Testing device for measuring combustion rate of injected pulverized coal under different oxygen concentration conditions

Abstract

The utility model discloses a testing device for measuring the combustion rate of injected pulverized coal under different oxygen concentration conditions, which relates to the technical field of metallurgy and comprises a gas mixing tank, an oxygen input device, a nitrogen input device and a combustion furnace, and the gas mixing tank is provided with a gas inlet and a gas outlet; the oxygen input device is communicated with the gas inlet so as to convey oxygen to the gas mixing tank, and the oxygen input device can control the input speed of the oxygen and can meter the oxygen input into the gas mixing tank; the nitrogen input device is communicated with the gas inlet so as to convey nitrogen to the gas mixing tank, and the nitrogen input device can control the input speed of the nitrogen and can meter the nitrogen input into the gas mixing tank; the combustion furnace is communicated with the gas outlet to receive the gas with the specific oxygen concentration after the oxygen and the nitrogen are mixed in the gas mixing tank, the combustion furnace can measure the combustion rate of the coal under the gas with the specific oxygen concentration, the structure is simple, use is convenient, and the optimal combustion rate of different coal under the appropriate oxygen enrichment rate condition can be found.

Description

Technical Field

[0001] The utility model relates to the technical field of metallurgy, in particular to a test device for measuring the combustion rate of pulverized coal injected under different oxygen concentration conditions. Background Technique

[0002] Due to reasons such as the price and environmental protection of coke, blast furnaces use more pulverized coal injection technology to replace coke. At the same time, pulverized coal injection can also provide a means of adjustment for blast furnaces to better ensure blast furnace production. The combustion rate of pulverized coal indicates the quality of pulverized coal combustion in the blast furnace. Pulverized coal with a high combustion rate has a high utilization rate and can better replace coke in the blast furnace. Generally, the existing pulverized coal combustion rate test devices can only measure the combustion of pulverized coal under air conditions. Now, blast furnace pulverized coal injection is mainly a mixture of bituminous coal and anthracite, and the technology of oxygen-enriched injection is also more used. Oxygen enrichment is helpful for the combustion of pulverized coal, and the improvement of the combustion rate of pulverized coal under different oxygen concentrations is different. In order to better understand the situation of oxygen-enriched injection, it is necessary to conduct a combustion rate test under oxygen-enriched conditions. This experimental equipment is used to test the combustion rate under different oxygen concentration conditions. Content of the Utility Model

[0003] The purpose of the utility model is to provide a test device for measuring the combustion rate of pulverized coal injected under different oxygen concentration conditions, so as to solve the problems existing in the above-mentioned prior art. The structure is simple and easy to use, and it can find the best combustion rate of different coal types under suitable oxygen enrichment rates.

[0004] To achieve the above purpose, the utility model provides the following scheme:

[0005] The utility model provides a test device for measuring the combustion rate of pulverized coal injected under different oxygen concentration conditions, including: a gas mixing tank, an oxygen input device, a nitrogen input device, and a combustion furnace. The gas mixing tank is provided with an air inlet and an air outlet; the oxygen input device is communicated with the air inlet to supply oxygen to the gas mixing tank, and the oxygen input device can control the oxygen input speed and can measure the oxygen input into the gas mixing tank; the nitrogen input device is communicated with the air inlet to supply nitrogen to the gas mixing tank, and the nitrogen input device can control the nitrogen input speed and can measure the nitrogen input into the gas mixing tank; the combustion furnace is communicated with the air outlet to receive the gas with a specific oxygen concentration after the oxygen and nitrogen are mixed in the gas mixing tank, and the combustion furnace can measure the combustion rate of the coal type under the gas with the specific oxygen concentration.

[0006] Preferably, it further includes a rigid tube, a rubber stopper, a three-way tube, a first flexible tube, and a second flexible tube. The rubber stopper is used for detachably and sealingly fixedly connecting to the air inlet. The first end of the rigid tube is used to pass through the rubber stopper and extend into the gas mixing tank and is sealingly fixedly connected to the rubber stopper. The second end of the rigid tube is connected and communicated with the first connection port of the three-way tube. One end of the first flexible tube is connected and communicated with the second connection port of the three-way tube, and the other end is connected and communicated with the oxygen input device. One end of the second flexible tube is connected and communicated with the third connection port of the three-way tube, and the other end is connected and communicated with the nitrogen input device.

[0007] Preferably, the air inlet is provided at the top of the gas mixing tank, and the first end of the rigid tube extends to a height position of 1 / 4 to 2 / 1 inside the gas mixing tank.

[0008] Preferably, the oxygen input device further includes a first flow meter, and the first flow meter is arranged on the first flexible tube to count the amount of oxygen passing through the first flexible tube.

[0009] Preferably, the nitrogen input device further includes a second flow meter, and the second flow meter is arranged on the second flexible tube to count the amount of nitrogen passing through the first flexible tube.

[0010] Preferably, the three-way tube is a Y-shaped three-way tube.

[0011] Preferably, it further includes a third flexible tube and a spray gun. One end of the third flexible tube is connected and communicated with the air outlet, and the other end is connected and communicated with the spray gun. The spray gun is used to spray gas into the combustion furnace.

[0012] Preferably, an air nozzle is provided at the air outlet of the gas mixing tank, and the air nozzle is used to be connected and communicated with the third flexible tube.

[0013] The present utility model has achieved the following technical effects compared with the prior art:

[0014] The present utility model provides a test device for measuring the combustion rate of pulverized coal blown under different oxygen concentration conditions. The oxygen input device and the nitrogen input device respectively transport oxygen and nitrogen to the gas mixing tank, so that a mixed gas with different oxygen concentrations can be mixed in the gas mixing tank. By measuring the combustion rate of each coal type and pulverized coal with different proportions under different oxygen concentration conditions, the optimal combustion rate of different coal types under suitable oxygen enrichment rate conditions can be found. It realizes broadening the types of blown coal, improving the utilization rate of pulverized coal, and achieving the purpose of reducing costs. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a schematic structural diagram of a test device for measuring the combustion rate of pulverized coal injection under different oxygen concentration conditions provided by the present invention;

[0017] In the figure: 1. Gas mixing tank; 2. Oxygen input device; 3. Nitrogen input device; 4. Combustion furnace; 5. Hard pipe; 6. Rubber stopper; 7. Three-way pipe; 8. First hose; 9. Second hose; 10. First flow meter; 11. Second flow meter; 12. Third hose; 13. Spray gun; 14. Air vent nozzle. Specific embodiments

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

[0019] The purpose of the present invention is to provide a test device for measuring the combustion rate of pulverized coal injection under different oxygen concentration conditions to solve the problems existing in the above-mentioned prior art. It has a simple structure and is convenient to use, and can find the best combustion rate of different coal types under suitable oxygen enrichment rate conditions.

[0020] To make the above-mentioned objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0021] The present invention provides a test device for measuring the combustion rate of pulverized coal injection under different oxygen concentration conditions, as Figure 1As shown in the figure, it includes: a gas mixing tank, an oxygen input device, a nitrogen input device, and a combustion furnace. The gas mixing tank is provided with an air inlet and an air outlet; the oxygen input device is connected to the air inlet to supply oxygen to the gas mixing tank, and the oxygen input device can control the input speed of oxygen and can measure the oxygen input into the gas mixing tank; the nitrogen input device is connected to the air inlet to supply nitrogen to the gas mixing tank, and the nitrogen input device can control the input speed of nitrogen and can measure the nitrogen input into the gas mixing tank; the combustion furnace is connected to the air outlet to receive the gas with a specific oxygen concentration after the oxygen and nitrogen are mixed in the gas mixing tank, and the combustion furnace can measure the combustion rate of coal types under the gas with the specific oxygen concentration. The oxygen input device and the nitrogen input device respectively supply oxygen and nitrogen to the gas mixing tank, so that different oxygen concentration mixed gases can be mixed in the gas mixing tank. By measuring the combustion rates of various coal types and different proportions of pulverized coal under different oxygen concentration conditions, the best combustion rate of different coal types under suitable oxygen enrichment rate conditions can be found. It realizes broadening the types of injected coal, improving the utilization rate of pulverized coal, and achieving the purpose of reducing costs.

[0022] In a preferred embodiment, the test device for measuring the combustion rate of injected pulverized coal under different oxygen concentration conditions further includes a hard pipe, a rubber stopper, a three-way pipe, a first hose, and a second hose. The rubber stopper is used to detachably and sealingly fixedly connect to the air inlet. The first end of the hard pipe is used to pass through the rubber stopper and extend into the gas mixing tank and is sealingly fixedly connected to the rubber stopper. The second end of the hard pipe is connected and communicated with the first connection port of the three-way pipe. One end of the first hose is connected and communicated with the second connection port of the three-way pipe, and the other end is connected and communicated with the oxygen input device. One end of the second hose is connected and communicated with the third connection port of the three-way pipe, and the other end is connected and communicated with the nitrogen input device. The structure is simple and convenient to use.

[0023] In a preferred embodiment, the air inlet is provided at the top of the gas mixing tank, and the first end of the hard pipe extends to a height position of 1 / 4 to 1 / 2 inside the gas mixing tank, which is convenient for the oxygen and nitrogen entering the gas mixing tank to be quickly mixed.

[0024] In a preferred embodiment, the oxygen input device further includes a first flow meter. The first flow meter is arranged on the first hose to count the amount of oxygen passing through the first hose, measure the amount of oxygen introduced into the gas mixing tank, and facilitate calculating the concentration of oxygen.

[0025] In a preferred embodiment, the nitrogen input device further includes a second flow meter, which is arranged on the second hose to count the amount of nitrogen passing through the first hose, measure the amount of nitrogen introduced into the gas mixing tank, and facilitate the calculation of the nitrogen concentration.

[0026] In a preferred embodiment, the tee is a Y-shaped tee, with a simple structure. The directions of the second connection port, the third connection port, and the first connection port are substantially the same, avoiding affecting the gas transmission.

[0027] In a preferred embodiment, the pulverized coal injection combustion rate test device for measuring under different oxygen concentration conditions further includes a third hose and a spray gun. One end of the third hose is connected and communicated with the air outlet, and the other end is connected and communicated with the spray gun. The spray gun is used to spray gas into the combustion furnace, with a simple structure and convenient use.

[0028] In a preferred embodiment, an air vent is arranged at the air outlet of the gas mixing tank. The air vent is used to be connected and communicated with the third hose, with a simple structure and convenient use.

[0029] Specific examples are applied in the present utility model to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A test device for measuring the combustion rate of pulverized coal injection under different oxygen concentration conditions, characterized in that: include: A gas mixing tank, wherein the gas mixing tank is provided with an air inlet and an air outlet; An oxygen input device, the oxygen input device is connected to the air inlet to deliver oxygen to the gas mixing tank, and the oxygen input device can control the oxygen input speed and can measure the oxygen input to the gas mixing tank; A nitrogen input device, the nitrogen input device is connected to the gas inlet to deliver nitrogen to the gas mixing tank, and the nitrogen input device can control the nitrogen input speed and can measure the nitrogen input to the gas mixing tank; as well as A combustion furnace is connected to the gas outlet to receive the gas with a specific oxygen concentration after the oxygen and the nitrogen are mixed in the gas mixing tank, and the combustion furnace can measure the combustion rate of the coal type under the gas with the specific oxygen concentration.

2. The test device for measuring the combustion rate of pulverized coal injection under different oxygen concentration conditions according to claim 1 is characterized in that: It also includes a hard tube, a rubber plug, a three-way pipe, a first hose and a second hose, the rubber plug is used to be detachably and sealedly fixedly connected to the air inlet, the first end of the hard tube is used to pass through the rubber plug and extend into the gas mixing tank and be sealed and fixedly connected to the rubber plug, the second end of the hard tube is connected to and communicated with the first connecting port of the three-way pipe, one end of the first hose is connected to and communicated with the second connecting port of the three-way pipe, and the other end is connected to and communicated with the oxygen input device, one end of the second hose is connected to and communicated with the third connecting port of the three-way pipe, and the other end is connected to and communicated with the nitrogen input device.

3. The test device for measuring the combustion rate of pulverized coal injection under different oxygen concentration conditions according to claim 2 is characterized in that: The air inlet is provided with the top of the gas mixing tank, and the first end of the hard tube extends into the gas mixing tank to a height position of 1 / 4 to 2 / 1.

4. The test device for measuring the combustion rate of pulverized coal injection under different oxygen concentration conditions according to claim 3 is characterized in that: The oxygen input device further includes a first flow meter, which is disposed on the first hose to count the amount of oxygen passing through the first hose.

5. The test device for measuring the combustion rate of pulverized coal injection under different oxygen concentration conditions according to claim 4 is characterized in that: The nitrogen input device further includes a second flow meter, which is disposed on the second hose to count the amount of nitrogen passing through the first hose.

6. The test device for measuring the combustion rate of pulverized coal injection under different oxygen concentration conditions according to claim 2, characterized in that: The three-way pipe is a Y-shaped three-way pipe.

7. The test device for measuring the combustion rate of pulverized coal injection under different oxygen concentration conditions according to claim 1 is characterized in that: It also includes a third hose and a spray gun, one end of the third hose is connected and communicated with the gas outlet, and the other end is connected and communicated with the spray gun, and the spray gun is used to spray gas into the combustion furnace.

8. The test device for measuring the combustion rate of pulverized coal injection under different oxygen concentration conditions according to claim 7, characterized in that: A vent nozzle is provided at the gas outlet of the gas mixing tank, and the vent nozzle is used to be connected and communicated with the third hose.

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