Coal gas primary cooler efficient heat recovery device based on coking production
By adopting a J-type heat exchanger and rotating tube structure in coking production, the heat exchange time of cold water in the tube is extended, solving the problem of insufficient heat exchange caused by the high flow rate of cold water in the existing technology, and achieving a highly efficient heat recovery effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-09
- Publication Date
- 2026-04-03
AI Technical Summary
The simple tube structure of the gas primary cooler in existing coking production leads to a fast flow rate and short residence time of the cold water inside the tube, resulting in insufficient heat exchange time, which causes energy waste and environmental pollution.
The system adopts a horizontally placed J-type heat exchange tube structure. Cold water enters from the straight section and undergoes heat exchange through the bent section. Combined with the water injection of the rotating tube body, it ensures that the cold water is in full contact with the J-type heat exchange tube, prolonging the heat exchange time. Stable connection is achieved through sealed bearings and belt drive.
It improves the heat exchange effect, enhances the heat exchange efficiency between cold water and high-temperature gas, avoids the quality degradation caused by direct injection of cold water into the heat exchange tube, and achieves efficient heat energy recovery.
Smart Images
Figure CN224080802U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of coking production technology, specifically to a high-efficiency heat recovery device for a primary gas cooler based on coking production. Background Technology
[0002] In the coking process, the raw coal gas produced from the coke oven reaches temperatures as high as 650-750℃, containing a large amount of thermal energy. To meet the process requirements of subsequent gas purification, transportation, and chemical utilization, the raw coal gas needs to be rapidly cooled to a suitable temperature, typically 20-35℃, via a primary cooler. During this process, a large amount of sensible and latent heat carried by the gas is released. If this heat is not recovered and utilized, it will not only result in a huge waste of energy but may also cause thermal pollution to the environment.
[0003] In the primary gas cooler, circulating water exchanges heat with high-temperature gas, absorbing heat from the gas to cool it down while heating the circulating water. The heated circulating water is then transported to other heat-using equipment.
[0004] Existing primary coolers have relatively simple tube structures and fast water flow rates inside the tubes, resulting in short residence times for cold water and insufficient heat exchange time for high-temperature gas. Utility Model Content
[0005] This invention addresses the technical problem of insufficient heat exchange time for high-temperature coal gas caused by the relatively simple tube structure and high flow velocity of water in existing primary coolers. It provides a high-efficiency heat recovery device for coal gas primary coolers based on coking production.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency heat recovery device for a primary cooler of coal gas produced in coking plants, comprising: a heat exchange cylinder, which is a horizontally placed J-shaped structure, with a straight section at the bottom and a bent section at the top. Both ends of the heat exchange cylinder are fitted with gas cylinders connected to a gas pipe. An orifice plate is connected inside the gas cylinder and fastened to the end face of the heat exchange cylinder. Multiple J-shaped heat exchange tubes are installed inside the heat exchange cylinder, with both ends of the J-shaped heat exchange tubes connected to holes in the orifice plate. A water inlet pipe is connected to the first end of the straight section of the heat exchange cylinder, and a drain pipe is connected to the upper part of the bent section.
[0007] Preferably, the water inlet pipe includes a pipe body, multiple J-shaped heat exchange tubes are arranged circumferentially inside the heat exchange cylinder, the pipe body is connected to the center of the gas cylinder and the orifice plate, the outer end of the pipe body is connected to the liquid pump, the inner end of the pipe body is sealed, and liquid holes are evenly distributed around the circumference of the pipe body.
[0008] Preferably, the pipe body is rotatably connected to the center of the gas cylinder and the orifice plate via a sealed bearing, and the pipe body is connected to the power source via a belt drive.
[0009] Preferably, the heat exchange cylinder is composed of two half-cylinders, each half-cylinder edge is connected to a fastening plate, each half-cylinder joint is provided with a rubber gasket, and the fastening plates of the two half-cylinders are connected by bolts.
[0010] Compared with the prior art, the beneficial effects of this utility model are:
[0011] 1. Cold water is injected at the beginning of the straight section of the J-type heat exchanger and flows to the upper part of the bend section. During the flow, due to the long path and the resistance of the internal water flow, the flow velocity gradually slows down. It exchanges heat with the gas in the J-type heat exchanger tube. The high-temperature liquid after heat exchange flows upward and is discharged through the drain pipe at the upper part of the bend section of the heat exchanger tube, while the cold water continues to exchange heat in the straight section. The heat exchange time with the high-temperature gas is sufficient, which improves the heat exchange effect.
[0012] 2. Water is injected through the rotating tube at the center, so that the J-shaped heat exchange tubes at different positions in the straight section are all in contact with the newly injected cold water. This improves the heat exchange efficiency and avoids cold water directly hitting one part of the heat exchange tube, which would cause the heat exchange tube quality to deteriorate. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of this utility model;
[0014] Figure 2 This is a schematic cross-sectional view of the structure of this utility model.
[0015] In the diagram: 1. Heat exchanger cylinder; 2. Gas cylinder; 3. Gas pipe; 4. Orifice plate; 5. J-type heat exchanger tube; 6. Water inlet pipe; 61. Pipe body; 62. Belt drive; 7. Drain pipe; 8. Fastening plate. Detailed Implementation
[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0017] The rotary connection described in this device refers to the axial fixation of the bearing by mounting the bearing on the shaft, with a spring retaining ring groove provided on the shaft or shaft hole, and the rotation achieved by locking the elastic retaining ring in the retaining ring groove; the hinge connection refers to the connection method that allows movement through connecting parts such as hinges, pins, and short shafts.
[0018] The present invention will now be described in detail with reference to the accompanying drawings.
[0019] The following is in conjunction with the appendix Figure 1-2This embodiment describes a high-efficiency heat recovery device for a primary cooler of coal gas produced in coking plants. The device includes: a heat exchange cylinder 1, which has a horizontally placed J-shaped structure. The straight section of the heat exchange cylinder 1 is located at the bottom, and the bent section is located at the top. Coal gas cylinders 2 are sleeved at both ends of the heat exchange cylinder 1, and the coal gas cylinders 2 are connected to a coal gas pipe 3. An orifice plate 4 is connected inside the coal gas cylinder 2 and is fastened to the end face of the heat exchange cylinder 1. Multiple J-shaped heat exchange tubes 5 are installed inside the heat exchange cylinder 1, with both ends of the J-shaped heat exchange tubes connected to holes in the orifice plate 4. A water inlet pipe 6 is connected to the first end of the straight section of the heat exchange cylinder 1, and a drain pipe 7 is connected to the upper part of the bent section of the heat exchange cylinder 1.
[0020] Cold water is injected into the inlet pipe 6 at the beginning of the straight section of the J-type heat exchanger 1 and flows towards the upper part of the bend section of the heat exchanger 1. During the flow, due to the long path and the resistance of the internal water flow, the flow velocity gradually slows down. Coal gas is injected into the J-type heat exchanger 5 through the gas pipe 3 and gas cylinder 2 in the straight section of the heat exchanger 1, and discharged through the gas cylinder 2 and gas pipe 3 at the other end. During the flow, it exchanges heat with the low-velocity cold water. The high-temperature liquid after heat exchange flows upward and is discharged through the inlet pipe 6 at the upper part of the bend section of the heat exchanger 1, while the cold water continues to exchange heat in the straight section. The heat exchange time with the high-temperature coal gas is sufficient, which improves the heat exchange effect.
[0021] The water inlet pipe 6 includes a pipe body 61, multiple J-shaped heat exchange tubes 5 are arranged circumferentially inside the heat exchange cylinder 1, the pipe body 61 is connected to the center of the gas cylinder 2 and the orifice plate 4, the outer end of the pipe body 61 is connected to the liquid pump, the inner end of the pipe body 61 is closed, and liquid holes are evenly distributed around the circumference of the pipe body 61.
[0022] Water is injected into the tube 61 at the center, so that the J-shaped heat exchange tubes at different positions in the straight section are all in contact with the newly injected cold water. The temperature difference between the gas and the cold water is large, which improves the heat exchange efficiency. As the cold water flows in the tube 61, the flow velocity gradually decreases. Since the tube 61 does not extend to the bend of the heat exchange cylinder 1, the cold water discharged from the end of the tube 61 will not rise along the bend due to kinetic energy.
[0023] The pipe body 61 is rotatably connected to the center of the gas cylinder 2 and the orifice plate 4 via a sealed bearing, and the pipe body 61 is connected to the power source via a belt drive 62.
[0024] Rotating the tube body 61 prevents cold water from directly hitting one spot of the J-type heat exchange tube 5, which would cause a decrease in the quality of the J-type heat exchange tube 5.
[0025] The heat exchange cylinder 1 is composed of two half cylinders, each half cylinder is connected to a fastening plate 8 on its edge, and a rubber gasket is provided at the joint of each half cylinder. The fastening plates 8 of the two half cylinders are connected by bolts.
[0026] The J-type heat exchange tube 5 is easy to disassemble when it is blocked or cleaned.
[0027] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0028] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.
[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A high-efficiency heat recovery device for a primary cooler of coal gas produced from coking, characterized in that: include: The heat exchange cylinder (1) is a horizontally placed J-shaped structure. The straight section of the heat exchange cylinder (1) is located at the bottom, and the bent section of the heat exchange cylinder (1) is located at the top. Gas cylinders (2) are sleeved at both ends of the heat exchange cylinder (1). Gas cylinders (2) are connected to gas pipes (3). A perforated plate (4) is connected inside the gas cylinder (2). The perforated plate (4) is fastened to the end face of the heat exchange cylinder (1). Multiple J-shaped heat exchange tubes (5) are provided inside the heat exchange cylinder (1). The two ends of the J-shaped heat exchange tubes (5) are connected to the holes of the perforated plate (4) and connected to the perforated plate (4). A water inlet pipe (6) is connected to the first end of the straight section of the heat exchange cylinder (1), and a drain pipe (7) is connected to the upper part of the bent section of the heat exchange cylinder (1).
2. The high-efficiency heat recovery device for a primary cooler of coal gas produced in coking plants according to claim 1, characterized in that: The water inlet pipe (6) includes a pipe body (61), multiple J-shaped heat exchange tubes (5) are arranged circumferentially inside the heat exchange cylinder (1), the pipe body (61) is connected to the center of the gas cylinder (2) and the orifice plate (4), the outer end of the pipe body (61) is connected to the liquid pump, the inner end of the pipe body (61) is closed, and liquid holes are evenly distributed on the circumference of the pipe body (61).
3. The high-efficiency heat recovery device for a primary cooler of coal gas produced in coking plants according to claim 2, characterized in that: The pipe body (61) is rotatably connected to the center of the gas cylinder (2) and the orifice plate (4) via a sealed bearing, and the pipe body (61) is connected to the power source via a belt drive (62).
4. The high-efficiency heat recovery device for a primary cooler of coal gas produced in coking plants according to claim 1, characterized in that: The heat exchange cylinder (1) is composed of two half cylinders, each half cylinder edge is connected to a fastening plate (8), each half cylinder joint is provided with a rubber gasket, and the fastening plates (8) of the two half cylinders are connected by bolts.