Primary cooler

Abstract

The invention relates to the technical field of coking heat exchange equipment, in particular to a primary cooler. Comprising a body, a coal gas outlet, a low-temperature water section tube bundle assembly, a low-temperature water section spraying assembly, a liquid breaking disc, a circulating water section tube bundle assembly, a circulating water section spraying assembly and a coal gas inlet, the body is vertically arranged, the gas outlet is fixedly connected to the bottom of the body, and the gas inlet is fixedly connected to the top of the body; the low-temperature water section tube bundle assembly, the low-temperature water section spraying assembly, the liquid breaking disc, the circulating water section tube bundle assembly and the circulating water section spraying assembly are installed in the body from bottom to top. The problems that the heat exchange area is increased due to the large size of the primary cooler, and the manufacturing and production cost is greatly improved are solved.

Description

Technical Field

[0001] The invention relates to the technical field of coking heat exchange equipment, in particular to a primary cooler. Background Art

[0002] The initial cooling process of coal gas is as follows: the coal gas from the coke oven at 80-82℃ is separated by the gas-liquid separator along the coal gas suction pipeline and enters the top of the horizontal tube coal gas primary cooler. After the coal gas is cooled to 21-22℃, it enters the electric tar collector to remove the tar mist entrained in the coal gas and further purify the coal gas. At the top of the primary cooler, the cleaning liquid is used to clean and flush the tar, naphthalene and other impurities on the outer wall of the heat exchange tube to achieve the effect of coal gas cooling in the primary cooler.

[0003] The large-scale coke oven means increasing the geometric dimensions and effective volume of the carbonization chamber to improve the production capacity of the coke oven. The large-scale coke oven is conducive to improving labor productivity, thermal efficiency, and economic benefits. It is also more beneficial to environmental protection. Therefore, the large-scale coke oven is the general trend of the development of world coking technology.

[0004] With the increase in the size of coke ovens and changes in coal loading methods, primary coolers will inevitably develop in the direction of large-scale. However, the large-scale primary cooler will cause a significant increase in the heat exchange area, resulting in a significant increase in manufacturing and production costs. Summary of the invention

[0005] In order to overcome the above-mentioned deficiencies of the prior art, the present invention provides a pre-cooler to solve the problem that the increase in heat exchange area caused by the large-scale pre-cooler causes a significant increase in manufacturing and production costs.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A primary cooler comprises a body, a gas outlet, a low-temperature water section tube bundle assembly, a low-temperature water section spray assembly, a liquid cut-off plate, a circulating water section tube bundle assembly, a circulating water section spray assembly and a gas inlet; the body is arranged vertically, the gas outlet is fixedly connected to the bottom of the body, and the gas inlet is fixedly connected to the top of the body; the low-temperature water section tube bundle assembly, the low-temperature water section spray assembly, the liquid cut-off plate, the circulating water section tube bundle assembly, and the circulating water section spray assembly are installed in the body from bottom to top.

[0008] Furthermore, the circulating water section spray assembly has the same structure as the low-temperature water section spray assembly, both of which include a spray pipe, on which a plurality of downward anti-blocking nozzles are provided, and the spray pipe is connected to a cleaning medium pipeline.

[0009] Furthermore, it also includes a first mounting tube, a second mounting tube, and a third mounting tube. The second mounting tube and the third mounting tube are fixedly connected to the side wall of the main body. Both ends of the spraying tube are installed in the first mounting tube and the second mounting tube. The first mounting tube and the third mounting tube are connected by a flange, and the spraying tube and the second mounting tube are connected by a flange.

[0010] Furthermore, a cleaning medium valve is provided on the cleaning medium pipeline, and a spraying liquid valve is provided at the end of the spraying pipe.

[0011] Furthermore, the low-temperature water section tube bundle assembly has the same structure as the circulating water section tube bundle assembly, both of which include multiple rows of tube bundles, which are equally spaced, parallel to each other, and arranged alternately in height; each row of tube bundles is winding multiple times, and its shape is like a snake, with a straight tube in the middle and curved tubes at both ends.

[0012] Furthermore, the two ends of the tube bundle of the low-temperature water section tube bundle assembly are respectively connected to the low-temperature water inlet and the low-temperature water outlet through connecting pipes; the two ends of the tube bundle of the circulating water section tube bundle assembly are respectively connected to the circulating water inlet and the circulating water outlet through connecting pipes; the tube bundle and the connecting pipe are threadedly connected.

[0013] Furthermore, it also includes a reinforcing plate, which is fixed between the upper and lower straight tubes of each row of tube bundles.

[0014] Furthermore, it also includes a support plate, which is arranged at the top and bottom ends of the tube bundle and is used to support the tube bundle. The support plate is provided with an arc-shaped notch corresponding to the straight tubes, and the straight tubes at the top and bottom ends of each column of the tube bundle are placed in the arc-shaped notch; the straight tubes of the tube bundles in three adjacent columns form a triangle, and the shape of the triangle is adjusted by the position of the arc-shaped notch.

[0015] Furthermore, the liquid cut-off plate includes an upper baffle, a first spray liquid outlet and a lower collecting plate; the upper baffle is an isosceles triangle, and the two bottom ends are provided with lower edges pointing vertically downward; the two lower collecting plates are downwardly inclined inclined plates, symmetrically arranged on both sides below the upper baffle, and the top is provided with an upper edge pointing vertically upward, and the upper edge is located inside the lower edge; the first spray liquid outlet is located at the bottom end of the lower collecting plate.

[0016] Furthermore, a second spray liquid outlet is provided at the bottom of the body, and the second spray liquid outlet is connected to the condensate tank pipeline.

[0017] Furthermore, it also includes a heating water section tube bundle assembly, and the heating water section tube bundle assembly is arranged above the circulating water section tube bundle assembly.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The low-temperature water section tube bundle assembly, the low-temperature water section spray assembly, the liquid cut-off plate, the circulating water section tube bundle assembly, and the circulating water section spray assembly of the present invention are installed in the body from bottom to top; the low-temperature water section spray assembly and the circulating water section spray assembly spray liquid downward, which not only plays a role in cleaning impurities such as naphthalene outside the tube bundle, but also directly exchanges heat with the coal gas to play a direct cooling role; the low-temperature water tube bundle and the circulating water tube bundle of the low-temperature water section tube bundle assembly and the circulating water section tube bundle assembly play an indirect cooling role, adopting direct cooling and indirect cooling by heat exchange pipes to improve the cooling effect and reduce the heat exchange area.

[0020] 2. The spray pipe of the present invention adopts an anti-blocking nozzle, and the spray pipe is connected to the cleaning medium pipeline, the cleaning medium pipeline is provided with a cleaning medium valve, forming a cleaning device, and the end of the spray pipe is provided with a spray liquid valve. Regularly opening the cleaning medium valve, closing the spray liquid valve, and cleaning the spray pipe can effectively prevent the primary cooler from being blocked and ensure the stable operation of the primary cooler.

[0021] 3. In the prior art, the heat exchange tubes of the primary cooler are welded by tube sheets and heat exchange tubes, with a tube box outside, and the tube sheets are relatively thick. The tube sheets do not exchange heat, and the cost is high. In the present invention, the multiple tube bundles are supported and fixed by support plates, and the reinforcing plates in each tube bundle are fixed between the upper and lower straight tubes of each tube bundle. On the one hand, the strength is increased, and on the other hand, the heat exchange area is increased, the heat exchange tube area is reduced, and the total height of the primary cooler is reduced. No tube box is required, which greatly reduces the cost.

[0022] 4. In the prior art, there are many leakage points in the welding between the heat exchange tube and the tube sheet of the primary cooler, which makes maintenance difficult. The tube bundle of the present invention is installed in the primary cooler body through the support plate and the connecting pipe, and has fewer direct connection points with the primary cooler body, which makes maintenance convenient.

[0023] 5. The support plate of the present invention is provided with arc-shaped notches corresponding to the straight tubes, and the straight tubes at the top and bottom of each tube bundle are placed in the arc-shaped notches; the straight tubes of the tube bundles of three adjacent columns form a triangle, and the shape of the triangle is adjusted by the position of the arc-shaped notches. Not only is the support stable, but also the vertical and horizontal spacing of the tube bundle can be adjusted.

[0024] 6. The present invention is provided with a liquid cut-off plate. After washing, the coal gas hits the upper baffle plate, flows downward along the downward edge, hits the lower collecting plate, and the coal gas enters the space between the two lower collecting plates and downward into the low-temperature water section; the spray liquid is discharged to the condensate tank through the spray liquid outlet, and is sent to the spray liquid inlet after separation and replenishment for recycling. By recycling and reusing the spray liquid, the consumption of resources and the burden on the environment can be significantly reduced.

[0025] 7. The bottom of the main body of the present invention is provided with a second spray liquid outlet, which is connected to the condensate tank pipeline. The spray liquid is collected at the bottom of the primary cooler and discharged to the condensate tank through the second spray liquid outlet. After separation and replenishment, the spray liquid is sent to the spray liquid inlet for recycling. By recycling and reusing the spray liquid, the consumption of resources and the burden on the environment can be significantly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic front view of the structure of the present invention.

[0027] Figure 2 for Figure 1 AA section view.

[0028] Figure 3 for Figure 1 BB cross-sectional view.

[0029] Figure 4 for Figure 1 CC cross-sectional view.

[0030] Figure 5 It is a schematic diagram of the support plate structure of the present invention.

[0031] Figure 6 It is a schematic diagram of the tube bundle structure of the present invention.

[0032] Figure 7 yes Figure 6 DD cross-sectional view.

[0033] Figure 8 It is a schematic diagram of the structure of the circulating water section spraying assembly and the low-temperature water section spraying assembly of the present invention.

[0034] In the figure: 1-body 11-wall plate 12-bottom plate 13-top plate 2-gas outlet 3-low temperature water section pipe bundle assembly 31-low temperature water inlet 32-low temperature water outlet 4-liquid cut-off plate 41-upper baffle 42-lower collecting plate 43-first spray liquid outlet 5-circulating water section pipe bundle assembly 51-circulating water inlet 52-circulating water outlet 53-connecting pipe 54-bend pipe 55-tube bundle 56-straight pipe 57-semi-circular arc bend pipe 58-reinforcement plate 59-support plate 510-support plate 511-bracket 512-semi-circular arc notch 6-circulating water section spray assembly 61-spray pipe 62-anti-blocking nozzle 63-first installation pipe 64-second installation pipe 65-third installation pipe 67-cleaning medium valve 68-spray liquid valve 7-gas inlet 8-low temperature water section spray assembly 101-diffusing port 102-manhole 103-second spray liquid outlet DETAILED DESCRIPTION

[0035] The embodiments of the present invention are described in detail below. In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described in combination with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the description of the present invention, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0039] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, the numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0040] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0041] [Example]

[0042] like Figure 1-8 As shown, a primary cooler includes a body 1, a gas outlet 2, a low-temperature water section tube bundle assembly 3, a low-temperature water section spray assembly 8, a liquid cut-off plate 4, a circulating water section tube bundle assembly 5, a circulating water section spray assembly 6 and a gas inlet 7.

[0043] The body 1 is a vertically arranged rectangular cylinder structure, and four wall panels 11 on the front, back, left and right sides form a rectangular cylinder. The wall panels 11 are vertically fixed to the bottom panel 12 , and the top panel 13 is fixed to the top of the wall panels 11 .

[0044] The gas inlet 7 is vertically arranged and fixed vertically to the center of the top plate 13. The discharge port 101 and the manhole 102 are fixed to the top plate 13 and are located on the left and right sides of the gas inlet 7. The gas outlet 2, the manhole 102 and the second spray liquid outlet 103 are located at the bottom of the precooler. The gas outlet 2 is horizontally fixed to the left wall plate, and the manhole 102 and the second spray liquid outlet 103 are fixed to the right wall plate.

[0045] The low-temperature water section tube bundle assembly 3, the low-temperature water section spray assembly 8, the liquid cut-off plate 4, the circulating water section tube bundle assembly 5, and the circulating water section spray assembly 6 are installed in the rectangular cylinder of the main body 1 from bottom to top.

[0046] like Figure 1 , Figure 3 , Figure 8As shown, the circulating water section spray assembly 6 has the same structure as the low-temperature water section spray assembly 8. In this embodiment, it is composed of six groups of spray assemblies arranged longitudinally front and back, each group of spray assemblies includes a spray pipe 61, the spray pipe 61 is arranged longitudinally, and is horizontally installed on the front and rear wall plates through the installation pipe. A plurality of downward anti-blocking nozzles 62 are evenly distributed on the spray pipe 61 located in the body 1. The circulating water section spray assembly 6 and the low-temperature water section spray assembly 8 spray liquid downward, which not only plays the role of cleaning naphthalene and other impurities outside the tube bundle, but also directly exchanges heat with the coal gas to play a direct cooling role.

[0047] The mounting pipes include a first mounting pipe 63, a second mounting pipe 64, and a third mounting pipe 65. The third mounting pipe 65 and the second mounting pipe 64 are fixedly connected to the front and rear side walls. The first mounting pipe 63 and the third mounting pipe 65 are connected by a flange. The inner diameters of the first mounting pipe 63 and the second mounting pipe 64 are slightly larger than the diameter of the spray pipe 61. The front and rear ends of the spray pipe 61 are respectively installed in the first mounting pipe 63 and the second mounting pipe 64. The second mounting pipe 64 is connected to the rear end of the spray pipe 61 by a flange.

[0048] A spraying liquid valve 68 is provided at the rear end of the spraying pipe 61, and the spraying liquid valve 68 is connected to the spraying liquid pipeline. The spraying pipe 61 is provided with a branch pipeline connected to the cleaning medium valve 67 to form a cleaning device. The cleaning medium valve 67 is connected to the cleaning medium pipeline. The spraying liquid is sprayed downward, which not only plays a role in cleaning impurities such as tar outside the pipe bundle, but also directly exchanges heat with the coal gas to play a direct cooling role. The cleaning medium is steam or washing oil. The cleaning medium valve 67 is opened regularly, the spraying liquid valve 68 is closed, and the spraying pipe 61 is cleaned; in normal operation, the cleaning medium valve 67 is closed and the spraying liquid valve 68 is opened.

[0049] like Figure 1 , Figure 4-7 As shown, the low-temperature water section tube bundle assembly 3 has the same structure as the circulating water section tube bundle assembly 5, including multiple rows of tube bundles. In this embodiment, there are 6 rows of tube bundles. The 6 rows of tube bundles are arranged at equal intervals and parallel to each other. The first, third and fifth rows of tube bundles have the same height, and the second, fourth and sixth rows of tube bundles have the same height. The first, third and fifth rows of tube bundles are lower than the second, fourth and sixth rows of tube bundles.

[0050] The two ends of the tube bundle of the low-temperature water section tube bundle assembly are respectively connected to the low-temperature water inlet 31 and the low-temperature water outlet 32 ​​through the connecting pipe 53 and the elbow 54. The two ends of the tube bundle of the circulating water section tube bundle assembly are respectively connected to the circulating water inlet 51 and the circulating water outlet 52 through the connecting pipe 53 and the elbow 54. The connecting pipe 53 is fixed to the wall plate 12, one end of the connecting pipe 53 is threadedly connected to the tube bundle, and the other end of the connecting pipe 53 is welded to the elbow 54.

[0051] Each row of tube bundles 55 meanders several times and is shaped like a snake, with equal spacing, parallel, horizontal straight tubes 56 in the middle and semicircular curved tubes 57 at both ends. A reinforcing plate 58 is fixed between the upper and lower straight tubes 56 of each row of tube bundles, and the reinforcing plate 58 plays a reinforcing role, improving the stability of the tube bundle 55 and also increasing the heat exchange area.

[0052] The multiple rows of tube bundles are installed in the body 1 through the support plates 59, the support plates 510 and the brackets 511. The two support plates 59 are respectively arranged at the top and bottom of the tube bundle 55 to support the tube bundle 55. The two support plates 510 are respectively fixed to the front and rear wall plates, located above the tube bundle, and the front and rear ends of the support plate 59 are respectively fixed to the two support plates 510, and the support plate 59 is longitudinally and horizontally fixed in the body 1, located above the tube bundle. The two brackets 511 are respectively fixed to the front and rear wall plates, located below the tube bundle, and the front and rear ends of the support plate 59 are respectively fixed to the two brackets 511, and the support plate 59 is longitudinally and horizontally fixed in the body 1, located below the tube bundle.

[0053] The support plate 59 is provided with semicircular notches 512 of different heights corresponding to the straight tubes 56, and the straight tubes at the top and bottom of each tube bundle are placed in the semicircular notches 512. The straight tubes of three adjacent tube bundles form an isosceles triangle, and the shape of the triangle is adjusted by the position of the semicircular notches 512.

[0054] The liquid cut-off plate includes an upper baffle 41, a first spray liquid outlet 43 and a lower collecting plate 42. The upper baffle 41 is an isosceles triangle, and the two bottom ends are provided with lower edges pointing vertically downward. The two lower collecting plates 42 are downwardly inclined inclined plates, and the two lower collecting plates 42 are symmetrically arranged on both sides below the upper baffle 41. The two lower collecting plates 42 are in an eight-shaped shape, and the top of the lower collecting plate 42 is provided with an upper edge pointing vertically upward, and the upper edge is located inside the lower edge. The first spray liquid outlet 43 is located at the bottom end of the lower collecting plate 42. After washing, the coal gas hits the upper baffle 41, flows downward along the downward straight edge section space, hits the lower collecting plate 42, and the coal gas enters the space between the lower collecting plates 42, and enters the low-temperature water section tube bundle assembly 3 downward. The spray liquid is discharged to the condensate tank through the first spray liquid outlet 43, and is sent to the spray liquid valve 68 after separation and replenishment of the spray liquid for recycling.

[0055] In addition to the low-temperature water section and the circulating water section, the primary cooler can also add a heating water section on top of the circulating water section.

[0056] The working principle and working process of the present invention are as follows:

[0057] The coal gas enters the coal gas inlet 7 and contacts the spray liquid sprayed downward by the anti-blocking nozzle 62 of the spray pipe 61, realizing direct gas-liquid cooling. The coal gas flows downward and passes through the tube bundle 55. The coal gas indirectly exchanges heat with the circulating water in the tube bundle. At the same time, the spray liquid is also sprayed onto the outer wall of the tube bundle. On the one hand, it cleans the tar and other impurities on the outside of the heat exchange tube. On the other hand, the spray liquid exchanges heat with the circulating water outside the tube bundle. The coal gas flushes the spray liquid, which also plays a direct cooling role.

[0058] A reinforcing plate 58 is used between the heat exchange tubes of the tube bundle. The reinforcing plate 58 plays a reinforcing role and also plays a heat exchange role, reducing the heat exchange area of ​​the primary cooler. The coal gas cooled by the circulating water enters the liquid cut-off plate 4. After washing, the coal gas hits the upper baffle 41, flows downward along the downward straight edge section space, hits the lower collecting plate 42, and enters the space between the lower collecting plates 42, and enters the low-temperature water section downward. The spray liquid is discharged to the condensate tank through the first spray liquid outlet 43, and is sent to the spray liquid valve 68 after separation and replenishment of the spray liquid for recycling.

[0059] The coal gas flows downward, and the coal gas indirectly exchanges heat with the low-temperature water in the tube bundle. At the same time, the spray liquid is also sprayed on the outer wall of the tube bundle. On the one hand, it cleans the impurities such as naphthalene on the outside of the heat exchange tube. On the other hand, the spray liquid exchanges heat with the low-temperature water outside the tube bundle. The coal gas flushes the spray liquid, which also plays a direct cooling role. A reinforcing plate 58 is used between the heat exchange tubes in the tube bundle. The reinforcing plate 58 plays a reinforcing role and also plays a heat exchange role, reducing the heat exchange area of ​​the primary cooler. The spray liquid is collected at the bottom of the primary cooler and discharged into the condensate tank through the second spray liquid outlet 103. After separation and replenishment of the spray liquid, it is sent to the spray liquid valve 68 for recycling. The cooled coal gas, with a temperature of about 21-22°C, enters the electric tar precipitator for the next purification step.

[0060] The spray liquid of the present invention is in direct contact with the coal gas, and adopts direct cooling and indirect cooling through heat exchange tubes, which improves the cooling effect and reduces the heat exchange area. The spray tube adopts a cleaning structure to ensure the stable operation of the pre-cooler. The heat exchanger tube bundle adopts straight tube sections and elbows for welding, and reinforcing plates 58 are added between the straight tube sections. On the one hand, it increases the strength, and on the other hand, it increases the heat exchange area, reduces the heat exchange tube area, and reduces the total height of the pre-cooler. The original pre-cooler heat exchange tubes were welded with tube sheets and heat exchange tubes, and there was a tube box on the outside. The tube sheet was relatively thick. The outer shell of the pre-cooler of the present invention only needs to meet the strength requirements, the shell thickness is relatively thin, and no tube box is required, and the cost is low. The existing pre-cooler heat exchange tube and tube sheet welding has many leakage points, which is difficult to repair. The tube bundle of the present invention is easy to detect and pressurize after welding, and has few connection points with the pre-cooler shell, which is convenient for maintenance.

[0061] The above descriptions are only some specific implementation methods of the present invention, and the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, and they should be covered by the protection scope of the present invention.

Claims

1. A primary cooler, characterized in that: It includes the main body, gas outlet, low-temperature water section pipe bundle assembly, low-temperature water section spray assembly, liquid cut-off plate, circulating water section pipe bundle assembly, circulating water section spray assembly and gas inlet; The body is arranged vertically, the gas outlet is fixedly connected to the bottom of the body, and the gas inlet is fixedly connected to the top of the body; The low-temperature water section pipe bundle assembly, the low-temperature water section spray assembly, the liquid cut-off plate, the circulating water section pipe bundle assembly, and the circulating water section spray assembly are installed in the main body from bottom to top.

2. A primary cooler according to claim 1, characterized in that: The circulating water section spray assembly has the same structure as the low-temperature water section spray assembly, and both include a spray pipe, on which a plurality of downward spray heads are provided, and the spray pipe is connected to a cleaning medium pipeline.

3. A primary cooler according to claim 2, characterized in that: It also includes a first mounting tube, a second mounting tube, and a third mounting tube. The second mounting tube and the third mounting tube are fixedly connected to the side wall of the main body. Both ends of the spraying tube are installed in the first mounting tube and the second mounting tube. The first mounting tube and the third mounting tube are connected by a flange, and the spraying tube and the second mounting tube are connected by a flange.

4. A primary cooler according to claim 2, characterized in that: The cleaning medium pipeline is provided with a cleaning medium valve, and the end of the spraying pipe is provided with a spraying liquid valve.

5. A primary cooler according to claim 1, characterized in that: The low-temperature water section tube bundle assembly has the same structure as the circulating water section tube bundle assembly, both of which include multiple rows of tube bundles, which are equally spaced, parallel to each other, and arranged alternately in high and low positions; Each row of tube bundles meanders many times and is shaped like a snake, with a straight tube in the middle and curved tubes at both ends.

6. A primary cooler according to claim 5, characterized in that: The two ends of the tube bundle of the low-temperature water section tube bundle assembly are respectively connected to the low-temperature water inlet and the low-temperature water outlet through connecting pipes; the two ends of the tube bundle of the circulating water section tube bundle assembly are respectively connected to the circulating water inlet and the circulating water outlet through connecting pipes; the tube bundle and the connecting pipe are threadedly connected.

7. A primary cooler according to claim 5, characterized in that: It also includes a reinforcing plate, which is fixed between the upper and lower straight tubes of each row of tube bundles.

8. A primary cooler according to claim 5, characterized in that: It also includes a support plate, which is arranged at the top and bottom ends of the tube bundle and is used to support the tube bundle. The support plate is provided with an arc-shaped notch corresponding to the straight tubes, and the straight tubes at the top and bottom ends of each column of the tube bundle are placed in the arc-shaped notch; the straight tubes of the tube bundles in three adjacent columns form a triangle, and the shape of the triangle is adjusted by the position of the arc-shaped notch.

9. A primary cooler according to claim 1, characterized in that: The liquid cut-off plate includes an upper baffle, a first spray liquid outlet and a lower collecting plate; the upper baffle is an isosceles triangle, and the two bottom ends are provided with lower edges pointing vertically downward; the two lower collecting plates are downwardly inclined inclined plates, symmetrically arranged on both sides below the upper baffle, and the top ends are provided with upper edges pointing vertically upward, and the upper edges are located inside the lower edges; the first spray liquid outlet is located at the bottom end of the lower collecting plate.

10. A primary cooler according to claim 1, characterized in that: A second spray liquid outlet is provided at the bottom of the body, and the second spray liquid outlet is connected to the condensate tank pipeline.

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