Electrically heated steam generator

Abstract

The utility model aims at providing a kind of electric heating steam generator, it includes water storage component and gas storage component, water storage component includes water inlet pipe, at least one primary storage tank and at least one secondary storage tank, the side wall of each primary storage tank is sequentially interconnected, water inlet pipe is communicated with each primary storage tank, each secondary storage tank is located above each primary storage tank, and the side wall of any adjacent two primary storage tanks is communicated with the side wall of secondary storage tank, heating device is arranged in primary storage tank and secondary storage tank, gas storage component includes storage tank, steam outlet pipe and at least one middle connector, one end of middle connector is communicated with the side wall of secondary storage tank, the other end of middle connector is communicated with storage tank along vertical direction upwards, steam outlet pipe is set on the side wall of storage tank away from middle connector.

Description

Technical Field

[0001] This utility model relates to the technical field of steam generating devices, and in particular to an electric steam generator. Background Technology

[0002] An electric heating steam generator is a device that uses electricity to heat water to produce steam. Electric heating steam generators are widely used in industries such as industry, medical care, and food processing.

[0003] Currently, electric heating steam generators generally adopt a horizontal, multi-pipe structure design. For example, Chinese patent document CN110657413A discloses an electric heating steam generator, which includes a steam-water separator, a water supply pipe, and a liquid storage pipe. At least two steam-water separators are provided, and the two steam-water separators are arranged in parallel. Multiple liquid storage pipes are provided, and they are divided into two parallel rows. Each liquid storage pipe is connected to the steam-water separator through a steam guide pipe. At least two water supply pipes are provided, and the two water supply pipes are arranged in parallel. One end of the water supply pipe is provided with a water inlet. The water supply pipe and the liquid storage pipe are connected on one side by a bend. A water supply valve is installed between the water supply pipe and the bend. An electric heating tube is installed inside the liquid storage pipe. The electric heating tube includes a metal sheath tube, and an electric heating wire is installed inside the metal sheath tube. The two ends of the electric heating wire are connected to the conductor posts. Insulators are installed at both ends of the metal sheath tube. A terminal post is installed at one end of the insulator. The conductor post passes through the insulator and connects to the terminal post. Thus, each liquid storage tube has a horizontal, multi-tube structure. After being heated by an electric heating tube, the steam-water mixture is separated in the steam-water separation tube, and the water circulates into the liquid storage tube.

[0004] However, existing horizontal multi-tube structures have the following drawbacks: Firstly, the short heating path results in insufficient water residence time within the tubes, necessitating separation of the water-steam mixture within a separator, leading to low steam conversion efficiency and severely impacting steam quality. Secondly, horizontal multi-tube structures suffer from reheating issues, continuing to apply the same power even after the water temperature reaches saturation, resulting in low thermal energy utilization. Finally, horizontal multi-tube structures occupy a large installation area, restricting their application in space-constrained environments. To address the shortcomings of existing horizontal multi-tube electric heating steam generators, this application proposes an electric heating steam generator. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an electric steam generator with high steam conversion efficiency, high thermal energy utilization rate and compact structure.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] An electric steam generator, comprising:

[0008] A water storage assembly includes an inlet pipe, at least one primary storage tank, and at least one secondary storage tank. The sidewalls of the primary storage tanks are sequentially interconnected. The inlet pipe is connected to each of the primary storage tanks. Each secondary storage tank is located above each of the primary storage tanks, and the sidewalls of any two adjacent primary storage tanks are connected to the sidewall of a secondary storage tank. A heater is installed inside each of the primary and secondary storage tanks.

[0009] A gas storage assembly includes a gas storage tank, a steam outlet pipe, and at least one intermediate pipe. One end of the intermediate pipe is connected to the side wall of the secondary storage tank, and the other end of the intermediate pipe extends vertically upward to connect with the gas storage tank. The steam outlet pipe is located on the side wall of the gas storage tank away from the intermediate pipe.

[0010] Optionally, a plurality of first connecting pipes are provided between any two adjacent primary storage tanks for connection, and the water inlet pipe is connected to one of the first connecting pipes.

[0011] Optionally, a plurality of second connecting pipes are provided between the primary storage tank and the secondary storage tank for communication.

[0012] Optionally, a lower water level pipe is provided on the second connecting pipe, and an upper water level pipe is provided on one of the intermediate connecting pipes. The lower water level pipe and the upper water level pipe are used to connect to a water level detector.

[0013] Optionally, the gas storage tank is also provided with several detection tubes spaced apart.

[0014] Optionally, the water storage assembly further includes a drain pipe that is connected to the bottom side of each of the primary storage tanks.

[0015] Optionally, a support base is also provided on the bottom side of the primary storage tank.

[0016] Optionally, two support bases are provided, with the two support bases located at opposite ends of the primary storage tank.

[0017] Optionally, a flange is provided at both ends of the primary storage tank and at both ends of the secondary storage tank.

[0018] Compared with the prior art, the present invention has at least the following advantages:

[0019] The electric steam generator of this utility model includes a water storage component and a gas storage component. The water storage component includes a water inlet pipe, at least one primary storage tank and at least one secondary storage tank. The side walls of each primary storage tank are sequentially connected to each other. The water inlet pipe is connected to each primary storage tank. Each secondary storage tank is located above each primary storage tank, and the side walls of any two adjacent primary storage tanks are connected to the side wall of the secondary storage tank. A heater is installed in both the primary and secondary storage tanks. The gas storage component includes a steam storage tank, a steam outlet pipe and at least one intermediate pipe. One end of the intermediate pipe is connected to the side wall of the secondary storage tank, and the other end of the intermediate pipe extends vertically upward to connect to the steam storage tank. The steam outlet pipe is located on the side wall of the steam storage tank away from the intermediate pipe. Thus, by combining horizontal and vertical structures, water can be heated in two stages: primary heating occurs in the primary tank, and secondary heating occurs in the secondary tank, forming a staged heating process. Compared to the constant power saturated heating used in single-stage structures, the staged structure of this application uses unsaturated heating in the primary tank, meaning that electrical energy can be fully converted into the thermal energy of the water. After preheating, the water enters the secondary tank for secondary heating to fully convert it into steam, extending the heating path and improving steam conversion efficiency and thermal energy utilization. Moreover, the combination of horizontal and vertical structures makes the overall structure more compact, thereby reducing the floor space required. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of an electric steam generator according to one embodiment of the present invention;

[0022] Figure 2 for Figure 1 The diagram shows a cross-sectional view of the electric steam generator.

[0023] Figure 3 for Figure 1 The image shows a side view of an electric steam generator.

[0024] Explanation of reference numerals in the attached figures:

[0025] 10. Electric steam generator; 100. Water storage assembly; 200. Gas storage assembly; 110. Water inlet pipe; 120. Primary storage tank; 130. Secondary storage tank; 210. Steam storage tank; 220. Steam outlet pipe; 230. Intermediate pipe; 140. First connecting pipe; 150. Second connecting pipe; 161. Lower water level pipe; 162. Upper water level pipe; 240. Detection pipe; 170. Sewage pipe; 180. Support base; 190. Flange. Detailed Implementation

[0026] To facilitate understanding of this utility model, a more comprehensive description will be provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model.

[0027] like Figure 1 and Figure 2 As shown, an electric steam generator 10 includes a water storage assembly 100 and a steam storage assembly 200. The water storage assembly 100 includes a water inlet pipe 110, at least one primary storage tank 120, and at least one secondary storage tank 130. The side walls of each primary storage tank 120 are sequentially interconnected. The water inlet pipe 110 is connected to each primary storage tank 120. Each secondary storage tank 130 is located above each primary storage tank 120, and the side walls of any two adjacent primary storage tanks 120 are... The primary storage tank 120 and the secondary storage tank 130 are both equipped with heaters connected to the side wall of the secondary storage tank 130. The gas storage assembly 200 includes a steam storage tank 210, a steam outlet pipe 220 and at least one intermediate pipe 230. One end of the intermediate pipe 230 is connected to the side wall of the secondary storage tank 130, and the other end of the intermediate pipe 230 extends vertically upward to connect with the steam storage tank 210. The steam outlet pipe 220 is located on the side wall of the steam storage tank 210 away from the intermediate pipe 230.

[0028] It should be noted that the primary storage tanks 120 are arranged horizontally in parallel, and the primary storage tanks 120 are interconnected to achieve isobaric communication, ensuring uniform water flow distribution. The secondary storage tank 130 is installed above the primary storage tanks 120, and each adjacent primary storage tank 120 is connected to one secondary storage tank 130, forming a stepped heat exchange channel. The number of primary storage tanks 120 and secondary storage tanks 130 can be set arbitrarily according to actual needs, for example, 2, 3, or 4, etc. For ease of description, this application uses an example with 2 primary storage tanks 120 and 1 secondary storage tank 130. Furthermore, both the primary storage tanks 120 and the secondary storage tanks 130 are equipped with heaters. The inlet pipe 110 is connected to each primary storage tank 120, the intermediate pipe 230 is connected to both the secondary storage tank 130 and the steam storage tank 210, and the steam outlet pipe 220 is installed on top of the steam storage tank 210. Water is then poured into the primary storage tanks 120 and secondary storage tanks 130 through the inlet pipe 110. The water level covers the surface of the heater installed in the secondary storage tank 130, while the primary storage tank 120 is completely filled with water. The heater in the primary storage tank 120 then performs primary heating of the water, rapidly raising its temperature to 90℃~95℃. The preheated water enters the secondary storage tank 130 for secondary heating, generating a large amount of steam. The steam flows through the central pipe 230 into the steam storage tank 210 and then out through the steam outlet pipe 220. Thus, by combining horizontal and vertical structures, water can be heated in two stages: primary heating occurs in the primary storage tank 120, and secondary heating occurs in the secondary storage tank 130, forming a staged heating system. Compared to the constant power saturated heating used in single-stage structures, in the staged structure of this application, the primary storage tank 120 is unsaturated, meaning that electrical energy can be fully converted into the thermal energy of the water. After preheating, the water enters the secondary storage tank 130 for secondary heating to fully convert it into steam, extending the heating path, improving steam conversion efficiency and thermal energy utilization. Moreover, the combination of horizontal and vertical structures makes the overall structure more compact, thereby reducing the floor space required.

[0029] like Figures 1 to 3 As shown, in one embodiment, a plurality of first connecting pipes 140 are provided between any two adjacent primary storage tanks 120 for communication, and the water inlet pipe 110 is connected to one of the first connecting pipes 140.

[0030] It should be noted that both ends of each first connecting pipe 140 are welded and fixed to two adjacent primary storage tanks 120, and there is a gap between each first connecting pipe 140. The water inlet pipe 110 is welded and fixed to one of the first connecting pipes 140. Water can be injected into the primary storage tank 120 simultaneously through the water inlet pipe 110.

[0031] like Figures 1 to 3As shown, in one embodiment, a plurality of second connecting pipes 150 are provided between the primary storage tank 120 and the secondary storage tank 130 for communication.

[0032] It should be noted that the two ends of the second connecting pipe 150 are welded and fixed to the primary storage tank 120 and the secondary storage tank 130, respectively, and there is a gap between each second connecting pipe 150. In this way, after the water undergoes primary heating in the primary storage tank 120, it enters the secondary storage tank 130 through each second connecting pipe 150 for secondary heating. The second connecting pipe 150 increases the water flow path, thereby improving the steam conversion efficiency.

[0033] like Figure 1 As shown, in one embodiment, a lower water level pipe 161 is provided on the second connecting pipe 150, and an upper water level pipe 162 is provided on one of the intermediate connecting pipes 230. The lower water level pipe 161 and the upper water level pipe 162 are used to connect to the water level detector.

[0034] It should be noted that, in order to accurately control the water level and ensure that the electric steam generator 10 is in optimal working condition, a lower water level pipe 161 and an upper water level pipe 162 are installed on the second connecting pipe 150 and one of the intermediate connecting pipes 230, respectively. The upper water level pipe 162 and the lower water level pipe 161 are connected to a water level detector. When the water level detector detects that the water level is too low (for example, when the water level is lower than the highest fire boundary of the secondary storage tank 120 or the set minimum water level), the water level detector will send a low water level signal to the control system (for example, a PLC control system). When the water level is higher than the connection point between the intermediate connecting pipe 230 and the upper water level pipe 162 or the set maximum water level, the water level detector will send a high water level signal to the control system (for example, a PLC control system). In this way, the water level in the equipment is accurately controlled.

[0035] like Figure 1 As shown, in one embodiment, the gas storage tank 210 is also provided with a plurality of spaced detection tubes 240.

[0036] It should be noted that, in order to ensure the safe use of the electric steam generator 10, several detection tubes 240 are welded and fixed on the steam storage tank 210. In this way, safety valve structures such as explosion-proof valves, pressure valves, temperature valves, and pressure relief valves can be installed on the detection tubes 240.

[0037] like Figure 1 As shown, in one embodiment, the water storage assembly 100 further includes a drain pipe 170, which is connected to the bottom side of each primary storage tank 120.

[0038] It should be noted that after the electric steam generator 10 has been used for a period of time, it needs to be cleaned inside. In order to facilitate the discharge of the generated wastewater, a drain pipe 170 is welded and installed on the bottom side of each primary storage tank 120 so that the wastewater can be discharged quickly through the drain pipe 170.

[0039] like Figure 1 As shown, in one embodiment, a support base 180 is also provided on the bottom side of the primary storage tank 120. Further, in one embodiment, two support bases 180 are provided, with the two support bases 180 located at opposite ends of the primary storage tank 120. Thus, the support base 180 serves as a support structure for the electric steam generator 10, ensuring the stable operation of the electric steam generator 10.

[0040] like Figure 1 As shown, in one embodiment, a flange 190 is provided on both ends of the primary storage tank 120 and both ends of the secondary storage tank 130.

[0041] It should be noted that both ends of the primary storage tank 120 and the secondary storage tank 130 are open, with flange 190 being the open end. This allows the heater to be fixedly mounted on flange 190, ensuring stable heating of the water in the primary and secondary storage tanks 120 and 130. Furthermore, in one embodiment, flange plates are provided at the ends of the structures such as the inlet pipe 110, steam outlet pipe 220, lower water level pipe 161, upper water level pipe 162, and drain pipe 170 that connect to external devices. The structure of these flange plates is identical to that of flange 190, facilitating stable connection and installation between these structures and external devices.

[0042] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the utility model patent. Unless otherwise specifically defined, the installation / fixing / setting mentioned in this utility model can be understood to include, but is not limited to, locking and fixing with screws / bolts, and welding. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An electrically heated steam generator, characterised in that, include: A water storage assembly includes an inlet pipe, at least one primary storage tank, and at least one secondary storage tank. The sidewalls of the primary storage tanks are sequentially interconnected. The inlet pipe is connected to each of the primary storage tanks. Each secondary storage tank is located above each of the primary storage tanks, and the sidewalls of any two adjacent primary storage tanks are connected to the sidewall of a secondary storage tank. A heater is installed inside each of the primary and secondary storage tanks. A gas storage assembly includes a gas storage tank, a steam outlet pipe, and at least one intermediate pipe. One end of the intermediate pipe is connected to the side wall of the secondary storage tank, and the other end of the intermediate pipe extends vertically upward to connect with the gas storage tank. The steam outlet pipe is located on the side wall of the gas storage tank away from the intermediate pipe.

2. The electric steam generator according to claim 1, characterized in that, A plurality of first connecting pipes are provided between any two adjacent primary storage tanks for connection, and the water inlet pipe is connected to one of the first connecting pipes.

3. The electric steam generator according to claim 1 or 2, characterized in that, Several second connecting pipes are provided between the primary storage tank and the secondary storage tank for connection.

4. The electric steam generator according to claim 3, characterized in that, The second connecting pipe is provided with a lower water level pipe, and one of the middle connecting pipes is provided with an upper water level pipe. The lower water level pipe and the upper water level pipe are used to connect to the water level detector.

5. The electric steam generator according to claim 1, characterized in that, The gas storage tank is also equipped with several spaced-apart detection tubes.

6. The electric steam generator according to claim 1, characterized in that, The water storage assembly also includes a drain pipe, which is connected to the bottom side of each of the primary storage tanks.

7. The electric steam generator according to claim 1, characterized in that, The bottom side of the primary storage tank is also provided with a support base.

8. The electric steam generator according to claim 7, characterized in that, There are two support bases, which are located at opposite ends of the primary storage tank.

9. The electric steam generator according to claim 1, characterized in that, A flange is provided at both ends of the primary storage tank and at both ends of the secondary storage tank.

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