Heating furnace cooling pipeline without heat exchanger

Abstract

A heating furnace cooling pipeline without a heat exchanger comprises a furnace body cooling water channel of a heating furnace, a water inlet pipeline connected with the water inlet end of the furnace body cooling water channel, and a water outlet pipeline connected with the water outlet end of the furnace body cooling water channel, and is characterized in that a flow control valve of which the opening degree is controlled by a control system to realize a three-way function is arranged on the water outlet pipeline; a water storage tank is arranged on the water inlet pipeline; and one end of the flow control valve is communicated with the water storage tank. The water outlet pipeline and the water inlet pipeline are close to the furnace body cooling water channel, the power of the external circulating water pump needed for maintaining the same process and pressure is small, external circulating water is properly introduced for cooling only in the high-temperature stage, energy conservation and consumption reduction are achieved, external circulating energy consumption is reduced, a heat exchanger is not used, circulating water pressure and flow loss are reduced, and energy conservation and emission reduction are achieved. Loss of heat exchange efficiency is avoided, and maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to a cooling pipeline for a heating furnace without a heat exchanger, belonging to the field of water cooling technology for heating furnaces. Background Technology

[0002] To protect the outer shell and electrodes of heat treatment furnaces from damage due to excessively high temperatures during high-temperature stages, outdoor cooling towers with circulating water are often used for cooling. However, water circulation continues uninterrupted during low-temperature or furnace shutdown phases, resulting in significant energy waste. CN 202221595178.1 discloses a water-cooling energy-saving system for multiple furnace groups, where the flow paths of the external and internal circulating cooling pipes are independent, avoiding the external circulating cooling pipes operating at the same power throughout the entire process. This allows for timely adjustment of energy consumption based on the cooling needs of the multiple furnace groups, effectively saving energy. However, existing furnace water cooling systems still have the following problems:

[0003] 1. Outdoor cooling towers are often used for circulating water cooling and temperature reduction. However, the cooling towers are often some distance away from the indoor equipment in the workshop, which increases the pressure loss of the circulating water.

[0004] 2. Using heat exchangers can lead to the accumulation of slag and foreign matter, with surface deposits causing pressure and flow losses in the circulating water, as well as heat exchange efficiency losses, resulting in higher operating and maintenance costs. Utility Model Content

[0005] The cooling pipeline of the heating furnace without heat exchanger provided by this utility model has a short distance between the outlet and inlet water pipelines and the furnace cooling water channel. The power of the external circulating water pump required to maintain the same flow and pressure is small, and external circulating water is only appropriately introduced for cooling during the high-temperature stage, so as to achieve energy saving and consumption reduction, reduce external circulation energy consumption, eliminate the use of heat exchangers, reduce the loss of circulating water pressure and flow, avoid the loss of heat exchange efficiency, and reduce maintenance costs.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A cooling pipeline for a heating furnace without a heat exchanger includes a furnace body cooling water channel, an inlet pipe connected to the inlet end of the furnace body cooling water channel, and an outlet pipe connected to the outlet end of the furnace body cooling water channel. The feature is that the outlet pipe is equipped with a flow control valve whose opening is controlled by a control system to achieve a three-way function, and the inlet pipe is equipped with a water storage tank. One end of the flow control valve is connected to the water storage tank.

[0008] Preferably, the water outlet pipe is equipped with a water outlet check valve located outside the flow control valve, a pressure gauge located outside the water outlet check valve, and a temperature sensor located inside the flow control valve to detect the water temperature at the outlet end of the furnace cooling water channel.

[0009] Preferably, the water inlet pipe is equipped with a water supply valve, a water pump, and a water inlet check valve. The water supply valve is connected to the water inlet end of the water storage tank, and the water pump and the water inlet check valve are connected in sequence to the water outlet end of the water storage tank.

[0010] Preferably, the water inlet pipe is equipped with a pressure sensor 1 located outside the water supply valve, a temperature sensor 2 located outside the water supply valve, and a pressure sensor 2 located inside the water inlet check valve.

[0011] Preferably, a bypass outlet pipe is connected in parallel to the outlet pipe, a bypass valve is installed on the bypass outlet pipe, the inner end of the bypass outlet pipe is connected to the inlet end of the flow control valve, and the outer end is connected to the outlet end of the outlet check valve; a bypass inlet pipe is connected in parallel to the inlet pipe, a bypass valve is installed on the bypass inlet pipe, the inner end of the bypass inlet pipe is connected to the outlet end of the inlet check valve, and the outer end is connected to the inlet end of the water supply valve.

[0012] Preferably, the water inlet pipes of multiple heating furnaces share a common water storage tank and water supply valve.

[0013] The beneficial effects of this utility model are:

[0014] This invention relates to a heat exchanger-free furnace cooling pipeline. The inlet pipeline connects to the inlet end of the furnace cooling water channel, and the outlet pipeline connects to the outlet end. A flow control valve on the outlet pipeline is connected to a water storage tank on the inlet pipeline. During furnace shutdown or low-temperature periods, the end of the flow control valve connected to the water storage tank is opened, while the inlet pipeline and outlet pipeline are closed, forming an internal circulation cooling system from the water storage tank, furnace cooling water channel, and flow control valve back to the water storage tank. This eliminates the need for external circulation, reducing energy consumption. During high-temperature periods in the furnace, the flow control valve and the water storage tank are closed. At one end connected to the water tank, the inlet pipe is opened and the outlet pipe is opened to introduce external circulating water for cooling. This forms an external circulation cooling system consisting of the inlet pipe, the furnace cooling water channel, and the outlet pipe, ensuring effective cooling of the heating furnace. The outlet and inlet pipes are close to the furnace cooling water channel, requiring less power from the external circulating water pump to maintain the same flow and pressure. External circulating water is only introduced appropriately during high-temperature stages to achieve energy saving and reduce energy consumption. This eliminates the need for a heat exchanger, reducing the loss of circulating water pressure and flow, avoiding heat exchange efficiency losses, and lowering maintenance costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the cooling pipeline of the heating furnace without a heat exchanger in Example 1.

[0016] Figure 2 This is a schematic diagram of the cooling pipeline of the heating furnace without a heat exchanger in Example 2.

[0017] Figure 3 This is a schematic diagram of the cooling pipeline of the heating furnace without a heat exchanger in Example 3. Detailed Implementation

[0018] The following is combined with Figures 1-3 The embodiments of this utility model will be described in detail below. Example 1:

[0019] A cooling pipeline for a heating furnace without a heat exchanger includes a furnace body cooling water channel 1, an inlet pipe 2 connected to the inlet end of the furnace body cooling water channel 1, and an outlet pipe 3 connected to the outlet end of the furnace body cooling water channel 1. The outlet pipe 3 is equipped with a flow control valve 4 whose opening is controlled by a control system to achieve a three-way function. The inlet pipe 2 is equipped with a water storage tank 5, and one end of the flow control valve 4 is connected to the water storage tank 5.

[0020] The cooling pipeline of the heat exchangerless heating furnace described above has an inlet pipe 2 connected to the inlet end of the furnace cooling water channel 1, and an outlet pipe 3 connected to the outlet end of the furnace cooling water channel 1. The flow control valve 4 on the outlet pipe 3 is connected to the water storage tank 5 on the inlet pipe 2. During the furnace shutdown or low-temperature stage, the end of the flow control valve 5 connected to the water storage tank 5 is opened, and the inlet of the inlet pipe 2 and the outlet of the outlet pipe 3 are closed, forming an internal circulation cooling from the water storage tank 5, the furnace cooling water channel 1, the flow control valve 4 to the water storage tank 5. The external circulation is not activated to reduce energy consumption. During the high-temperature stage of the heating furnace, the flow control valve is closed. 4. At the end connected to the water storage tank 5, the inlet pipe 2 and outlet pipe 3 are opened to introduce external circulating water for cooling, forming an external circulating cooling system consisting of the inlet pipe 2, the furnace cooling water channel 1, and the outlet pipe 3, ensuring effective cooling of the heating furnace. The outlet pipe 3 and the inlet pipe 2 are close to the furnace cooling water channel 1, requiring less power from the external circulating water pump to maintain the same flow and pressure. External circulating water is only introduced appropriately during high-temperature stages to achieve energy saving and consumption reduction, reduce external circulating energy consumption, eliminate the need for heat exchangers, reduce the loss of circulating water pressure and flow, avoid heat exchange efficiency loss, and reduce maintenance costs.

[0021] The water outlet pipe 3 is equipped with a one-way valve 6 located outside the flow control valve 4, a pressure gauge 7 located outside the one-way valve 6, and a temperature sensor 8 located inside the flow control valve 4 to detect the water temperature at the outlet of the furnace cooling water channel 1. The one-way valve 6 ensures that water can only flow out of the water outlet pipe 3 and not flow in. The pressure gauge 7 detects the water pressure flowing through the one-way valve 6. The temperature sensor 8 detects the water temperature at the outlet of the furnace cooling water channel 1 and transmits the detected water temperature information to the control system in real time. The control system controls the opening of the flow control valve 4 based on the real-time information transmitted by the temperature sensor 8 to achieve automatic switching between internal circulation cooling and internal circulation cooling. The flow control valve 4 can be an electric three-way valve or a valve group composed of multiple electric valves to achieve a three-way function.

[0022] The water inlet pipe 2 is equipped with a water supply valve 9, a water pump 10, and a water inlet check valve 11. The water supply valve 9 is connected to the water inlet end of the water storage tank 5, and the water pump 10 and the water inlet check valve 11 are connected to the water outlet end of the water storage tank 5 in sequence. The water supply valve 9 is used to adjust the water flow rate of the water inlet pipe 2 so as to adjust the water flow rate of the water inlet pipe 2 according to the needs of external circulation cooling. The water supply valve 9 can be a flow valve whose opening is adjusted by the control system, or a valve group that can be controlled by the control system to achieve multiple diameters. The water pump 10 pumps the water flowing out of the water storage tank to the water inlet check valve 11 to ensure that the water inlet pipe 2 can only supply water to the furnace cooling water channel 1 and cannot supply water out, and to increase the water pressure and ensure the water supply efficiency.

[0023] The water inlet pipe 2 is equipped with a pressure sensor 12 located outside the water supply valve 9, a temperature sensor 13 located outside the water supply valve 9, and a pressure sensor 14 located inside the water inlet check valve 9. The pressure sensor 12 and the temperature sensor 13 monitor the water pressure and temperature at the water inlet of the water inlet pipe 2 in real time, while the pressure sensor 14 monitors the water pressure entering the furnace cooling water channel 1 in real time. The pressure sensor 12, the temperature sensor 13, and the pressure sensor 14 transmit the corresponding detection information to the control system in real time, and the control system controls the water supply valve 9 to adjust its opening degree based on the real-time detection information. Example 2:

[0024] The difference from Example 1 is as follows: Figure 2 As shown, a bypass outlet pipe 15 is connected in parallel to the outlet pipe 3. A bypass valve 16 is installed on the bypass outlet pipe 15. The inner end of the bypass outlet pipe 15 is connected to the inlet end of the flow control valve 4, and the outer end is connected to the outlet end of the outlet check valve 6. A bypass inlet pipe 17 is connected in parallel to the inlet pipe 2. A bypass valve 16 is installed on the bypass inlet pipe 17. The inner end of the bypass inlet pipe 17 is connected to the outlet end of the inlet check valve 11, and the outer end is connected to the inlet end of the water supply valve 9. The bypass valves 16 on both the bypass outlet pipe 15 and the bypass inlet pipe 17 are normally closed. Under normal circumstances, the bypass outlet pipe 15 and the bypass inlet pipe 17 are disconnected. The bypass inlet pipe 15 is opened only when there is a fault in the inlet pipe 2 and the water cannot flow normally, to ensure the reliability of the water inlet. The bypass outlet pipe 17 is opened only when there is a fault in the outlet pipe 3 and the water cannot flow normally, to ensure the reliability of the water outlet. The bypass valve 16 is used to regulate the water flow on the corresponding bypass water line. Example 3:

[0025] The difference from Embodiment 1 is that the water inlet pipes 2 corresponding to multiple heating furnaces share a water storage tank 5 and a water supply valve 9. For example... Figure 3The heating furnace shown is a multi-furnace system. The furnace body cooling water channel 1 of each heating furnace is connected to the water inlet pipe 2 and the water outlet pipe 3. The water inlet pipes 2 of multiple heating furnaces share the same water storage tank 5 and water replenishment valve 9, which can effectively reduce the space occupied by the furnace group cooling system and reduce equipment costs.

[0026] The technical solutions of the embodiments of this utility model have been fully described above with reference to the accompanying drawings. It should be noted that the described embodiments are only a part of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

Claims

1. A cooling pipeline for a heating furnace without a heat exchanger, comprising a furnace body cooling water channel, an inlet pipe connected to the inlet end of the furnace body cooling water channel, and an outlet pipe connected to the outlet end of the furnace body cooling water channel, characterized in that: The outlet pipe is equipped with a flow control valve whose opening is controlled by the control system to achieve a three-way function, and the inlet pipe is equipped with a water storage tank. One end of the flow control valve is connected to the water storage tank.

2. The cooling pipeline for a heat exchangerless heating furnace according to claim 1, characterized in that: The water outlet pipeline is equipped with a water outlet check valve located outside the flow control valve, a pressure gauge located outside the water outlet check valve, and a temperature sensor located inside the flow control valve to detect the water temperature at the outlet end of the furnace cooling water channel.

3. The cooling pipeline for a heat exchangerless heating furnace according to claim 2, characterized in that: The water inlet pipeline is equipped with a water supply valve, a water pump, and a water inlet check valve. The water supply valve is connected to the water inlet end of the water storage tank, and the water pump and the water inlet check valve are connected in sequence to the water outlet end of the water storage tank.

4. The cooling pipeline for a heat exchangerless heating furnace according to claim 3, characterized in that: The water inlet pipe is equipped with a pressure sensor 1 located outside the water supply valve, a temperature sensor 2 located outside the water supply valve, and a pressure sensor 2 located inside the water inlet check valve.

5. The cooling pipeline for a heat exchangerless heating furnace according to claim 3, characterized in that: A bypass outlet pipe is connected in parallel to the outlet pipe, and a bypass valve is installed on the bypass outlet pipe. The inner end of the bypass outlet pipe is connected to the inlet end of the flow control valve, and the outer end is connected to the outlet end of the outlet check valve. A bypass inlet pipe is connected in parallel to the inlet pipe, and a bypass valve is installed on the bypass inlet pipe. The inner end of the bypass inlet pipe is connected to the outlet end of the inlet check valve, and the outer end is connected to the inlet end of the water supply valve.

6. The cooling pipeline for a heat exchangerless heating furnace according to claim 3, characterized in that: Multiple heating furnaces share a common water storage tank and water supply valve for their corresponding water inlet pipes.

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