High-temperature high-pressure electrically heated steam generator

Abstract

The application discloses a high-temperature and high-pressure electric heating steam generating device, which comprises a first tank body, a second tank body, a third tank body, a first electric heating wire assembly, a second electric heating wire assembly and a third electric heating wire assembly; the first electric heating wire assembly is arranged in the first tank body, the second electric heating wire assembly is arranged in the second tank body, the third electric heating wire assembly is arranged in the third tank body, the first tank body is connected with the second tank body through a pipeline, the second tank body is connected with the third tank body through a pipeline, a plunger pump is connected to the first tank body, the first tank body is filled with water, the second tank body is filled with gas, the water temperature in the first tank body is lower than that in the second tank body, and the third tank body is filled with gas. The device has the beneficial effects that water is preheated and heated first, then enters the third tank body to be heated into steam, and there is no water vapor mixture in the whole process, the pressure resistance of the equipment is greatly reduced, and the service life is greatly increased.

Description

Technical Field

[0001] This invention relates to the field of steam generation, and more particularly to a high-temperature, high-pressure electrically heated steam generator. Background Technology

[0002] Currently, a large amount of high-temperature steam is needed in industrial and agricultural production. Patent publication CN115264954A discloses a three-tube high-temperature and high-pressure electric heating steam generator. This three-tube high-temperature and high-pressure electric heating steam generator first heats water into a water-steam mixture in one tube, and then heats the water-steam mixture into steam. This method of first heating water into a water-steam mixture and then heating it into steam has the following drawbacks: First, the energy consumption (under the condition that the final steam temperature is the same) is relatively high. Second, due to the large temperature difference between water and steam, the resulting temperature difference stress is too large, which places higher requirements on the pressure resistance of the tubes. Third, the steam-water mixture is prone to water hammer, vibration, noise and temperature stratification during equipment operation, which affects the service life of the equipment. Summary of the Invention

[0003] To address the above-mentioned problems, this invention proposes a high-temperature, high-pressure electrically heated steam generator.

[0004] The technical solution adopted in this invention is as follows:

[0005] A high-temperature, high-pressure electrically heated steam generator includes a first tank, a second tank, a third tank, a first heating wire assembly, a second heating wire assembly, and a third heating wire assembly. The first heating wire assembly is disposed in the first tank, the second heating wire assembly is disposed in the second tank, and the third heating wire assembly is disposed in the third tank. The first tank is connected to the second tank via a pipe, and the second tank is connected to the third tank via a pipe. A plunger pump is connected to the first tank. The first tank is filled with water, the second tank is filled with water, the water temperature in the first tank is lower than that in the second tank, and the third tank is filled with gas.

[0006] The working principle of this high-temperature and high-pressure electric heating steam generator is as follows: First, the plunger pump pumps low-temperature water (around 20°C) into the first tank. The first heating wire assembly in the first tank heats the water in the first tank. After heating, the water temperature rises. Because the plunger pump continuously pumps water into the first tank, the water in the first tank is transported into the second tank under the action of water pressure after the temperature rises. The water in the second tank is further heated by the second heating wire assembly. After being further heated in the second tank, the water enters the third tank and is heated into steam.

[0007] In the above process, the water is first preheated and heated before entering the third tank to be heated into steam. There is no water-steam mixture stage in the whole process, which greatly reduces the pressure resistance of the equipment and greatly increases the service life of the equipment.

[0008] Optionally, the first tank is connected to a first drain pipe, and the third tank is connected to a second drain pipe.

[0009] The function of the first and second sewage pipes is to discharge sewage.

[0010] Optionally, it also includes an inner column and a sleeve. The outer wall of the inner column is provided with a spiral groove. The inner column is disposed inside the sleeve, and a spiral liquid passage is formed between the inner column and the sleeve. The inner column and the sleeve are both disposed in the pipe connecting the second tank and the third tank. Water in the second tank enters the third tank through the liquid passage. The opening of the spiral groove increases from narrow to wide. The opening of the spiral groove on the side closer to the third tank is larger than the opening on the side closer to the second tank.

[0011] The inner column and the sleeve work together to form a water-passing piston. Water from the second tank enters the third tank through this piston. After passing through the spiral groove, the water flows into the third tank. As the water passes through the spiral groove, its flow direction changes from a straight line to a curve, which reduces the water flow rate and allows the water to fully contact the third heating wire assembly in the third tank, facilitating rapid heating of the water into steam. At the same time, the presence of this piston allows it to adapt and prevent steam from flowing back into the second tank, even when the pressure in the third tank is high (or the plunger pump pressure is insufficient) and steam tends to move from the third tank into the second tank.

[0012] Optionally, the inner post and the sleeve are joined together by a pin, and the pin is perpendicular to both the inner post and the sleeve.

[0013] The inner column and the sleeve are joined together by a pin to ensure a stable fit. They can also be disassembled for cleaning when needed. Specifically, the inner column and the sleeve are fitted with an interference fit.

[0014] Optionally, the sleeve is a metal sleeve, the inner column is a metal inner column, the roughness Ra value of the inner wall of the sleeve is greater than 12.5, and the roughness Ra value of the groove wall of the spiral groove is greater than 12.5.

[0015] The inner wall of the sleeve has a roughness Ra value greater than 12.5, and the groove wall of the spiral groove has a roughness Ra value greater than 12.5. This ensures that the surfaces that water comes into contact with when flowing through the liquid channel are rough surfaces. The rough surfaces can effectively adsorb impurities contained in the water, thereby effectively purifying the water and ensuring that the generated steam has good cleanliness.

[0016] Optionally, the outer wall of the sleeve is slidably fitted with the inner wall of the pipe, and the outer diameter of the sleeve is equal to the inner diameter of the pipe.

[0017] Optionally, the inner wall of the pipe is provided with limiting protrusions, and there are two limiting protrusions, with the sleeve located between the two limiting protrusions.

[0018] Specifically, the piston formed by the sleeve and the inner column can slide between two limiting protrusions. The sleeve and the inner column form a piston located between the two limiting protrusions, and the function of the two limiting protrusions is to limit the movement of the piston. The piston can only move between the two limiting protrusions.

[0019] Optionally, the third tank is provided with a steam outlet.

[0020] Specifically, the function of the steam outlet is to serve as a channel for steam to leave the third tank.

[0021] The beneficial effects of this invention are: water is first preheated and heated before entering the third tank to be heated into steam. There is no water-steam mixture stage in the whole process, which greatly reduces the pressure resistance of the equipment and greatly increases the service life of the equipment. Attached image description:

[0022] Figure 1 This is a simplified schematic diagram of a high-temperature, high-pressure electrically heated steam generator.

[0023] Figure 2 This is a schematic diagram showing the positional relationship between the first tank and the second tank;

[0024] Figure 3 This is a simplified diagram illustrating the fit between the inner column and the sleeve.

[0025] Figure 4 This is a schematic diagram illustrating the working principle of the inner column and sleeve inside the pipeline.

[0026] The figures are labeled as follows: 1. Plunger pump; 201. First tank; 202. Second tank; 203. Third tank; 2031. Steam outlet; 301. First heating wire assembly; 302. Second heating wire assembly; 303. Third heating wire assembly; 4. Pressure gauge; 5. Inner column; 501. Spiral groove; 6. Sleeve; 7. Pin; 8. Pipe; 801. Limiting protrusion; 901. First drain pipe; 902. Second drain pipe. Detailed implementation method:

[0027] The present invention will now be described in detail with reference to the accompanying drawings.

[0028] As attached Figure 1 Appendix Figure 2 Appendix Figure 3 and appendix Figure 4 As shown, a high-temperature and high-pressure electrically heated steam generator includes a first tank 201, a second tank 202, a third tank 203, a first heating wire assembly 301, a second heating wire assembly 302, and a third heating wire assembly 303. The first heating wire assembly 301 is disposed in the first tank 201, the second heating wire assembly 302 is disposed in the second tank 202, and the third heating wire assembly 303 is disposed in the third tank 203. The first tank 201 is connected to the second tank 202 via a pipe 8, and the second tank 202 is connected to the third tank 203 via a pipe 8. A plunger pump 1 is connected to the first tank 201. The first tank 201 is filled with water, the second tank 202 is filled with water, and the water temperature in the first tank 201 is lower than that in the second tank 202. The third tank 203 is filled with gas.

[0029] The working principle of this high-temperature and high-pressure electric heating steam generator is as follows: First, the plunger pump 1 pumps low-temperature water (water temperature around 20℃) into the first tank 201. The first heating wire assembly 301 in the first tank 201 heats the water in the first tank 201. After heating, the water temperature rises. Because the plunger pump 1 continuously pumps water into the first tank 201, the water in the first tank 201 is transported into the second tank 202 under the action of water pressure after the temperature rises. The water in the second tank 202 is further heated by the second heating wire assembly 302. After being further heated in the second tank 202, the water enters the third tank 203 and is heated into steam.

[0030] In the above process, the water is first preheated and heated before entering the third tank 203 to be heated into steam. There is no water-steam mixture stage in the whole process, which greatly reduces the pressure resistance of the equipment and greatly increases the service life of the equipment.

[0031] As attached Figure 1 Appendix Figure 2 Appendix Figure 3 and appendix Figure 4 As shown, the first tank 201 is connected to the first drain pipe 901, and the third tank 203 is connected to the second drain pipe 902.

[0032] The function of the first sewage pipe 901 and the second sewage pipe 902 is to discharge sewage.

[0033] As attached Figure 1 Appendix Figure 2 Appendix Figure 3 and appendix Figure 4 As shown, it also includes an inner column 5 and a sleeve 6. A spiral groove 501 is provided on the outer wall of the inner column 5. The inner column 5 is set inside the sleeve 6, and a spiral liquid passage is formed between the inner column 5 and the sleeve 6. The inner column 5 and the sleeve 6 are both set in the pipe 8 connecting the second tank 202 and the third tank 203. Water in the second tank 202 enters the third tank 203 through the liquid passage. The groove opening of the spiral groove 501 is in a state of increasing from narrow to wide. The groove opening of the spiral groove 501 on the side closer to the third tank 203 is larger than the groove opening on the side closer to the second tank 202.

[0034] The inner column 5 and the sleeve 6 work together to form a water-passing piston. Water in the second tank 202 enters the third tank 203 through this water-passing piston. After passing through the spiral groove 501, the water enters the third tank 203. When the water passes through the spiral groove 501, the flow direction changes from a straight line to a spiral curve. This reduces the water flow rate, allowing the water to fully contact the third heating wire assembly 303 in the third tank 203, facilitating the rapid heating of the water into steam. At the same time, the presence of this piston allows it to adapt even when the pressure in the third tank 203 is high (or the pump pressure of the plunger pump 1 is insufficient), causing the steam in the third tank 203 to tend to move into the second tank 202. This prevents the steam from flowing back into the second tank 202.

[0035] The entire process can be found in the appendix. Figure 4 As shown, attached Figure 4 To the left of pipe 8 is the third tank 203, and to the right of pipe 8 is the second tank 202. Figure 4 The arrows indicate the direction of water flow. During operation, water flows from right to left under the action of plunger pump 1. In the third tank 203, the water is heated into steam. When the steam pressure in the third tank 203 is too high, the steam tends to move to the right. Due to the characteristic of the spiral groove 501 being narrow on the right and wide on the left, the steam experiences greater pressure as it moves to the right (and pushes the entire piston to move to the right). When the steam pressure and water pressure are balanced, the piston cannot move, thus preventing backflow of steam. At the same time, the piston can ensure the balance of pressure on both sides during its back-and-forth movement.

[0036] As attached Figure 1 Appendix Figure 2 Appendix Figure 3 and appendix Figure 4 As shown, the inner column 5 and the sleeve 6 are joined together by a pin 7, and the pin 7 is perpendicular to the inner column 5 and the sleeve 6.

[0037] The inner column 5 and the sleeve 6 are connected by a pin 7 to ensure that they can be stably connected. They can also be disassembled for cleaning when needed. Specifically, the inner column 5 and the sleeve 6 are connected by an interference fit.

[0038] As attached Figure 1 Appendix Figure 2 Appendix Figure 3 and appendix Figure 4 As shown, the sleeve 6 is made of metal, the inner column 5 is made of metal, the roughness Ra value of the inner wall of the sleeve 6 is greater than 12.5, and the roughness Ra value of the groove wall of the spiral groove 501 is greater than 12.5.

[0039] The inner wall roughness Ra value of the sleeve 6 is greater than 12.5, and the groove wall roughness Ra value of the spiral groove 501 is greater than 12.5. This ensures that the surfaces that water comes into contact with when flowing in the liquid channel are rough surfaces. The rough surfaces can effectively adsorb impurities contained in the water, thereby effectively purifying the water and ensuring that the generated steam has good cleanliness.

[0040] As attached Figure 1 Appendix Figure 2 Appendix Figure 3 and appendix Figure 4 As shown, the outer wall of the sleeve 6 is slidably fitted with the inner wall of the pipe 8 (which is the pipe between the second tank and the third tank), and the outer diameter of the sleeve 6 is equal to the inner diameter of the pipe 8.

[0041] As attached Figure 1 Appendix Figure 2 Appendix Figure 3 and appendix Figure 4 As shown, there are two limiting protrusions 801 on the inner wall of the pipe 8, and the sleeve 6 is located between the two limiting protrusions 801.

[0042] Specifically, the piston formed by the sleeve 6 and the inner column 5 can slide between the two limiting protrusions 801. The sleeve 6 and the inner column 5 form a piston located between the two limiting protrusions 801, and the function of the two limiting protrusions 801 is to limit the movement of the piston. The piston can only move between the two limiting protrusions 801.

[0043] As attached Figure 1 Appendix Figure 2 Appendix Figure 3 and appendix Figure 4 As shown, the third tank 203 is provided with a steam outlet 2031.

[0044] Specifically, the function of steam outlet 2031 is to serve as a channel for steam to leave the third tank 203.

[0045] Specifically, the overall structure of this device adopts a skid-mounted unit with a plunger pump and heating wire assembly, which is compact and easy to install.

[0046] Specifically, this device employs a three-tank system for stepped heating of water, resulting in adjustable steam flow rate and stepless adjustment of steam pressure and temperature. Operation is convenient and simple. Furthermore, the steam production process is energy-efficient and environmentally friendly, boasting high thermal efficiency and energy conversion efficiency, with no flue gas emissions, making it more environmentally friendly than gas-fired steam boilers. The steam produced by this device covers a wide pressure and temperature range, far exceeding that of ordinary steam generators and similar products, and can also produce saturated or superheated steam as needed.

[0047] In this high-temperature and high-pressure electric heating steam generator, the pumping pressure of the plunger pump can be adjusted according to the required steam pressure.

[0048] The above description is merely 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 content of 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 high-temperature, high-pressure electrically heated steam generator, characterized in that, The system includes a first tank, a second tank, a third tank, a first heating wire assembly, a second heating wire assembly, and a third heating wire assembly. The first heating wire assembly is disposed in the first tank, the second heating wire assembly is disposed in the second tank, and the third heating wire assembly is disposed in the third tank. The first tank is connected to the second tank via a pipe, and the second tank is connected to the third tank via a pipe. A plunger pump is connected to the first tank. The first tank is filled with water, the second tank is filled with water, the water temperature in the first tank is lower than that in the second tank, and the third tank is filled with gas. It also includes an inner column and a sleeve. The outer wall of the inner column is provided with a spiral groove. The inner column is set inside the sleeve. A spiral liquid passage is formed between the inner column and the sleeve. The inner column and the sleeve are both set in the pipe connecting the second tank and the third tank. Water in the second tank enters the third tank through the liquid passage. The opening of the spiral groove increases from narrow to wide. The opening of the spiral groove on the side closer to the third tank is larger than the opening on the side closer to the second tank. The inner column and the sleeve are joined together by a pin, and the pin is perpendicular to the inner column and the sleeve. The sleeve is made of metal, the inner column is made of metal, the roughness Ra value of the inner wall of the sleeve is greater than 12.5, and the roughness Ra value of the groove wall of the spiral groove is greater than 12.

5. The outer wall of the sleeve is slidably fitted with the inner wall of the pipe, and the outer diameter of the sleeve is equal to the inner diameter of the pipe. The inner wall of the pipe is provided with limiting protrusions, and there are two limiting protrusions. The sleeve is located between the two limiting protrusions.

2. The high-temperature and high-pressure electrically heated steam generator as described in claim 1, characterized in that, The first tank is connected to a first drain pipe, and the third tank is connected to a second drain pipe.

3. The high-temperature and high-pressure electrically heated steam generator as described in claim 1, characterized in that, The third tank is equipped with a steam outlet.

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