CN210373690U - Large-scale energy storage heating system - Google Patents
Large-scale energy storage heating system Download PDFInfo
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- CN210373690U CN210373690U CN202020158428.XU CN202020158428U CN210373690U CN 210373690 U CN210373690 U CN 210373690U CN 202020158428 U CN202020158428 U CN 202020158428U CN 210373690 U CN210373690 U CN 210373690U
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Abstract
The utility model relates to a large-scale energy storage heating system, which comprises a high-temperature water tank, a low-temperature water tank, an electric heat storage boiler, a heat pump unit, a high-temperature heat storage and supply loop and a low-temperature heat storage and supply loop; the high-temperature water tank and the electric heat storage boiler are positioned on the high-temperature heat storage and supply loop, and the low-temperature water tank and the heat pump unit are positioned on the low-temperature heat storage and supply loop; the high-temperature water tank is positioned in the low-temperature water tank, the high-temperature water tank is not in contact with the low-temperature water tank, a low-temperature water medium is filled between the high-temperature water tank and the low-temperature water tank, and a high-temperature water medium is filled in the high-temperature water tank; the high-temperature heat storage and supply loop and the low-temperature heat storage and supply loop are connected in parallel for supplying heat. The system mainly comprises a heat pump unit and an electric heat storage boiler to form double heat sources, and the water storage tanks of the two heat sources form a tank-in-tank, so that parallel heat supply is realized, and the heat supply problems in large floor area and equipment maintenance process are solved.
Description
Technical Field
The utility model belongs to the technical field of clean heat supply, concretely relates to large-scale energy storage heating system.
Background
In recent years, the investment of our country on new energy is greatly increased, the industry of new energy is also sharply expanded, and particularly, the heat demand in winter in the north is increased, so that new energy is urgently needed to replace the traditional fossil fuel. The electric heat storage and energy storage is a brand new direction, most of heat storage and energy storage systems adopt a valve to control the whole heat supply loop, and when equipment fails or is overhauled, the whole loop needs to stop working, so that the heat utilization requirement of a user is influenced. In addition, in the existing multi-heat-source heat supply system, the heat storage device of each heat source is independently arranged, so that the occupied space is large.
Patent No. CN204962941U discloses a high-temperature molten salt energy storage heating system, which ensures heat supply through a closed cycle buffer heating loop and a closed cycle heat-carrying heating loop double heating loop, and realizes hot water supply through molten salt-water primary heat exchange and then water-water secondary heat exchange by using a molten salt energy storage technology. However, the system needs two times of heat exchange when using hot water, the heat loss is large during the two times of heat exchange, equipment faults occur during the use, and the heat supply needs to be stopped in a regular overhaul period.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model aims to solve the problem of providing a large energy storage heating system; the system mainly comprises a heat pump unit and an electric heat storage boiler to form double heat sources, and the water storage tanks of the two heat sources form a tank-in-tank, so that parallel heat supply is realized, and the heat supply problems in large floor area and equipment maintenance process are solved.
The technical scheme adopted by the utility model for solving the technical problems is to provide a large-scale energy storage and heat supply system, which comprises a high-temperature water tank, a low-temperature water tank, an electric heat storage boiler, a heat pump unit, a high-temperature heat storage and heat supply loop and a low-temperature heat storage and heat supply loop; the high-temperature water tank and the electric heat storage boiler are positioned on the high-temperature heat storage and supply loop, and the low-temperature water tank and the heat pump unit are positioned on the low-temperature heat storage and supply loop; the high-temperature water tank is positioned in the low-temperature water tank, the high-temperature water tank is not in contact with the low-temperature water tank, a low-temperature water medium is filled between the high-temperature water tank and the low-temperature water tank, and a high-temperature water medium is filled in the high-temperature water tank; the high-temperature heat storage and supply loop and the low-temperature heat storage and supply loop are connected in parallel for supplying heat.
A plurality of annular first baffle plates are welded on the outer wall of the high-temperature water tank at intervals from top to bottom, and each first baffle plate is not in contact with the inner wall of the low-temperature water tank, so that a flow channel for passing a low-temperature water medium is formed between each first baffle plate and the inner wall of the low-temperature water tank; a plurality of annular second baffle plates are welded on the inner wall of the low-temperature water tank at intervals from top to bottom, each second baffle plate is positioned between two adjacent first baffle plates, and each second baffle plate is not in contact with the outer wall of the high-temperature water tank, so that a flow channel for passing a low-temperature water medium is also formed between each second baffle plate and the outer wall of the high-temperature water tank; and a plurality of heat storage balls are respectively fixed on each first baffle plate and each second baffle plate.
The high-temperature heat storage and supply loop also comprises a high-temperature heat storage pipeline and a high-temperature heat supply pipeline; one end of the high-temperature heat storage pipeline penetrates through the top of the low-temperature water tank and is in sealed connection with a water inlet in the top of the high-temperature water tank; the other end of the high-temperature heat storage pipeline is connected with a water return end of an external heat utilization device, and an electric heat storage boiler and a high-temperature tank water return electric valve are arranged on the high-temperature heat storage pipeline; one end of the high-temperature heat supply pipeline respectively penetrates through the top of the low-temperature water tank and the top of the high-temperature water tank and extends into the lower part of the high-temperature water tank; the other end of the high-temperature heat supply pipeline is connected with the water inlet end of the external heat consumption device, and a high-temperature tank circulating pump, a first temperature sensor and a high-temperature tank water inlet electric valve are arranged on the high-temperature heat supply pipeline.
The low-temperature heat storage and supply loop also comprises a low-temperature heat storage pipeline and a low-temperature heat supply pipeline; one end of the low-temperature heat storage pipeline is hermetically connected with a water inlet at the lower part of the low-temperature water tank, the other end of the low-temperature heat storage pipeline is connected with a part of the high-temperature heat storage pipeline close to an external heat utilization device, and a heat pump unit and a low-temperature tank water return electric valve are arranged on the low-temperature heat storage pipeline; one end of the low-temperature heat supply pipeline is hermetically connected with a water outlet at the upper part of the low-temperature water tank, and the other end of the low-temperature heat supply pipeline is connected with a part of the high-temperature heat supply pipeline close to an external heat utilization device; and a low-temperature tank circulating pump, a second temperature sensor and a low-temperature tank water outlet electric valve are arranged on the low-temperature heat supply pipeline.
The outer wall of the low-temperature water tank is coated with a storage tank heat-insulating layer, and the heat conductivity coefficient of the material used for the storage tank heat-insulating layer is not higher than 0.04W/(m.k).
The high-temperature water tank and the low-temperature water tank are both made of stainless steel.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the high-temperature water tank of the utility model is positioned in the low-temperature water tank to form a tank-in-tank, thus greatly reducing the occupied space; the low temperature water pitcher still can play the outer heat preservation function of high temperature water pitcher, and the heat transfer of high temperature water pitcher can be stored unnecessary heat in the heat accumulation ball, has effectively ensured thermal make full use of, has greatly reduced the heat waste, has shortened heat pump set's heat time simultaneously. Compared with the traditional double-tank water heat storage system, the system has the advantages that complex pipelines are reduced, and the cost is reduced.
2. During normal use, high temperature water pitcher cooperation electric heat accumulation boiler can satisfy daily heat supply demand, if meet special circumstances, for example when electric heat accumulation boiler overhauls, equipment trouble scheduling problem, launch low temperature heat accumulation heat supply loop, form two heat sources one main one and assist the heat supply mode for outside heat application device heat supply, can effectively deal with emergency to hydrothermal stable supply has been guaranteed.
3. The heat supply system realizes direct supply of hot water, reduces complex equipment and processes such as primary heat exchange and secondary heat exchange, occupies smaller area, has less heat loss and improves the overall efficiency.
Drawings
Fig. 1 is a schematic diagram of the connection of the components of the large energy storage heating system of the present invention;
fig. 2 is a schematic view of the installation of the first baffle plate and the heat storage ball of the large energy storage heating system of the present invention;
in the figure, 1-high temperature water tank; 2-a low-temperature water tank; 3-heat storage ball; 4-low temperature aqueous medium; 5-baffle plate I; 6-storage tank insulating layer; 7-high temperature aqueous medium; 8-an electric heat storage boiler; 9-high temperature tank circulation pump; 10-low temperature tank circulation pump; 11-a heat pump unit; 12-high temperature tank water replenishing pump; 13-a high-temperature tank backwater electric valve; 14-high temperature tank water outlet electric valve; 15-electric valve for water outlet of low-temperature tank; 16-a low-temperature tank water replenishing pump; 17-a low-temperature tank backwater electric valve; 18-temperature sensor number one; 19-temperature sensor number two; 20-number two baffle plate.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, and the specific embodiments are only used for further describing the present invention in detail.
The utility model provides a large-scale energy storage heating system (for short, refer to fig. 1-2), which comprises a high-temperature water tank 1, a low-temperature water tank 2, an electric heat storage boiler 8, a heat pump unit 11, a high-temperature heat storage pipeline, a high-temperature heat supply pipeline, a low-temperature heat storage pipeline and a low-temperature heat supply pipeline;
the high-temperature water tank 1 is positioned in the low-temperature water tank 2, the high-temperature water tank 1 is not in contact with the low-temperature water tank 2, and a low-temperature water medium 4 is filled between the high-temperature water tank 1 and the low-temperature water tank 2; a high-temperature water medium 7 is filled in the high-temperature water tank 1; one end of the high-temperature heat storage pipeline penetrates through the top of the low-temperature water tank 2 and is hermetically connected with a water inlet at the top of the high-temperature water tank 1; the other end of the high-temperature heat storage pipeline is connected with a water return end A of an external heat utilization device; the electric heat storage boiler 8 and the high-temperature tank backwater electric valve 13 are both arranged on the high-temperature heat storage pipeline and are both connected with an external controller; one end of the high-temperature heat supply pipeline respectively penetrates through the top of the low-temperature water tank 2 and the top of the high-temperature water tank 1 and extends into the lower part of the high-temperature water tank 1; the other end of the high-temperature heat supply pipeline is connected with a water inlet end B of an external heat utilization device; the high-temperature tank circulating pump 9, the first temperature sensor 18 and the high-temperature tank water inlet electric valve 14 are all arranged on the high-temperature heat supply pipeline and are connected with an external controller, and the first temperature sensor 18 is used for measuring the water temperature of the high-temperature water medium 7; the high-temperature tank water replenishing pump 12 is connected to the high-temperature heat storage pipeline through a first connecting pipe, the first connecting pipe is connected with the high-temperature heat storage pipeline, and the free end C of the first connecting pipe is used for replenishing water;
the high-temperature water medium 7 in the high-temperature water tank 1 flows to an external heat-using device through a high-temperature heat supply pipeline to exchange heat under the action of a high-temperature tank circulating pump 9; the water after heat exchange flows to the electric heat storage boiler 8 through the high-temperature heat storage pipeline, is heated in the electric heat storage boiler 8 and then enters the high-temperature water tank 1; the high-temperature heat storage pipeline, the electric heat storage boiler 8, the high-temperature water tank 1, the high-temperature heat supply pipeline and an external heat utilization device form a high-temperature heat storage and supply loop together, and the electric heat storage boiler 8 can provide high-temperature water at the temperature of 70-90 ℃;
one end of the low-temperature heat storage pipeline is hermetically connected with a water inlet at the lower part of the low-temperature water tank 2, and the other end of the low-temperature heat storage pipeline is connected with a pipe section, close to an external heat utilization device, of the high-temperature heat storage pipeline; the heat pump unit 11 and the low-temperature tank backwater electric valve 17 are both arranged on the low-temperature heat storage pipeline and are both connected with an external controller; one end of the low-temperature heat supply pipeline is hermetically connected with a water outlet at the upper part of the low-temperature water tank 2, and the other end of the low-temperature heat supply pipeline is connected with a pipeline section which is close to an external heat utilization device on the high-temperature heat supply pipeline; the low-temperature tank circulating pump 10, the second temperature sensor 19 and the low-temperature tank water outlet electric valve 15 are all arranged on the low-temperature heat supply pipeline and are all connected with an external controller, and the second temperature sensor 19 is used for measuring the water temperature of the low-temperature water medium 4; the low-temperature tank water replenishing pump 16 is connected to the low-temperature heat storage pipeline through a second connecting pipe, the second connecting pipe is connected with the low-temperature heat storage pipeline, and the free end D of the second connecting pipe is used for replenishing water;
water in the low-temperature water tank 2 flows to an external heat-using device through a low-temperature heat supply pipeline for heat exchange under the action of a low-temperature tank circulating pump 10; the water after heat exchange flows to the heat pump unit 11 through the low-temperature heat storage pipeline, is heated at the heat pump unit 11 and then enters the low-temperature water tank 2; the low-temperature heat storage pipeline, the heat pump unit 11, the low-temperature water tank 2, the low-temperature heat supply pipeline and an external heat utilization device jointly form a low-temperature heat storage and supply loop, the heat pump unit 11 can provide low-temperature hot water at the temperature of about 50 ℃, and the low-temperature heat storage and supply loop and the high-temperature heat storage and supply loop form a parallel connection relationship to jointly supply heat;
a plurality of annular first baffle plates 5 are welded on the outer wall of the high-temperature water tank 1 at intervals from top to bottom, and each first baffle plate 5 is not in contact with the inner wall of the low-temperature water tank 2, so that a flow channel for passing the low-temperature water medium 4 is formed between each first baffle plate 5 and the inner wall of the low-temperature water tank 2; a plurality of annular second baffle plates 20 are welded on the inner wall of the low-temperature water tank 2 at intervals from top to bottom, each second baffle plate 20 is positioned between two adjacent first baffle plates 5, and each second baffle plate 20 is not in contact with the outer wall of the high-temperature water tank 1, so that a flow channel for passing the low-temperature water medium 4 is also formed between each second baffle plate 20 and the outer wall of the high-temperature water tank 1; a plurality of heat storage balls 3 are fixed on each of the first baffle plate 5 and the second baffle plate 20, and the heat storage balls 3 are used for absorbing heat in the low-temperature water medium 4; the low-temperature water medium 4 enters the low-temperature water tank 2, and under the action of the low-temperature tank circulating pump 10, the low-temperature water medium 4 sequentially passes through a flow channel formed by the second baffle plate 20 positioned at the lower part of the low-temperature water tank 2 and the outer wall of the high-temperature water tank 1, a flow channel formed by the adjacent first baffle plate 5 and the inner wall of the low-temperature water tank 2, and a flow channel formed by the adjacent second baffle plate 20 and the outer wall of the high-temperature water tank 1, so that the low-temperature water medium 4 flows in a snake shape in the low-temperature water tank 2, the low-temperature water medium 4.
The heat storage balls 3 are filled with high-density heat storage materials, the filling coefficient is not more than 85%, and the heat storage temperature of the heat storage materials is 40-50 ℃; the shell of the heat storage ball 3 is made of high-temperature-resistant and corrosion-resistant materials such as Polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), Polystyrene (PS) or acrylonitrile-butadiene-styrene copolymer (ABS), and the materials can be selected according to the selected heat storage materials, so that no chemical reaction exists between the materials of the shell of the heat storage ball 3 and the heat storage materials, and the heat storage ball has heat conductivity.
A plurality of grooves are respectively arranged on the first baffle plate 5 and the second baffle plate 20, and the heat storage balls 3 are clamped in the grooves.
The outer wall of the low-temperature water tank 2 is coated with a storage tank heat-insulating layer 6, and the heat conductivity coefficient of the material used for the storage tank heat-insulating layer 6 is not higher than 0.04W/(m.k), so that heat loss is prevented.
The high-temperature water tank 1 and the low-temperature water tank 2 are both made of stainless steel, and the diameter of the high-temperature water tank 1 is 6m, and the height of the high-temperature water tank is 5 m; the low temperature water tank 2 has a diameter of 8m and a height of 7 m.
The models of the high-temperature tank circulating pump and the low-temperature tank circulating pump are both ISG 65-200; the type of the heat pump unit 11 is KLR-150H, and the heat pump unit 11 is arranged on the ground; the models of the high-temperature tank water replenishing pump and the low-temperature tank water replenishing pump are CDLF 2-60; the models of the high-temperature tank water return electric valve, the high-temperature tank water outlet electric valve, the low-temperature tank water outlet electric valve and the low-temperature tank water return electric valve are D943H-16C; the models of the first temperature sensor and the second temperature sensor are both GW 100-B-F; the external controller is model number SIEMENS 6ES7214-1AD23-0XB 8.
The first connecting pipe is arranged on a high-temperature heat storage pipeline between the electric heat storage boiler 8 and the high-temperature tank water return electric valve 13, and the connection of the water return end of the high-temperature heat storage and supply loop can be controlled by controlling the high-temperature tank water return electric valve 13;
the second connecting pipe is arranged on a low-temperature heat storage pipeline between the heat pump unit 11 and the low-temperature tank water return electric valve 17, and the connection of the water return end of the low-temperature heat storage and supply loop can be controlled by controlling the low-temperature tank water return electric valve;
the high-temperature water supply and the low-temperature water supply are respectively realized by respectively controlling the connection of the high-temperature tank water outlet electric valve 14 and the low-temperature tank water outlet electric valve 15.
The utility model discloses a theory of operation is:
the heat supply system takes a high-temperature heat storage and supply loop as a main heat supply loop and takes a low-temperature heat storage and supply loop as an auxiliary heat supply loop; when the high-temperature heat storage and supply loop supplies heat, the high-temperature tank water inlet electric valve 14 and the high-temperature tank water return electric valve 13 are opened, and the low-temperature tank water outlet electric valve 15 and the low-temperature tank water return electric valve 17 are closed; the electric heat storage boiler 8 works to heat the high-temperature water medium 7 and provide high-temperature water at 70-90 ℃, and the electric heat storage boiler has high efficiency and is stable enough to provide a stable heat source; when the water temperature measured by the first temperature sensor 18 reaches a set value (70-90 ℃, the specific value is set according to the power of the electric heat storage boiler 8), the electric heat storage boiler 8 stops working, and the high-temperature tank circulating pump 9 conveys the high-temperature water medium 7 to an external heat consumption device; when the water temperature measured by the first temperature sensor 18 is lower than a set value, the electric heat storage boiler 8 continues to work, and the temperature of the high-temperature water medium 7 is kept stable;
if the equipment of the high-temperature heat storage and supply loop is overhauled and runs in fault or stops running, the high-temperature tank water inlet electric valve 14 and the high-temperature tank water return electric valve 13 can be closed, the low-temperature tank water outlet electric valve 15 and the low-temperature tank water return electric valve 17 are opened, and the low-temperature heat storage and supply loop is started to ensure heat supply; the heat pump unit 11 works, the heat pump unit 11 has relatively low efficiency and low running cost, low-temperature hot water at about 50 ℃ is provided for the low-temperature water tank 2, and a part of heat is stored in the heat storage ball 3 when the low-temperature water medium 4 flows; when the water temperature measured by the second temperature sensor 19 reaches a set value (about 50 ℃, the specific value is set according to the power of the heat pump unit 11), the heat pump unit 11 stops working, and the low-temperature water medium 4 is conveyed to an external heat utilization device by the low-temperature tank circulating pump 10; when the water temperature measured by the second temperature sensor 19 is lower than the set value, the heat pump unit 11 continues to work, and the temperature of the low-temperature water medium 4 is kept stable.
The utility model relates to an outside heat-consuming device mainly is the radiator, and this heating system can be for the heating of mainly used buildings such as market, residential building, rural house, and the end of intaking of outside heat-consuming device still can draw forth and supply daily life to use hot water.
The utility model discloses the nothing is mentioned the part and is applicable to prior art.
Claims (6)
1. A large-scale energy storage heat supply system comprises a high-temperature water tank, a low-temperature water tank, an electric heat storage boiler, a heat pump unit, a high-temperature heat storage and supply loop and a low-temperature heat storage and supply loop; the high-temperature water tank and the electric heat storage boiler are positioned on the high-temperature heat storage and supply loop, and the low-temperature water tank and the heat pump unit are positioned on the low-temperature heat storage and supply loop; the high-temperature water tank is positioned in the low-temperature water tank, the high-temperature water tank is not in contact with the low-temperature water tank, a low-temperature water medium is filled between the high-temperature water tank and the low-temperature water tank, and a high-temperature water medium is filled in the high-temperature water tank; the high-temperature heat storage and supply loop and the low-temperature heat storage and supply loop are connected in parallel for supplying heat.
2. The large-scale energy storage and heat supply system according to claim 1, wherein a plurality of annular first baffle plates are welded on the outer wall of the high-temperature water tank at intervals from top to bottom, and each first baffle plate is not in contact with the inner wall of the low-temperature water tank, so that a flow channel for passing the low-temperature water medium is formed between each first baffle plate and the inner wall of the low-temperature water tank; a plurality of annular second baffle plates are welded on the inner wall of the low-temperature water tank at intervals from top to bottom, each second baffle plate is positioned between two adjacent first baffle plates, and each second baffle plate is not in contact with the outer wall of the high-temperature water tank, so that a flow channel for passing a low-temperature water medium is also formed between each second baffle plate and the outer wall of the high-temperature water tank; and a plurality of heat storage balls are respectively fixed on each first baffle plate and each second baffle plate.
3. A large scale energy storage and heating system according to claim 1, wherein the high temperature heat storage and heating loop further comprises a high temperature heat storage pipeline and a high temperature heat supply pipeline; one end of the high-temperature heat storage pipeline penetrates through the top of the low-temperature water tank and is in sealed connection with a water inlet in the top of the high-temperature water tank; the other end of the high-temperature heat storage pipeline is connected with a water return end of an external heat utilization device, and an electric heat storage boiler and a high-temperature tank water return electric valve are arranged on the high-temperature heat storage pipeline; one end of the high-temperature heat supply pipeline respectively penetrates through the top of the low-temperature water tank and the top of the high-temperature water tank and extends into the lower part of the high-temperature water tank; the other end of the high-temperature heat supply pipeline is connected with the water inlet end of the external heat consumption device, and a high-temperature tank circulating pump, a first temperature sensor and a high-temperature tank water inlet electric valve are arranged on the high-temperature heat supply pipeline.
4. A large scale energy storage and heating system according to claim 3, wherein said low temperature heat storage and heating loop further comprises a low temperature heat storage pipeline and a low temperature heat supply pipeline; one end of the low-temperature heat storage pipeline is hermetically connected with a water inlet at the lower part of the low-temperature water tank, the other end of the low-temperature heat storage pipeline is connected with a part of the high-temperature heat storage pipeline close to an external heat utilization device, and a heat pump unit and a low-temperature tank water return electric valve are arranged on the low-temperature heat storage pipeline; one end of the low-temperature heat supply pipeline is hermetically connected with a water outlet at the upper part of the low-temperature water tank, and the other end of the low-temperature heat supply pipeline is connected with a part of the high-temperature heat supply pipeline close to an external heat utilization device; and a low-temperature tank circulating pump, a second temperature sensor and a low-temperature tank water outlet electric valve are arranged on the low-temperature heat supply pipeline.
5. The large-scale energy-storage heating system according to claim 1, wherein the outer wall of the low-temperature water tank is coated with a storage tank insulating layer, and the thermal conductivity coefficient of the material used for the storage tank insulating layer is not higher than 0.04W/(m.k).
6. The large scale energy-storing and heating system according to claim 1, wherein the high temperature water tank and the low temperature water tank are both made of stainless steel.
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| CN202020158428.XU CN210373690U (en) | 2020-02-10 | 2020-02-10 | Large-scale energy storage heating system |
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| CN202020158428.XU CN210373690U (en) | 2020-02-10 | 2020-02-10 | Large-scale energy storage heating system |
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