Gas distribution mechanism of hot regeneration roasting furnace

Abstract

The utility model relates to the technical field of roasting furnaces, in particular to a gas distribution mechanism of a hot regeneration roasting furnace, which comprises a shell, a waste gas pipeline and a gas distribution pipeline, the middle end of the left side of the shell is fixedly connected with the waste gas pipeline, the middle end of the waste gas pipeline is fixedly connected with a filter block, and the inside of the filter block is fixedly connected with a first filter screen; the inner side of the waste gas pipeline is fixedly connected with a one-way valve, the right end of the waste gas pipeline is fixedly connected with a first sucking pump, the upper end of the shell is fixedly connected with a waste gas treatment cavity, and the interior of the waste gas treatment cavity is fixedly connected with a sponge net. Then the oxygen-containing gas is mixed with air and then is conveyed into the furnace through the gas distribution hole, and meanwhile, the oxygen-containing gas is in full contact with the stirred waste sand through the gas outlet hole in the stirring rod, so that gas distribution is uniform, all the waste sand is fully combusted, and the combustion efficiency of the waste sand is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of roasting furnaces, in particular to a gas distribution mechanism of a thermal regeneration roasting furnace. Background Art

[0002] The thermal regeneration process of foundry waste sand is a thermochemical reaction process. Its basic principle is to use the heat generated by the combustion of burner fuel in an aerobic environment to increase the ambient temperature in the roasting furnace and keep it above the ignition point of organic matter or carbon contained in the foundry waste sand, causing the foundry waste sand system to spontaneously combust, thereby removing organic matter or carbon and other substances in the foundry waste sand and achieving the purpose of recycling the foundry waste sand.

[0003] How to effectively provide oxygen-containing air into the roasting furnace is one of the key factors determining the regeneration quality of foundry waste sand, and is also one of the key factors determining energy saving and emission reduction of thermal regeneration. The common gas supply and distribution mechanism has only one air inlet, and the oxygen-containing gas is unevenly distributed. The waste sand near the air inlet burns fully, but the waste sand far from the air inlet burns incompletely, and the waste sand combustion efficiency is not high. Therefore, a gas distribution structure for a thermal regeneration roasting furnace is proposed to address the above problems. Utility Model Content

[0004] The utility model aims to provide a gas distribution mechanism for a thermal regeneration roasting furnace to solve the problems of uneven gas distribution and low waste sand combustion efficiency in common roasting furnace gas distribution mechanisms.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A gas distribution mechanism of a thermal regeneration roasting furnace comprises a shell, an exhaust gas pipeline and an air distribution pipeline, wherein the middle end of the left side of the shell is fixedly connected to the exhaust gas pipeline, the middle end of the exhaust gas pipeline is fixedly connected to a filter block, a first filter screen is fixedly connected inside the filter block, a one-way valve is fixedly connected inside the exhaust gas pipeline, a first air pump is fixedly connected to the right end of the exhaust gas pipeline, an exhaust gas treatment chamber is fixedly connected to the upper end of the shell, a sponge net is fixedly connected inside the exhaust gas treatment chamber, an adsorption block is fixedly connected inside the exhaust gas treatment chamber, a second air pump is fixedly connected to the upper end of the shell, an exhaust pipe is fixedly connected to the upper end of the second air pump, a motor is fixedly connected to the upper end of the shell, a connecting rod is fixedly connected to the lower end of the motor, a stirring rod is fixedly connected to the lower end of the connecting rod, an air outlet is provided on the outer side of the stirring rod, a second filter screen is fixedly connected inside the air outlet, an air inlet is provided on the upper end of the connecting rod, an air distribution pipeline is provided inside the shell, a pressure valve is provided inside the air distribution pipeline, and an air distribution hole is provided on the outer side of the air distribution pipeline.

[0007] Preferably, the connecting rod is in the shape of a hollow cylinder, and the air inlet hole formed at the upper end of the connecting rod is communicated with the gas distribution pipeline.

[0008] Preferably, the stirring rod is in the shape of a hollow cylinder, there are three stirring rods, and the cavity inside the stirring rod is communicated with the cavity inside the connecting rod.

[0009] Preferably, a pipeline is fixedly connected between the first air pump and the exhaust gas treatment chamber, and a pipeline is fixedly connected between the exhaust gas treatment chamber and the second air pump.

[0010] Preferably, the area of ​​the first filter screen is larger than the area of ​​the cross section of the exhaust gas pipe, and the cross section of the first filter screen is circular.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] In the utility model, by means of the waste gas pipeline, waste gas treatment chamber, connecting rod, stirring rod and gas distribution pipeline, the waste gas in the furnace is extracted for treatment during the operation of the roasting furnace, and then mixed with air and introduced into the furnace through the gas distribution hole. At the same time, the oxygen-containing gas is fully contacted with the stirred waste sand through the gas outlet hole on the stirring rod, so that the gas distribution is uniform, and then all the waste sand is fully burned, thereby improving the combustion efficiency of the waste sand. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 For this utility model Figure 1 A schematic diagram of the structure at A;

[0015] Figure 3 For this utility model Figure 1 Schematic diagram of the structure at B;

[0016] Figure 4 For this utility model Figure 1 Schematic diagram of the structure at C;

[0017] Figure 5 For this utility model Figure 1 Schematic diagram of the structure at D;

[0018] Figure 6 This is a schematic diagram of the top view of the stirring rod of the utility model;

[0019] Figure 7 This is a schematic diagram of the filter block structure of the utility model.

[0020] In the figure: 1-shell, 2-exhaust pipe, 3-filter block, 4-first filter screen, 5-check valve, 6-first air pump, 7-exhaust treatment chamber, 8-sponge net, 9-adsorption block, 10-second air pump, 11-exhaust pipe, 12-motor, 13-connecting rod, 14-stirring rod, 15-air outlet, 16-second filter screen, 17-air inlet, 18-gas distribution pipe, 19-pressure valve, 20-gas distribution hole. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0022] See also Figure 1-7 , the utility model provides a technical solution:

[0023] A gas distribution mechanism of a thermal regeneration roasting furnace comprises a shell 1, an exhaust gas pipeline 2 and an air distribution pipeline 18, wherein the exhaust gas pipeline 2 is fixedly connected to the middle end of the left side of the shell 1, a filter block 3 is fixedly connected to the middle end of the exhaust gas pipeline 2, a first filter screen 4 is fixedly connected to the inside of the filter block 3, a one-way valve 5 is fixedly connected to the inside of the exhaust gas pipeline 2, a first air pump 6 is fixedly connected to the right end of the exhaust gas pipeline 2, an exhaust gas treatment chamber 7 is fixedly connected to the upper end of the shell 1, a sponge net 8 is fixedly connected to the inside of the exhaust gas treatment chamber 7, an adsorption block 9 is fixedly connected to the inside of the exhaust gas treatment chamber 7, and an exhaust gas treatment chamber 7 is fixedly connected to the upper end of the shell 2. A second air pump 10 is fixedly connected, and an air extraction pipeline 11 is fixedly connected to the upper end of the second air pump 10. A motor 12 is fixedly connected to the upper end of the shell 1, and a connecting rod 13 is fixedly connected to the lower end of the motor 12. A stirring rod 14 is fixedly connected to the lower end of the connecting rod 13. An air outlet 15 is provided on the outer side of the stirring rod 14, and a second filter 16 is fixedly connected to the inside of the air outlet 15. An air inlet 17 is provided on the upper end of the connecting rod 13. An air distribution pipeline 18 is provided inside the shell 1, and a pressure valve 19 is provided inside the air distribution pipeline 18. An air distribution hole 20 is provided on the outer side of the air distribution pipeline 18.

[0024] The connecting rod 13 is in the shape of a hollow cylinder. The air inlet 17 at the upper end of the connecting rod 13 is connected to the air distribution pipe 18, so that the oxygen-containing air can enter the cavity of the connecting rod 13. The stirring rod 14 is in the shape of a hollow cylinder. There are three stirring rods 14. The cavity inside the stirring rod 14 is connected to the cavity inside the connecting rod 13. The oxygen-containing air will pass through the cavity of the connecting rod 13 and then be discharged from the air outlet 15 of the stirring rod 14. The oxygen-containing air can fully contact the waste sand, so that the waste sand is filled with oxygen. The exhaust gas treatment chamber 7 is fixedly connected with a pipeline, and the exhaust gas treatment chamber 7 is fixedly connected with a pipeline. The independent first exhaust pump 6, the exhaust gas treatment chamber 7 and the second exhaust pump 10 are connected by the pipeline to facilitate the transportation of gas. The area of ​​the first filter screen 4 is larger than the cross-sectional area of ​​the exhaust gas pipe 2. The cross-sectional shape of the first filter screen 4 is circular, which can effectively block larger solid particles in the exhaust gas outside the exhaust gas pipe 2 to avoid the exhaust gas pipe 2 being blocked.

[0025] Working process: the first vacuum pump 6 at the left end of the shell 1 extracts the exhaust gas in the roasting furnace through the exhaust gas pipe 2. The exhaust gas in the furnace passes through the one-way valve 5 to the filter block 3 and is filtered through the first filter screen 4. The filter block 3 is fixed at the middle end of the exhaust gas pipe 2, and the filter screen 4 is fixed inside the filter block 3. When the filter screen 4 needs to be replaced, the screws connecting the filter screen 4 and the filter block 3 are directly removed, and the filter screen 4 is pulled out from the filter block 3 for replacement. Then the exhaust gas passes through the pipeline to the exhaust gas treatment chamber 7 at the upper end of the shell 1. The gas molecules are dispersed through the sponge net 8 to better contact with the adsorption block 9 and other gas molecules are adsorbed. The second vacuum pump 10 draws the outside air into the exhaust gas treatment chamber 7 through the exhaust pipe 11 to mix with the treated exhaust gas. When the gas content in the exhaust gas treatment chamber 7 reaches a certain level Finally, under the action of gas pressure, the pressure valve 19 is pressed downward to make the gas distribution pipeline 18 unblocked, and the gas can be input into the gas distribution pipeline 18. Part of the gas enters the furnace from the gas distribution hole 20, and part of the gas enters the cavity of the connecting rod 13 and the stirring rod 14 through the air inlet hole 17. The motor 12 is started, and the motor 12 drives the connecting rod 13 and the stirring rod 14 to rotate. The stirring rod 14 will stir the waste sand. During the stirring, the gas will be discharged from the air outlet 15 on the stirring rod 14. At this time, the oxygen-containing gas will fully contact the inside of the waste sand stirred by the stirring rod 14, so that the waste sand that is not fully burned at ordinary times can be fully burned. The second filter 16 is arranged inside the air outlet 15 to prevent the waste sand from entering the inside of the stirring rod 14 through the air outlet 15 and blocking the air outlet 15. The above working process improves the combustion efficiency of the waste sand.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas distribution mechanism for a thermal regeneration roasting furnace, comprising a shell (1), an exhaust gas pipeline (2) and a gas distribution pipeline (18), Features: The left middle end of the shell (1) is fixedly connected to an exhaust pipe (2), the middle end of the exhaust pipe (2) is fixedly connected to a filter block (3), the inside of the filter block (3) is fixedly connected to a first filter screen (4), the inside of the exhaust pipe (2) is fixedly connected to a one-way valve (5), the right end of the exhaust pipe (2) is fixedly connected to a first air pump (6), the upper end of the shell (1) is fixedly connected to an exhaust gas treatment chamber (7), the inside of the exhaust gas treatment chamber (7) is fixedly connected to a sponge net (8), the inside of the exhaust gas treatment chamber (7) is fixedly connected to an adsorption block (9), the upper end of the shell (1) is fixedly connected to a second air pump (10), the second air pump ( 10) is fixedly connected to an exhaust pipe (11) at the upper end, the shell (1) is fixedly connected to a motor (12) at the upper end, the motor (12) is fixedly connected to a connecting rod (13) at the lower end, the connecting rod (13) is fixedly connected to a stirring rod (14) at the lower end, an air outlet (15) is provided on the outer side of the stirring rod (14), a second filter (16) is fixedly connected inside the air outlet (15), an air inlet (17) is provided on the upper end of the connecting rod (13), an air distribution pipe (18) is provided inside the shell (1), a pressure valve (19) is provided inside the air distribution pipe (18), and an air distribution hole (20) is provided on the outer side of the air distribution pipe (18).

2. The gas distribution mechanism of a thermal regeneration roasting furnace according to claim 1, Features: The connecting rod (13) is in the shape of a hollow cylinder, and an air inlet hole (17) provided at the upper end of the connecting rod (13) is communicated with a gas distribution pipeline (18).

3. The gas distribution mechanism of a thermal regeneration roasting furnace according to claim 1, Features: The stirring rod (14) is in the shape of a hollow cylinder. There are three stirring rods (14). The cavity inside the stirring rod (14) is communicated with the cavity inside the connecting rod (13).

4. The gas distribution mechanism of a thermal regeneration roasting furnace according to claim 1, Features: A pipeline is fixedly connected between the first air pump (6) and the waste gas treatment chamber (7), and a pipeline is fixedly connected between the waste gas treatment chamber (7) and the second air pump (10).

5. The gas distribution mechanism of a thermal regeneration roasting furnace according to claim 1, Features: The area of ​​the first filter screen (4) is larger than the area of ​​the cross section of the exhaust gas pipe (2), and the cross section of the first filter screen (4) is circular.

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