the middle section.

[0009] Preferably, the water inlet of the upper section is connected to an upper section water inlet pipe, which is communicated with a circulating water cooling pipe, and the water inlet of the middle section is connected to a middle section water inlet pipe, which is communicated with a circulating water cooling pipe.

[0010] Preferably, valves are provided on both the upper water inlet pipe and the middle water inlet pipe.

[0011] Preferably, the valve comprises a valve body, and a connecting pipe is fixed to one end of the valve body;

[0012] A plugging pipe is fixed on the upper water inlet pipe or the middle water inlet pipe, and the connecting pipe is connected with the plugging pipe to form a structure for the entire pipeline flow.

[0013] Preferably, an insertion rod is fixed in the middle of the connecting tube, and the outer end of the insertion rod exceeds the connecting tube and can be inserted into the blocking tube;

[0014] A horizontally sliding plugging head is arranged in the plugging tube. The plugging head is a conical structure. The end surface area of ​​the plugging head close to the connecting tube is smaller than the end surface area of ​​the plugging head away from the connecting tube.

[0015] Preferably, a support plate is fixed in the blocking tube, and a guide rod is fixed to the blocking head end away from the connecting tube side. The guide rod can slidably pass through the support plate, and a spring is mounted on the guide rod. One end of the spring is fixedly connected to the blocking head, and the other end of the spring is fixedly connected to the support plate. The spring is a structure that always pushes the blocking head to move closer to the connecting tube side.

[0016] Preferably, a sleeve is rotatably provided on the outer side of the connecting pipe, and the other end of the sleeve is threadedly connected to the blocking pipe.

[0017] Compared with the prior art, the utility model has the following benefits: 1) It adopts a three-in-three-out method, with circulating cooling water used in the upper and middle sections and low-temperature water cooling used in the lower section to ensure the best cooling efficiency; 2) When replacing the valve, it can effectively prevent a large amount of cooling water in the water inlet pipe from flowing out, avoid wasting resources, and reduce unnecessary trouble. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a partial structural diagram of the valve of the utility model;

[0020] Figure 3 for Figure 2 Schematic diagram of explosion structure;

[0021] Figure 4 for Figure 3 The schematic diagram of the structure after partial sectioning;

[0022] In the figure: 1. Horizontal tube type primary cooler body; 2. Circulating water cooling pipe; 3. Low-temperature water cooling pipe; 4. Circulating water outlet pipe; 5. Connecting pipe; 6. Sealing pipe; 7. Insertion rod; 8. Sealing head; 9. Extended support plate; 10. Guide rod; 11. Spring; 12. Sleeve. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model, that is, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the utility model provided in the accompanying drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents selected embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0025] Please refer to Figure 1-4 A transverse tube cooling system comprises a transverse tube primary cooler body 1, wherein the transverse tube primary cooler is divided into an upper section, a middle section and a lower section.

[0026] It also includes a circulating water cooling pipe 2, which is connected to the water inlet of the upper section and the middle section respectively;

[0027] It also includes a low-temperature water cooling pipe 3, which is communicated with the water inlet of the lower section.

[0028] In this device, the entire primary cooler is divided into three sections. The lower section is still cooled by low-temperature water, while the middle and upper sections are cooled by circulating water. The water temperature at the water inlet of the middle and upper sections is 27°C. The temperature difference between the water temperature at the water inlet of the upper section and the gas temperature is large, and the heat exchange effect is better. After heat exchange in the upper section, the gas enters the middle section for further heat exchange. When the circulating water flow rate is the same, the key indicator of the gas temperature at the outlet of the primary cooler is stable, ensuring the continuous and stable operation of the subsequent processes.

[0029] It also includes a circulating water outlet pipe 4, which is communicated with the water outlets of the upper section and the middle section.

[0030] The water inlet of the upper section is connected to an upper section water inlet pipe, which is communicated with the circulating water cooling pipe 2 ; the water inlet of the middle section is connected to a middle section water inlet pipe, which is communicated with the circulating water cooling pipe 2 .

[0031] Valves are provided on the upper water inlet pipe and the middle water inlet pipe.

[0032] The circulating cooling water passes through the circulating cooling water pipe and enters the upper water inlet pipe and the lower water inlet pipe through different valves, and then performs heat exchange. By adjusting the valve flow rate, better heat exchange effect can be achieved.

[0033] The valve comprises a valve body, one end of which is fixed with a connecting pipe 5;

[0034] A plugging pipe 6 is fixed on the upper water inlet pipe or the middle water inlet pipe, and the connecting pipe 5 is connected with the plugging pipe 6 to form a structure for the entire pipeline flow.

[0035] When the valve needs to be better, the water inside the water inlet pipe will flow out. At this time, it is necessary to effectively control the outflow of water. For this reason, when we open the connection between the sealing tube 6 and the connecting tube 5, the sealing tube 6 can be well sealed to prevent the cooling water in the water inlet pipe from flowing out and causing unnecessary trouble.

[0036] An insertion rod 7 is fixed in the middle of the connecting tube 5, and the outer end of the insertion rod 7 exceeds the connecting tube 5 and can be inserted into the blocking tube 6;

[0037] A horizontally sliding plugging head 8 is provided in the plugging tube 6 . The plugging head 8 is a conical structure. The end surface area of ​​the plugging head 8 close to the connecting tube 5 is smaller than the end surface area of ​​the plugging head 8 away from the connecting tube 5 .

[0038] In this device, when the insertion rod 7 is inserted into the blocking pipe 6 and contacts the blocking head 8, the blocking head 8 no longer blocks the blocking pipe 6, and the entire water pipe is now unblocked;

[0039] When the insertion rod 7 is no longer in contact with the plugging head 8, the plugging head 8 blocks the plugging pipe 6, thereby effectively preventing the cooling water in the water inlet pipe from flowing out.

[0040] A support plate 9 is fixed in the blocking tube 6, and a guide rod 10 is fixed to the end of the blocking head 8 away from the connecting tube 5. The guide rod 10 can slide through the support plate 9, and a spring 11 is mounted on the guide rod 10. One end of the spring 11 is fixedly connected to the blocking head 8, and the other end of the spring 11 is fixedly connected to the support plate 9. The spring 11 is a structure that always pushes the blocking head 8 to move toward the connecting tube 5 side.

[0041] Under the action of the spring 11 , the plugging head 8 can better seal the plugging tube 6 .

[0042] A sleeve 12 is rotatably provided on the outer side of the connecting pipe 5 , and the other end of the sleeve 12 is threadedly connected to the blocking pipe 6 .

[0043] In this device, the sleeve 12 is rotatably connected to the connecting pipe 5. When the insertion rod 7 begins to contact the plugging head 8, the sleeve 12 is screwed onto the plugging tube 6 by two to three threads. In this way, the cooling water can be effectively prevented from flowing outward. As the matching length of the sleeve 12 and the plugging tube 6 increases, the insertion rod 7 pushes the plugging head 8 away from the plugging tube 6, thereby opening the entire pipeline.

[0044] Our company's coke oven is a 2*60 hole 6m ramming coke oven with a designed production capacity of 120 tons / year and a gas production of 60,000m³ / h. It is equipped with 3 horizontal tube primary coolers. When the system is operating normally, two are in operation and one is in standby. The primary cooler structure is divided into two sections, the lower section is cooled by low-temperature water, with an inlet temperature of 16°C and an outlet temperature of 23°C. The upper section is cooled by cooling water, with an inlet temperature of 27°C and an outlet temperature of 55°C. During the high temperature period in summer, the circulating water volume is adjusted to the maximum, and the gas temperature at the outlet of the primary cooler is still high.

[0045] This renovation divided the original upper section of the primary cooler into two, and the primary cooler was transformed from the original two-section type to a three-section type, namely the upper section, the middle section and the lower section. The pipeline was transformed from the original two inlets and two outlets to three inlets and three outlets (the middle section and the upper section were completely cut off, and a new upper section inlet and outlet pipeline was laid, both of which were equipped with valves). The specific implementation steps and renovation methods are as follows:

[0046] 1) The valves of the primary cooler inlet and outlet gas pipelines are closed and blind plates are installed for hard isolation. The butterfly valve of the process circulating water pipeline is closed and blind plates are installed to replace the gas inside the equipment. After the replacement is qualified, the next step of construction is carried out.

[0047] 2) All prefabricated pipes and cranes are in place, personnel, tools and equipment are complete, and all kinds of tickets are processed.

[0048] 3) Lower section of primary cooler: No modification is required, and the original low-temperature water cooling system is retained.

[0049] 4) Middle section of primary cooler: the original 5-way (single primary cooler) connecting pipe 5 between the middle section and the upper section is removed, and a new 5-way connecting pipe 5 is made. The 5-way connecting pipe 5 is connected to the newly added DN500 pipe, and the DN500 pipe is then connected to the upper section outlet pipe.

[0050] 5) Upper section of the primary cooler: At the height of the dividing line between the middle and upper sections of the primary cooler, a new DN300 pipeline is added to the original upper section outlet pipeline to the double-effect heat pump pipeline; another new DN300 pipeline is added to connect to the 5-way connecting pipe 5 at the inlet of the upper section of the primary cooler.

[0051] 6) A hole is opened under pressure on the water inlet pipe (DN700) in the middle section of the original primary cooler, and a DN300 pipeline is led out to connect to the newly added upper inlet pipeline after the transformation. A DN350 gate valve is installed in the middle for water line switching.

[0052] 7) Drill a hole under pressure on the original primary cooler middle water outlet pipe (DN700), lead out a DN300 pipeline and connect it to the newly added upper outlet pipeline after the transformation, and install a DN350 gate valve in the middle for water channel switching.

[0053] 8) After the construction of each primary cooler is completed, the water channel blind plate must be removed for pressure testing. When the pressure rises to 0.4MPa and stabilizes for 1 hour, observe the pressure gauge. It is qualified if there is no pressure drop or leakage.

[0054] 9) Remove the blind plates of the inlet and outlet gas valves of the primary cooler. After qualified replacement, open the water line, introduce gas, and the primary cooler will operate normally.

[0055] Our company plans to transform the upper section of the primary cooler into two sections, and finally the primary cooler is divided into the upper section, the middle section and the lower section. The lower section still uses low-temperature water for cooling, and the middle and upper sections use circulating water for cooling. The inlet water temperature of the middle and upper sections is 27 degrees. The temperature difference between the inlet water temperature of the upper section and the gas temperature is large, and the heat exchange effect is better. After heat exchange in the upper section, the gas enters the middle section for further heat exchange. Under the condition of the same flow rate of circulating water, the key indicator of the gas temperature at the outlet of the primary cooler is stable, ensuring the continuous and stable operation of subsequent processes.

[0056] It should be noted that 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 such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the description of the present utility model, unless otherwise clearly specified and limited, the terms "install", "connect" and "connect" that may appear should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood by specific circumstances.

[0057] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the term "provided with" that may appear should be understood in a broad sense. For example, the object "provided with" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or an inseparable connection. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

Claims

1. A transverse tube cooling system, comprising a transverse tube primary cooler body (1), characterized in that: The horizontal tube type primary cooler is divided into an upper section, a middle section and a lower section. It also includes a circulating water cooling pipe (2), the circulating water cooling pipe (2) being in communication with the water inlets of the upper section and the middle section respectively; It also includes a low-temperature water cooling pipe (3), which is in communication with the water inlet of the lower section; it also includes a circulating water outlet pipe (4), which is in communication with the water outlets of the upper section and the middle section; the water inlet of the upper section is connected to an upper section water inlet pipe, which is in communication with the circulating water cooling pipe (2); the water inlet of the middle section is connected to a middle section water inlet pipe, which is in communication with the circulating water cooling pipe (2); valves are provided on the upper section water inlet pipe and the middle section water inlet pipe.

2. A horizontal tube cooling system according to claim 1, characterized in that: The valve comprises a valve body, one end of which is fixed with a connecting pipe (5); A plugging pipe (6) is fixed on the upper water inlet pipe or the middle water inlet pipe, and the connecting pipe (5) is connected to the plugging pipe (6) to form a structure for the entire pipeline flow.

3. A horizontal tube cooling system according to claim 2, characterized in that: An insertion rod (7) is fixed in the middle of the connecting tube (5), and the outer end of the insertion rod (7) exceeds the connecting tube (5) and can be inserted into the blocking tube (6); A horizontally sliding plugging head (8) is provided in the plugging tube (6); the plugging head (8) is of a conical structure; the end surface area of ​​the plugging head (8) close to the connecting tube (5) is smaller than the end surface area of ​​the plugging head (8) away from the connecting tube (5).

4. A horizontal tube cooling system according to claim 3, characterized in that: A support plate (9) is fixed inside the plugging tube (6), and a guide rod (10) is fixed to the end of the plugging head (8) away from the connecting tube (5). The guide rod (10) can slidably penetrate the support plate (9), and a spring (11) is sleeved on the guide rod (10). One end of the spring (11) is fixedly connected to the plugging head (8), and the other end of the spring (11) is fixedly connected to the support plate (9). The spring (11) is a structure that always pushes the plugging head (8) to move toward the side close to the connecting tube (5).

5. A horizontal tube cooling system according to claim 4, characterized in that: A sleeve (12) is rotatably provided on the outer side of the connecting pipe (5), and the other end of the sleeve (12) is threadedly connected to the blocking pipe (6).

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