Special calorific value instrument measuring system

Abstract

The utility model discloses a measuring system of a special calorific value instrument. The measuring system comprises a mixing module, a conveying module and a reaction measuring module, the mixing module is used for receiving and mixing sample gas and air to obtain continuous and stable mixed gas; the conveying module is connected with the mixing module and is used for emptying most of the mixed gas and conveying a small part of the mixed gas to the reaction measurement module; and the reaction measurement module is connected with the conveying module and is used for receiving a small part of mixed gas conveyed by the conveying module, performing catalytic oxidation reaction and measuring the oxygen content. Sample gas and air are stabilized by the pressure stabilizing valve at the bottom of the sampler, so that the pressure of the sample gas and the pressure of the air are consistent, the pressure and the temperature of the sample gas and the pressure and the temperature of the air are consistent after the sample gas and the air pass through the heat exchanger and the like, and the diluted mixed gas is stable, quick in response and more accurate in measurement, so that the measurement result is more stable; and the sample measurement is more representative.

Description

Technical Field

[0001] The utility model relates to the technical field of calorimeters, and particularly relates to a special calorimeter measurement system. Background Art

[0002] The existing calorimeters have complex structures, and the gas input into the calorimeters is unstable, which affects the measurement results and there is also a problem of long reaction time. Summary of the Invention

[0003] According to an embodiment of the utility model, there is provided a special calorimeter measurement system, comprising: a mixing module, a conveying module, and a reaction measurement module;

[0004] The mixing module is used to receive and mix the sample gas and air to obtain a continuously stable mixed gas;

[0005] The conveying module is connected to the mixing module and is used to vent most of the mixed gas and convey a small part of the mixed gas to the reaction measurement module;

[0006] The reaction measurement module is connected to the conveying module and is used to receive a small part of the mixed gas conveyed by the conveying module, perform a catalytic oxidation reaction, and measure the oxygen content.

[0007] Further, the mixing module comprises: a sample pressure stabilizing valve, an air pressure stabilizing valve, an air relay, a heat exchanger, and a mixing chamber;

[0008] The input end of the sample pressure stabilizing valve receives the sample gas;

[0009] The input end of the air pressure stabilizing valve receives the air;

[0010] The input end of the air relay is connected to the output end of the air pressure stabilizing valve and receives the pressure output from the output end of the sample pressure stabilizing valve;

[0011] The heat exchanger is internally provided with a heat exchange chamber and heat exchange tubes. One end of the heat exchange chamber is communicated with the output end of the air relay, and one end of the heat exchange tube is connected to the output end of the sample pressure stabilizing valve;

[0012] The mixing chamber is connected to the other ends of the heat exchange chamber and the heat exchange tubes, and the mixing chamber is connected to the conveying module.

[0013] Further, the mixing module further comprises: a sample flow limiting orifice, an air flow limiting orifice;

[0014] The sample flow limiting orifice is connected between the mixing chamber and the other end of the heat exchange tube;

[0015] The air flow limiting orifice is connected between the mixing chamber and the other end of the heat exchange chamber.

[0016] Further, the conveying module comprises: a conveying pipe, a sample inlet flowmeter, and a bypass flowmeter;

[0017] The input end of the delivery pipe is connected to the output end of the mixing module;

[0018] The input end of the sample injection flowmeter is connected to the output end of the delivery pipe;

[0019] The input end of the bypass flowmeter is connected to the output end of the delivery pipe, and the output end is connected to the reaction measurement module.

[0020] Furthermore, the reaction measurement module includes: an inlet flame arrester, a reaction furnace, an electric heating wire, a catalytic chamber, an oxygen sensor, and an outlet flame arrester;

[0021] The input end of the reaction furnace is connected to the delivery module through the inlet flame arrester;

[0022] The electric heating wire is arranged inside the reaction furnace;

[0023] The catalytic chamber is arranged inside the reaction furnace and is communicated with the inlet flame arrester;

[0024] The oxygen sensor is connected to the catalytic chamber and is used to detect the oxygen content in the catalytic chamber;

[0025] The outlet flame arrester is communicated with the catalytic chamber.

[0026] Furthermore, it further includes: a cooler, the cooler is communicated with the outlet flame arrester, and an exhaust port is arranged at the top of the cooler and a liquid discharge port is arranged at the bottom.

[0027] According to a special calorimeter measurement system according to an embodiment of the present invention, the sample gas and air are stabilized by the sampling bottom pressure stabilizing valve, ensuring that the pressures of the sample gas and air are consistent. Then, through a heat exchanger, etc., it ensures that the pressures and temperatures of the sample gas and air are consistent, ensuring the stability of the diluted mixed gas, rapid reaction, and more accurate measurement, thereby making the measurement result more stable and making the sample measurement more representative.

[0028] It should be understood that both the foregoing general description and the following detailed description are exemplary and are intended to provide further explanation of the claimed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic structural diagram of a special calorimeter measurement system according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] Hereinafter, with reference to the drawings, the preferred embodiments of the present invention will be described in detail to further illustrate the present invention.

[0031] First, in combination with Figure 1 A special calorimeter measurement system according to an embodiment of the present invention will be described, which is used for catalytic oxidation reaction measurement and has a wide range of application scenarios.

[0032] As Figure 1 shown, a special calorimeter measurement system according to an embodiment of the present utility model includes a mixing module, a conveying module, and a reaction measurement module;

[0033] Specifically, as Figure 1 shown, the mixing module is used to receive and mix the sample gas and air to obtain a continuous and stable mixed gas. The mixing module includes: a sample pressure stabilizing valve 11, an air pressure stabilizing valve 12, an air relay 13, a heat exchanger 14, and a mixing chamber 15; the input end of the sample pressure stabilizing valve 11 receives the sample gas; the input end of the air pressure stabilizing valve 12 receives the air; the input end of the air relay 13 is connected to the output end of the air pressure stabilizing valve 12 and receives the output pressure of the output end of the sample pressure stabilizing valve 11; the heat exchanger 14 is internally provided with a heat exchange chamber and a heat exchange tube, one end of the heat exchange chamber is communicated with the output end of the air relay 13, and one end of the heat exchange tube is connected to the output end of the sample pressure stabilizing valve 11; the mixing chamber 15 is connected to the other ends of the heat exchange chamber and the heat exchange tube, and the mixing chamber 15 is connected to the conveying module.

[0034] Specifically, as Figure 1 shown, the conveying module is connected to the mixing module and is used to vent most of the mixed gas and convey a small part of the mixed gas to the reaction measurement module. The conveying module includes: a conveying pipe 21, a sample inlet flowmeter 22, and a bypass flowmeter 23; the input end of the conveying pipe 21 is connected to the output end of the mixing module; the input end of the sample inlet flowmeter 22 is connected to the output end of the conveying pipe 21; the input end of the bypass flowmeter 23 is connected to the output end of the conveying pipe 21, and the output end is connected to the reaction measurement module.

[0035] Specifically, as Figure 1 shown, the reaction measurement module is connected to the conveying module and is used to receive a small part of the mixed gas conveyed by the conveying module, perform a catalytic oxidation reaction, and measure the oxygen content. The reaction measurement module includes: an inlet flame arrester 31, a reaction furnace 32, an electric heating wire 33, a catalytic chamber 34, an oxygen sensor 35, and an outlet flame arrester 36; the input end of the reaction furnace 32 is connected to the conveying module through the inlet flame arrester 31; the electric heating wire 33 is arranged in the reaction furnace 32; the catalytic chamber 34 is arranged in the reaction furnace 32 and is communicated with the inlet flame arrester 31; the oxygen sensor 35 is connected to the catalytic chamber 34 and is used to detect the oxygen content in the catalytic chamber 34; the outlet flame arrester 36 is communicated with the catalytic chamber 34.

[0036] Furthermore, as Figure 1 shown, the mixing module further includes: a sample flow limiting orifice 16 and an air flow limiting orifice 17. The sample flow limiting orifice 16 is connected between the mixing chamber 15 and the other end of the heat exchange tube; the air flow limiting orifice 17 is connected between the mixing chamber 15 and the other end of the heat exchange chamber.

[0037] Furthermore, as Figure 1As shown in the figure, a special calorimeter measurement system according to an embodiment of the present utility model further includes: a cooler 4, the cooler 4 is communicated with an outlet flame arrester 36, the top of the cooler 4 is provided with an exhaust port, and the bottom is provided with a liquid discharge port.

[0038] During use, the sample gas and air are first stabilized by a sample pressure stabilizing valve 11 and an air pressure stabilizing valve 12 respectively. In order to ensure that the sample gas and air pressures are consistent, an air relay 13 is used. The pressure balance reference point of the air relay 13 comes from behind the sample pressure stabilizing valve. In this way, the air pressure behind the air relay 13 can always be the same as the sample gas pressure. The air pressure will increase as the sample gas pressure increases and decrease as the sample gas pressure decreases. To ensure a constant dilution ratio of the sample gas and air, the sample gas and air temperatures also need to be the same. This function can be achieved through a heat exchanger 14. The sample gas in the heat exchanger 14 enters the sample gas flow limiting orifice at the tail through a heat exchange tube, while the air passes through the periphery of the heat exchange chamber to reach the tail air flow limiting orifice 17. Through the above measures, the air and sample gas reaching the mixing chamber 15 have the same pressure and temperature, ensuring the stability of the diluted mixed gas, and thus making the measurement result more stable. Only a small amount of the diluted mixed gas will enter the reaction furnace 32 through the sample flowmeter 22, and most of the mixed gas is safely discharged through the bypass flowmeter 23. The mixed gas adjusted by the sample flowmeter 22 enters the reaction furnace 32 through the inlet flame arrester 31. The electric heating wire 33 in the reaction furnace 32 heats the catalytic chamber 34 of the reaction furnace 32 to about 800 °C. The mixed gas undergoes a catalytic oxidation reaction under the action of a catalyst in the catalytic chamber 34. After the reaction, the oxygen concentration in the mixed gas will decrease. The higher the calorific value, the higher the organic matter concentration. The higher the organic matter concentration, the more oxygen in the mixed gas is consumed, and the less oxygen remains. Therefore, the remaining residual oxygen is inversely proportional to the calorific value.

[0039] Above, with reference to Figure 1 A special calorimeter measurement system according to an embodiment of the present utility model has been described. The sample gas and air are stabilized by the pressure stabilizing valves at the bottom of the sampler, ensuring that the sample gas and air have the same pressure. Then, through the heat exchanger 14 and others, it is ensured that the sample gas and air have the same pressure and temperature, ensuring the stability of the diluted mixed gas, with a rapid reaction and more accurate measurement, thus making the measurement result more stable and making the sample measurement more representative.

[0040] It should be noted that in this specification, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, the element defined by the statement "comprising..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0041] Although the content of the present utility model has been described in detail through the above preferred embodiments, it should be recognized that the above description should not be considered as a limitation to the present utility model. After those skilled in the art have read the above content, various modifications and substitutions to the present utility model will be obvious. Therefore, the protection scope of the present utility model shall be defined by the appended claims.

Claims

1. A special calorific value meter measurement system, characterized in that: Contains: mixing module, conveying module and reaction measurement module; The mixing module is used to receive and mix the sample gas and air to obtain a continuous and stable mixed gas; The delivery module is connected to the mixing module and is used to vent most of the mixed gas and deliver a small part of the mixed gas to the reaction measurement module; The reaction measurement module is connected to the delivery module, and is used to receive a small portion of the mixed gas delivered by the delivery module, perform a catalytic oxidation reaction, and measure the oxygen content.

2. The special calorific value meter measuring system as claimed in claim 1, characterized in that: The mixing module comprises: a sample pressure stabilizing valve, an air pressure stabilizing valve, an air relay, a heat exchanger and a mixing chamber; The input end of the sample pressure-stabilizing valve receives the sample gas; The input end of the air pressure stabilizing valve receives air; The input end of the air relay is connected to the output end of the air pressure stabilizing valve and receives the output pressure of the output end of the sample pressure stabilizing valve; A heat exchange chamber and a heat exchange tube are provided inside the heat exchanger, one end of the heat exchange chamber is connected to the output end of the air relay, and one end of the heat exchange tube is connected to the output end of the sample pressure-stabilizing valve; The mixing chamber is connected to the heat exchange cavity and the other end of the heat exchange tube, and the mixing chamber is connected to the conveying module.

3. The special calorific value meter measuring system as claimed in claim 2, characterized in that: The mixing module further comprises: a sample flow limiting hole and an air flow limiting hole; The sample flow restriction hole is connected between the mixing chamber and the other end of the heat exchange tube; The air flow restriction hole is connected between the mixing chamber and the other end of the heat exchange cavity.

4. The special calorific value meter measuring system as claimed in claim 1, characterized in that: The delivery module comprises: a delivery pipe, an injection flowmeter and a bypass flowmeter; The input end of the delivery pipe is connected to the output end of the mixing module; The input end of the sample injection flow meter is connected to the output end of the delivery pipe; The input end of the bypass flow meter is connected to the output end of the delivery pipe, and the output end is connected to the reaction measurement module.

5. The special calorific value meter measuring system as claimed in claim 1, characterized in that: The reaction measurement module comprises: an inlet flame arrester, a reaction furnace, an electric heating wire, a catalyst chamber, an oxygen sensor and an outlet flame arrester; The input end of the reactor is connected to the delivery module through the inlet flame arrester; The electric heating wire is arranged in the reaction furnace; The catalyst chamber is arranged in the reaction furnace and is in communication with the inlet flame arrester; The oxygen sensor is connected to the catalyst chamber and is used to detect the oxygen content in the catalyst chamber; The outlet flame arrester is in communication with the catalyst chamber.

6. The special calorific value meter measuring system as claimed in claim 5, characterized in that: It also includes: a cooler, which is communicated with the outlet flame arrester, and the top of the cooler is provided with an exhaust port, and the bottom is provided with a drain port.

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