CN102162636B - A high-temperature heat storage and evaporation integrated device - Google Patents

Abstract

A high-temperature heat storage and evaporation integrated device, comprising a heat storage block (5), a liquid storage tank (7), an insulation layer (4), a heating pipe (8), and an evaporation pipe (9). The thermal insulation layer (4) is close to the outer wall of the liquid storage tank (7); the heat storage block (5) is placed inside the liquid storage tank (7); the heat storage block (5) has a plurality of through holes regularly distributed at equal intervals; the heating tube (8) pass through the through hole on the heat storage block (5) at intervals with the evaporation tube (9). The heating tube (8) and the evaporating tube (9) are bare tubes or enhanced heat exchange tubes; the container of the liquid storage tank (7) is filled with a high-temperature heat-transfer working medium.

Description

A high-temperature heat storage and evaporation integrated device

technical field

The invention relates to a heat storage and evaporation integrated device.

Background technique

Since a continuous and stable power supply can be achieved through heat storage, concentrating solar thermal power generation is recognized by countries all over the world as a renewable energy power generation technology with great potential. The heat storage method as well as the performance and cost of heat storage materials are of great importance to the construction and operation costs of solar thermal power plants. Heat storage materials used in solar thermal power generation systems need to have the following characteristics: high energy storage density; heat storage materials and heat exchange liquids should have good heat exchange performance; heat storage materials should have good stability; heat storage materials There should be good chemical compatibility with the system equipment; the heat storage and release cycle should be reversible; high cost performance. The current heat storage methods mainly include latent heat storage, sensible heat storage and chemical energy storage. Latent heat refers to the heat absorbed or released by a substance during the phase transition process from one phase to another under the condition that the temperature remains constant. The storage of heat energy is realized by the latent heat absorbed or released during the mutual transformation between them. This process is reversible and can be repeated multiple times in both directions. This technology is currently researched and widely used. Commonly used latent heat storage materials include water, various hydrated salts, and mixed salts. The heat storage is huge, but the heat storage temperature is limited by the type and physical properties of the heat storage material. Sensible heat is when this heat is added or removed which results in a change in the temperature of a substance without a phase change. Sensible heat storage is the simplest and most mature technology. Commonly used sensible heat storage materials include water, molten salt, heat transfer oil, concrete, and pebbles. The amount of material required for heat storage is relatively large. Chemical energy is the energy released when an object undergoes a chemical reaction. Chemical energy storage has a higher heat flux density than both sensible heat and latent heat storage. However, the technology is complicated and there is no industrial application at present. The types and characteristics of heat storage systems that have been applied in solar thermal power plants or reported in literature patents are as follows: (1) The double-tank heat storage system of "high temperature salt tank + low temperature salt tank". Document 1 (Ulf Hermann, Bruce Kelly, Henry Price. Two-tank molten salt storage for parabolic trough solar power plants, Energy, 2004, (29): 883-893) reported the application of molten salt double-tank heat storage system in trough solar thermal Applications in power stations. Molten salt is used as an integrated working medium for heat transfer and heat storage. Molten salt is highly corrosive, but compared with heat transfer oil, molten salt heat storage has the advantage of low cost. Moreover, depending on the type of molten salt, the working temperature range of the heat storage system can be 200°C-560°C, and the upper limit of the working temperature is higher, which is conducive to improving the working parameters of the steam generator set, thereby achieving higher power generation efficiency, but this scheme Two molten salt heat storage tanks need to be manufactured, and the amount of molten salt used is also large. (2) Thermocline molten salt single-tank heat storage system. Document 2 (Robert J. Copeland, Lakewood, Colo., US patent (No. 4523629)) reported a thermocline single-tank heat storage device using molten salt liquid phase sensible heat storage, which is characterized in that the molten salt Baffles are installed in the tank to inhibit the mixing of cold salt and hot salt in the molten salt tank and promote temperature stratification in the upper and lower sections of the molten salt tank. Document 3 (Zuo Yuanzhi, Yang Xiaoxi, Ding Wei, Ding Jing, Yang Jianping, Chinese Invention Patent (ZL200710028077.X)) reported a high-temperature thermocline hybrid heat storage device in molten salt, which was installed in the molten salt tank. Materials rely on sensible heat transfer and phase transformation heat storage for heat storage. Compared with the double-tank heat storage system and the molten salt single-tank heat storage system, the cost of heat storage can be further reduced. (3) "Sandstone + heat transfer oil" single-tank heat storage system. Document 4 (M.Castro, J.L.Presa, J.Díaz, J.Peire, A.F.Baker, S.E.Faas, L.G.Radosevich, A.C.Skinrood.C.R.S. receiver and storage systems evaluation (J), Solar Energy, 1991, 47(3): 197-207) reported the structural characteristics of the "sandstone + heat transfer oil" single-tank heat storage system, but there are still problems to be solved in terms of heat transfer, heat transfer oil pollution, and difficult start-up at low temperature. (4) Concrete heat storage module. Document 6 (Ulf Herrmann, David Wearney. Survey of thermal energy storage for parabolic trough power plants (J), Journal of solar energy engineering, 2002, 124: 145-152) compares and analyzes the power generation costs of several heat storage materials, and draws Concrete heat storage modules have the best cost performance. Chinese patent ZL200610112004.4 proposes a high-temperature heat storage and heat storage method using concrete, and uses gravity heat pipes to solve corrosion and freezing problems. However, the expansion rate of metal pipes and concrete is different, and thermal expansion and contraction will cause cracks in the concrete structure. The contact thermal resistance between the metal pipe and the concrete is also relatively large. In addition, the heat storage methods reported in the above literatures have the problems of high cost and inability to start at low temperature. In addition, when the above-mentioned device is applied in a solar thermal power generation system, an evaporator is required to provide the steam required for the operation of the turbo-generator set. Both heat storage and steam generation methods cannot further significantly reduce costs and improve system efficiency and stability.

Contents of the invention

The purpose of the present invention is to provide a high-temperature heat storage and evaporation integrated device applicable to solar thermal power generation systems, which has the characteristics of simple structure, safety and reliability, high heat exchange efficiency and easy low-temperature start-up.

The high-temperature heat storage and evaporation integrated device of the present invention is composed of heat storage block, liquid storage tank, insulation layer, heating tube, evaporation tube and other components. The insulation layer is close to the outer wall of the liquid storage tank; the heat storage block is placed inside the liquid storage tank; there are a number of horizontally arranged through holes regularly distributed on the heat storage block; the heating tubes and evaporation tubes are arranged alternately, passing through the heat storage block alternately There are through holes arranged horizontally on the top, and the distance between each heating tube and the adjacent evaporating tube is similar or equal. The heating tube and the evaporating tube can be plain tubes, corrugated tubes, variable cross-section elliptical tubes, threaded tubes, and enhanced heat exchange tubes with fins added. The interior of the liquid storage tank container is filled with high-temperature heat transfer working fluid.

When the heat storage temperature of the high-temperature heat storage and evaporation integrated device of the present invention is within 400°C, the high-temperature heat transfer medium filled in the liquid storage tank is heat transfer oil. The tank is a pressure-bearing structure, and the heat transfer fluid flowing in the heating tube is heat transfer oil or molten salt. When the heat storage temperature of the high-temperature heat storage and evaporation integrated device of the present invention is within 600°C, the high-temperature heat transfer working fluid filled in the liquid storage tank is mixed molten salt, and the liquid storage tank is a non-pressure-bearing structure at this time. The heat transfer medium flowing in the heating tube is mixed molten salt; the heat transfer medium flowing in the evaporator tube is water vapor; the material of the heat storage block is pebbles, ceramics or concrete, and the material of the heat storage block is the same as the high temperature heat transfer fluid filled in the liquid storage tank. The thermal working medium has good compatibility; there is a gap reserved between the regularly distributed through holes on the heat storage block and the heating tube and evaporation tube, which is convenient for on-site installation and can also ensure that the thermal expansion of the heat storage block, heating tube and evaporation tube When shrinking, they do not interfere with each other and cause structural damage.

When the high-temperature heat storage and evaporation integrated device is charging, the high-temperature heat transfer fluid enters the heating pipe from the inlet of the heating pipe, and flows out from the outlet of the heating pipe after fully exchanging heat with the high-temperature heat transfer working fluid and heat storage block filled in the liquid storage tank. The heat is stored in the heat storage block and the high-temperature heat transfer fluid inside the liquid storage tank.

When the high-temperature heat storage and evaporation integrated device releases heat, saturated water or low-temperature steam enters the evaporator tube from the inlet of the evaporator tube, and after fully exchanging heat with the high-temperature heat transfer medium and heat storage block filled in the liquid storage tank, it is heated into high-temperature steam , flowing out from the outlet of the evaporating tube.

When the high-temperature heat storage and evaporation integrated device is in the first test run, or it is shut down for a long time due to equipment maintenance and other reasons, when the temperature of the heat storage block is low, if the heat transfer medium flowing in the heating tube is heat transfer oil, due to solar The DOWTHEM-A heat transfer oil commonly used in thermal power stations will solidify below 12°C, so hot water below 100°C or low-temperature steam above 100°C enters the evaporator tube from the inlet of the evaporator tube, and heats the high-temperature heat transfer tool filled in the liquid storage tank. quality, and then heat the heat storage block and the heating tube inserted into it, and flow out from the outlet of the evaporating tube after heat exchange. The solidified heat transfer oil in the heating tube is heated to a liquid state and can flow and circulate. When the high-temperature heat storage and evaporation integrated device is applied to a molten salt solar thermal power station, the heat transfer medium in the heating tube of the high-temperature heat storage and evaporation integrated device is molten salt, and the mixed nitric acid molten salt commonly used in solar thermal power stations is heated at 220°C The following is solid state, so the high-temperature steam above 290°C enters the evaporator tube from the inlet of the evaporator tube, heats the high-temperature heat transfer fluid, heat storage block and heating tube filled in the liquid storage tank, and flows out from the outlet of the evaporator tube after heat exchange. The molten salt solidified in the heating tube is heated and melted into a liquid state, and the flow cycle begins.

The advantage of the present invention is that pebbles, high-temperature-resistant ceramics, and high-temperature-resistant and corrosion-resistant concrete are used as heat storage block materials, which can be mixed with sealed phase-change materials to make full use of the above-mentioned materials with large heat storage capacity, low cost and high-temperature heat. Stable performance; place the heat storage block in the liquid storage tank, and make full use of the high-temperature heat transfer medium in the liquid storage tank to fill the reserved gap between the heating tube, evaporation tube and the through hole of the heat storage block. On the one hand, the high-temperature heat transfer working medium can be used to reduce the contact thermal resistance between the heat exchange tube and the heat storage block, and enhance the heat exchange; Incoming structural damage. Therefore, the high-temperature heat storage and evaporation integrated device has better heat transfer characteristics and reliability, and is superior to previous solid heat storage devices. In addition, the heating tube and evaporation tube of the high-temperature heat storage and evaporation integrated device of the present invention are placed in the heat storage block. When the high-temperature heat storage and evaporation integrated device is started at a low temperature, hot water or steam can be used to preheat the storage The thermal block solves the freezing blockage of high-temperature heat transfer fluid at low temperature, and this function is also superior to previous solid heat storage devices. In addition, the high-temperature heat storage and evaporation integrated device of the present invention has a compact structure, and can also be flexibly combined and used by changing the series connection and parallel connection according to the requirements of heat storage temperature and steam outlet parameters, so that the heat energy in the heat storage block can be used according to the temperature gradient Take advantage of. Due to the above characteristics, the high-temperature heat storage and evaporation integrated device of the present invention has higher heat exchange efficiency, better economy and operation reliability than previous heat storage devices, and is especially suitable for heat storage and evaporation above 400°C solar thermal power generation occasions.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Figure 1 is a three-dimensional view of the cuboid structure of the high-temperature heat storage and evaporation integrated device;

Figure 2 is a three-dimensional view of the cylindrical structure of the high-temperature heat storage and evaporation integrated device;

Figure 3 is the top view of the high-temperature heat storage and evaporation integrated device;

Figure 4 is a front sectional view of a high-temperature heat storage and evaporation integrated device;

Fig. 5 Left sectional view of cuboid structure of high-temperature heat storage and evaporation integrated device;

Fig. 6 The left cross-sectional view of the cylinder structure of the high-temperature heat storage and evaporation integrated device;

Fig. 7 is a schematic diagram of the connection mode between the cuboid heat storage block and the heat exchange tube of the high-temperature heat storage and evaporation integrated device;

Figure 8 is a schematic diagram of the connection method between the cylindrical heat storage block and the heat exchange tube of the high-temperature heat storage and evaporation integrated device;

Fig. 9 is a schematic diagram of a heating tube of a high-temperature heat storage and evaporation integrated device;

Figure 10 is a schematic diagram of the evaporation tube of the high-temperature heat storage and evaporation integrated device;

Fig. 11 is a schematic diagram of a cuboid heat storage block of a high-temperature heat storage and evaporation integrated device;

Figure 12 is a schematic diagram of a cylindrical heat storage block of a high-temperature heat storage and evaporation integrated device;

Figure 13 Application schematic diagram of the composition system of the high-temperature heat storage and evaporation integrated device;

In the figure: 1 heating tube inlet, 2 evaporating tube inlet, 3 evaporating tube outlet, 4 insulation layer, 5 heat storage block, 6 heating tube outlet, 7 liquid storage tank, 8 heating tube, 9 evaporating tube, 10 valve A, 11 Valve B, 12 Valve C, 13 Valve D, 14 Valve E, 15 Valve F, 16 Valve G, 17 Valve H, 18 Valve I, 19 Valve J, 20 Valve K, 21 Valve L, 22 Valve M, 23 Valve N , 24 valve O, 25 valve P, 26 high temperature heat storage and evaporation integrated device Q, 27 high temperature heat storage and evaporation integrated device R, 28 high temperature heat storage and evaporation integrated device S.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1, the high-temperature heat storage and evaporation integrated device has a rectangular parallelepiped structure. The outermost side of the high-temperature heat storage and evaporation integrated device is the insulation layer 4 . The inlet 1 of the heating pipe, the outlet 6 of the heating pipe, the inlet 2 of the evaporating pipe, and the outlet 3 of the evaporating pipe extend out of the liquid storage tank 7 and the outer side of the insulation layer 4 . When the high-temperature heat storage and evaporation integrated device is used for the first time, or when it is started after a long-term shutdown due to maintenance and other reasons, hot water or low-temperature steam flows in from the inlet 2 of the evaporation tube and flows out from the outlet 3 of the evaporation tube, completing the integration of high-temperature heat storage and evaporation Preheating of the device. When the high-temperature heat storage and evaporation integrated device is charged, the high-temperature heat transfer working medium flows in from the heating tube inlet 1 and flows out from the heating tube outlet 6, completing the heat storage process. When evaporating and releasing heat, hot water or low-temperature steam flows in from the inlet 2 of the evaporating tube, and after heat exchange, the heated high-temperature steam flows out from the outlet 3 of the evaporating tube.

As shown in Figure 2, the high-temperature heat storage and evaporation integrated device has a cylindrical structure in shape. The outermost side of the high-temperature heat storage and evaporation integrated device is the insulation layer 4 . The inlet 1 of the heating pipe, the outlet 6 of the heating pipe, the inlet 2 of the evaporating pipe, and the outlet 3 of the evaporating pipe extend out of the liquid storage tank 7 and the outer side of the insulation layer 4 . When the high-temperature heat storage and evaporation integrated device is used for the first time, or when it is started after a long-term shutdown due to maintenance and other reasons, hot water or low-temperature steam flows in from the inlet 2 of the evaporation tube and flows out from the outlet 3 of the evaporation tube, completing the integration of high-temperature heat storage and evaporation Preheating of the device. When the high-temperature heat storage and evaporation integrated device is charged, the high-temperature heat transfer working medium flows in from the heating tube inlet 1 and flows out from the heating tube outlet 6, completing the heat storage process. When evaporating and releasing heat, hot water or low-temperature steam flows in from the inlet 2 of the evaporating tube, and after heat exchange, the heated high-temperature steam flows out from the outlet 3 of the evaporating tube.

As shown in FIGS. 3 and 4 , the high-temperature heat storage and evaporation integrated device is composed of a heat storage block 5 , a liquid storage tank 7 , an insulation layer 4 , a heating pipe 8 , and an evaporation pipe 9 . The inlet 1 of the heating pipe, the outlet 6 of the heating pipe, the inlet 2 of the evaporating pipe, and the outlet 3 of the evaporating pipe extend out of the liquid storage tank 7 and the outer side of the insulation layer 4 . The material of the liquid storage tank 7 can be metal or non-metal. The insulation layer 4 is close to the outer wall of the liquid storage tank 7; the heat storage block 5 is placed inside the liquid storage tank 7; the heat storage block 5 is regularly and equidistantly distributed with a plurality of horizontal through holes; the heating tube 8 and the evaporation tube 9 are alternated Arranged to alternately pass through the horizontally arranged through holes on the heat storage block 5, and the distance between each heating tube and the adjacent evaporating tube is similar or equal. The heating tube 8 and the evaporating tube 9 can be plain tubes, corrugated tubes, variable cross-section elliptical tubes, threaded tubes, enhanced heat exchange tubes with fins added. The container of the liquid storage tank 7 is filled with a high-temperature heat transfer working fluid. When the high-temperature heat storage and evaporation integrated device is used for the first time, or when it is started after a long-term shutdown due to maintenance and other reasons, hot water or low-temperature steam flows in from the inlet 2 of the evaporation tube and flows out from the outlet 3 of the evaporation tube, completing the integration of high-temperature heat storage and evaporation Preheating of the device. When the high-temperature heat storage and evaporation integrated device is charged, the high-temperature heat transfer working medium flows in from the heating tube inlet 1, flows out from the heating tube outlet 6, and fully exchanges with the high-temperature heat transfer working medium in the liquid storage tank 7 and the heat storage block 5 heat to complete the heat storage process. When evaporating heat release, hot water or low-temperature steam flows in from the inlet 2 of the evaporation tube, and after sufficient heat exchange with the high-temperature heat transfer medium in the liquid storage tank 7 and the heat storage block 5, the hot water or low-temperature steam is heated into high-temperature steam It flows out from outlet 3 of the evaporating tube.

As shown in Figure 5, the cross-sectional shape of the high-temperature heat storage and evaporation integrated device with a cuboid structure is rectangular, and the insulation layer 4 is close to the outer wall of the liquid storage tank 7; the heat storage block 5 is placed inside the liquid storage tank 7; the heat storage block There are a plurality of horizontal through-holes regularly and equidistantly distributed on the 5; the heating tubes 8 and the evaporating tubes 9 are arranged alternately, passing through the through-holes arranged horizontally on the heat storage block 5 alternately, and between each heating tube and the adjacent evaporating tubes The distance between them is similar or equal. The heating tube 8 and the evaporating tube 9 can be plain tubes, corrugated tubes, variable cross-section elliptical tubes, threaded tubes, enhanced heat exchange tubes with fins added. The container of the liquid storage tank 7 is filled with a high-temperature heat transfer working fluid.

As shown in Figure 6, the cross-sectional shape of the high-temperature heat storage and evaporation integrated device with a cylindrical structure is circular, and the insulation layer 4 is close to the outer wall of the liquid storage tank 7; the heat storage block 5 is placed inside the liquid storage tank 7; A plurality of horizontally arranged through-holes are regularly and equidistantly distributed on the thermal block 5; heating tubes 8 and evaporating tubes 9 are arranged alternately, and alternately pass through the horizontally arranged through-holes on the heat storage block 5, and each heating tube is connected to the adjacent The distance between the evaporation tubes is similar or equal. The heating tube 8 and the evaporating tube 9 can be plain tubes, corrugated tubes, variable cross-section elliptical tubes, threaded tubes, enhanced heat exchange tubes with fins added. The container of the liquid storage tank 7 is filled with a high-temperature heat transfer working fluid.

As shown in FIG. 7 , the integrated high-temperature heat storage and evaporation device with a rectangular parallelepiped structure contains a plurality of heat storage blocks 5 , and the heat storage blocks 5 have a rectangular parallelepiped structure. A plurality of horizontally arranged through holes are regularly and equidistantly distributed on the heat storage block 5 . The heating tubes 8 and the evaporating tubes 9 are arranged alternately, passing through the horizontally arranged through holes on the heat storage block 5 alternately, and the distance between each heating tube and the adjacent evaporating tubes is similar or equal. The heating tube 8 and the evaporating tube 9 can be plain tubes, corrugated tubes, variable cross-section elliptical tubes, threaded tubes, enhanced heat exchange tubes with fins added. The material of the heat storage block 5 can be pebbles, high-temperature-resistant ceramics, high-temperature-resistant and corrosion-resistant concrete, and a sealed phase-change material can be mixed in the heat storage block 5 .

As shown in FIG. 8 , the high-temperature heat storage and evaporation integrated device with a cylindrical structure contains a plurality of heat storage blocks 5 , and the heat storage blocks 5 have a cylindrical structure. A plurality of horizontally arranged through holes are regularly and equidistantly distributed on the heat storage block 5 . The heating tubes 8 and the evaporating tubes 9 are arranged alternately, passing through the horizontally arranged through holes on the heat storage block 5 alternately, and the distance between each heating tube and the adjacent evaporating tubes is similar or equal. The heating tube 8 and the evaporating tube 9 can be plain tubes, corrugated tubes, variable cross-section elliptical tubes, threaded tubes, enhanced heat exchange tubes with fins added. The material of the heat storage block 5 can be pebbles, high-temperature-resistant ceramics, high-temperature-resistant and corrosion-resistant concrete, and phase-change materials can be mixed into the heat storage block 5 .

As shown in Figure 9, the heating tube 8 inside the high-temperature heat storage and evaporation integrated device can be a bare tube, or a bellows tube, a variable cross-section elliptical tube, a threaded tube, or an enhanced heat exchange tube with fins.

As shown in Figure 10, the evaporation tube 9 inside the high-temperature heat storage and evaporation integrated device can be a plain tube, or a bellows tube, a variable cross-section elliptical tube, a threaded tube, or an enhanced heat exchange tube with fins.

As shown in FIG. 11 , the heat storage block 5 inside the cuboid high-temperature heat storage and evaporation integrated device has a cuboid structure. The heat storage block 5 is regularly and equidistantly distributed with a plurality of horizontally arranged through-holes, the through-holes 29 are reserved for heating tubes, the through-holes 30 are reserved for evaporation tubes, and the two types of holes are arranged alternately. The material of the heat storage block 5 can be pebbles, high-temperature-resistant ceramics, high-temperature-resistant and corrosion-resistant concrete, and a sealed phase-change material can be mixed in the heat storage block 5 .

As shown in FIG. 12 , the heat storage block 5 inside the cylindrical high-temperature heat storage and evaporation integrated device has a cylindrical structure. The heat storage block 5 is regularly and equidistantly distributed with a plurality of through holes, the through holes 29 are reserved for heating tubes, and the through holes 30 are reserved for evaporation tubes, and the two types of holes are arranged alternately. The material of the heat storage block 5 can be pebbles, high-temperature-resistant ceramics, high-temperature-resistant and corrosion-resistant concrete, and a sealed phase-change material can be mixed in the heat storage block 5 .

Figure 13 is a schematic diagram of the specific usage method of the multi-module system composed of three high-temperature heat storage and evaporation integrated devices. The valve A10, the valve B11, the valve C12, the valve D13, the valve E14, the valve F15, the valve G16, and the valve H17 are all valves for controlling the on-off of the heating pipeline. The valve I18, the valve J19, the valve K20, the valve L21, the valve M22, the valve N23, the valve O24, and the valve P25 are all valves for controlling the on-off of the evaporation pipeline. The high-temperature heat storage and evaporation integrated device Q26, the high-temperature heat storage and evaporation integrated device R27, and the high-temperature heat storage and evaporation integrated device S28 are three high-temperature heat storage and evaporation integrated devices with the same structure. By changing the opening and closing state of the valve, the following various charging and discharging modes can be realized:

1) The high-temperature heat storage and evaporation integrated device is in a separate heat-charging and heat-releasing mode. When the available stored energy is less, a single high-temperature heat storage and evaporation integrated device can be charged. Valve A10, valve B11, valve G16, valve F15 can be opened, and other valves of the heating pipeline can be closed. The high-temperature heat transfer medium will flow into the high-temperature heat storage and evaporation integrated device R27 through valve A10 and valve B11, and flow out through valve G16 and valve F15 after heat exchange. When the high-temperature heat storage and evaporation integrated device R27 is heated to the predetermined temperature and the heat storage process is completed, open valve A10, valve C12, valve H17, and valve F15, and close other valves in the heating pipeline, and the high-temperature heat storage and evaporation can be integrated separately. The heating device Q26 is heated to a predetermined temperature. Similarly, open the valve A10, the valve D13, the valve E14, the valve F15, and close the other valves of the heating pipeline, and the high-temperature heat storage and evaporation integrated device S28 can be independently heated to a predetermined temperature.

When the amount of steam used is small, the energy required for evaporation is small, and the high-temperature heat storage and evaporation integrated device needs to provide steam separately for heat release, open valve I18, valve N23, valve J19, valve M22, and close other valves in the evaporation pipeline , the low-temperature steam will flow into the high-temperature heat storage and evaporation integrated device R27 through the valve I18 and the valve N23, and flow out through the valve J19 and the valve M22 after heat exchange. When the heat storage in the high-temperature heat storage and evaporation integrated device R27 is reduced to the point that the steam cannot be supplied to the set parameters, open valve I18, valve O24, valve L21, valve M22, and close other valves in the evaporation pipeline, and then it can be used alone The high-temperature heat storage and evaporation integrated device Q26 heats the low-temperature steam to the set parameters. Similarly, open valve I18, valve P25, valve K20, valve M22, and close other valves in the evaporation pipeline, and the high-temperature heat storage and evaporation integrated device S28 can be used alone to heat the low-temperature steam to the set parameters.

2) The high-temperature heat storage and evaporation integrated device simultaneously charges and releases heat. When the stored energy is sufficient, multiple high-temperature heat storage and evaporation integrated devices in the system can be charged simultaneously. Simultaneously open valve A10, valve B11, valve C12, valve D13, valve E14, valve F15, valve G16, valve H17 on the heating pipeline, high-temperature heat storage and evaporation integrated device Q26, high-temperature heat storage and evaporation integrated device R27, high-temperature storage The thermal evaporation integrated device S28 is in a parallel state with each other, and the high-temperature heat transfer working medium can simultaneously heat the high-temperature heat storage and evaporation integrated device Q26, the high-temperature heat storage and evaporation integrated device R27, and the high-temperature heat storage and evaporation integrated device S28 to the set temperature .

When the amount of steam used is large, the energy required for evaporation is large, and multiple high-temperature heat storage and evaporation integrated devices are required to work at the same time to heat the steam, open the valve I18, valve J19, valve K20, valve L21, and valve M22 on the evaporation pipeline at the same time , valve N23, valve O24, valve P25, the low-temperature steam is simultaneously heated to the set parameters by the high-temperature heat storage and evaporation integrated device Q26, the high-temperature heat storage and evaporation integrated device R27, and the high-temperature heat storage and evaporation integrated device.

Claims (5)

1. A high-temperature heat storage and evaporation integrated device, characterized in that: the device consists of a heat storage block (5), a liquid storage tank (7), an insulation layer (4), a heating tube (8), and an evaporation tube ( 9) Composition; the insulation layer (4) is closely attached to the outer wall of the liquid storage tank (7); the heat storage block (5) is placed inside the liquid storage tank (7); the heat storage block (5) is regularly and equidistantly distributed with A plurality of through holes arranged horizontally; the heat storage block (5) is mixed with phase change material; gaps are left between the heat storage blocks (5); gap; there is a gap between the through hole of the heat storage block and the heating tube and the evaporation tube; the heating tube (8) and the evaporation tube (9) are arranged alternately, passing through the through hole on the heat storage block (5); The container of the liquid tank (7) is filled with a high-temperature heat-transfer working medium; when the heat storage temperature of the high-temperature heat storage and evaporation integrated device is within 600°C, the high-temperature heat-transfer working medium filled in the liquid storage tank (7) is mixed molten salt. 2. The high temperature heat storage and evaporation integrated device according to claim 1, characterized in that the heat storage block (5) is made of high temperature resistant concrete, pebbles or ceramics. 3. A high-temperature heat storage and evaporation integrated device according to claim 1, characterized in that when the heat storage temperature of the high-temperature heat storage and evaporation integrated device is within 400°C, the liquid storage tank (7) is filled with High-temperature heat transfer working medium or heat transfer oil instead of mixed molten salt. At this time, the heat transfer oil in the liquid storage tank (7) needs to be protected by inert gas. The liquid storage tank (7) is a pressure-bearing structure. The heat transfer working medium is heat transfer oil or molten salt; when the heat storage temperature of the high-temperature heat storage and evaporation integrated device is within 600°C, the high-temperature heat transfer working medium filled in the liquid storage tank (7) is a mixed molten salt, At this moment, the liquid storage tank (7) is a non-pressure-bearing structure. 4. A high-temperature heat storage and evaporation integrated device according to claim 1, characterized in that the heating tube inlet (1), the heating tube outlet (6), the evaporation tube inlet (2) and the evaporation tube outlet (3) are exposed The liquid storage tank (7) and the outer side of the insulation layer (4). 5. A high-temperature heat storage and evaporation integrated device according to claim 1, characterized in that when starting at low temperature, hot water or low-temperature steam enters the evaporator tube (9) from the evaporator tube inlet (2) to heat the liquid storage tank (7) The high-temperature heat transfer fluid filled inside preheats the heat storage block (5) and the heating tube (8) inserted in it, and then flows out from the outlet of the evaporation tube (3); the solidified high temperature in the heating tube (8) The heat transfer medium is heated and melted into a liquid state; when the high-temperature heat storage and evaporation integrated device is charged, the high-temperature heat transfer fluid enters the heating pipe (8) from the heating pipe inlet (1), and heats the high-temperature fluid filled in the liquid storage tank (7). The heat transfer working fluid exchanges heat, heats the heat storage block (5) and flows out from the heating pipe outlet (6); the heat is stored in the high temperature heat transfer working medium inside the heat storage block (5) and the liquid storage tank (7); the high temperature When the heat storage and evaporation integrated device releases heat, hot water or low-temperature steam enters the evaporator tube (9) from the evaporator tube inlet (2), and the high-temperature heat transfer medium and heat storage block (5) inside the liquid storage tank (7) After heat exchange, it is heated into high-temperature steam and flows out from the outlet (3) of the evaporation tube.

Images