A lube oil cooler and method of using the same

Abstract

The present application relates to a kind of primary coolers and its use method, including primary cooler side plate, primary cooler cover plate and primary cooler bottom plate, the primary cooler side plate, primary cooler cover plate and primary cooler bottom plate constitute primary cooler shell, still including gas outlet, low-temperature water section, circulating water section, spray liquid inlet, gas connecting pipeline, gas purifier and gas scrubber, circulating water section and low-temperature water section are sequentially arranged between primary cooler top to primary cooler bottom, the gas outlet is arranged in primary cooler bottom, and the spray liquid inlet is arranged in primary cooler top;The gas connecting pipeline, gas purifier and gas scrubber are arranged in primary cooler outside, the bottom of the gas connecting pipeline is inserted into gas purifier, and the gas scrubber is communicated with the side wall of gas purifier by the gas connecting pipeline insertion section;The present application reduces the impurity content in gas, evenly arranges gas in primary cooler top, ensures that gas enters primary cooler distribution evenly, equipment is simple and compact, and reduces footprint.

Description

Technical Field

[0001] This invention relates to the field of heat exchange equipment technology, and in particular to a primary cooler and its usage method. Background Technology

[0002] Coal gas from the coke oven at 80-82°C is separated by a gas-liquid separator along the gas intake pipe and then enters the top of a horizontal tube-type primary gas cooler. After being cooled to 21-22°C, the gas enters an electrostatic precipitator to remove tar mist entrained in the gas, undergoing further purification. At the top of the primary cooler, a cleaning fluid is used to wash away tar, naphthalene, and other impurities from the outer wall of the heat exchange tubes, achieving the desired cooling effect. However, with the increasing size of coke ovens and changes in coal charging methods, the uneven distribution of gas at the primary cooler inlet, caused by larger primary coolers, leads to reduced heat exchange efficiency and increased coal dust in the gas, resulting in severe blockage of the primary cooler and affecting its operation. Summary of the Invention

[0003] This invention provides a primary cooler and its usage method. The bottom of the primary cooler is washed with ammonia water to reduce the impurity content in the gas. The top of the primary cooler is used to evenly distribute the gas to ensure that the gas enters the primary cooler in a uniform manner. The equipment is simple and compact, reducing the footprint.

[0004] To achieve the above objectives, the present invention employs the following technical solution:

[0005] A primary cooler includes a primary cooler side plate, a primary cooler cover plate, and a primary cooler bottom plate. The primary cooler side plate, primary cooler cover plate, and primary cooler bottom plate constitute the primary cooler shell. It also includes a gas outlet, a low-temperature water section, a circulating water section, a spray liquid inlet, a gas connection pipe, a gas purifier, and a gas scrubber. The circulating water section and the low-temperature water section are arranged sequentially from the top to the bottom of the primary cooler. The gas outlet is located at the bottom of the primary cooler, and the spray liquid inlet is located at the top of the primary cooler. The gas connection pipe, the gas purifier, and the gas scrubber are located outside the primary cooler. The bottom of the gas connection pipe is inserted into the gas purifier, and the gas scrubber is connected to the side wall of the section of the gas purifier into which the gas connection pipe is inserted.

[0006] Furthermore, the gas connection pipeline includes a flange cover, flange a, a branch pipe, a riser, a folding plate, and an arc plate. The bottom of the riser is inserted into the gas purifier. The flange cover is located on the top of the riser through flange a. The branch pipes are branched out from the riser and enter the primary cooler. The folding plate is a roof-shaped folding plate and is located under the cover of the primary cooler. The branch pipe entering the primary cooler is located between the folding plate and the top cover of the primary cooler. The two ends of the folding plate are welded to the side plates of the primary cooler. The two ends of the arc plate are welded to the folding plate and the cover of the primary cooler.

[0007] Furthermore, the gas scrubber includes a flange b, a vertical straight pipe section, an elbow, a horizontal straight pipe section, a nozzle, a mounting hole, an ammonia inlet, and an ammonia pump. The flange b is located at the top of the vertical straight pipe section, the elbow is connected to the bottom of the vertical straight pipe section, the elbow is connected to the horizontal straight pipe section, the horizontal straight pipe section is connected to the side wall of the gas purifier inserted by the gas connection pipe, the nozzle is located inside the vertical straight pipe section, and the nozzle spray direction is towards the top of the vertical straight pipe section. The ammonia inlet is connected to the nozzle through the mounting hole, and the ammonia inlet is connected to the ammonia pump through a pipe.

[0008] Furthermore, the gas purifier includes a cover plate, a cylinder, a conical section, a bottom cylinder, a gas-liquid separator, a supplementary ammonia inlet, an ammonia outlet, a baffle plate, a head, vent port a, vent port b, and a skirt. The cover plate covers the top of the cylinder, the conical section is located inside the cylinder, the conical section is located at the top of the bottom cylinder, the gas-liquid separator is located inside the conical section, the head is located between the cylinder and the bottom of the bottom cylinder, the bottom of the head is provided with vent port a and vent port b, the upper part of the head is provided with a baffle plate, the bottom of the cylinder is lower than the top of the baffle plate, the side wall of the cylinder is provided with a supplementary ammonia inlet and an ammonia outlet, the ammonia outlet is connected to an ammonia pump through a pipe, and the bottom of the head is provided with a skirt.

[0009] Furthermore, the nozzle is a dynamic wave nozzle.

[0010] Furthermore, ammonia water from the bottom of the gas purifier is pumped into the ammonia water inlet. The gas enters the gas scrubber, where it contacts the ammonia water at the nozzles in a counter-current manner in the vertical straight pipe section. The gas then enters the cylinder tangentially along the horizontal straight pipe section. The gas flow spirals downwards along the inner wall of the cylinder, flowing towards the cone, throwing particles such as ammonia water and coal dust, whose relative density is greater than that of the gas, towards the inner wall of the cylinder and into the ammonia water outlet. The gas then reaches the conical gas-liquid separator, where it reverses direction and flows upwards through the riser, then into the branch pipes, baffles, and arc sections. The gas distribution system formed by the shaped plate inside the primary cooler is sent to the primary cooler for gas cooling. After separation, ammonia water and coal powder enter the cylinder. The ammonia water containing coal powder impurities enters the left side of the baffle through the cylinder. The ammonia water and coal powder sediment is sent to the tar ammonia water separation section through vent port b. The ammonia water flows through the baffle to the right side of the baffle and is pumped to the nozzle for circulation spraying. At the same time, ammonia water is added at the ammonia water inlet to meet the requirements of circulation spraying. The bottom sediment is sent to the tar ammonia water separation section through vent port a.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1) The primary cooler for gas distribution is composed of a gas scrubber, a gas purifier, and a gas distribution system.

[0013] 2) The top of the primary cooler adopts a gas distribution system to evenly distribute the gas, ensuring that the gas enters the primary cooler evenly. At the same time, the top of the branch pipe is aligned and the top also has the function of removing impurities.

[0014] 3) This equipment is simple and compact, reducing the footprint. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the primary cooler structure described in this invention.

[0016] Figure 2 This is a schematic diagram of the AA-direction structure of the primary cooler described in this invention.

[0017] Figure 3 This is a schematic diagram of the BB direction structure of the primary cooler described in this invention.

[0018] Figure 4 This is a schematic diagram showing the connection of the primary cooler cover plate, branch pipe, folding plate, and arc plate described in this invention.

[0019] In the diagram: 1. Bottom of the primary cooler 2. Gas outlet 3. Low-temperature water section 4. Circulating water section 5. Top of the primary cooler 6. Spray liquid inlet 7. Gas connection pipe 8. Gas purifier 9. Gas scrubber 21. Flange cover 22. Flange a 23. Branch pipe 24. Riser 25. Bending plate 26. Arc plate 41. Flange b 42. Vertical straight pipe section 43. Elbow 44. Horizontal straight pipe section 45. Nozzle 46. Mounting hole 47. Ammonia water inlet 48. Ammonia water pump 51. Cover plate 52. Cylinder 53. Conical section 54. Bottom cylinder 55. Make-up ammonia water inlet 56. Ammonia water outlet 57. Baffle plate 58. End cap 59. Vent a 60. Vent b 61. Skirt Detailed Implementation

[0020] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings:

[0021] See Figure 1 This is a schematic diagram of the structure of the present invention. The present invention provides a primary cooler, comprising a primary cooler side plate, a primary cooler cover plate, a primary cooler bottom plate, a gas outlet 2, a low-temperature water section 3, a circulating water section 4, a spray liquid inlet 6, a gas connecting pipe 7, a gas purifier 8, and a gas scrubber 9. The primary cooler side plate, the primary cooler cover plate, and the primary cooler bottom plate constitute the primary cooler shell. The circulating water section 4 and the low-temperature water section 3 are sequentially arranged from the primary cooler top 5 to the primary cooler bottom 1. The gas outlet 2 is located at the primary cooler bottom 1, and the spray liquid inlet 6 is located at the primary cooler top 5. The gas connecting pipe 7, the gas purifier 8, and the gas scrubber 9 are located outside the primary cooler. The bottom of the gas connecting pipe 7 is inserted into the gas purifier 8, and the gas scrubber 9 is connected to the side wall of the section of the gas purifier 8 into which the gas connecting pipe 7 is inserted.

[0022] See Figure 1 and Figure 3 The gas connection pipe 7 includes a flange cover 21, a flange a22, a branch pipe 23, a riser 24, a baffle plate 25, and an arc plate 26. The bottom of the riser 24 is inserted into the gas purifier 8. The flange cover 21 is located on the top of the riser 24 through the flange a22. The branch pipe 23 is led out from the riser 24 in two branches and enters the side plate of the primary cooler, and is located between the baffle plate 25 and the cover plate of the primary cooler. The baffle plate 25 is a roof-shaped baffle plate 25 and is located under the cover plate of the primary cooler. The branch pipe 23 entering the primary cooler is located between the baffle plate 25 and the top cover of the primary cooler. The baffle plate 25 gradually decreases in size from the inlet end. Both ends of the baffle plate 25 are welded to the side plate of the primary cooler. Both ends of the arc plate 26 are welded to the baffle plate 25 and the cover plate of the primary cooler. The branch pipe 23, the baffle plate 25, and the arc plate 26 constitute a gas distribution system inside the primary cooler.

[0023] See Figure 1 , Figure 2 and Figure 3 The gas scrubber 9 includes a flange b41, a vertical straight pipe section 42, an elbow 43, a horizontal straight pipe section 44, a nozzle 45, a mounting hole 46, an ammonia inlet 47, and an ammonia pump 48. The flange b41 is located at the top of the vertical straight pipe section 42. The bottom of the vertical straight pipe section 42 is connected to the elbow 43. The elbow 43 is connected to the horizontal straight pipe section 44. The horizontal straight pipe section 44 is connected to the side wall of the section into which the gas purifier 8 is inserted by the gas connecting pipe 7. The horizontal straight pipe section 44 enters the cylinder 52 tangentially. The nozzle 45 is located inside the vertical straight pipe section 42, and the spray direction of the nozzle 45 is towards the top of the vertical straight pipe section 42. The nozzle 45 is a dynamic wave nozzle 45. The ammonia inlet 47 is connected to the nozzle 45 through the mounting hole 46. The ammonia inlet 47 is connected to the ammonia pump 48 through a pipe.

[0024] See Figure 1The gas purifier 8 includes a cover plate 51, a cylinder 52, a conical section 53, a bottom cylinder 54, a gas-liquid separator, an ammonia water inlet 55, an ammonia water outlet 56, a baffle plate 57, a head 58, a vent a59, a vent b60, and a skirt 61. The cover plate 51 covers the top of the cylinder 52. The conical section 53 is located inside the cylinder 52 and at the top of the bottom cylinder 54. The gas-liquid separator is located inside the conical section 53. The head 58 is located between the cylinder 52 and the bottom of the bottom cylinder 54. The bottom of the head 58 has vent a59 and vent b60. The baffle plate 57 is located above the head 58. The bottom of the cylinder 52 is lower than the top of the baffle plate 57. At the location of the cylinder 52, a supplementary ammonia water inlet 55 and an ammonia water outlet 56 are provided on the side wall. The ammonia water outlet 56 is connected to the ammonia water pump 48 through a pipe. A skirt seat 61 is provided at the bottom of the end cap 58. The ammonia water containing impurities such as coal powder enters the left side of the baffle 57 through the cylinder 52. The bottom sediment is sent to the tar ammonia water separation section through the vent b60. The bottom of the bottom cylinder 54 is lower than the top of the baffle 57, which serves as a liquid seal. The ammonia water flows to the right side of the baffle 57 and is sent to the ammonia water spray pipe for circulation by the ammonia water pump 48. The bottom sediment is sent to the tar ammonia water separation section through the vent a59. The ammonia water inlet 47 is supplementary ammonia water from the tank area to meet the requirements of the circulating spray volume.

[0025] In one method of using a primary cooler, coal gas enters a coal gas scrubber 9 and comes into counter-current contact with ammonia water from a dynamic wave nozzle 45 in a vertical straight pipe section 42. Ammonia water from the bottom of a coal gas purifier 8 is pumped into an ammonia water inlet 47 by an ammonia water pump 48. The ammonia water sprayed from the dynamic wave nozzle 45 comes into counter-current contact with the coal gas, causing high-speed counter-current collisions between the gas and liquid phases. When the momentum of the two phases reaches equilibrium, a highly turbulent foam zone is formed with a large contact surface area, and these contact surfaces are constantly and rapidly renewed, achieving a highly efficient scrubbing effect. Since the ammonia water contains large particulate impurities such as coal dust, a large-aperture nozzle 45 is used to ensure that the equipment does not clog during the ammonia water spraying process.

[0026] The gas enters the cylinder 52 tangentially along the horizontal straight pipe section 44. The airflow changes from linear motion to circular motion. Most of the rotating airflow spirals downwards along the inner wall of the cylinder 52, flowing towards the cone. During the rotation, centrifugal force is generated, throwing particles such as ammonia water and coal powder, which have a relative density greater than that of the gas, towards the inner wall of the cylinder 52. Once the ammonia water and coal powder particles come into contact with the inner wall of the cylinder 52, they lose radial inertial force and fall along the wall due to downward momentum and downward gravity, entering the ammonia water outlet 56. When the rotating downward gas reaches the cone section 53, it moves towards the center of the gas-liquid separator due to the conical contraction. According to the principle of constant rotational torque, its tangential velocity continuously increases, and the centrifugal force on the ammonia water and coal powder also continuously strengthens. When the gas reaches a certain position at the lower end of the cone, it... The same rotation direction reverses from bottom to top in the middle of the gas-liquid separator, continuing the spiral flow. It flows upward through the riser 24, and then enters the gas distribution system formed by the branch pipe 23, baffle 25, and arc plate 26 inside the primary cooler, and is sent to the primary cooler for gas cooling. After separation, the ammonia water and coal powder enter the lower space of the cylinder 52, where they settle by gravity. The bottom sediment is sent to the tar ammonia water separation section for further processing via the vent b60. The ammonia water flows to the right side through the baffle 57 and is sent to the power wave nozzle 45 for circulating spraying via the ammonia water pump 48. At the same time, the ammonia water inlet 47 provides supplementary ammonia water from the tank area to meet the requirements of the circulating spray volume. The bottom sediment is sent to the tar ammonia water separation section for further processing via the vent a59.

[0027] The above embodiments are implemented based on the technical solution of the present invention, providing detailed implementation methods and specific operation processes. However, the scope of protection of the present invention is not limited to the above embodiments. Unless otherwise specified, the methods used in the above embodiments are conventional methods.

Claims

1. A lube oil cooler comprising a lube oil cooler side plate, a lube oil cooler cover plate and a lube oil cooler bottom plate, the lube oil cooler side plate, the lube oil cooler cover plate and the lube oil cooler bottom plate constituting a lube oil cooler housing, characterized in that, It also includes a gas outlet, a low-temperature water section, a circulating water section, a spray liquid inlet, a gas connection pipe, a gas purifier, and a gas scrubber. The circulating water section and the low-temperature water section are arranged sequentially from the top to the bottom of the primary cooler. The gas outlet is located at the bottom of the primary cooler, and the spray liquid inlet is located at the top of the primary cooler. The gas connection pipe, the gas purifier, and the gas scrubber are located outside the primary cooler. The bottom of the gas connection pipe is inserted into the gas purifier, and the gas scrubber is connected to the side wall of the section into which the gas connection pipe is inserted. The gas connection pipeline includes a flange cover, flange a, a branch pipe, a riser, a folding plate, and an arc plate. The bottom of the riser is inserted into the gas purifier. The flange cover is located on the top of the riser through flange a. The branch pipes are divided into two branches that lead out from the riser and enter the primary cooler. The folding plate is a roof-shaped folding plate and is located under the cover of the primary cooler. The branch pipe entering the primary cooler is located between the folding plate and the top cover of the primary cooler. The two ends of the folding plate are welded to the side plates of the primary cooler. The two ends of the arc plate are welded to the folding plate and the cover of the primary cooler. The gas scrubber includes a flange b, a vertical straight pipe section, an elbow, a horizontal straight pipe section, a nozzle, a mounting hole, an ammonia inlet, and an ammonia pump. The flange b is located at the top of the vertical straight pipe section, the elbow is connected to the bottom of the vertical straight pipe section, the elbow is connected to the horizontal straight pipe section, the horizontal straight pipe section is connected to the side wall of the gas purifier inserted by the gas connection pipe, the nozzle is located inside the vertical straight pipe section, and the nozzle sprays towards the top of the vertical straight pipe section. The ammonia inlet is connected to the nozzle through the mounting hole, and the ammonia inlet is connected to the ammonia pump through a pipe. The gas purifier includes a cover plate, a cylinder, a conical section, a bottom cylinder, a gas-liquid separator, a supplementary ammonia inlet, an ammonia outlet, a baffle plate, a head, vent a, vent b, and a skirt. The cover plate covers the top of the cylinder. The conical section is located inside the cylinder and at the top of the bottom cylinder. The gas-liquid separator is located inside the conical section. The head is located between the cylinder and the bottom of the bottom cylinder. Vent a and vent b are located at the bottom of the head. A baffle plate is located at the top of the head. The bottom of the cylinder is lower than the top of the baffle plate. A supplementary ammonia inlet and an ammonia outlet are located on the side wall of the cylinder. The ammonia outlet is connected to an ammonia pump via a pipe. A skirt is located at the bottom of the head.

2. A moisture separator according to claim 1, wherein The nozzle is a dynamic wave nozzle.

3. A method of using a moisture separator according to any one of claims 1-2, characterized in that, Ammonia water from the bottom of the gas purifier is pumped into the ammonia water inlet. Gas enters the gas scrubber, where it comes into counter-current contact with the ammonia water at the nozzles in the vertical straight pipe section. The gas then enters the cylinder tangentially along the horizontal straight pipe section. The gas flow spirals downwards along the inner wall of the cylinder, flowing towards the cone, throwing particles such as ammonia water and coal dust, which have a relative density greater than gas, towards the inner wall of the cylinder before entering the ammonia water outlet. The gas then reaches the conical gas-liquid separator, where it reverses direction and flows upwards through the riser, then into the branch pipes, baffles, and arc plates. The gas distribution system inside the primary cooler sends the gas to the primary cooler for cooling. After separation, the ammonia water and coal powder enter the cylinder. The ammonia water containing coal powder impurities enters the left side of the baffle through the cylinder. The ammonia water and coal powder sediment is sent to the tar ammonia water separation section through vent port b. The ammonia water flows through the baffle to the right side of the baffle and is pumped to the nozzle for circulation spraying. At the same time, ammonia water is added at the ammonia water inlet to meet the requirements of the circulation spraying volume. The bottom sediment is sent to the tar ammonia water separation section through vent port a.

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