Thermal chemical heat storage material cycling stability test system

Abstract

The utility model relates to the technical field of heat storage, in particular to a system for testing the cycling stability of a thermochemical heat storage material. A thermal chemical heat storage material cycling stability test system comprises a sample test device provided with an inlet and an outlet and suitable for placing a to-be-tested sample; the gas supply assembly comprises a gas supply bottle and a gas supply main pipe, one end of the gas supply main pipe is communicated with the inlet, and the other end is communicated with the gas supply bottle; the tail gas treatment assembly comprises a gas outlet pipe and an anti-suck-back bottle, a solution is contained in the anti-suck-back bottle, one end of the gas outlet pipe is communicated with the outlet, the other end of the gas outlet pipe extends into the anti-suck-back bottle, the gas outlet pipe is located above the liquid level of the solution, and in the testing state, the gas supply bottle provides inert gas atmosphere, the humidifier provides water vapor, the sample to be tested reacts with the water vapor, and the sample to be tested is detected. And the residual water vapor enters the suck-back prevention bottle through the air outlet pipe. The device solves the problem of material failure caused by reaction between a sample to be tested and carbon dioxide in the air in the process of testing the cycling stability of the thermochemical heat storage material.

Description

Technical Field

[0001] The utility model relates to the technical field of heat storage, in particular to a cycle stability testing system for thermochemical heat storage materials. Background Art

[0002] Heat storage technology is one of the important technologies for achieving efficient energy utilization and environmental protection, with outstanding advantages of large scale, low cost and high safety. At the power generation end (solar thermal energy) and the grid side (electric heating), the heat storage system can be widely coupled with it, cooperate with the grid peak regulation, effectively balance the grid load, reduce the high-cost grid reinforcement investment, solve the problem of large fluctuations in renewable energy power, and help balance regional and seasonal demand; on the user side, heat storage has direct advantages in meeting heating and cooling needs. "Electric heating" heating is aimed at clean heating needs, replacing traditional scattered coal combustion heating, which can significantly reduce carbon emissions and effectively alleviate the environmental pressure caused by coal burning. In combination with efficient energy storage technology, the flexibility of heat supply and demand in time and space can be enhanced, and the low-valley electricity price policy can be used to encourage the low-cost operation of distributed heating, so as to achieve efficient and low-carbon terminal energy consumption. Therefore, it will play a key role in building energy hubs and energy platforms.

[0003] Among various heat storage technologies, thermochemical heat storage has become the most promising heat storage method due to its greater energy storage density and wider energy storage temperature range. However, there has been a lack of reliable data and research on the cyclic stability of thermochemical heat storage. During the use of traditional test devices, the samples to be tested are often directly exposed to the air, reacting with carbon dioxide in the air to form carbonates, causing partial failure of the material, affecting the accuracy and reliability of the test results. Utility Model Content

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that during the cyclic stability test of thermochemical heat storage materials, the sample to be tested reacts with the carbon dioxide in the air, resulting in material failure, thereby providing a cyclic stability test system for thermochemical heat storage materials.

[0005] In order to solve the above problems, the utility model provides a thermochemical heat storage material cycle stability test system, comprising:

[0006] A sample testing device, wherein the sample testing device is provided with an inlet and an outlet, and the sample testing device is suitable for placing a sample to be tested;

[0007] A gas supply assembly, the gas supply assembly comprising a gas supply bottle and a gas supply main pipe, one end of the gas supply main pipe is connected to the inlet, the other end of the gas supply main pipe is connected to the gas supply bottle, the gas supply bottle contains an inert gas, and the gas supply main pipe is provided with a humidifier;

[0008] An exhaust gas treatment component, the exhaust gas treatment component includes an exhaust pipe and an anti-backflow bottle, the anti-backflow bottle contains a solution, one end of the exhaust pipe is connected to the outlet, and the other end of the exhaust pipe extends into the anti-backflow bottle, the exhaust pipe is located above the liquid surface of the solution, under the test state, the gas supply bottle provides an inert gas atmosphere, the humidifier provides water vapor, the sample to be tested reacts with the water vapor, and the remaining water vapor enters the anti-backflow bottle through the exhaust pipe.

[0009] Optionally, the gas supply assembly includes a pressure gauge and a first pressure gauge, the pressure gauge is located on the gas supply bottle and the gas supply main pipe of the sample testing device bracket, and the first pressure gauge is located on the gas supply bottle.

[0010] Optionally, a first valve is provided on the gas supply main pipe, and the first valve is located on the gas supply main pipe between the pressure gauge and the gas supply bottle.

[0011] Optionally, a second valve is also provided on the air outlet pipe.

[0012] Optionally, the exhaust gas treatment component also includes an exhaust gas absorption cup, a connecting pipe is provided between the exhaust gas absorption cup and the anti-backflow bottle, the exhaust gas absorption cup contains a solution, and the connecting pipe is respectively located below the liquid level of the solution in the exhaust gas absorption cup and the solution in the anti-backflow bottle.

[0013] Optionally, the solution is one of an aqueous solution, a sodium hydroxide solution, and dilute hydrochloric acid.

[0014] Optionally, the air supply assembly further includes a humidifier connected to the main air supply pipeline.

[0015] Optionally, the humidifier is located between the pressure gauge and the first valve.

[0016] Optionally, the humidifier is connected to the main gas supply pipe via a gas supply branch pipe, a third valve is provided on the gas supply branch pipe, and a second pressure gauge is provided on the humidifier.

[0017] Optionally, the sample testing device comprises a sample placement tube, in which the sample to be tested is placed.

[0018] The technical solution of the utility model has the following advantages:

[0019] 1. The thermochemical heat storage material cycle stability test system provided by the utility model includes: a sample test device with an inlet and an outlet, and the sample test device is suitable for placing the sample to be tested; a gas supply component, including a gas supply bottle and a gas supply main pipe, one end of the gas supply main pipe is connected to the inlet, and the other end is connected to the gas supply bottle, the gas supply bottle contains inert gas, and the gas supply main pipe is provided with a humidifier; an exhaust gas treatment component, including an air outlet pipe and an anti-backflow bottle, the anti-backflow bottle contains a solution, one end of the air outlet pipe is connected to the outlet, and the other end of the air outlet pipe extends into the anti-backflow bottle, and the air outlet pipe is located above the liquid surface of the solution. In the test state, the gas supply bottle provides an inert gas atmosphere, and the humidifier provides water vapor. The sample to be tested reacts with the water vapor, and the remaining water vapor enters the anti-backflow bottle through the air outlet pipe. By providing an inert gas atmosphere, it is possible to avoid the sample to be tested from reacting with carbon dioxide in the air, and to prevent the liquid from backflowing into the sample test device.

[0020] 2. The thermochemical heat storage material cyclic stability testing system provided by the utility model, the gas supply assembly includes a pressure gauge and a first pressure gauge, the pressure gauge is located on the gas supply bottle and the gas supply main pipe of the sample testing device bracket, the first pressure gauge is located on the gas supply bottle, the pressure gauge tests the pressure on the gas supply main pipe, and the first pressure gauge tests the pressure of the gas supply bottle.

[0021] 3. The thermochemical heat storage material cyclic stability testing system provided by the utility model has a first valve on the gas supply main pipe, the first valve is located on the gas supply main pipe between the pressure gauge and the gas supply bottle, and the first valve is used to control the opening and closing of the gas supply main pipe.

[0022] 4. The thermochemical heat storage material cycle stability testing system provided by the utility model is also provided with a second valve on the outlet pipe to control the amount of exhaust gas passing through the outlet pipe.

[0023] 5. The thermochemical heat storage material cyclic stability testing system provided by the utility model, the exhaust gas treatment component also includes an exhaust gas absorption cup, a connecting pipe is provided between the exhaust gas absorption cup and the anti-backflow bottle, the exhaust gas absorption cup contains a solution, and the connecting pipes are respectively located below the liquid level of the solution in the exhaust gas absorption cup and the solution in the anti-backflow bottle, so that the solution in the anti-backflow bottle enters the exhaust gas absorption cup through the connecting pipe.

[0024] 6. The thermochemical heat storage material cyclic stability testing system provided by the utility model, the gas supply component also includes a humidifier connected to the gas supply main pipeline, and the humidifier provides water vapor to the gas supply main pipeline.

[0025] 7. In the thermochemical heat storage material cyclic stability test system provided by the utility model, the humidifier is located between the pressure gauge and the first valve to add water vapor to the reaction gas so that the reaction gas containing water vapor is in full contact with the sample to be tested, thereby solving the problems of uneven water inlet and difficulty in gasification of water in traditional thermal cycle tests.

[0026] 8. In the thermochemical heat storage material cyclic stability testing system provided by the utility model, a humidifier is connected to the gas supply main pipe through an air supply branch pipe, a third valve is provided on the air supply branch pipe, a second pressure gauge is provided on the humidifier, the third valve controls the switch of the air supply branch pipe, and the second pressure gauge monitors the pressure value in the humidifier.

[0027] 9. The thermochemical heat storage material cyclic stability testing system provided by the utility model, the sample testing device includes a sample placement tube, and the sample to be tested is placed in the sample placement tube so that the sample to be tested can fully react in the sample placement tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a schematic diagram of a thermochemical heat storage material cyclic stability testing system provided in an embodiment of the present utility model.

[0030] Explanation of the accompanying drawings: 1. First pressure gauge; 2. First valve; 3. Gas supply main pipe; 4. Pressure gauge; 5. Sample testing device; 6. Second valve; 7. Connecting pipe; 8. Exhaust gas absorption cup; 9. Anti-backflow bottle; 10. Air outlet pipe; 11. Sample placement tube; 12. Second pressure gauge; 13. Humidifier; 14. Third valve; 15. Gas supply bottle. DETAILED DESCRIPTION

[0031] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] like Figure 1 A specific embodiment of the thermochemical heat storage material cyclic stability testing system shown includes: a sample testing device 5, and an air supply component and an exhaust gas treatment component arranged on both sides of the sample testing device 5.

[0036] like Figure 1 As shown, an inlet and an outlet are respectively arranged on both sides of the sample testing device 5, and a sample placement tube 11 is arranged in the sample testing device 5, and a sample to be tested is placed in the sample placement tube 11. Specifically, the sample to be tested is a chemical heat storage material sample, preferably calcium hydroxide. To achieve the heating function, a heating element and a first controller are arranged in the sample testing device 5, and a thermometer and a hygrometer are arranged in the sample placement tube 11, and the first controller is connected to the heating element, the hygrometer and the thermometer circuit.

[0037] like Figure 1 As shown, the gas supply assembly includes a gas supply bottle 15 and a gas supply main pipe 3, wherein one end of the gas supply main pipe 3 is connected to the inlet of the sample testing device 5, and the other end is connected to the gas supply bottle 15, and the gas supply bottle 15 contains inert gas. In order to provide water vapor to the sample testing device 5, a humidifier 13 is also included. The humidifier 13 is connected to the gas supply main pipe 3 through a gas supply branch pipe. The humidifier 13 is located between the gas supply bottle 15 and the inlet, and the humidifier 13 provides water vapor through the gas supply branch pipe. Figure 1As shown, a first valve 2 is provided between the humidifier 13 and the gas supply bottle 15, a pressure gauge 4 is provided between the humidifier 13 and the sample testing device 5, and a third valve 14 is provided on the gas supply branch pipe. In order to detect the pressure in the gas supply bottle 15 and the humidifier 13, a first pressure gauge 1 is provided on the gas supply bottle 15, and a second pressure gauge 12 is provided on the humidifier 13.

[0038] like Figure 1 As shown, the exhaust gas treatment assembly includes an exhaust pipe 10, an anti-backflow bottle 9 and an exhaust gas absorption cup 8, wherein the anti-backflow bottle 9 and the exhaust gas absorption cup 8 both contain a solution, and a second valve 6 is provided on the exhaust pipe 10. Specifically, the solution is an aqueous solution, and the first valve 2, the second valve 6 and the third valve 14 are all electromagnetic one-way valves. Figure 1 As shown, one end of the air outlet pipe 10 is connected to the outlet of the sample testing device 5, and the other end extends into the anti-backflow bottle 9, and the end of the air outlet pipe 10 extending into the anti-backflow bottle 9 is located above the solution. Figure 1 As shown, the connecting pipe 7 is located below the liquid level of the solution in the tail gas absorption cup 8 and the solution in the anti-backflow bottle 9 respectively.

[0039] In order to realize automatic control, a second controller is also included, and the second controller is connected to the first controller, the first valve 2, the second valve 6 and the third valve 14 through lines respectively.

[0040] During the specific implementation process, the experimenter places the sample to be tested into the sample placement tube 11, and the heating element increases the temperature in the sample testing device 5. When the temperature rises to the preset temperature, the thermometer feeds back to the first controller in real time, and the first controller feeds back to the second controller. The second controller opens the first valve 2, the second valve 6 and the third valve 14, and the inert gas in the gas supply bottle 15 carries water vapor into the sample testing device 5, so that the water vapor directly reaches the surface of the sample to be tested, so that the sample to be tested and the water vapor produce a chemical reaction under high temperature conditions, and the excess water vapor enters the anti-backflow bottle 9 through the outlet pipe 10, and the solution in the anti-backflow bottle 9 absorbs the tail gas.

[0041] As an alternative embodiment, the solution may also be sodium hydroxide solution or dilute hydrochloric acid.

[0042] As an alternative implementation, the first valve 2 , the second valve 6 and the third valve 14 may also be manually adjusted.

[0043] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. A thermochemical heat storage material cyclic stability test system, characterized in that: include: A sample testing device (5), wherein the sample testing device (5) is provided with an inlet and an outlet, and the sample testing device (5) is suitable for placing a sample to be tested; A gas supply assembly, the gas supply assembly comprising a gas supply bottle (15) and a gas supply main pipe (3), one end of the gas supply main pipe (3) being connected to an inlet, and the other end of the gas supply main pipe (3) being connected to the gas supply bottle (15), the gas supply bottle (15) containing an inert gas, and the gas supply main pipe (3) being provided with a humidifier (13); An exhaust gas treatment component, the exhaust gas treatment component comprises an exhaust pipe (10) and an anti-backflow bottle (9), the anti-backflow bottle (9) contains a solution, one end of the exhaust pipe (10) is connected to an outlet, and the other end of the exhaust pipe (10) extends into the anti-backflow bottle (9), the exhaust pipe (10) is located above the liquid surface of the solution, and in a test state, the gas supply bottle (15) provides an inert gas atmosphere, the humidifier (13) provides water vapor, the sample to be tested reacts with the water vapor, and the remaining water vapor enters the anti-backflow bottle (9) through the exhaust pipe (10).

2. The thermochemical heat storage material cyclic stability testing system according to claim 1, characterized in that: The gas supply assembly comprises a pressure gauge (4) and a first pressure gauge (1), wherein the pressure gauge (4) is located on a gas supply bottle (15) and a gas supply main pipe (3) of a sample testing device (5) bracket, and the first pressure gauge (1) is located on the gas supply bottle (15).

3. The thermochemical heat storage material cyclic stability testing system according to claim 2, characterized in that: The gas supply main pipe (3) is provided with a first valve (2), and the first valve (2) is located on the gas supply main pipe (3) between the pressure gauge (4) and the gas supply bottle (15).

4. The thermochemical heat storage material cycle stability testing system according to claim 3, characterized in that: The air outlet pipe (10) is also provided with a second valve (6).

5. The thermochemical heat storage material cycle stability testing system according to claim 4, characterized in that: The exhaust gas treatment component also includes an exhaust gas absorption cup (8), a connecting pipe (7) is provided between the exhaust gas absorption cup (8) and the anti-backflow bottle (9), the exhaust gas absorption cup (8) contains a solution, and the connecting pipe (7) is respectively located below the liquid level of the solution in the exhaust gas absorption cup (8) and the solution in the anti-backflow bottle (9).

6. The thermochemical heat storage material cycle stability testing system according to claim 5, characterized in that: The solution is one of an aqueous solution, a sodium hydroxide solution and dilute hydrochloric acid.

7. The thermochemical heat storage material cycle stability testing system according to any one of claims 1 to 6, characterized in that: The air supply assembly also includes a humidifier (13) connected to the air supply main pipe (3) through a pipeline.

8. The thermochemical heat storage material cycle stability testing system according to claim 7, characterized in that: The humidifier (13) is located between the pressure gauge (4) and the first valve (2).

9. The thermochemical heat storage material cycle stability testing system according to claim 8, characterized in that: The humidifier (13) is connected to the main gas supply pipe (3) via a gas supply branch pipe, a third valve (14) is provided on the gas supply branch pipe, and a second pressure gauge (12) is provided on the humidifier (13).

10. The thermochemical heat storage material cycle stability testing system according to claim 9, characterized in that: The sample testing device (5) comprises a sample placement tube (11), in which a sample to be tested is placed.

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