A test furnace for verifying the overall thermal shock resistance of refractory materials under actual working conditions

Abstract

This utility model belongs to the field of testing furnace technology, and relates to a test furnace for verifying the overall thermal shock performance of refractory materials under actual working conditions. It has a burner; a natural gas pipeline, an air pipeline, a combustion chamber, and a hot air pipeline are connected to the burner; a left-side test pipeline and a right-side test pipeline are connected to the left and right sides of the combustion chamber and hot air pipeline; the front ends of the combustion chamber and hot air pipeline are connected to the exhaust pipeline through a middle gate valve; both the left-side and right-side test pipelines are composed of multiple refractory material test units connected in series. This utility model verifies the overall thermal shock performance of the refractory material by constructing refractory material on a section of pipeline, connecting multiple pipelines of the same or different refractory materials in series, alternately passing hot and cold air a certain number of times, and then replacing one section to observe internal cracking, spalling, etc.

Description

Technical Field

[0001] This utility model belongs to the field of testing furnace technology, specifically relating to a test furnace for verifying the overall thermal shock performance of refractory materials under actual working conditions. Background Technology

[0002] The thermal shock resistance of refractory materials is their ability to resist damage caused by drastic temperature changes, and it is the key factor determining their service life. Currently, most thermal shock testing devices use clamps to fix the sample, heat it, and then cool it with water or air. However, in the working environment, refractory materials will not be allowed to directly contact water for cooling at high temperatures, and air cooling is also inconsistent with actual conditions. Moreover, this method can only observe the cracking of the refractory material, and cannot accurately analyze the overall stability and spalling. Therefore, there is an urgent need for a test furnace that can simulate actual working conditions as realistically as possible to verify and solve the above problems. Utility Model Content

[0003] In order to solve the above-mentioned technical problems, this utility model provides a test furnace for verifying the overall thermal shock performance of refractory materials under actual working conditions.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: A test furnace for verifying the overall thermal shock performance of refractory materials under actual working conditions includes a burner; a natural gas pipeline and an air pipeline connected to the burner; a combustion chamber and a hot air pipeline connected to the burner; a left test pipeline and a right test pipeline connected to the left and right sides of the combustion chamber and hot air pipeline, respectively; the left test pipeline is connected to the combustion chamber and hot air pipeline via a tee and a left-side gate valve; the right test pipeline is connected to the combustion chamber and hot air pipeline via a tee and a right-side gate valve; the front end of the combustion chamber and hot air pipeline is connected to an exhaust pipe via a middle gate valve; both the left and right test pipelines consist of multiple refractory material test units connected in series, with adjacent test units connected by flanges; the test furnace also includes a cold air duct for providing cold air to the left and right test pipelines; the cold air duct is connected to the left and right test pipelines via corresponding tee connections.

[0005] The aforementioned cold air duct is a T-shaped structure composed of a longitudinal duct and a transverse duct, wherein both ends of the transverse duct are bent upwards and connected to their respective tees.

[0006] The burner used is a natural gas burner, and qualified products are purchased from the market.

[0007] The natural gas pipeline is equipped with pressure gauges, flow meters, valves, and corresponding reducing pipes, and the pipeline is connected to the burner flange.

[0008] The air duct is equipped with a pressure gauge, flow meter, valves, combustion fan, and corresponding reducer pipes, and the duct is connected to the burner flange.

[0009] The combustion chamber and hot air duct are equipped with slide gate valves, thermocouples, and tees connecting to the cold air duct. The hot air duct is supported by pipe supports, column brackets, etc. The three slide gate valves on the hot air duct control the flow direction of the hot flue gas.

[0010] The cold air duct is equipped with valves and a blower, and is supported by pipe supports and column brackets.

[0011] The test pipeline consists of multiple test units connected in series, with adjacent test units connected by flanges; the test units can be configured with different refractory materials as needed.

[0012] The exhaust duct is connected to the last unit of the test ducts on both sides and the last flange of the hot air duct.

[0013] This utility model proposes a test furnace for verifying the overall thermal shock performance of refractory materials under actual working conditions. Its structural design is simple and reasonable and easy to use. By building refractory materials on a section of pipe, and then connecting multiple pipes of the same or different refractory materials in series, and alternating hot air and cold air a certain number of times, one section is replaced, and the internal cracking, spalling and other conditions are observed, thereby verifying the overall thermal shock performance of the refractory material. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall principle of this utility model.

[0015] Figure 2 This is a schematic diagram of a cold air duct.

[0016] In the diagram: 1-burner, 2-natural gas pipeline, 3-air pipeline, 4-combustion chamber and hot air pipeline, 41-left side gate valve, 42-right side gate valve, 43-middle gate valve, 44-thermocouple, 45-teet, 5-cold air pipeline, 51-left side cold air pipeline valve, 52-right side cold air pipeline valve, 61-left side test pipeline, 62-right side test pipeline. Detailed Implementation

[0017] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings: like Figure 1 , Figure 2As shown, a test furnace for verifying the overall thermal shock performance of refractory materials under actual working conditions is provided. The test furnace has a burner 1; a natural gas pipeline 2 and an air pipeline 3 are provided and connected to the burner 1; the test furnace is also provided with a combustion chamber and a hot air pipeline 4; the combustion chamber and the hot air pipeline 4 are connected to the burner 1; a left test pipeline 61 and a right test pipeline 62 are connected to the left and right sides of the combustion chamber and the hot air pipeline 4; the left test pipeline 61 is connected to the combustion chamber and the hot air pipeline 4 through a tee and a left-side gate valve 41; the right test pipeline 62... The duct 62 is connected to the combustion chamber and hot air duct 4 via a tee and a right-side gate valve 42; the front end of the combustion chamber and hot air duct 4 is connected to the exhaust duct via a middle gate valve 46; the left-side test duct 61 and the right-side test duct 62 are both composed of multiple refractory material test units connected in series, and adjacent refractory material test units are connected by flanges; the test furnace is also equipped with a cold air duct for providing cold air to the left-side test duct and the right-side test duct; the cold air duct is connected to the left-side test duct and the right-side test duct respectively via the corresponding tee.

[0018] The aforementioned cold air duct is a T-shaped structure composed of a longitudinal duct and a transverse duct, wherein both ends of the transverse duct are bent upwards and connected to their respective tees.

[0019] The burner used is a natural gas burner, and qualified products are purchased from the market.

[0020] The natural gas pipeline is equipped with pressure gauges, flow meters, valves, and corresponding reducing pipes, and the pipeline is connected to the burner flange.

[0021] The air duct is equipped with a pressure gauge, flow meter, valves, combustion fan, and corresponding reducer pipes, and the duct is connected to the burner flange.

[0022] The combustion chamber and hot air duct are equipped with slide gate valves, thermocouples, and tees connecting to the cold air duct. The hot air duct is supported by pipe supports, column brackets, etc. The three slide gate valves on the hot air duct control the flow direction of the hot flue gas.

[0023] The cold air duct is equipped with valves and a blower, and is supported by pipe supports, column brackets, etc.

[0024] The test pipeline consists of multiple test units connected in series, with adjacent test units connected by flanges; the test units can be configured with different refractory materials as needed.

[0025] The exhaust duct is connected to the last unit of the test ducts on both sides and the last flange of the hot air duct.

[0026] First, close all valves, and open the valves of natural gas pipeline 2, air pipeline 3, and the gate valve directly connected to the flue gas exhaust pipe. Gas is supplied to burner 1 via natural gas pipeline 2, and combustion air is supplied to burner 1 via air pipeline 3. Adjust the valve openings according to the pressure gauges and flow meters on natural gas pipeline 2 and air pipeline 3 to achieve complete combustion of natural gas and generate high-temperature flue gas. After the temperature displayed by thermocouple 44 reaches the test operating temperature, first open the gate valve 41 of the left test pipeline and close the gate valve 43 directly connected to the flue gas exhaust pipe, allowing the high-temperature flue gas to flow through the left test pipeline 61 to the flue gas exhaust pipe connected to the last unit of the test pipeline. After a period of time, open the gate valve 42 of the right test pipeline 62 and close the gate valve 41 of the left test pipeline, allowing the high-temperature flue gas to flow through the right test pipeline 62. Simultaneously, open valve 51 on the left cold air pipeline, allowing cold air to flow through the cold air pipeline and tee 4. 5. The gas flows through the left-side test pipe 61 and the exhaust pipe, completing the first thermal shock test of the left-side test pipe 61. After a period of time, the valve 51 on the left-side cold air pipe is closed, and the gate valve 41 on the left-side test pipe is opened, allowing the high-temperature flue gas to pass through the left-side test pipe 61. At the same time, the gate valve 42 on the right-side test pipe is closed, and the valve 52 on the right-side cold air pipe is opened, allowing the cold air to flow through the cold air pipe and the tee 45, through the right-side test pipe 62 and the exhaust pipe, completing the first thermal shock test of the right-side test pipe 62. This process is repeated until the required number of thermal shock cycles is reached. After one side of the test pipe cools down, several test units can be replaced, and the number of thermal shock cycles can be recorded again for efficient and continuous testing. Different refractory material configuration schemes can be selected for the test units as needed.

Claims

1. A test furnace for verifying the overall thermal shock resistance of refractory materials under actual working conditions, characterized in that: The test furnace has a burner; a natural gas pipeline and an air pipeline are connected to the burner; the test furnace also has a combustion chamber and a hot air pipeline; the combustion chamber and the hot air pipeline are connected to the burner; a left test pipeline and a right test pipeline are respectively connected to the left and right sides of the combustion chamber and the hot air pipeline; the left test pipeline is connected to the combustion chamber and the hot air pipeline through a tee and a left-side gate valve; the right test pipeline is connected to the combustion chamber and the hot air pipeline through a tee and a right-side gate valve; the front end of the combustion chamber and the hot air pipeline is connected to the exhaust pipe through a middle gate valve; both the left and right test pipelines are composed of multiple refractory material test units connected in series, and adjacent refractory material test units are connected by flanges; the test furnace also has a cold air duct for providing cold air to the left and right test pipelines; the cold air duct is connected to the left and right test pipelines through corresponding tees.

2. The test furnace for verifying the overall thermal shock performance of refractory materials under actual working conditions as described in claim 1, characterized in that: The aforementioned cold air duct is a T-shaped structure composed of a longitudinal duct and a transverse duct, wherein both ends of the transverse duct are bent upwards and connected to their respective tees.

3. The test furnace for verifying the overall thermal shock performance of refractory materials under actual working conditions as described in claim 1, characterized in that: The combustion chamber and hot air duct are equipped with gate valves, thermocouples, and tees that connect to the cold air duct. The three gate valves on the hot air duct control the flow direction of the hot flue gas.

4. The test furnace for verifying the overall thermal shock performance of refractory materials under actual working conditions as described in claim 1, characterized in that: The exhaust duct is connected to the last unit of the test ducts on both sides and the last flange of the hot air duct.

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