An electric boiler system that generates steam using direct electromagnetic heating.

Abstract

An electric boiler system employing direct electromagnetic heating to generate steam is disclosed, relating to the field of electromagnetic heating steam boilers. This addresses the problem that existing electric boilers cannot produce high-parameter steam. The system includes a feedwater pump, a water heater, a phase change heater, and a steam heater, arranged sequentially and connected along the water flow direction. All three are electromagnetic heaters. The feedwater pump delivers demineralized water to the water heater for heating. After heating, the demineralized water is fed into the phase change heater for phase change. The steam generated by the phase change heater is then fed into the steam heater for further heating to obtain superheated steam. This application primarily generates superheated steam through electromagnetic heating.

Description

Technical Field

[0001] This application relates to the field of electromagnetic heating steam boilers, and more particularly to an electric boiler system that uses electromagnetic direct heating to generate steam. Background Technology

[0002] The rapid development of new energy sources has led to problems with grid connection and consumption, resulting in a significant amount of electricity being wasted. Meanwhile, the demand for industrial steam is substantial. For example, the oilfield industry is accelerating the electrification of its energy-consuming equipment, vigorously promoting the replacement of gas compressors with electric compressors and oil drilling rigs with electric drilling rigs to increase electrification rates and green energy consumption capacity. Currently, a key technological challenge in electrification is the inability to generate high-parameter steam. Industries such as oilfields and steel have a strong demand for high-parameter steam from electrification. Existing electric boilers, such as electrode boilers and electromagnetic boilers, also face technical difficulties in achieving high-parameter steam output. Summary of the Invention

[0003] In view of this, this application provides an electric boiler system that generates steam by direct electromagnetic heating, which can generate high-pressure superheated steam through electromagnetic heating.

[0004] To solve the above-mentioned technical problems, the technical solution adopted in this application is as follows:

[0005] An electric boiler system that generates steam using direct electromagnetic heating includes a feedwater pump, a water heater, a phase change heater, and a steam heater. The feedwater pump, water heater, phase change heater, and steam heater are arranged sequentially and connected along the direction of water flow. The water heater, phase change heater, and steam heater are all electromagnetic heaters. The feedwater pump delivers demineralized water to the water heater for heating. After the demineralized water is heated, it is fed into the phase change heater for phase change. The steam generated by the phase change heater is fed into the steam heater for further heating to obtain superheated steam.

[0006] Furthermore, it also includes a steam drum, a feedwater pump, a water heater, a steam drum, and a steam heater arranged sequentially and connected in the direction of water flow. The steam drum is connected to the phase change heater and forms a self-circulation system.

[0007] Furthermore, a downcomer, a steam-water outlet pipe, and a distribution pipe are provided between the steam drum and the phase change heater. The outlet of the steam drum is connected to the inlet of the downcomer, the outlet of the downcomer is connected to the inlet of the distribution pipe, the outlet of the distribution pipe is connected to the inlet of the phase change heater, the steam outlet of the phase change heater is connected to the steam inlet of the steam-water outlet pipe, and the steam outlet of the steam-water outlet pipe is connected to the steam inlet of the steam drum.

[0008] Furthermore, the heat exchange tubes of the water heater's heating surface are serpentine tubes and are arranged horizontally.

[0009] Furthermore, the heat exchange tubes of the heating surface of the steam heater are serpentine tubes and are arranged horizontally.

[0010] Furthermore, the serpentine pipe is a metal pipe.

[0011] Furthermore, the heat exchange tubes of the phase change heater's heating surface are straight tubes and are arranged vertically; an upper header and a lower header are respectively provided at the upper and lower ends of the straight tubes, the straight tubes are connected to both the upper and lower headers, the lower header is connected to the distribution pipe, and the upper header is connected to the steam and water outlet pipe.

[0012] Furthermore, the straight-through pipe is a metal pipe.

[0013] The beneficial effects of this application compared to the prior art are:

[0014] 1. This application designs a water heater, a phase change heater, and a steam heater. First, the demineralized water is electromagnetically heated to increase its temperature, so that the water entering the phase change heater has a higher temperature and the phase change rate is increased. This allows a large amount of steam to be obtained. Then, the steam heater further heats the steam to obtain high-quality superheated steam to meet the user's needs.

[0015] 2. The water heater, phase change heater and steam heater of this application can obtain superheated steam by electromagnetic heating, which is more environmentally friendly than coal combustion heating.

[0016] 3. This application can separate the steam and water mixture delivered by the water heater through the design of the steam drum to obtain saturated steam and saturated water. The saturated steam is led to the steam heater for further heating. In this way, the water in the steam drum will have a density difference with the water in the phase change heater and will flow into the phase change heater for phase change.

[0017] 4. The straight pipes in the phase change heater of this application are arranged vertically, which can reduce the resistance to the flow of the working fluid and ensure equipment safety compared with the horizontal arrangement. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are provided to further illustrate this application.

[0019] Figure 1 This is a flowchart of an electric boiler system that generates steam using direct electromagnetic heating, as described in Example 1.

[0020] Figure 2 This is a flowchart of an electric boiler system that generates steam using direct electromagnetic heating, as described in Example 2.

[0021] Figure 3 This is a schematic diagram of an electric boiler system that generates steam using direct electromagnetic heating, as shown in Example 2.

[0022] Explanation of reference numerals in the attached drawings: 1. Water pump; 2. Water heater; 3. Phase change heater; 31. Straight pipe; 32. Upper header; 33. Lower header; 4. Steam drum; 5. Steam heater; 6. Superheated steam pipe; 7. Downcomer; 8. Steam and water outlet pipe; 9. Distribution pipe. Detailed Implementation

[0023] The invention described in this application will be explained in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Existing industrial steam production typically involves heating industrial feedwater with coal combustion to gradually obtain high-quality superheated steam. This method results in the generation of flue gas that diffuses into the atmosphere, polluting the environment and proving difficult to control. Therefore, this embodiment employs electric heating to obtain high-quality superheated steam.

[0025] Example 1:

[0026] See Figure 1 This embodiment of an electric boiler system that generates steam using direct electromagnetic heating includes a feedwater pump 1, a water heater 2, a phase change heater 3, and a steam heater 5. The feedwater pump 1, water heater 2, phase change heater 3, and steam heater 5 are sequentially arranged and connected along the direction of water flow. Specifically, the outlet of the feedwater pump 1 is connected to the inlet of the water heater 2, the outlet of the water heater 2 is connected to the inlet of the phase change heater 3, the steam outlet of the phase change heater 3 is connected to the steam inlet of the steam heater 5, and the steam outlet of the steam heater 5 is connected to a hot steam pipe 6. The water heater 2, phase change heater 3, and steam heater 5 are all electromagnetic heaters.

[0027] Water pump 1 delivers demineralized water to water heater 2 for heating. After the demineralized water is heated, it is fed into phase change heater 3. Phase change heater 3 heats the water to a steam state and then feeds the generated steam into steam heater 5 for further heating, thereby obtaining high-quality superheated steam. The superheated steam is delivered to the user through superheated steam pipeline 6.

[0028] As can be seen, this embodiment first heats the demineralized water to increase the temperature of the water entering the phase change heater 3, thereby increasing the phase change rate and producing a large amount of steam. Then, the steam heater 5 further heats the steam to obtain high-quality superheated steam to meet user needs. In other words, superheated steam can be obtained through the synergistic effect of the water heater 2, phase change heater 3, and steam heater 5, using electromagnetic heating. Compared to coal combustion heating, this method is more environmentally friendly.

[0029] Example 2:

[0030] See Figure 2This embodiment of an electric boiler system using electromagnetic direct heating to generate steam further includes a steam drum 4, a downcomer 7, a steam-water outlet pipe 8, and a distribution pipe 9. The feedwater pump 1, water heater 2, steam drum 4, and steam heater 5 are sequentially arranged and connected along the water flow direction. The steam drum 4 and phase change heater 3 are connected via the downcomer 7, steam-water outlet pipe 8, and distribution pipe 9, forming a self-circulating system. Specifically, the outlet of the feedwater pump 1 is connected to the inlet of the water heater 2, the outlet of the water heater 2 is connected to the inlet of the steam drum 4, the outlet of the steam drum 4 is connected to the inlet of the downcomer 7, the outlet of the downcomer 7 is connected to the inlet of the distribution pipe 9, the outlet of the distribution pipe 9 is connected to the inlet of the phase change heater 3, the steam outlet of the phase change heater 3 is connected to the steam inlet of the steam-water outlet pipe 8, and the steam outlet of the steam-water outlet pipe 8 is connected to the steam inlet of the steam drum 4. The steam outlet of the steam drum 4 is connected to the steam inlet of the steam heater 5, and the steam outlet of the steam heater 5 is connected to a hot steam pipe 6.

[0031] Water pump 1 delivers demineralized water to water heater 2 for heating. After the demineralized water is heated, it is introduced into steam drum 4 (steam drum 4 has no heating function). At this time, steam drum 4 contains two phases of matter: steam and water. The water in steam drum 4 has a different temperature than the water heated by phase change heater 3, so the water in the two has a different density. The water entering steam drum 4 has a higher density and forms a density difference with phase change heater 3. Under the action of gravity, the water in steam drum 4 flows downward through downcomer 7 and then enters phase change heater 3 through distribution pipe 9. Phase change heater 3 is heated by electromagnetic heating to heat the water into a steam-water mixture. The resulting steam-water mixture has a lower density and flows upward. It rises through steam-water outlet pipe 8 and flows back into steam drum 4. The steam in steam drum 4 enters steam heater 5 for further heating, thereby obtaining high-quality superheated steam. The superheated steam is delivered to the user through superheated steam pipeline 6.

[0032] In this embodiment, the steam drum 4 is designed to separate the steam and water mixture supplied by the water heater 2, obtaining saturated steam and saturated water. The saturated steam is then led to the steam heater 5 for further heating. This causes the water in the steam drum 4 to flow into the phase change heater 3 due to a density difference, resulting in a phase change. Compared to directly feeding the steam and water produced by the water heater 2 into the phase change heater 3, this avoids the phase change heater 3 reheating the supplied steam, thus preventing energy waste.

[0033] See Figure 3 In this embodiment, the heat exchange tubes of the water heater 2 and the steam heater 5 are serpentine tubes and are arranged horizontally. The heat exchange tubes of the phase change heater 3 are straight pipes 31 and are arranged vertically. The upper and lower ends of the straight pipe 31 are respectively provided with an upper header 32 and a lower header 33. The straight pipe 31 is connected to both the upper header 32 and the lower header 33. The lower header 33 is connected to multiple distribution pipes 9, and the upper header 32 is connected to multiple steam and water outlet pipes 8.

[0034] Both the serpentine tube and the straight tube 31 are metal pipes, serving as both heat exchange elements for electromagnetic heating and pressure-bearing elements for high-pressure working fluids such as water or steam. The electromagnetic heating element directly heats the industrial feedwater or steam inside the metal heat exchange tube, eliminating the need for an intermediate heat exchange medium compared to coal combustion heating methods, thus improving heat exchange efficiency.

[0035] In addition, the straight pipe 31 in the phase change heater 3 is arranged vertically, which can reduce the resistance to the flow of the working fluid and ensure equipment safety compared to the horizontal arrangement.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions created in this application, and are not intended to limit the scope of protection of this application. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions created in this application without departing from the substance and scope of the technical solutions created in this application.

Claims

1. An electric boiler system for producing steam by electromagnetic direct heating, characterized by, It includes a feedwater pump, a water heater, a phase change heater, and a steam heater, which are arranged sequentially and connected along the direction of water flow; the water heater, phase change heater, and steam heater are all electromagnetic heaters; the feedwater pump delivers demineralized water to the water heater for heating, and after the demineralized water is heated, it is fed into the phase change heater for phase change, and the steam generated by the phase change heater is fed into the steam heater for further heating to obtain superheated steam.

2. An electric boiler system for generating steam by electromagnetic direct heating according to claim 1, characterized in that, It also includes a steam drum, a feedwater pump, a water heater, a steam drum, and a steam heater arranged sequentially and connected in the direction of water flow. The steam drum is connected to the phase change heater and forms a self-circulation system.

3. An electric boiler system for generating steam by electromagnetic direct heating according to claim 2, characterized in that, A downcomer, a steam-water outlet pipe, and a distribution pipe are installed between the steam drum and the phase change heater. The outlet of the steam drum is connected to the inlet of the downcomer, the outlet of the downcomer is connected to the inlet of the distribution pipe, the outlet of the distribution pipe is connected to the inlet of the phase change heater, the steam outlet of the phase change heater is connected to the steam inlet of the steam-water outlet pipe, and the steam outlet of the steam-water outlet pipe is connected to the steam inlet of the steam drum.

4. An electric boiler system for generating steam by electromagnetic direct heating according to claim 1, characterized in that, The heat exchange tubes of the water heater's heating surface are serpentine tubes and are arranged horizontally.

5. An electric boiler system for generating steam by electromagnetic direct heating according to claim 1, characterized in that, The heat exchange tubes of the heating surface of the steam heater are serpentine tubes and are arranged horizontally.

6. An electric boiler system for generating steam by electromagnetic direct heating according to claim 4 or 5, characterized in that, The serpentine pipe is a metal pipe.

7. An electric boiler system for generating steam by electromagnetic direct heating according to claim 1, characterized in that, The heat exchange tubes of the phase change heater's heating surface are straight tubes and are arranged vertically. There is an upper header and a lower header at the upper and lower ends of the straight tubes, respectively. The straight tubes are connected to both the upper and lower headers. The lower header is connected to the distribution pipe, and the upper header is connected to the steam and water outlet pipe.

8. An electric boiler system for generating steam using direct electromagnetic heating according to claim 7, characterized in that, Straight pipes are metal pipes.

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