Self-cooling device for high-temperature coal gas of blast furnace

Abstract

The utility model discloses a blast furnace high-temperature coal gas self-cooling device, which belongs to the technical field of waste heat recovery and comprises a cooling tower, a waste heat refrigerating unit, a coal gas main pipe and a control cabinet, the outer end of the coal gas main pipe is connected with a cooler, and the waste heat refrigerating unit comprises a generator, an evaporator and a condenser. A high-temperature gas pipe is connected between a generator gas side inlet and a gas header pipe, a low-temperature gas pipe is connected between a generator gas side outlet and the gas header pipe, a cooling tower water inlet pipe and a cooling tower water outlet pipe are connected between the water side of the condenser and the cooling tower, and a low-temperature water pipe and a medium-temperature water pipe are connected between the water side of the evaporator and the cooler. A reducing three-way valve is installed on the gas header pipe, the gas header pipe is connected with a high-temperature gas pipe through the reducing three-way valve, a gas fan and a balance adjusting valve are installed on the high-temperature gas pipe, the balance adjusting valve is located on the right side of the gas fan, waste heat of high-temperature gas can be recycled through a waste heat refrigerating unit, and therefore the effects of energy conservation and emission reduction are achieved.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery technology, and more specifically, to a self-cooling device for high-temperature coal gas in a blast furnace. Background Technology

[0002] In modern industrial production, blast furnace ironmaking plays a crucial role as the core link in steel manufacturing. During operation, blast furnaces generate a large amount of high-temperature gas, which contains abundant thermal energy. Traditional blast furnace gas treatment methods often focus on simple dust removal, purification, and direct discharge or inefficient use of some thermal energy, without fully exploring the potential value of the waste heat of high-temperature gas, resulting in a huge waste of energy.

[0003] With the continuous growth of energy demand and the increasing awareness of environmental protection, energy conservation and emission reduction have become key issues that urgently need to be addressed in the industrial sector. On the one hand, traditional energy resources such as coal and oil are facing increasing depletion, and the tight energy supply situation compels enterprises to improve energy efficiency in order to reduce production costs and ensure energy security. On the other hand, the large amount of greenhouse gas emissions generated during industrial production have had an impact on climate change, restricting pollutant emissions and energy consumption of industrial enterprises.

[0004] In the blast furnace ironmaking industry, the recovery and utilization of waste heat from high-temperature coal gas has enormous potential for energy conservation and emission reduction. However, existing waste heat recovery technologies have many limitations. For example, some waste heat recovery devices have complex structures, high equipment investment costs, and are difficult to operate and maintain, making it difficult for enterprises to bear their economic burden, thus hindering the promotion and application of these technologies. In addition, some waste heat recovery systems are inefficient and cannot fully recover the waste heat in high-temperature coal gas, making it difficult to meet the energy-saving needs in actual production. Furthermore, some waste heat recovery methods have poor treatment effects on coal gas, which may affect the subsequent utilization of coal gas or even damage production equipment.

[0005] Therefore, this application provides a blast furnace high-temperature gas self-cooling device to solve the problems mentioned in the background art. Summary of the Invention

[0006] In view of the problems existing in the prior art, the purpose of this utility model is to provide a blast furnace high-temperature gas self-cooling device, which can realize the recovery of waste heat of high-temperature gas by using waste heat refrigeration unit, thereby achieving the effect of energy saving and emission reduction.

[0007] To solve the above problems, the present invention adopts the following technical solution:

[0008] A self-cooling device for high-temperature blast furnace gas includes a cooling tower, a waste heat refrigeration unit, a main gas pipe, and a control cabinet. A cooler is connected to the outer end of the main gas pipe. The waste heat refrigeration unit includes a generator, an evaporator, and a condenser. A high-temperature gas pipe is connected between the gas inlet of the generator and the main gas pipe, and a low-temperature gas pipe is connected between the gas outlet of the generator and the main gas pipe. A cooling tower inlet pipe and a cooling tower outlet pipe are connected between the water side of the condenser and the cooling tower. A low-temperature water pipe and a medium-temperature water pipe are connected between the water side of the evaporator and the cooler. A reducing three-way valve is installed on the main gas pipe, connecting it to the high-temperature gas pipe. A gas blower and a balancing valve are installed on the high-temperature gas pipe, with the balancing valve located to the right of the gas blower. This device utilizes the waste heat refrigeration unit to recover waste heat from the high-temperature gas, thereby achieving energy conservation and emission reduction.

[0009] As a further improvement of this utility model, temperature sensors are installed on the cooling tower inlet pipe, cooling tower outlet pipe, high-temperature gas pipe, low-temperature water pipe, medium-temperature water pipe, main gas pipe, and low-temperature gas pipe.

[0010] As a further improvement of this utility model, pressure sensors are installed on the high-temperature gas pipe, the main gas pipe, and the low-temperature gas pipe.

[0011] As a further improvement of this utility model, flow sensors are installed on the cooling tower inlet pipe, cooling tower outlet pipe, high-temperature gas pipe, medium-temperature water pipe, main gas pipe and low-temperature gas pipe.

[0012] As a further embodiment of this utility model: a cooling water pump is installed on the outlet pipe of the cooling tower, a reducing joint is provided at the connection between the low-temperature gas pipe and the high-temperature gas pipe, and a cooling water pump is installed on the medium-temperature water pipe.

[0013] Compared with existing technologies, the advantages of this utility model are:

[0014] 1. This device utilizes a waste heat refrigeration unit to recover the waste heat of high-temperature coal gas, converting the originally wasted heat energy into usable cold energy. The high-temperature coal gas is introduced into the coal gas side of the generator of the waste heat refrigeration unit through a gas fan and a variable diameter three-way valve for heat exchange, so that the waste heat is fully recovered.

[0015] 2. The device is equipped with temperature sensors, pressure sensors, and flow sensors on various key pipelines. These sensors can monitor parameters such as temperature, pressure, and flow rate of media such as high-temperature gas and cooling water in real time. The data collected by these sensors is transmitted to the control cabinet. The control cabinet precisely adjusts the operating status of the device according to the preset program to ensure that the temperature of the gas remains stable within a suitable range during the cooling process. Precise temperature control not only helps to improve the stability of subsequent processes and product quality, but also avoids damage to production equipment caused by excessive temperature fluctuations, extends the service life of the equipment, and reduces the company's equipment maintenance costs.

[0016] 3. The structural design of this device fully considers operational stability and economy. By rationally arranging components such as cooling towers, waste heat refrigeration units, and gas mains, and equipping them with auxiliary equipment such as cooling water pumps and cooling water pumps, the system achieves efficient operation. At the same time, the device adopts advanced waste heat refrigeration technology, which reduces water and electricity consumption compared to traditional cooling methods, thereby lowering operating costs. In addition, the device is relatively simple to operate and maintain, reducing labor costs and equipment downtime, further improving the economic benefits of the enterprise. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Explanation of the labels in the diagram:

[0019] 1. Reducing three-way valve; 2. Gas blower; 3. Balancing regulating valve; 4. Temperature sensor; 5. Pressure sensor; 6. Flow sensor; 7. Cooling water pump; 8. Cooling tower inlet pipe; 9. Cooling tower; 10. Cooling tower outlet pipe; 11. High-temperature gas pipe; 12. Reducing joint; 13. Generator; 14. Evaporator; 15. Waste heat refrigeration unit; 16. Low-temperature water pipe; 17. Medium-temperature water pipe; 18. Cooling water pump; 19. Cooler; 20. Gas main pipe; 21. Low-temperature gas pipe; 22. Control cabinet; 23. Exhaust fan; 24. Condenser. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example

[0023] Please see Figure 1 A self-cooling device for high-temperature blast furnace gas includes a cooling tower 9, a waste heat refrigeration unit 15, a gas main 20, and a control cabinet 22. A cooler 19 is connected to the outer end of the gas main 20. The waste heat refrigeration unit 15 includes a generator 13, an evaporator 14, and a condenser 24. A high-temperature gas pipe 11 is connected between the gas-side inlet of the generator 13 and the gas main 20, and a low-temperature gas pipe 21 is connected between the gas-side outlet of the generator 13 and the gas main 20. The water side of the condenser 24 is connected to the cooling tower 9. The cooling tower has an inlet pipe 8 and an outlet pipe 10. The water side of the evaporator 14 is connected to the cooler 19 by a low-temperature water pipe 16 and a medium-temperature water pipe 17. A reducing three-way valve 1 is installed on the main gas pipe 20. The main gas pipe 20 is connected to the high-temperature gas pipe 11 through the reducing three-way valve 1. A gas blower 2 and a balancing regulating valve 3 are installed on the high-temperature gas pipe 11. The balancing regulating valve 3 is located to the right of the gas blower 2. It can realize the recovery of waste heat from the high-temperature gas by the waste heat refrigeration unit, thereby achieving the effect of energy saving and emission reduction.

[0024] Temperature sensors 4 are installed on the cooling tower inlet pipe 8, cooling tower outlet pipe 10, high-temperature gas pipe 11, low-temperature water pipe 16, medium-temperature water pipe 17, main gas pipe 20, and low-temperature gas pipe 21. Pressure sensors 5 are installed on the high-temperature gas pipe 11, main gas pipe 20, and low-temperature gas pipe 21. Flow sensors 6 are installed on the cooling tower inlet pipe 8, cooling tower outlet pipe 10, high-temperature gas pipe 11, medium-temperature water pipe 17, main gas pipe 20, and low-temperature gas pipe 21. A cooling water pump 7 is installed on the cooling tower outlet pipe 10. A reducing joint 12 is provided at the pipe opening connection of low-temperature gas pipe 21 and high-temperature gas pipe 11. A cooling water pump 18 is installed on the medium-temperature water pipe 17.

[0025] Working principle: High-temperature coal gas is introduced into the gas side of the generator 13 of the waste heat refrigeration unit 15 for heat exchange using a gas blower 2 and a reducing three-way valve 1. The heat-exchanged coal gas returns to the main gas pipe 20 through the low-temperature gas pipe 21. The waste heat refrigeration unit 15 dissipates heat through the cooling tower 9 on the water side of its condenser 24. In addition, one side of the evaporator 14 on the waste heat refrigeration unit 15 absorbs heat from the medium-temperature water and transports the cooled water to the cooler 19 on the main gas pipe 20 for further cooling of the high-temperature coal gas. Compared with the prior art, this utility model can realize the recovery of waste heat from high-temperature coal gas by using the waste heat refrigeration unit, thereby achieving the effect of energy saving and emission reduction.

[0026] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A blast furnace high-temperature gas self-cooling device, comprising a cooling tower (9), a waste heat refrigeration unit (15), a gas main (20), and a control cabinet (22), characterized in that, A cooler (19) is connected to the outer end of the main gas pipe (20). The waste heat refrigeration unit (15) includes a generator (13), an evaporator (14), and a condenser (24). A high-temperature gas pipe (11) is connected between the gas-side inlet of the generator (13) and the main gas pipe (20). A low-temperature gas pipe (21) is connected between the gas-side outlet of the generator (13) and the main gas pipe (20). A cooling tower inlet pipe is connected between the water side of the condenser (24) and the cooling tower (9). 8) and cooling tower outlet pipe (10), the water side of the evaporator (14) and the cooler (19) are connected by a low temperature water pipe (16) and a medium temperature water pipe (17), a reducing three-way valve (1) is installed on the main gas pipe (20), the main gas pipe (20) is connected to the high temperature gas pipe (11) through the reducing three-way valve (1), the high temperature gas pipe (11) is equipped with a gas blower (2) and a balance regulating valve (3), the balance regulating valve (3) is located on the right side of the gas blower (2).

2. The blast furnace high-temperature gas self-cooling device according to claim 1, characterized in that, Temperature sensors (4) are installed on the cooling tower inlet pipe (8), cooling tower outlet pipe (10), high temperature gas pipe (11), low temperature water pipe (16), medium temperature water pipe (17), gas main pipe (20) and low temperature gas pipe (21).

3. The blast furnace high-temperature gas self-cooling device according to claim 1, characterized in that, Pressure sensors (5) are installed on the high-temperature gas pipe (11), the main gas pipe (20), and the low-temperature gas pipe (21).

4. The blast furnace high-temperature gas self-cooling device according to claim 1, characterized in that, Flow sensors (6) are installed on the cooling tower inlet pipe (8), cooling tower outlet pipe (10), high temperature gas pipe (11), medium temperature water pipe (17), gas main pipe (20) and low temperature gas pipe (21).

5. The blast furnace high-temperature gas self-cooling device according to claim 1, characterized in that, A cooling water pump (7) is installed on the outlet pipe (10) of the cooling tower. A reducing joint (12) is provided at the connection of the low temperature gas pipe (21) and the high temperature gas pipe (11). A cooling water pump (18) is installed on the medium temperature water pipe (17).

Images