New energy chemical heating device

Abstract

The utility model provides a new energy chemical heat supply device which comprises a new energy power generation unit, a high-temperature decomposition furnace, an oxide furnace, a hydroxide furnace and a heat exchange system. The new energy power generation unit is electrically connected with the high-temperature decomposition furnace; the high-temperature decomposition furnace is used for decomposing carbonate into metal oxide; a feeding hole of the oxide furnace is connected with a solid outlet of the high-temperature decomposing furnace so as to receive metal oxide from the high-temperature decomposing furnace; the oxide furnace is provided with a water inlet for adding water; the hydroxide furnace is provided with a gas inlet for introducing carbon dioxide-containing gas, and a feed port of the hydroxide furnace is connected with a discharge port of the oxide furnace so as to receive a product from the oxide furnace and enable the product to react with the introduced carbon dioxide-containing gas to form carbonate; and the heat exchange system is configured to exchange heat with the oxide furnace and the hydroxide furnace so as to collect heat. The device disclosed by the utility model is small in occupied area, more flexible in heat storage and heat supply, and capable of obviously reducing the heat supply cost.

Description

TECHNICAL FIELD

[0001] The utility model belongs to new energy heating technology field, concretely relates to new energy chemical heating device. BACKGROUND

[0002] At present, people's living standards are constantly improving, and the comfort level of living environment is also increasingly high. In the past, many cities in the south of the Yellow River did not use heating measures in building, but more and more cities provide centralized heating for urban buildings. Especially in recent years, cities south of the Yangtze River have also begun to gradually provide centralized heating in winter, making the urban centralized heating area in China grow continuously.

[0003] In the process of urban heating, coal is most commonly used as energy in China, which is directly related to the fact that China is a large country with coal as the main energy. In addition to coal, electric energy is also widely used in urban heating. There are basically three heating methods in urban heating in China. The first heating method is centralized heating, which can be realized by a heat and power plant or a regional boiler room, and is currently the main way of urban centralized heating. The second heating method is the boiler room heating method, which is also the main heating method in cities at present. The third heating method is the decentralized heating method, which is commonly used in northern China, but this heating method pollutes the environment and wastes energy.

[0004] Traditional coal-fired heating is gradually being replaced by clean energy heating. Clean energy heating includes natural gas heating, geothermal heating, solar heating, etc. These energy sources have high utilization efficiency and little environmental pollution, and will become the mainstream of the future heating industry.

[0005] For example, photo-thermal molten salt energy storage has been developed in the prior art. Photo-thermal molten salt energy storage uses solar energy to heat molten salt and stores it as heat energy for release when needed. Molten salt is usually a mixture composed of chemicals such as lithium, potassium, sodium, and sodium nitrate. In a photo-thermal molten salt energy storage system, a solar energy collector absorbs solar radiation and concentrates it on molten salt to heat it. The heated molten salt can be stored in a heat storage tank wrapped in thermal insulation material for release of heat energy when needed for heating.

[0006] However, due to the inherent defects of molten salt, such as low thermal conductivity, low specific heat capacity, corrosiveness, and liquid leakage during phase change, this technology has the disadvantages of insufficient efficiency and environmental pollution. UTILITY MODEL CONTENTS

[0007] In view of this, the utility model aims to solve the defects in the prior art by providing a new energy chemical heating device. The new energy chemical heating device of the utility model realizes the supply of heat energy through the conversion of chemical energy and heat energy, has a small footprint, and is more flexible in heat storage and heating, which can significantly reduce heating costs.

[0008] The utility model discloses a purpose mainly is realized through following technical schemes.

[0009] The utility model provides new energy chemical heating device, new energy chemical heating device includes new energy power generation unit, high temperature decomposition furnace, oxide furnace, hydroxide furnace and heat exchange system,

[0010] Among them, new energy power generation unit with high temperature decomposition furnace electricity is connected for providing the electric energy to high temperature decomposition furnace,

[0011] High temperature decomposition furnace is used for decomposing carbonate into metal oxide,

[0012] The feed inlet of the oxide furnace is connected with the solid outlet of the high temperature decomposition furnace to receive the metal oxide from the high temperature decomposition furnace, and the oxide furnace is provided with a water inlet for adding water.

[0013] The hydroxide furnace is provided with a gas inlet for introducing carbon dioxide-containing gas, and the feed inlet of the hydroxide furnace is connected with the discharge outlet of the oxide furnace to receive the product from the oxide furnace and react with the introduced carbon dioxide-containing gas to form carbonate.

[0014] The heat exchange system is configured to exchange heat with the oxide furnace and the hydroxide furnace to collect heat.

[0015] Preferably, the new energy chemical heating device further comprises a gas buffer tank, the high temperature decomposition furnace is provided with a gas outlet, the gas outlet of the high temperature decomposition furnace is connected with the gas buffer tank, and the gas buffer tank is connected with the gas inlet of the hydroxide furnace.

[0016] Preferably, the high temperature decomposition furnace is located above the oxide furnace, and the solid outlet of the high temperature decomposition furnace is directly connected with the feed inlet of the oxide furnace.

[0017] Preferably, the oxide furnace is provided with a safety valve at the top.

[0018] Preferably, the feed inlet of the hydroxide furnace is connected with the discharge outlet of the oxide furnace through a conveying pipeline.

[0019] Preferably, the heat exchange system comprises a circulating pipeline and a heat exchange pipe, the heat exchange pipe is arranged inside or outside the oxide furnace and the hydroxide furnace, and the heat exchange pipe is in communication with the circulating pipeline.

[0020] Preferably, the high temperature decomposition furnace, the oxide furnace and the hydroxide furnace are each independently provided with a stirring mechanism.

[0021] Preferably, the new energy chemical heat supply device further comprises a solid-liquid separation device, which is connected with the discharge port of the hydroxide furnace via a conveying pipeline to receive and separate the carbonate precipitate from the hydroxide furnace.

[0022] Preferably, the solid-liquid separation device is a filter, and the solid outlet of the filter is connected with the feed inlet of the high-temperature decomposition furnace, and the liquid outlet of the filter is connected with the water inlet of the oxide furnace.

[0023] Preferably, the new energy power generation unit is a photovoltaic power generation unit or a wind power generation unit.

[0024] The new energy chemical heat supply device has the following beneficial effects: 1) can meet the demand for stable heat supply, has small floor area, and heat storage and heat supply are more flexible; 2) has high heat supply utilization efficiency, does not pollute the environment, and solves the problems of low heat supply utilization efficiency and environmental pollution of traditional heat supply; 3) the new energy chemical heat supply device can use calcium carbonate as a decomposition raw material, which is convenient to obtain locally, and can generate metal oxide required for heat supply by decomposing calcium carbonate according to the demand of the day; 4) has low cost, saves investment, and can significantly reduce heating cost. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structural schematic view of one embodiment of the new energy chemical heat supply device of the utility model;

[0026] Figure 2 is a structural schematic view of another embodiment of the new energy chemical heat supply device of the utility model;

[0027] Figure 3 is a structural schematic view of one embodiment of the oxide furnace of the new energy chemical heat supply device of the utility model;

[0028] 1, new energy power generation unit; 2, high-temperature decomposition furnace; 21, feed inlet of high-temperature decomposition furnace; 3, oxide furnace; 31, water inlet; 4, hydroxide furnace; 41, gas inlet; 5, heat exchange system; 51, heat exchange pipe; 52, circulating pipeline; 6, solid-liquid separation device. DETAILED DESCRIPTION

[0029] The embodiments of the utility model will be specifically described below in combination with the drawings, wherein the drawings constitute a part of the utility model, and are used together with the embodiments of the utility model to explain the principles of the utility model.

[0030] The utility model provides new energy chemical heat supply device, new energy chemical heat supply device includes new energy power generation unit, high-temperature decomposition furnace, oxide furnace, hydroxide furnace and heat exchange system;

[0031] The new energy power generation unit is electrically connected with the high-temperature decomposition furnace and is used for providing electric energy for the high-temperature decomposition furnace.

[0032] The high-temperature decomposition furnace is used for decomposing the carbonate into metal oxide.

[0033] The feed inlet of the oxide furnace is connected with the solid outlet of the high-temperature decomposition furnace to receive the metal oxide from the high-temperature decomposition furnace; the oxide furnace is provided with a water inlet for adding water.

[0034] The hydroxide furnace is provided with a gas inlet for introducing carbon dioxide-containing gas; the feed inlet of the hydroxide furnace is connected with the discharge outlet of the oxide furnace to receive the product from the oxide furnace and react with the introduced carbon dioxide-containing gas to form carbonate; and

[0035] The heat exchange system is configured to exchange heat with the oxide furnace and the hydroxide furnace to collect heat.

[0036] Figure 1 An embodiment of the new energy chemical heat supply device is shown.

[0037] Referring to Figure 1 The new energy chemical heat supply device comprises a new energy power generation unit 1, a high-temperature decomposition furnace 2, an oxide furnace 3, a hydroxide furnace 4 and a heat exchange system 5.

[0038] The new energy power generation unit 1 is electrically connected with the high-temperature decomposition furnace 2 and is used for providing electric energy for the high-temperature decomposition furnace 2.

[0039] The high-temperature decomposition furnace 2 is used for decomposing the carbonate into metal oxide.

[0040] The feed inlet of the oxide furnace 3 is connected with the solid outlet of the high-temperature decomposition furnace 2 to receive the metal oxide from the high-temperature decomposition furnace 2; the oxide furnace 3 is provided with a water inlet 31 for adding water.

[0041] The hydroxide furnace 4 is provided with a gas inlet for introducing carbon dioxide-containing gas; the feed inlet of the hydroxide furnace 4 is connected with the discharge outlet of the oxide furnace 3 to receive the product from the oxide furnace 3 and react with the introduced carbon dioxide-containing gas to form carbonate.

[0042] The heat exchange system 5 is configured to exchange heat with the oxide furnace 3 and the hydroxide furnace 4 to collect heat.

[0043] In the new energy chemical heat supply device, the carbonate can be calcium carbonate, magnesium carbonate or the like, and preferably, calcium carbonate is used as the raw material in the high-temperature decomposition furnace 2.

[0044] The device, carbonate such as calcium carbonate is added to the high-temperature decomposition furnace 2 through the feed inlet 21 of the high-temperature decomposition furnace, and the carbonate such as calcium carbonate is decomposed into chemical raw material metal oxide such as calcium oxide in the high-temperature decomposition furnace 2, and the chemical reaction formula of the decomposed calcium carbonate is as follows:

[0045] CaCO3=CaO+CO2

[0046] Calcium carbonate decomposition needs to absorb heat, and the following data is obtained from the thermodynamic data table:

[0047] △H(CaCO3)=-1206.9kJ / mol

[0048] △H(CaO)=-635.5kJ / mol

[0049] △H(CO2)=-393.5kJ / mol

[0050] The total of the standard heat of formation of the reactants: △Hf1=-1206.9kJ / mol;

[0051] The total of the standard heat of formation of the products: △Hf2=-1029kJ / mol;

[0052] According to the law of Gais, △Hf1+△H=△Hf2;

[0053] Therefore, △H=△Hf2-△Hf1= -1029+1206.9=+177.9kJ / mol;

[0054] Therefore, 1 mol of calcium carbonate needs to absorb 177.9 kilojoules of energy.

[0055] In the oxide furnace 3, the metal oxide (calcium oxide) and water have a chemical reaction to generate the chemical raw material hydroxide (calcium hydroxide), and the chemical reaction formula of the calcium hydroxide is as follows:

[0056] CaO+H2O=Ca(OH)2

[0057] The chemical reaction of calcium oxide and water releases a large amount of heat, and the following data is obtained from the thermodynamic data table:

[0058] △H(CaO)=-635.5kJ / mol

[0059] △H(H2O)=-285.83kJ / mol

[0060] △H(Ca(OH)2)=-986.6kJ / mol

[0061] The total of the standard heat of formation of the reactants: △Hf1=-635.5-285.83=-921.33kJ / mol;

[0062] Sum of standard heat of formation of products: AHf2= -986.6 kJ / mol;

[0063] According to Hess's law: AHf1+ AH = AHf2,

[0064] Therefore, AH = AHf2- AHf1= -986.6 + 921.33 = -65.27 kJ / mol.

[0065] Therefore, 1 mol of calcium oxide reacts with water to release 65.27 kilojoules of energy.

[0066] In the hydroxide furnace 4, the hydroxide (calcium hydroxide) reacts with carbon dioxide to generate chemical raw materials carbonate (calcium carbonate), and the chemical reaction formula of calcium hydroxide is as follows:

[0067] Ca(OH)2+ CO2= CaCO3+ H2O

[0068] Calcium hydroxide reacts with carbon dioxide to release a large amount of heat, and the following data is obtained from the thermodynamic data table:

[0069] AH(Ca(OH)2)= -986.6 kJ / mol

[0070] AH(CO2)= -393.5 kJ / mol

[0071] AH(CaCO3)= -1206.9 kJ / mol

[0072] AH(H2O)= -285.83 kJ / mol

[0073] Sum of standard heat of formation of reactants: AHf1= -986.6 - 393.5 = -1380.1 kJ / mol;

[0074] Sum of standard heat of formation of products: AHf2= -1206.9 - 285.83 = -1492.73 kJ / mol;

[0075] According to Hess's law: AHf1+ AH = AHf2;

[0076] Therefore, AH = AHf2- AHf1= -1492.73 + 1380.1 = -112.63 kJ / mol.

[0077] Therefore, 1 mol of calcium hydroxide reacts with carbon dioxide to release 112.63 kilojoules of energy.

[0078] The heat exchange system 5 collects heat from the oxide furnace 3 and the hydroxide furnace 4, and supplies heating to (external) users.

[0079] Suppose that the heating of one square is considered as 100L water quantity, and the heat loss is 10%. The heating price is 20 yuan / m 2 The cost of new energy generation (photovoltaic power generation) is 0.3 yuan / kwh, the residential electricity price is 0.53 yuan / kwh, and the price of natural gas is 3.83 yuan / cubic meter. The combustion value of natural gas per cubic meter is 33600000J-35700000J, which is equivalent to 9.3-9.9 degrees of electricity.

[0080] 100L water quantity needs heat of 42000000J, and considering the heat loss, 13 degrees of electricity or 1.3 cubic meters of natural gas are needed. According to the law of conservation of energy, 262.3mol of calcium carbonate needs to be decomposed, that is, 26.2kg of calcium carbonate. If the residential electricity provides heating, the cost price S is 0.53*13=6.89 yuan, and the income price P is 20-6.89=13.11 yuan. If natural gas is used to provide heating, the cost price S is 3.83*1.3=5 yuan, and the income price P is 20-5=15 yuan. If new energy generation (photovoltaic power generation) is used to provide heating, the cost price S is 0.3*13=3.9 yuan, and the income price P is 20-3.9=16.1 yuan.

[0081] Through the above calculation, compared with the traditional heating equipment of electric heating and natural gas heating, the heating device of the utility model can obtain significant economic benefits.

[0082] At the same time, compared with the light heat molten salt energy storage which also uses light energy, the device of the utility model realizes high heating utilization efficiency and no pollution to the environment because of the simple and recyclable raw materials.

[0083] In some embodiments, the new energy chemical heating device of the utility model can further include a gas buffer tank. The high-temperature decomposition furnace 2 is provided with a gas outlet, the gas outlet of the high-temperature decomposition furnace 2 is connected with the gas buffer tank, and the gas buffer tank is connected with the gas inlet 41 of the hydroxide furnace 4.

[0084] In some embodiments, the pyrolysis furnace 2 is located above the oxide furnace 3, and the solid outlet of the pyrolysis furnace 2 is directly connected to the feed inlet of the oxide furnace 3. When the solid product (metal oxide) in the pyrolysis furnace 2 needs to be transported to the oxide furnace, the solid outlet of the pyrolysis furnace 2 is opened, so that the solid product in the pyrolysis furnace 2 falls directly into the oxide furnace 3.

[0085] In some specific embodiments, the bottom of the pyrolysis furnace 2 can be shaped as a funnel-shaped outlet, one end of which extends into the oxide furnace 3.

[0086] In some embodiments, a safety valve (not shown) is provided at the top of the oxide furnace 3. Metal oxides react violently with water. If heat is not transferred in time, water vaporizes into water vapor, and the pressure in the oxide furnace 3 increases. When the pressure increases to a threshold value, it is relieved to avoid safety hazards.

[0087] In some embodiments, the feed inlet of the hydroxide furnace 4 is connected to the discharge outlet of the oxide furnace 3 through a conveying pipeline. A screw can be provided in the conveying pipeline to prevent blockage.

[0088] In some embodiments, referring to Figure 3 , the heat exchange system 5 includes a circulating pipeline 52 and a heat exchange pipe 51, which is arranged inside or outside the oxide furnace 3 and the hydroxide furnace 4 and is in communication with the circulating pipeline 52. The heat exchange medium in the circulating pipeline 52 is heated through the heat exchange pipe 51 and then delivered to an external user end to provide heat to the user.

[0089] In some embodiments, the pyrolysis furnace 2, the oxide furnace 3, and the hydroxide furnace 4 are each independently provided with a stirring mechanism. By providing a stirring mechanism, the reactions in the pyrolysis furnace 2, the oxide furnace 3, and the hydroxide furnace 4 can be more complete, and the materials can be easily discharged.

[0090] In some embodiments, referring to Figure 2 , the new energy chemical heat supply device further includes a solid-liquid separation device 6. The solid-liquid separation device 6 is connected to the discharge outlet of the hydroxide furnace 4 through a conveying pipeline to receive and separate the carbonate precipitate from the hydroxide furnace 4.

[0091] In some specific embodiments, the solid-liquid separation device 6 is a filter, the solid outlet of which is connected to the feed inlet 21 of the pyrolysis furnace, and the liquid outlet of which is connected to the water inlet 31 of the oxide furnace 3.

[0092] In the solid-liquid separation device 6, the carbonate (such as calcium carbonate) precipitate generated in the hydroxide furnace 4 is separated from the water. The separated carbonate (such as calcium carbonate) precipitate can be added as raw material to the feed inlet 21 of the pyrolysis furnace for recycling. The separated water can be circulated back to the water inlet 31 of the oxide furnace 3 through a pipeline.

[0093] In some embodiments, the new energy power generation unit 1 is a photovoltaic power generation unit or a wind power generation unit, preferably a photovoltaic power generation unit. Compared with the wind power generation unit, the photovoltaic power generation unit has a wider use area and is more flexible.

[0094] In the utility model, photovoltaic power generation units or wind power generation units known in the art can be used. For example, the photovoltaic power generation unit mainly consists of photovoltaic modules, inverters and the like. The photovoltaic modules are connected to the inverters in series and in parallel, and the inverters are connected to the low-voltage switch cabinet of the power substation through the cable access device.

[0095] It should be noted that the above-described embodiments are only used to explain the utility model and do not constitute any limitation on the utility model. The utility model has been described by referring to typical embodiments, but it should be understood that the words used therein are descriptive and explanatory words, rather than limiting words. The utility model can be modified within the scope of the claims of the utility model, and the utility model can be revised within the scope and spirit of the utility model. Although the utility model described therein relates to specific methods, materials and embodiments, it does not mean that the utility model is limited to the specific examples disclosed therein, on the contrary, the utility model can be extended to all other methods and applications with the same function.

Claims

1. A new energy chemical heat supply device, characterized in that, The new energy chemical heat supply device comprises a new energy power generation unit (1), a high-temperature decomposition furnace (2), an oxide furnace (3), a hydroxide furnace (4) and a heat exchange system (5); The new energy power generation unit (1) is electrically connected with the high-temperature decomposition furnace (2) and is used for providing electric energy to the high-temperature decomposition furnace (2); The high-temperature decomposition furnace (2) is used for decomposing carbonates into metal oxides; The feed inlet of the oxide furnace (3) is connected with the solid outlet of the high-temperature decomposition furnace (2) to receive the metal oxides from the high-temperature decomposition furnace (2); the oxide furnace (3) is provided with a water inlet (31) for adding water; The hydroxide furnace (4) is provided with a gas inlet for introducing carbon dioxide-containing gas; the feed inlet of the hydroxide furnace (4) is connected with the discharge outlet of the oxide furnace (3) to receive the product from the oxide furnace (3) and make it react with the introduced carbon dioxide-containing gas to form carbonates; and The heat exchange system (5) is configured to exchange heat with the oxide furnace (3) and the hydroxide furnace (4) to collect heat.

2. The new energy chemical heat supply device according to claim 1, characterized in that, The new energy chemical heat supply device further comprises a gas buffer tank; the high-temperature decomposition furnace (2) is provided with a gas outlet; the gas outlet of the high-temperature decomposition furnace (2) is connected with the gas buffer tank; and the gas buffer tank is connected with the gas inlet (41) of the hydroxide furnace (4).

3. The new energy chemical heat supply device according to claim 2, characterized in that, The high-temperature decomposition furnace (2) is located above the oxide furnace (3); and the solid outlet of the high-temperature decomposition furnace (2) is directly connected with the feed inlet of the oxide furnace (3).

4. The new energy chemical heat supply device according to claim 1, characterized in that, The oxide furnace (3) is provided with a safety valve at the top.

5. The new energy chemical heat supply device according to any one of claims 1-4, characterized in that, The feed inlet of the hydroxide furnace (4) is connected with the discharge outlet of the oxide furnace (3) through a conveying pipeline.

6. The new energy chemical heat supply device according to any one of claims 1-4, characterized in that, The heat exchange system (5) comprises a circulating pipeline (52) and a heat exchange pipe (51); the heat exchange pipe (51) is arranged inside or outside the oxide furnace (3) and the hydroxide furnace (4); and the heat exchange pipe (51) is in communication with the circulating pipeline (52).

7. The new energy chemical heat supply device according to any one of claims 1-4, characterized in that, Each of the high-temperature decomposition furnace (2), the oxide furnace (3) and the hydroxide furnace (4) is independently provided with a stirring mechanism.

8. The new energy chemical heat supply device according to any one of claims 1-4, characterized in that, The new energy chemical heat supply device further comprises a solid-liquid separation device; the solid-liquid separation device is connected with the discharge outlet of the hydroxide furnace (4) through a conveying pipeline to receive and separate the carbonate precipitate from the hydroxide furnace (4).

9. The new energy chemical heat supply device according to claim 8, characterized in that, The solid-liquid separation device (6) is a filter; the solid outlet of the filter is connected with the feed inlet (21) of the high-temperature decomposition furnace; and the liquid outlet of the filter is connected with the water inlet (31) of the oxide furnace (3).

10. The new energy chemical heat supply device according to any one of claims 1-4, characterized in that, The new energy power generation unit (1) is a photovoltaic power generation unit or a wind power generation unit.

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