Anti-blocking coal gas primary cooler

Abstract

The invention relates to the technical field of gas primary coolers, in particular to an anti-blocking gas primary cooler. The device is of a vertical structure, comprises a coal gas washing section, a low-temperature water section, a circulating water section and a coal gas equalizing section which are fixedly connected in sequence from bottom to top, and further comprises an ammonia water tank connected with a coal gas washing section pipeline, the coal gas washing section is provided with an ammonia water spraying pipe, and coal gas is washed by ammonia water; the coal gas washing section is connected with the coal gas equalizing section through a coal gas connecting pipeline, and washed coal gas without impurities enters the coal gas equalizing section through a pipeline; the coal gas is provided with a horizontal main pipe and a plurality of branch pipes symmetrically arranged on the two sides of the main pipe in a segmented mode, and the coal gas evenly enters the primary cooler through the branch pipes. The impurity content in the gas is reduced and the gas primary cooler is prevented from being blocked.

Description

Technical Field

[0001] The invention relates to the technical field of coal gas primary coolers, in particular to an anti-clogging coal gas primary cooler. Background Art

[0002] After the coke oven gas is cooled by the gas collecting pipe, the temperature is still high and contains a large amount of harmful substances such as ammonia and naphthalene. It needs to be initially purified by a cooler and the gas dew point is further reduced to facilitate the stable operation of the subsequent gas purification device. The gas from the coke oven at 80-82°C is separated by a gas-liquid separator along the gas suction pipeline and enters the top of the horizontal tube gas primary cooler. After the gas is cooled to 21-22°C, it enters the electric tar precipitator to remove the tar mist entrained in the gas and further purify the gas.

[0003] The existing coal gas primary cooler uses cleaning fluid to clean and flush the tar, naphthalene and other impurities on the outer wall of the heat exchange tube at the top of the primary cooler to achieve the effect of cooling the coal gas in the primary cooler. However, with the large-scale coke oven and the change of coal loading method, the uneven distribution of coal gas inlet caused by the large-scale primary cooler leads to the reduction of heat exchange effect and the increase of coal powder in the coal gas, which causes serious blockage of the primary cooler and affects the operation of the primary cooler. Summary of the invention

[0004] In order to overcome the above-mentioned deficiencies of the prior art, the present invention provides an anti-clogging coal gas primary cooler, which reduces the impurity content in the coal gas and avoids clogging of the coal gas primary cooler.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A blockage-proof coal gas primary cooler is a vertical structure, comprising a coal gas washing section, a low-temperature water section, a circulating water section and a coal gas equalizing section fixedly connected in sequence from bottom to top, and also comprising an ammonia tank connected to the coal gas washing section pipeline; the coal gas washing section is provided with an ammonia spraying pipe, and the coal gas is washed with ammonia; the coal gas washing section is connected to the coal gas equalizing section through a coal gas connecting pipeline, and the coal gas from which impurities are removed after washing enters the coal gas equalizing section through the pipeline; the coal gas equalizing section is provided with a horizontal main pipe and a plurality of branch pipes symmetrically arranged on both sides of the main pipe, and the coal gas enters the interior of the primary cooler evenly through the branch pipes.

[0007] Furthermore, a flange and a flange cover are provided at one end of the horizontal main pipe for evenly dividing the gas into sections, and the other end is connected to the gas outlet of the gas washing section through a gas connecting pipe; the top of the main pipe is aligned with the top of the branch pipe.

[0008] Furthermore, the gas connecting pipeline includes an elbow, a top straight pipe section, an inclined pipe section and a bottom straight pipe section which are connected in sequence from top to bottom; the elbow is connected to the main pipe, and the bottom straight pipe section is connected to the gas outlet.

[0009] Furthermore, the gas washing section includes a main body and a partition, a gas inlet, a baffle, an ammonia spray pipe and a gas outlet installed on the main body; the partition is horizontally fixed to the main body and is located in the middle; the baffle is located below the partition, and is arranged alternately up and down, and an ammonia spray pipe is arranged between the baffles, and the ammonia spray pipe is provided with a nozzle; the gas passing through the gas inlet passes through the baffle and is deflected at the bottom of the pre-cooler, and is continuously in contact with the sprayed ammonia, and the gas with some impurities removed enters the gas connecting pipe through the gas outlet.

[0010] Furthermore, it also includes a manhole, a cleaning liquid outlet and an ammonia water outlet fixedly connected to the main body; the cleaning liquid outlet is located above the partition.

[0011] Furthermore, it also includes a heat insulation material, which is installed at the lower part of the partition.

[0012] Furthermore, the nozzle is an anti-clogging nozzle.

[0013] Furthermore, the ammonia water tank comprises a first ammonia water inlet, a cylinder, a second ammonia water inlet, a left head, a right head, an ammonia water outlet and a vertical partition; the axis of the cylinder is horizontal, and the left head and the right head are fixedly connected to the two ends of the cylinder; the first ammonia water inlet is fixedly connected to the left head, and the first ammonia water inlet is connected to the ammonia water outlet pipe; the second ammonia water inlet is fixedly connected to the cylinder, and the second ammonia water inlet is connected to the ammonia water pipe; the ammonia water outlet is fixedly connected to the right head, and the ammonia water outlet is connected to the ammonia water spray pipe pipe; the vertical partition is fixedly connected to the inner wall of the cylinder and is located in the middle.

[0014] Furthermore, it also includes an ammonia water pump, which is installed on a pipeline connecting the ammonia water outlet and the ammonia water spraying pipe.

[0015] Furthermore, it also includes a vent, which is fixed to the bottom of the cylinder.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The bottom of the primary cooler of the present invention is a gas washing section, and the gas washing section is provided with an ammonia water spraying pipe. Ammonia water is used to wash the gas at the bottom to reduce the impurity content in the gas and avoid clogging of the gas primary cooler.

[0018] 2. The top of the present invention is a gas-evenly segmented structure, which is provided with a horizontal main pipe and multiple branch pipes symmetrically arranged on both sides of the main pipe. The gas enters the primary cooler evenly through the branch pipes. The gas is evenly distributed when entering the primary cooler. At the same time, the tops of the branch pipes are aligned, and the tops also have the function of removing impurities. Impurities such as coal powder are deposited at the bottom of the main pipe and can be removed by opening the flange cover.

[0019] 3. The heat insulation material of the present invention is installed at the lower part of the horizontal partition to prevent the temperature of the ammonia water from affecting the temperature of the cleaning liquid and the gas temperature.

[0020] 4. The nozzle of the present invention adopts an anti-blocking nozzle to ensure the stable operation of the ammonia water spraying system.

[0021] 5. The present invention has a vertical structure, the equipment is simple and compact, and the floor space is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic front view of the structure of the present invention.

[0023] Figure 2 for Figure 1 AA section view.

[0024] Figure 3 for Figure 1 BB cross-sectional view.

[0025] In the figure: 1-gas washing section 2-low temperature water section 3-circulating water section 4-gas equal distribution section 5-ammonia tank 6-gas connecting pipe 11-front and rear wall panels 12-left and right wall panels 13-bottom plate 14-partition 15-gas inlet 16-baffle 17-ammonia spray pipe 18-gas outlet 19-insulation material 110-sprinkler 111-manhole 112-cleaning liquid outlet 113-ammonia outlet 41-spraying liquid inlet 42-main pipe 43-branch pipe 44-flange 45-flange cover 51-first ammonia inlet 52-cylinder 53-second ammonia inlet 54-left head 55-right head 56-ammonia outlet 57-vertical partition 58-ammonia pump 59-vent 61-elbow 62-top straight pipe section 63-oblique pipe section 64-bottom straight pipe section DETAILED DESCRIPTION

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] like Figure 1-3 As shown, an anti-clogging gas primary cooler is a vertical structure, including a gas washing section 1, a low-temperature water section 2, a circulating water section 3 and a gas equalization section 4 fixedly connected from bottom to top, and also includes an ammonia water tank 5 connected to the gas washing section pipeline.

[0033] The main body of the gas washing section 1 includes front and rear wall plates 11, left and right wall plates 12 and a bottom plate 13. The bottom plate 13 is a horizontal plate. The front and rear wall plates 11, left and right wall plates 12 are welded to form a rectangular cylinder, which is vertically fixed to the bottom plate 13.

[0034] The gas washing section 1 further includes a partition 14 , a gas inlet 15 , a baffle 16 , an ammonia water spraying pipe 17 , a gas outlet 18 , a heat insulating material 19 , a nozzle 110 , a manhole 111 , a cleaning liquid outlet 112 and an ammonia water outlet 113 .

[0035] The partition 14 is fixed horizontally in the body and is located in the middle. The manhole 111 is fixed to the left and right wall panels 12, and the cleaning liquid outlet 112 is fixed to the front and rear wall panels 11 and is located above the partition 14. The cleaning liquid is discharged through the cleaning liquid outlet 112. The gas inlet 15 and the gas outlet 18 are located below the partition 14. The gas inlet 15 is fixed to the right wall panel, and the gas outlet 18 is fixed to the front side wall panel. Two ammonia water outlets 113 are fixed to the front side wall panel and are located at the bottom.

[0036] The baffles 16 are arranged in an alternating manner up and down. In this embodiment, there are three baffles 16, one baffle 16 is fixed to the center of the bottom plate 13, and the other two baffles 16 are fixed to the bottom surface of the partition 14, and are located on both sides of the baffle 16 fixed to the bottom plate 13. An ammonia water spraying pipe 17 is arranged between the baffles 16, and a nozzle 110 is arranged on the ammonia water spraying pipe 17. The nozzle 110 is an anti-blocking nozzle to ensure the stable operation of the ammonia water spraying system. In this embodiment, a total of 4 ammonia water spraying pipes 17 are arranged. The nozzle 110 sprays ammonia water evenly on the coal gas to remove impurities such as coal powder entrained in the coal gas.

[0037] The heat insulation material 19 is installed at the bottom of the horizontal partition 14 to prevent the ammonia temperature from affecting the cleaning liquid temperature and the gas temperature. The gas passing through the gas inlet 15 passes through the baffle 16 and is diverted at the bottom of the primary cooler, and is constantly in contact with the sprayed ammonia. The gas with some impurities removed enters the gas connection pipe 6 through the gas outlet 18.

[0038] The gas evenly distributing section 4 is located at the top of the primary cooler. The main body of the gas evenly distributing section 4 comprises a rectangular cylinder. The front side plate of the rectangular cylinder is provided with a spray liquid inlet 41. The cover plate is fixed to the top of the rectangular cylinder.

[0039] The gas distribution section 4 includes a main pipe 42 with a horizontal axis, and the main pipe 42 is located at the center above the cover plate. In this embodiment, two branch pipes 43 are respectively arranged on the left and right sides of the main pipe 42. The top of the main pipe 42 is aligned with the top of the branch pipe 43.

[0040] One end of the main pipe 42 is provided with a flange 44 and a flange cover 45, and the other end is connected to the gas outlet 18 of the gas washing section 1 through the gas connecting pipe 6. Some impurities such as coal powder are deposited at the bottom of the horizontal main pipe 42, which can be removed by opening the flange cover 44. Multiple branch pipes 43 enter the top of the primary cooler to ensure that the gas enters the primary cooler evenly.

[0041] The gas connecting pipeline 6 includes an elbow 61 , a top straight pipe section 62 , an inclined pipe section 63 and a bottom straight pipe section 64 which are connected in sequence from top to bottom; the elbow 61 is connected to the main pipe 42 , and the bottom straight pipe section 64 is connected to the gas outlet 18 .

[0042] The ammonia water tank 5 includes a first ammonia water inlet 51 , a cylinder 52 , a second ammonia water inlet 53 , a left end cap 54 , a right end cap 55 , an ammonia water outlet 56 , a vertical partition 57 , an ammonia water pump 58 , a vent 59 and a manhole 111 .

[0043] The axis of the cylinder 52 is horizontal, the left head 54 and the right head 55 are fixedly connected to the left and right ends of the cylinder 52, and the support is fixedly connected to the bottom of the cylinder 52 to support the cylinder.

[0044] The first ammonia water inlet 51 is fixed to the left end cap 54 and connected to the ammonia water outlet 113 through a pipeline. The first ammonia water inlet 51 is lower than the ammonia water outlet 113. The second ammonia water inlet 53 is connected to the ammonia water pipeline for supplementary ammonia water from the tank area.

[0045] The ammonia water outlet 56 is fixed to the lower part of the right end cap 55, and the ammonia water outlet 56 is connected to the ammonia water spraying pipe 17. The ammonia water pump 58 is installed on the pipe connecting the ammonia water outlet 56 and the ammonia water spraying pipe 17. The vertical partition 57 is fixed to the inner wall of the cylinder 52 and is located in the middle. A vent 59 is set on each side of the vertical partition 57, and the vent 59 is fixed to the bottom of the outer wall of the cylinder 52.

[0046] The first ammonia water inlet 51 is connected to the ammonia water outlet 113. The ammonia water with impurities such as coal powder in the primary cooler enters the ammonia water tank 5 and is deposited on the left side of the vertical partition 57. After the impurities at the bottom are deposited, they are sent to the tar ammonia water separation section through the left vent 59. The top ammonia water flows to the right side of the vertical partition 57 and is sent to the ammonia water spraying pipe 17 for recycling through the ammonia water pump 58. The bottom sediment is sent to the tar ammonia water separation section through the right vent 59. The second ammonia water inlet 5 is supplemented with ammonia water from the tank area to meet the requirements of the circulating spraying amount.

[0047] The working principle and working process of the present invention are as follows:

[0048] The coal gas passing through the coal gas inlet 15 is diverted through the baffle 16 at the bottom of the primary cooler. The baffles 16 are arranged alternately up and down. Ammonia spraying pipes 17 are arranged between the baffles 16. The spraying pipes are provided with nozzles 110. Ammonia is evenly sprayed on the coal gas to remove impurities such as coal powder entrained in the coal gas.

[0049] The gas with some impurities removed enters the gas connection pipe 6 through the gas outlet 18. The horizontal partition 14 is welded to the front and rear wall panels 11 and the left and right wall panels 12, and the cleaning liquid is discharged through the cleaning liquid outlet 112. The heat insulation material 19 is installed at the bottom of the horizontal partition 14 to prevent the ammonia temperature from affecting the cleaning liquid temperature and the gas temperature.

[0050] The first ammonia water inlet 51 is connected to the ammonia water outlet 113. The ammonia water with impurities such as coal powder in the primary cooler enters the ammonia water tank 5 and is deposited on the left side of the vertical partition 57. After the impurities at the bottom are deposited, they are sent to the tar ammonia water separation section through the left vent 59. The top ammonia water flows to the right side of the vertical partition 57 and is sent to the ammonia water spraying pipe 17 for recycling through the ammonia water pump 58. The bottom sediment is sent to the tar ammonia water separation section through the right vent 59. The second ammonia water inlet 5 is supplemented with ammonia water from the tank area to meet the requirements of the circulating spraying amount.

[0051] The branch pipe 43 is aligned with the top of the main pipe 42. Some impurities such as coal powder are deposited at the bottom of the main pipe 42 and are removed by opening the flange cover 45. Multiple branch pipes 43 enter the top of the primary cooler to ensure that the coal gas enters the primary cooler evenly. Inside the primary cooler, the coal gas passes through the circulating water section and the low-temperature water section, and the coal gas temperature drops to 21-22°C. It is then sent to the electric tar precipitator to remove tar mist and dust particles for further purification.

[0052] The present invention adopts ammonia water to wash the coal gas at the bottom to reduce the impurity content in the coal gas. A coal gas uniform distribution device is adopted at the top to ensure that the coal gas is evenly distributed when entering the primary cooler. At the same time, the top of the branch pipe is aligned, and the top also has the function of removing impurities. It is simple and compact, and reduces the space occupied.

[0053] 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. An anti-clogging gas primary cooler, characterized in that: The coal gas primary cooler is a vertical structure, including a coal gas washing section, a low temperature water section, a circulating water section and a coal gas section fixedly connected from bottom to top, and also includes an ammonia water tank connected to the coal gas washing section pipeline; The gas washing section is provided with an ammonia water spraying pipe, and the gas is washed with ammonia water; the gas washing section is connected to the gas equalization section through a gas connecting pipeline, and the gas after washing and removing impurities enters the gas equalization section through the pipeline; The coal gas is evenly divided into sections and provided with a horizontal main pipe and a plurality of branch pipes symmetrically arranged on both sides of the main pipe, and the coal gas evenly enters the interior of the primary cooler through the branch pipes.

2. The anti-clogging gas primary cooler according to claim 1, characterized in that: One end of the horizontal main pipe for evenly dividing the gas into sections is provided with a flange and a flange cover, and the other end is connected to the gas outlet of the gas washing section through a gas connecting pipeline; the top of the main pipe is aligned with the top of the branch pipe.

3. The anti-clogging gas primary cooler according to claim 2, characterized in that: The gas connecting pipeline comprises an elbow, a top straight pipe section, an inclined pipe section and a bottom straight pipe section which are connected in sequence from top to bottom; the elbow is connected to the main pipe, and the bottom straight pipe section is connected to the gas outlet.

4. The anti-clogging gas primary cooler according to claim 1, characterized in that: The gas washing section comprises a body and a partition plate installed on the body, a gas inlet, a baffle, an ammonia water spraying pipe and a gas outlet; The partition is fixedly connected to the body horizontally and located in the middle; the baffle is located below the partition and arranged in an alternating manner up and down; an ammonia spray pipe is arranged between the baffles, and a nozzle is arranged on the ammonia spray pipe; The coal gas passing through the coal gas inlet is diverted through the baffle at the bottom of the primary cooler and continuously contacts with the sprayed ammonia water. The coal gas with some impurities removed enters the coal gas connecting pipeline through the coal gas outlet.

5. The anti-clogging coal gas primary cooler according to claim 4, characterized in that: It also includes a manhole, a cleaning liquid outlet and an ammonia water outlet which are fixedly connected to the main body; the cleaning liquid outlet is located above the partition.

6. The anti-clogging gas primary cooler according to claim 4, characterized in that: It also includes a heat insulating material, which is installed at the lower part of the partition.

7. The anti-clogging gas primary cooler according to claim 4, characterized in that: The nozzle is an anti-blocking nozzle.

8. The anti-clogging coal gas primary cooler according to claim 4, characterized in that: The ammonia water tank comprises a first ammonia water inlet, a cylinder, a second ammonia water inlet, a left end cap, a right end cap, an ammonia water outlet and a vertical partition; The axis of the cylinder is horizontal, and the left and right heads are fixedly connected to both ends of the cylinder; The first ammonia water inlet is fixedly connected to the left end cap, and the first ammonia water inlet is connected to the ammonia water outlet pipe; The second ammonia water inlet is fixedly connected to the cylinder, and the second ammonia water inlet is connected to the ammonia water pipeline; The ammonia water outlet is fixedly connected to the right end cap, and the ammonia water outlet is connected to the ammonia water spraying pipe; The vertical partition is fixed to the inner wall of the cylinder and is located in the middle.

9. The anti-clogging coal gas primary cooler according to claim 8, characterized in that: The utility model also comprises an ammonia water pump, which is installed on a pipeline connecting an ammonia water outlet and an ammonia water spraying pipe.

10. The anti-clogging coal gas primary cooler according to claim 8, characterized in that: It also includes a vent, which is fixed to the bottom of the cylinder.

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