Electrode-type heating system hydrogen explosion prevention design device

Abstract

The application discloses a full-submersion electrode hot water boiler hydrogen explosion prevention design device, which comprises an electrode hot water boiler, a primary side circulation system, and a constant pressure water supplementing device, the electrode hot water boiler and the primary side circulation system form a closed circulation, the constant pressure water supplementing device is used for constant pressure and water supplementing of the electrode hot water boiler and the primary side circulation system, an electrode probe for controlling the full water level of the boiler and an automatic exhaust valve are arranged on the top of the electrode hot water boiler, an automatic exhaust valve is arranged on the highest end of the pipeline of the primary side circulation system, the primary side constant pressure water supplementing ensures constant pressure and full water in the electric boiler and the primary side circulation system; the shell is always filled with water, the top of the shell is provided with water, the top of the shell is connected with an exhaust pipe, and the exhaust pipe is connected with an automatic exhaust valve. The application has the beneficial effects that there is no space for containing gas in the shell, gas can be discharged in time, static electricity triggering is prevented, and hydrogen explosion accidents of the shell are avoided.

Description

[0001] This application is a divisional application of the invention entitled "Design Device for Hydrogen Explosion Prevention of Fully Immersed Electrode Hot Water Boiler", filed on June 14, 2022, with application number 2022106718053. Technical Field

[0002] This invention relates to the field of boilers, and more particularly to a hydrogen explosion prevention design device for a fully submerged electrode hot water boiler. Background Technology

[0003] Hydrogen is a flammable and explosive gas, and also an important industrial gas widely used in various industries. When hydrogen is generated during production, use, and equipment operation, it is crucial to pay close attention to its leakage concentration to prevent accidents.

[0004] The process of a hydrogen explosion occurs when the hydrogen content in a certain space (such as a sealed container) is at its explosive limit. When it encounters an open flame or static electricity, it triggers the combustion of hydrogen and releases a large amount of heat. This causes the generated water vapor to expand in volume and its pressure to increase rapidly. The combustion is completed in a very short time, and at the same time, it ignites the surrounding mixed gas, causing the pressure inside the space to increase rapidly, resulting in an explosion.

[0005] Hydrogen will explode when the following three environmental conditions are met simultaneously: 1. The mixed gas must be placed in the same container; 2. When the volume concentration of hydrogen in the air is between 4.0% and 75.6%, it forms an explosive mixture; 3. There is an open flame or static electricity that may trigger the hydrogen combustion. The design of hydrogen explosion prevention measures for fully submerged electrode hot water boilers is based on the absence of these three conditions: the boiler shell is filled with water, there is no air mixture, and static electricity is prevented, ensuring that hydrogen explosions will not occur in the electrode hot water boiler.

[0006] Although high-voltage electrode hot water boilers use industrial frequency AC power, the large current flowing through the phase electrode and zero electrode in the sodium phosphate electrolyte during work will more or less ionize the water in the electrolyte. Therefore, current electrode hot water boilers produce a small amount of hydrogen. If the structural design of the electrode hot water boiler does not take precautions, there is a risk of explosion. Summary of the Invention

[0007] To address the aforementioned problems, this invention proposes a hydrogen explosion prevention design device for a fully submerged electrode hot water boiler.

[0008] The technical solution adopted in this invention is as follows:

[0009] A hydrogen explosion prevention design device for a fully submerged electrode hot water boiler, comprising an electrode hot water boiler, a primary side circulation system, and a constant pressure water supply device, wherein the electrode hot water boiler and the primary side circulation system form a closed loop, and the constant pressure water supply device provides constant pressure and water supply for the electrode hot water boiler and the primary side circulation system. The device is characterized in that a water level electrode probe for controlling the full water level inside the electrode hot water boiler shell and an automatic exhaust valve for automatically discharging ionized gases from the electrolyte are installed at the top of the electrode hot water boiler. The pipeline of the primary side circulation system is at its highest point... An automatic vent valve is installed at the location, and the constant pressure water supply device can ensure that the electrode hot water boiler and the primary side circulation system pipeline are always at constant pressure and full of water; the electrode hot water boiler shell is always full of water, and there is no space for mixed gas to remain at the top of the shell; a drain pipe is provided at the top of the electrode hot water boiler shell, and an automatic vent valve is installed on the drain pipe to discharge the gas in the shell; the electrode hot water boiler shell is provided with a zero-sequence current cable terminal and an anti-static trigger grounding protection bus connection terminal; the electrode hot water boiler shell is provided with a water inlet and a water outlet, which are located between the top and bottom of the shell.

[0010] In this installation structure, an exhaust pipe and an automatic exhaust valve are installed at the top of the shell. The exhaust pipe and valve are used to remove gas from the shell. An electrode probe is installed at the top of the shell to monitor whether the water level inside the shell has reached the top. Therefore, in this structure, the exhaust pipe and automatic exhaust valve are used to promptly remove gas from the shell, while the electrode probe is used to detect whether the shell is full of water. Since the shell is always full of water during use, the above solution ensures that the shell is always full of water, and the exhaust pipe and automatic exhaust valve remove gas from the top of the shell. At the same time, the electrode probe is used to detect the water level at the top of the shell, ensuring that the top of the shell is always full of water. This prevents the shell from having any space to contain gas and promptly removes any generated gas, preventing static electricity triggering. This avoids the accident of hydrogen explosion inside the shell of the electrode hot water boiler.

[0011] Optionally, the primary circulation system includes an inlet pipe, an outlet pipe, and a heat exchanger. The outlet of the electrode hot water boiler is connected to the heat exchanger through the outlet pipe. The inlet of the electrode hot water boiler is connected to the heat exchanger through the inlet pipe. The automatic air vent is located at the highest point of the outlet pipe.

[0012] Because this electrode hot water boiler is an electrode hot water boiler, it is used to provide heat to users through a heat exchanger. Therefore, a heat exchanger is installed. The hot water in the shell enters the heat exchanger for heat exchange and then returns to the shell. In order to prevent air from entering the shell during the above circulation process, an automatic air vent valve is installed on the outlet pipe to remove the gas generated during the circulation process in a timely manner.

[0013] Optionally, the constant pressure water supply device includes a diaphragm pressure tank and an atmospheric pressure diaphragm tank, and a water supply pipe is connected to the water inlet pipe. Both the diaphragm pressure tank and the atmospheric pressure diaphragm tank are connected to the water supply pipe.

[0014] Because water is lost during circulation between the heat exchanger and the shell, and this reduction in water volume can prevent the top of the shell from being fully submerged, a water supply pipe is installed to replenish water to the shell, ensuring the entire circulation system is always filled with water. Simultaneously, to prevent gas from entering during the water supply process, a diaphragm pressure tank and an atmospheric pressure diaphragm tank are installed. These tanks degas the gas passing through the water supply pipe, preventing gas from entering the shell through the water supply pipe.

[0015] The beneficial effects of this invention are: by using an exhaust pipe and an exhaust valve to discharge the gas at the top of the shell, and by using an electrode probe to detect the water level at the top of the shell, the top of the shell is always filled with water, so that there is no space inside the shell to contain gas, thus avoiding the accident of hydrogen explosion in the shell. Attached Figure Description

[0016] Figure 1 This is a simplified schematic diagram of a hydrogen explosion prevention design device for a fully submerged electrode hot water boiler.

[0017] The attached figures are labeled as follows: 1. Automatic air vent valve; 2. Air vent pipe; 3. Electrode probe; 4. Water outlet pipe; 5. Water inlet pipe; 6. Electrode hot water boiler; 601. Water outlet; 602. Water inlet; 7. Heat exchanger; 8. Water supply pipe; 901. Diaphragm pressure tank; 902. Atmospheric pressure diaphragm tank; 10. Zero-sequence current cable terminal; 11. Grounding protection busbar connection terminal; 12. Grounding resistance. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings.

[0019] As attached Figure 1As shown, a hydrogen explosion prevention design device for a fully submerged electrode hot water boiler 6 includes an electrode hot water boiler 6, a primary side circulation system, and a constant pressure water supply device. The electrode hot water boiler 6 and the primary side circulation system form a closed loop. The constant pressure water supply device maintains constant pressure and supplies water to the electrode hot water boiler 6 and the primary side circulation system. An electrode probe 3 for controlling the boiler's full water level and an automatic air vent valve 1 are installed at the top of the electrode hot water boiler 6. An automatic air vent valve 1 is installed at the highest point of the primary side circulation system's pipes. The constant pressure water supply ensures that the boiler and the primary side circulation system are always under constant pressure and full of water. The shell of the electrode hot water boiler 6... The interior is always filled with water. There is water at the top of the shell of the electrode hot water boiler 6. An exhaust pipe 2 is connected to the top of the shell, and an automatic exhaust valve 1 is connected to the exhaust pipe 2. The shell of the electrode hot water boiler is equipped with a zero-sequence current cable terminal 10 and an anti-static trigger grounding protection bus connection terminal 11. The zero-sequence current cable terminal 10 is used to connect the zero-sequence current cable, while the grounding protection bus connection terminal 11 is used to connect the grounding resistor 12. The grounding resistor 12 is buried in the ground. The shell of the electrode hot water boiler 6 is equipped with a water inlet 602 and a water outlet 601, which are located between the top and bottom of the shell.

[0020] In this installation structure, an exhaust pipe 2 and an automatic exhaust valve 1 are installed at the top of the shell. The function of the exhaust pipe 2 and the exhaust valve is to remove gas from the shell. An electrode probe 3 is installed at the top of the shell to monitor whether the water level inside the shell of the electrode hot water boiler 6 has reached the top of the shell. Therefore, in this structure, the exhaust pipe 2 and the automatic exhaust valve 1 are installed to remove gas from the shell in a timely manner. At the same time, the electrode probe 3 is used to detect whether the shell is full of water. In this structure, the shell is always full of water during use. Therefore, the above solution ensures that the shell is always full of water, and the exhaust pipe 2 and the automatic exhaust valve 1 remove gas from the top of the shell. At the same time, the electrode probe 3 is used to detect the water level at the top of the shell, ensuring that the top of the shell is always full of water. This prevents the shell from having any space to contain gas, removes internal gas in a timely manner, prevents static electricity triggering, and avoids the accident of hydrogen explosion in the shell.

[0021] As attached Figure 1 As shown, the primary circulation system includes an inlet pipe 5, an outlet pipe 4, and a heat exchanger 7. The outlet 601 of the electrode hot water boiler 6 is connected to the heat exchanger 7 through the outlet pipe 4. The inlet 602 of the electrode hot water boiler 6 is connected to the heat exchanger 7 through the inlet pipe 5. An automatic air vent valve 1 is installed on the outlet pipe 4, and the automatic air vent valve 1 is located at the highest end of the outlet pipe 4.

[0022] Because this electrode hot water boiler 6 is an electrode hot water boiler, this type of hot water boiler is used to provide heat to the user through the heat exchanger 7. Therefore, the heat exchanger 7 is installed. The hot water in the shell enters the heat exchanger 7 for heat exchange and then returns to the shell. In order to prevent air from entering the shell during the above circulation process, an automatic air vent valve 1 is installed on the water outlet pipe 4 to promptly release the gas generated during the circulation process.

[0023] As attached Figure 1 As shown, the constant pressure water supply equipment includes a diaphragm pressure tank 901 and an atmospheric pressure diaphragm tank 902. A water supply pipe 8 is connected to the water inlet pipe 5. Both the diaphragm pressure tank 901 and the atmospheric pressure diaphragm tank 902 are connected to the water supply pipe 8.

[0024] Because water is lost during the circulation between heat exchanger 7 and the shell, and the reduction in water volume can prevent the top of the shell from being fully submerged, a water supply pipe 8 is installed to replenish water to the shell, ensuring that the entire circulation system is always filled with water. Simultaneously, to prevent gas from entering during the water supply process, a diaphragm pressure tank 901 and an atmospheric pressure diaphragm tank 902 are installed to degas the gas passing through the water supply pipe 8, preventing gas from entering the shell through the water supply pipe 8.

[0025] The above description is only a preferred embodiment of the present invention and does not limit the scope of patent protection of the present invention. Any equivalent modifications made based on the present invention specification, whether directly or indirectly applied to other related technical fields, are similarly included within the scope of protection of the present invention.

Claims

1. A hydrogen explosion prevention design device for an electrode-type heating system, comprising an electrode hot water boiler, a primary side circulation system, and a constant pressure water supply device; wherein the electrode hot water boiler and the primary side circulation system form a closed loop; the constant pressure water supply device provides constant pressure and water supply for the electrode hot water boiler and the primary side circulation system; characterized in that, The top of the electrode hot water boiler is equipped with a water level electrode probe to control the full water level inside the boiler shell, and an automatic vent valve to automatically discharge the ionized gas from the electrolyte; an automatic vent valve is installed at the highest point of the primary circulation system pipeline; the constant pressure water supply equipment ensures that the electrode hot water boiler and the primary circulation system pipeline are always at constant pressure and full of water; the electrode hot water boiler shell is always filled with water, and there is no space for mixed gas to remain at the top of the shell; an exhaust pipe is provided at the top of the electrode hot water boiler shell; an automatic vent valve is installed on the exhaust pipe to discharge the gas inside the shell; a zero-sequence current cable terminal and an anti-static trigger grounding protection bus connection terminal are provided on the electrode hot water boiler shell; The primary circulation system includes an inlet pipe, an outlet pipe, and a heat exchanger; the outlet of the electrode hot water boiler is connected to the heat exchanger via the outlet pipe; the inlet of the electrode hot water boiler is connected to the heat exchanger via the inlet pipe. The constant pressure water supply equipment includes a diaphragm pressure tank and an atmospheric pressure diaphragm tank; a water supply pipe is connected to the inlet pipe.

2. The hydrogen explosion prevention design device for the electrode-type heating system as described in claim 1, characterized in that, The automatic air vent valve of the primary circulation system is located at the highest point of the outlet pipe.

3. The hydrogen explosion prevention design device for the electrode-type heating system as described in claim 1, characterized in that, Both the diaphragm pressure tank and the atmospheric pressure diaphragm tank are connected to the water supply pipe.

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