High-temperature steam generating device based on graphite heat storage

Abstract

The utility model discloses a high-temperature steam generating device based on graphite heat storage, which comprises a heat storage device and a steam generating device, the heat storage device comprises a heat storage cylinder, a heat preservation cavity arranged in the heat storage cylinder, a graphite rod arranged in the heat preservation cavity, and a heating piece at least partially arranged in the heat preservation cavity, the steam generating device comprises a water tank arranged above the heat storage barrel, a heat storage steam pocket connected with the water tank and a water supply tank connected with the heat storage steam pocket through a water inlet pipe, and the heat storage steam pocket is connected with the water tank through a first pipe and a second pipe. Wherein the upper end portion of the first pipe is connected with the lower portion of the heat storage steam pocket, the upper end portion of the second pipe is connected with the upper portion of the heat storage steam pocket, and a steam discharge pipe is further arranged on the heat storage steam pocket.

Description

Technical Field

[0001] The utility model relates to the technical field of steam generating devices, in particular to a high-temperature steam generating device based on graphite heat storage. Background Art

[0002] At present, the heat storage devices of power plants mostly use molten salt heat storage. The temperature of molten salt heat storage is between 290℃ and 550℃. This heat storage temperature can meet the production needs of power plants. However, the cement, chemical, and steel industries have higher heat storage temperature requirements, making the existing molten salt heat storage system unable to meet the production needs of these industries. How to use the high-temperature energy storage of heat storage devices to achieve high-temperature steam heating for the cement, chemical, and steel industries is a problem that needs to be solved. Summary of the Invention

[0003] The purpose of the utility model is to overcome the defects in the prior art and provide a novel high-temperature steam generating device based on graphite heat storage.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A high-temperature steam generating device based on graphite heat storage comprises: a heat storage device and a steam generating device, wherein the heat storage device comprises a heat storage cylinder, a heat preservation cavity arranged in the heat storage cylinder, a graphite rod arranged in the heat preservation cavity, and a heating element at least partially arranged in the heat preservation cavity; the steam generating device comprises a water tank arranged above the heat storage cylinder, a heat storage steam drum connected to the water tank, and a water supply tank connected to the heat storage steam drum via a water inlet pipe, the heat storage steam drum and the water tank are connected respectively via a first pipe and a second pipe, wherein the upper end of the first pipe is connected to the lower part of the heat storage steam drum, and the upper end of the second pipe is connected to the upper part of the heat storage steam drum, and the heat storage steam drum is also provided with a steam discharge pipe.

[0006] In some embodiments, the thermal storage drum has a liquid storage portion disposed below and a steam storage portion located above the liquid storage portion, the upper end of the first tube is connected to the liquid storage portion, and the upper end of the second tube is connected to the steam storage portion.

[0007] In some embodiments, the water inlet pipe is connected to the steam storage portion.

[0008] In some embodiments, the high-temperature steam generating device based on graphite heat storage further includes a thermal energy control device disposed between the heat storage device and the steam generating device, and the heat radiation amount of the water tank is controlled by adjusting the opening of the thermal energy control device relative to the heat storage cylinder.

[0009] In some embodiments, the thermal energy control device includes an insert plate slidably disposed between the heat storage device and the steam generating device.

[0010] In some embodiments, the plug boards are two pieces that are arranged opposite to each other, and the two plug boards can be arranged to slide relative to each other or toward each other.

[0011] In some embodiments, the thermal energy control device further includes an electrically controlled valve for controlling the sliding of the plug-in plate.

[0012] In some embodiments, the insulation chamber is a high-alumina refractory brick insulation chamber, and the thermal energy control device is disposed between the high-alumina refractory brick insulation chamber and the water tank.

[0013] In some embodiments, the heating element is a silicon-molybdenum rod heater, and the cold end of the silicon-molybdenum rod heater passes through the insulation cavity and the heat storage cylinder and is electrically connected to an AC power supply.

[0014] In some embodiments, the sink is further provided with a drain pipe.

[0015] Due to the application of the above technical solution, the utility model has the following advantages compared with the existing technology: the high-temperature steam generating device based on graphite heat storage of the utility model utilizes the high-temperature energy storage of graphite to realize high-temperature steam heating for the cement, chemical and steel industries, with a simple structure and convenient operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a high-temperature steam generating device based on graphite heat storage according to the present invention;

[0017] Figure 2 This is a top view of the heat storage device of the present invention;

[0018] The numbers in the figure are:

[0019] 1-heat storage device; 11-heat storage cylinder; 12-insulation chamber; 13-graphite rod; 14-heating element; 2-steam generating device; 21-water tank; 22-heat storage drum; 23-water supply tank; 24-water inlet pipe; 25-first pipe; 26-second pipe; 27-water pump; 28-steam exhaust pipe; 291-wire; 292-AC power supply; 3-thermal energy control device; 31-plug board. DETAILED DESCRIPTION

[0020] The technical solution of the present utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] In the description of this utility model, the directions such as "front", "back", "left", "right", "up", "down" and so on are as follows: Figure 1As shown, the left direction in the figure is "left", the right direction in the figure is "right", the upper direction in the figure is "up", the lower direction in the figure is "down", and the directions perpendicular to the viewing angle in the figure are "front" and "back". The definitions of the above directions are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] like Figure 1-2 As shown, in some embodiments of the present invention, a high-temperature steam generating device based on graphite heat storage includes: a heat storage device 1, a steam generating device 2, and a thermal energy control device 3 arranged between the heat storage device 1 and the steam generating device 2.

[0023] The heat storage device 1 includes a heat storage cylinder 11, a heat preservation chamber 12 arranged in the heat storage cylinder 11, a graphite rod 13 arranged in the heat preservation chamber 12, and a heating element 14 at least partially arranged in the heat preservation chamber 12. The heat preservation chamber 12 is a high-alumina refractory brick heat preservation chamber, and the heating element 14 is a silicon-molybdenum rod heater. The cold end of the silicon-molybdenum rod heater passes through the heat preservation chamber 12 and the heat storage cylinder 11 and is electrically connected to the AC power supply 292. The hot end of the silicon-molybdenum rod heater is located between the inner wall of the heat preservation chamber 12 and the graphite rod 13. Figure 2 As shown, six silicon-molybdenum rod heaters are evenly spaced and arranged at an arc angle on the inner wall of the heat preservation chamber 12. These six silicon-molybdenum rod heaters are connected in series via a wire 291. In other embodiments, the number of silicon-molybdenum rod heaters can be adjusted according to the installation space. In some embodiments, the silicon-molybdenum rod heaters are heated by an alternating current. The 220-volt, 160-ampere AC current causes the hot end temperature of the silicon-molybdenum rod heater to reach 1800°C. Through the conduction of heat radiation from the silicon-molybdenum rod heaters, the graphite rod 13 is heated to 1600°C in a short period of time, achieving the purpose of high-temperature heat storage.

[0024] The steam generating device 2 includes a water tank 21 disposed above the heat storage cylinder 11, a heat storage drum 22 connected to the water tank 21, and a water supply tank 23 connected to the heat storage drum 22 via a water inlet pipe 24. The heat storage drum 22 has a liquid reservoir disposed below and a steam reservoir disposed above the liquid reservoir. The heat storage drum 22 and the water tank 21 are connected via a first pipe 25 and a second pipe 26, respectively. The upper end of the first pipe 25 is connected to the liquid reservoir of the heat storage drum 22, and the lower end of the first pipe 25 is connected to the side wall of the water tank 21. The upper end of the second pipe 26 is connected to the steam reservoir of the heat storage drum 22, and the lower end of the second pipe 26 is connected to the upper wall of the water tank 21. The heat storage drum 22 is also provided with a steam discharge pipe 28. Specifically, the steam discharge pipe 28 is connected to the steam reservoir, and the water inlet pipe 24 is also connected to the steam reservoir. Multiple first and second pipes 25, 26 can be provided as needed. The heat radiated by the graphite rod 13 heats the water in the water tank 21 and vaporizes it into high-temperature steam. The high-temperature steam is then discharged through the steam exhaust pipe 28 and can be used in a variety of scenarios. Compared to the disadvantages caused by directly setting the steam exhaust pipe 28 on the water tank 21, such as the difficulty of separating steam and water, and the danger of rapid vaporization of water if the water tank is not replenished in time, the present invention provides a heat storage steam drum 22, which can play a role in replenishing water and buffering, achieving the effect of steam-liquid separation and improving safety. In some embodiments, the water tank 21 is also provided with a drain pipe (not shown in the figure) for draining the water in the water tank during maintenance.

[0025] The thermal energy control device 3 controls the amount of heat radiation from the water tank 21 by adjusting its opening relative to the heat storage cylinder 11. The thermal energy control device 3 includes a plate 31 that slides between the heat storage device 1 and the steam generator 2. In some embodiments, the thermal energy control device 3 is disposed between the high-alumina refractory brick insulation chamber and the water tank 21. The plates 31 are arranged in a pair, each of which can slide relative to or toward the other. The thermal energy control device 3 also includes an electrically controlled valve for controlling the sliding of the plates. The plates are provided with a high-temperature insulation material. In some embodiments, the high-temperature insulation material is specifically aluminum silicate insulation cotton.

[0026] The working principle of the high-temperature steam generating device based on graphite heat storage of the present invention is described below:

[0027] When the present device is used, the water pump 27 is turned on to inject water into the heat storage bubble 22 through the water inlet pipe 24. Eventually, the heat storage drum 22 forms a liquid storage portion and a steam storage portion. The water tank 21 is filled with water. The silicon-molybdenum rod heater is turned on. After the graphite rod 13 is heated, the water in the water tank 21 is heated and vaporized, enters the heat storage drum 22 through the second pipe 26, and is finally sent out through the steam discharge pipe 28. When the steam volume needs to be controlled, it can be achieved by controlling the coverage of the plug plate 31 below the water tank 21. For example, when the steam volume needs to be reduced, the coverage of the plug plate 31 below the water tank 21 is increased. When the steam volume needs to be increased, the coverage of the plug plate 31 below the water tank 21 is reduced. In some embodiments, automatic water replenishment can be achieved by detecting the height of the liquid storage portion in the heat storage drum 22. For example, when the height of the liquid storage portion is lower than a specific value, the water pump 27 is automatically turned on to replenish water into the heat storage drum 22. When the height of the liquid storage portion reaches the specific value, the water pump 27 is turned off and the water replenishment stops.

[0028] In some embodiments, AC power source 292 is a 220V, 160A AC power source; the heat storage temperature of graphite rod 13 is 600°C-1600°C; the maximum temperature of the hot end of the silicon-molybdenum rod heater is 1800°C; the maximum heat-resistant temperature of the high-alumina refractory brick insulation chamber is 1790°C; and the steam temperature in steam exhaust pipe 28 is 120°C-160°C. Therefore, the high-temperature steam generator based on graphite heat storage of the present invention can achieve high-temperature heat storage and convert the stored heat energy into steam energy.

[0029] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those familiar with the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications based on the spirit of the present invention are intended to be included in the scope of protection of the present invention.

Claims

1. A high-temperature steam generating device based on graphite heat storage, characterized in that: include: A heat storage device and a steam generating device, wherein the heat storage device includes a heat storage cylinder, a heat preservation cavity arranged in the heat storage cylinder, a graphite rod arranged in the heat preservation cavity, and a heating element at least partially arranged in the heat preservation cavity; the steam generating device includes a water tank arranged above the heat storage cylinder, a heat storage steam drum connected to the water tank, and a water supply tank connected to the heat storage steam drum via a water inlet pipe; the heat storage steam drum and the water tank are connected via a first pipe and a second pipe respectively, wherein the upper end of the first pipe is connected to the lower part of the heat storage steam drum, and the upper end of the second pipe is connected to the upper part of the heat storage steam drum; the heat storage steam drum is also provided with a steam discharge pipe.

2. The high-temperature steam generating device based on graphite heat storage according to claim 1, characterized in that: The thermal storage drum has a liquid storage portion provided below and a steam storage portion located above the liquid storage portion. The upper end portion of the first tube is connected to the liquid storage portion, and the upper end portion of the second tube is connected to the steam storage portion.

3. The high-temperature steam generating device based on graphite heat storage according to claim 2, characterized in that: The water inlet pipe is connected to the steam storage part.

4. The high-temperature steam generating device based on graphite heat storage according to claim 1, characterized in that: The high-temperature steam generating device based on graphite heat storage also includes a thermal energy control device arranged between the heat storage device and the steam generating device, and the heat radiation amount of the water tank is controlled by adjusting the opening of the thermal energy control device relative to the heat storage cylinder.

5. The high-temperature steam generating device based on graphite heat storage according to claim 4, characterized in that: The thermal energy control device includes an inserting plate slidably arranged between the heat storage device and the steam generating device.

6. The high-temperature steam generating device based on graphite heat storage according to claim 5, characterized in that: The two plugging plates are arranged opposite to each other, and the two plugging plates can be arranged to slide relative to or towards each other.

7. The high-temperature steam generating device based on graphite heat storage according to claim 5, characterized in that: The thermal energy control device further comprises an electric control valve for controlling the sliding of the plug-in plate.

8. The high-temperature steam generating device based on graphite heat storage according to claim 4, characterized in that: The insulation cavity is a high-aluminum refractory brick insulation cavity, and the thermal energy control device is arranged between the high-aluminum refractory brick insulation cavity and the water tank.

9. The high-temperature steam generating device based on graphite heat storage according to claim 1, characterized in that: The heating element is a silicon-molybdenum rod heater, and the cold end of the silicon-molybdenum rod heater passes through the heat preservation cavity and the heat storage cylinder and is electrically connected to the AC power supply.

10. The high-temperature steam generating device based on graphite heat storage according to claim 1, characterized in that: The water tank is also provided with a drain pipe.

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