A linkage device for kiln waste heat and cooling system

Abstract

This utility model discloses a linkage device for a kiln waste heat and cooling system. The device connects the kiln's high-temperature gas outlet to the cooling system via a main pipeline and integrates an infrared temperature sensor, an electric three-way proportional regulating valve, a gas flow meter, and a pressure transmitter to achieve real-time monitoring and dynamic adjustment of waste heat parameters. The device features an innovative buffer tank structure, employing a double-layer tank body and a high-temperature resistant partition to separate the buffer chamber and pressure relief chamber. Pressure balance is optimized through a spring-loaded pressure relief valve and a return pipeline, and a solenoid valve and pneumatic booster pump enable cascaded utilization of waste heat. The controller allocates the flow of high-temperature gas, ensuring stable operation of the cooling system while maximizing the recovery of waste heat energy. This device significantly improves the energy efficiency of the kiln system and reduces cooling energy consumption. It is suitable for high-temperature industrial fields such as ceramics and metallurgy, and has advantages such as compact structure, high degree of automation, and significant energy-saving effect, making it of great value in promoting the resource utilization of industrial waste heat.

Description

Technical Field

[0001] This utility model belongs to the field of waste heat utilization and energy-saving technology of industrial kilns, and specifically relates to a succulent leaf cutting fixing bracket. Background Technology

[0002] In the photovoltaic glass manufacturing process, the kiln, as the core thermal equipment, generates high-temperature flue gas (typically ranging from 450℃ to 600℃) that carries a large amount of waste heat. Existing waste heat recovery technologies mainly use fixed cooling systems to exchange heat with the flue gas, converting the waste heat into steam or hot water for reuse in production processes.

[0003] The hot gas passage parameters (such as flow rate, heat exchange area, and residence time) of existing cooling systems are all designed based on fixed operating conditions and cannot be dynamically adjusted according to real-time fluctuations in the kiln hot gas outlet temperature. When the kiln hot gas temperature is high, the fixed flow rate results in insufficient residence time of the flue gas in the heat exchanger, leading to inadequate waste heat recovery; while when the hot gas temperature is low, the fixed passage limits the amount of flue gas that can be processed per unit time, causing redundancy or insufficiency in the system's processing capacity. Utility Model Content

[0004] In order to overcome the problems existing in the background technology, this utility model provides a linkage device for kiln waste heat and cooling system.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a kiln waste heat and cooling system linkage device, located between the kiln high-temperature gas outlet and the cooling system, comprising: The main pipeline connects the high-temperature gas outlet to the cooling system. Along the gas flow direction, an infrared temperature sensor, an electric three-way proportional regulating valve, a check valve, a first pressure transmitter, and a gas flow meter are sequentially installed on the main pipeline. The buffer tank is connected to the bypass interface of the electric three-way proportional regulating valve via a bypass pipe. The interior of the buffer tank is divided into a buffer chamber and a pressure relief chamber by a high-temperature resistant partition. The buffer chamber and the pressure relief chamber are connected through a first spring-type pressure relief valve. The bypass is connected to the buffer chamber. The buffer chamber is provided with a return pipeline and the main pipeline connected to the upstream of the first pressure transmitter. The connection point is a three-way pipe. The three-way pipe is located between the check valve and the first pressure transmitter. A solenoid valve is provided on the return pipeline. It also includes a controller, which is configured as follows: It receives the temperature signal from the infrared temperature sensor, the flow signal from the gas flow meter, and the pressure signal from the second pressure transmitter; The flow ratio of the electric three-way proportional control valve is dynamically adjusted based on temperature and flow signals.

[0006] Preferably, the bypass pipeline is equipped with a second pressure transmitter and a pneumatic booster pump.

[0007] Preferably, the pressure relief chamber is provided with a pressure relief pipeline, the pressure relief pipeline is provided with a second spring-loaded pressure relief valve, and the other end of the pressure relief pipeline is connected to the return pipeline.

[0008] Preferably, the buffer tank has a double-layer tank structure, comprising: The inner tank body is made of SiC ceramic refractory material. The outer tank body is made of 310S stainless steel; A heat insulation layer is disposed between the inner tank and the outer tank, and the heat insulation layer is a nano heat insulation felt.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention incorporates an infrared temperature sensor, a first pressure transmitter, and a gas flow meter in the main pipeline. These sensors detect the temperature, pressure, and flow rate of the high-temperature gas from the kiln. The controller generates control logic based on this data, controlling the flow rate via an electrically operated three-way proportional control valve and a buffer tank. When a flow rate reduction is needed, the valve opens the bypass, and a booster pump compresses the gas into the buffer tank; when a flow rate increase is needed, the bypass closes, and the gas from the buffer tank is released to the return pipeline. Furthermore, real-time dynamic distribution can be achieved through the proportional control valve, thereby achieving the following effects: 1. Energy saving: By dynamically adjusting the flow rate, energy waste can be avoided. For example, the processing volume can be reduced at high temperatures and increased at low temperatures to improve energy utilization.

[0010] 2. Extend the life of the cooling system: Reduce the impact of temperature fluctuations on the equipment. The presence of buffer tank 7 may smooth flow changes and reduce mechanical stress.

[0011] 3. Optimize waste heat recovery efficiency: Precisely control flow rate and temperature to ensure full recovery of waste heat and improve overall efficiency.

[0012] 4. Real-time dynamic adjustment: The combination of electric three-way proportional regulating valve and buffer tank allows for more flexible control to adapt to different working conditions.

[0013] 5. System stability: Through sensors and feedback control, the system can automatically adjust, reducing manual intervention and improving stability. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the linkage device between the waste heat and cooling system of the kiln.

[0015] In the diagram: 1. Main pipe; 2. Infrared temperature sensor; 3. Electric three-way proportional regulating valve; 4. Check valve; 5. First pressure transmitter; 6. Gas flow meter; 7. Buffer tank; 8. Bypass pipe; 9. High-temperature resistant partition; 10. Buffer chamber; 11. Three-way pipe; 12. Return pipe; 13. Solenoid valve; 14. Second pressure transmitter; 15. Pneumatic booster pump; 16. Pressure relief chamber; 17. First spring-loaded pressure relief valve; 18. Pressure relief pipe; 19. Second spring-loaded pressure relief valve. Detailed Implementation

[0016] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the preferred embodiments of this utility model will be described in detail below to facilitate understanding by those skilled in the art.

[0017] Please see Figure 1 This embodiment provides a kiln waste heat and cooling system linkage device, located between the kiln high-temperature gas outlet and the cooling system, including: Main pipeline 1 connects the high-temperature gas outlet to the cooling system, and the following are arranged sequentially along the gas flow direction on main pipeline 1: Infrared temperature sensor 2 is embedded in the inner wall of the pipe, with the probe extending into the central flow channel; Electric three-way proportional regulating valve 3, main outlet connected to downstream, bypass outlet connected to buffer tank 7; One-way valve 4 prevents gas backflow; The first pressure transmitter 5 detects the air pressure in the main pipeline 1; Gas flow meter 6 detects the flow rate of the main pipeline 1 into the cooling system; The buffer tank 7 is connected to the bypass interface of the electric three-way proportional regulating valve 3 via a bypass pipe 8. The interior of the buffer tank 7 is divided into a buffer chamber 10 and a pressure relief chamber 16 by a high-temperature resistant partition 9. The buffer chamber 10 and the pressure relief chamber 16 are connected by a first spring-type pressure relief valve 17. The bypass is connected to the buffer chamber 10. The pressure relief chamber 16 prevents the buffer chamber 10 from becoming too pressurized and causing danger. The buffer chamber 10 is provided with a return pipe 12 and the main pipe 1 connected to the upstream of the first pressure transmitter 5. The connection point is a three-way pipe 11. The three-way pipe 11 is located between the one-way valve 4 and the first pressure transmitter 5. A solenoid valve 13 is provided on the return pipe 12. The solenoid valve 13 is normally closed and is opened by command. It also includes a controller, which is configured as follows: The system receives the temperature signal from the infrared temperature sensor 2, the flow signal from the gas flow meter 6, and the pressure signal from the second pressure transmitter 14; and dynamically adjusts the flow ratio of the electric three-way proportional control valve 3 based on the temperature and flow signals.

[0018] The bypass pipeline 8 is equipped with a second pressure transmitter 14 and a pneumatic booster pump 15. The data from the second pressure transmitter 14 and the first pressure transmitter 5 are used to adjust the electric three-way proportional control valve 3.

[0019] The pressure relief chamber 16 is equipped with a pressure relief pipe 18, and the pressure relief pipe 18 is equipped with a second spring-loaded pressure relief valve 19. The other end of the pressure relief pipe 18 is connected to the return pipe 12. When the gas pressure in the pressure relief chamber 16 is too high, the second spring-loaded pressure relief valve 19 is triggered, causing the released gas to enter the return pipe 12 and flow back to the main pipe 1. The connection point is located downstream of the solenoid valve 13.

[0020] The buffer tank 7 has a double-layer tank structure, including: The inner tank is made of SiC ceramic refractory material, with a temperature resistance of >1600℃; The outer tank body is made of 310S stainless steel; A heat insulation layer is disposed between the inner tank and the outer tank. The heat insulation layer is a nano heat insulation felt with a thickness of 50 mm and a thermal conductivity of ≤0.02 W / m·K.

[0021] The controller is configured as follows: Core control layer: The main controllers are Delta DT3 series and Hongrun NHR-5400, which are responsible for temperature-flow closed-loop regulation and buffer tank 7 pressure program control, respectively.

[0022] Security Execution Layer: The pressure relief valve linkage uses a Kisawa MPK1706 pulse controller + SM-10 actuator to achieve dual redundancy protection of mechanical and electrical components.

[0023] Data Acquisition Layer: Distributed pressure / flow signals are wirelessly aggregated via the Datatech DTD120FHC, avoiding the risks associated with high-temperature pipeline wiring.

[0024] The workflow of this utility model is as follows. The data is for reference only and is used to illustrate this utility model: Scenario 1: High-temperature gas needs to be cooled down. Infrared sensor detects excessive temperature → controller calculates need to reduce flow rate → adjust electric three-way valve: The main road opening is reduced to 30%, and the bypass opening is increased to 70% → some high-temperature gas enters the buffer chamber 10 through the bypass.

[0025] The pressure in buffer chamber 10 increases → the second pressure transmitter 14 monitors the pressure and finds it reaches 0.3 MPa → the controller starts: Pneumatic booster pump 15 injects compressed air into buffer chamber 10 → chamber pressure rises to 0.5MPa (compressing gas volume, increasing storage capacity). At the same time, the solenoid valve 13 is opened, and some gas returns to the main pipeline 1 through the return pipeline 12, maintaining the system pressure balance.

[0026] Scenario 2: Overpressure protection of buffer tank 7 If the pressure in buffer chamber 10 is greater than 0.4 MPa, the first spring-loaded pressure relief valve 17 opens, and gas overflows into the pressure relief chamber 16. If the pressure in the pressure relief chamber 16 is greater than 0.6 MPa, the second spring-loaded pressure relief valve 19 opens, and the gas flows through the pressure relief pipeline 18, the return pipeline 12, and back to the main pipeline 1.

[0027] Scenario 3: Cryogenic gas accelerates through Infrared sensor detects low temperature → controller commands electric three-way valve: The main path opening is increased to 100%, and the bypass opening is reduced to 0% → all gas enters the cooling system; Close solenoid valve 13 → cut off backflow.

[0028] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. A kiln waste heat and cooling system linkage device, located between the kiln high-temperature gas outlet and the cooling system, characterized in that, include: Main pipeline (1) connects the high-temperature gas outlet to the cooling system. An infrared temperature sensor (2), an electric three-way proportional regulating valve (3), a check valve (4), a first pressure transmitter (5), and a gas flow meter (6) are sequentially installed along the gas flow direction on the main pipeline (1). Buffer tank (7) is connected to the bypass interface of the electric three-way proportional regulating valve (3) through a bypass pipeline (8). The interior of the buffer tank (7) is divided into a buffer chamber (10) and a pressure relief chamber (16) by a high-temperature resistant partition (9). The buffer chamber (10) and the pressure relief chamber (16) are connected through a first spring-type pressure relief valve (17). The bypass is connected to the buffer chamber (10). The buffer chamber (10) is provided with a return pipe (12) and the main pipe (1) connected upstream of the first pressure transmitter (5), with the connection point being a three-way pipe (11). The three-way pipe (11) is located between the one-way valve (4) and the first pressure transmitter (5). The return pipe (12) is provided with a solenoid valve (13). The system also includes a controller configured to: receive the temperature signal from the infrared temperature sensor (2), the flow signal from the gas flow meter (6), and the pressure signal from the second pressure transmitter (14); and dynamically adjust the flow ratio of the electric three-way proportional regulating valve (3) based on the temperature signal and the flow signal.

2. The kiln waste heat and cooling system linkage device according to claim 1, characterized in that, The bypass pipeline (8) is equipped with a second pressure transmitter (14) and a pneumatic booster pump (15), and the return pipeline (12) is equipped with a solenoid valve (13).

3. The kiln waste heat and cooling system linkage device according to claim 2, characterized in that, The pressure relief chamber (16) is provided with a pressure relief pipeline (18), the pressure relief pipeline (18) is provided with a second spring-type pressure relief valve (19), and the other end of the pressure relief pipeline (18) is connected to the return pipeline (12).

4. The kiln waste heat and cooling system linkage device according to claim 3, characterized in that, The buffer tank (7) has a double-layer tank structure, including: an inner tank made of SiC ceramic refractory material, an outer tank made of 310S stainless steel; and a heat insulation layer disposed between the inner tank and the outer tank, wherein the heat insulation layer is a nano heat insulation felt.

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