Accurate ammonia spraying grating device for glass production

Abstract

The utility model provides a precise ammonia spraying grating device for glass production, which relates to the technical field of denitration devices and comprises a flue gas channel, a plurality of composite pipes and an ammonia gas supply pipe, the composite pipes are arranged in the flue gas channel in parallel, each composite pipe comprises an ammonia gas conveying pipe coaxially arranged in the detection pipe, the inlet end of each ammonia gas conveying pipe is connected with the ammonia gas supply pipe, a flow regulating valve is further arranged at the inlet end of each ammonia gas conveying pipe, an ammonia spraying pipe penetrating through the detection pipe is arranged on each ammonia gas conveying pipe, and the detection probe is connected with the flow regulating valve. Wherein the flow regulating valve can detect the smoke concentration of the position where the flow regulating valve is located through the detection probe, and the flow of ammonia gas in the ammonia gas conveying pipe where the flow regulating valve is located is controlled through the flow regulating valve according to the concentration, so that the flow of the ammonia gas passing through different positions in the flue gas channel is controlled, and ammonia spraying openings in all positions of the ammonia spraying grating device spray ammonia accurately; the injected ammonia gas is matched with the actual requirements of each part of the flue gas channel, the denitration effect of the SCR device is improved, and the waste of the ammonia gas is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of denitration devices, in particular to a precise ammonia spraying grid device for glass production. Background Art

[0002] Glass production is usually carried out through the float glass production process, which produces a large amount of smoke and dust, and the smoke and dust contain a large amount of NOx (nitrogen oxides). Direct discharge of the smoke and dust will cause serious air pollution. Therefore, a denitrification system is required in glass production to denitrify the glass production smoke and dust. Generally speaking, an SCR device (Selective Catalytic Reduction device) needs to be equipped with an ammonia injection grid, which is arranged in the flue gas channel of the SCR device. The ammonia injection grid is used to spray ammonia into the flue gas channel to mix the ammonia with the smoke, so that the ammonia and the NOx in the smoke react under high temperature conditions (the smoke temperature range is generally between 300-400℃) and the action of a catalyst to achieve the purpose of removing NOx from the smoke.

[0003] The ammonia injection flow rate of the ammonia injection grid equipped with the existing SCR device is usually kept constant. However, when the speed of smoke generation in the glass production process will fluctuate greatly, the ammonia injection flow rate of the existing ammonia injection grid is difficult to change with the flow rate in the smoke channel. Therefore, it is difficult for the existing ammonia injection grid to spray ammonia and the amount required for smoke removal to keep pace in real time. Excessive ammonia flow rate of the ammonia injection grid will cause ammonia waste, while too small ammonia flow rate of the ammonia injection grid will make NOx unable to be completely removed, resulting in poor denitrification effect of the SCR device. Utility Model Content

[0004] In view of this, in order to automatically adjust the ammonia spray flow rate of the grid device of the SCR device, ensure that the ammonia spray flow rate of the grid device matches the actual demand, improve the denitrification effect of the SCR device, and reduce the waste of ammonia. The utility model provides a precise ammonia spray grid device for glass production, a flue gas channel, multiple composite pipes, and an ammonia supply pipe;

[0005] All the composite tubes are arranged in parallel in the smoke channel, and one end of each composite tube passes through the side wall of the smoke channel and extends outside the smoke channel;

[0006] Each composite tube includes a detection tube and an ammonia gas delivery tube disposed within the detection tube. The inlet end of the ammonia gas delivery tube extends to the detection tube and is connected to the ammonia gas supply tube. A flow regulating valve is also provided on the inlet end of the ammonia gas delivery tube. The flow regulating valve has a built-in controller for controlling flow regulation of the flow regulating valve.

[0007] The detection tube is provided with a plurality of detection probes and an ammonia injection pipe. The detection probe is connected to a controller on the same composite tube as the detection probe. The ammonia injection pipe passes through the detection tube and is connected to the ammonia delivery pipe. The end of the ammonia injection pipe located outside the detection tube is an ammonia injection port.

[0008] Furthermore, the detection probes are connected to the controller via connecting wires, and the connecting wires are located in a receiving cavity between the outer wall of the detection tube and the inner wall of the ammonia delivery tube.

[0009] Furthermore, each of the ammonia injection ports is connected to an ammonia injection head, and a plurality of ammonia injection holes are distributed on the ammonia injection head.

[0010] Furthermore, each detection tube is provided with a plurality of mounting tubes, the mounting tubes pass through the detection tubes, the inner walls of the mounting tubes are provided with connecting internal threads, the detection probes are provided with connecting external threads, and the detection probes are connected to the mounting tubes via the external threads.

[0011] Furthermore, the detection probe is located below the detection tube, and the ammonia injection port is located above the detection tube.

[0012] Furthermore, a plurality of mounting seats are provided inside the smoke channel, and a circular limiting groove is provided on the mounting seat, and the end portion of the detection tube located inside the smoke channel is limited in the limiting groove.

[0013] Furthermore, a mounting hole is provided on the side wall of the smoke channel, and the detection tube extends from the mounting hole to the outside of the smoke channel.

[0014] Furthermore, a sealing assembly is provided in the mounting hole, and the sealing assembly seals the gap between the mounting hole and the detection tube.

[0015] Furthermore, the sealing assembly includes a sealing sleeve, a sealing ring and an annular sealing pressure plate. The sealing sleeve is embedded in the gap between the mounting hole and the detection tube. The sealing ring is connected to the end of the sealing sleeve. The sealing ring and the sealing pressure plate are both sleeved on the outside of the detection tube. The sealing pressure plate is connected to the outer wall of the flue gas channel by screws, and the sealing pressure plate presses the sealing ring.

[0016] Furthermore, the sealing sleeve and the sealing ring are an integrated structure, and both the sealing sleeve and the sealing ring are made of rubber.

[0017] The utility model discloses a precise ammonia spraying grid device for glass production, the beneficial effects are as follows: the grid device comprises a flue gas channel and a plurality of composite pipes and an ammonia supply pipe; wherein all the composite pipes are arranged in parallel in the flue gas channel, the composite pipe comprises an ammonia delivery pipe coaxially arranged in the detection pipe, the inlet end of the ammonia delivery pipe is connected to the ammonia supply pipe, the inlet end of the ammonia delivery pipe is also provided with a flow regulating valve, the ammonia delivery pipe is provided with an ammonia spraying pipe passing through the detection pipe, the detection probe is connected to the flow regulating valve, wherein the flow regulating valve can detect the smoke concentration at its position through the detection probe, and control the ammonia flow in the ammonia delivery pipe at its position through the flow regulating valve according to the concentration, thereby controlling the ammonia flow passing through different places in the flue gas channel, so that the ammonia spraying ports at various places of the ammonia spraying grid device can spray ammonia accurately, achieve the matching of the injected ammonia with the actual needs at various places in the flue gas channel, improve the denitrification effect of the SCR device, and reduce the waste of ammonia. At the same time, the double-tube nested structure of the composite tube can accommodate the connecting wires of the detection probe in the detection tube, preventing the connecting wires of the detection probe and the flow control valve from being damaged by smoke and high temperature, thereby improving the durability of the ammonia injection grid device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a top view of the internal structure of a precision ammonia spraying grid device for glass production according to an embodiment of the present utility model.

[0019] Figure 2 The utility model is a schematic diagram of the cross-sectional structure of a composite tube of a precision ammonia spraying grid device for glass production according to an embodiment of the present invention.

[0020] Figure 3 This is a diagram of the installation structure of a composite pipe of a precision ammonia spraying grid device for glass production according to an embodiment of the utility model.

[0021] In the above figure: 1- flue gas channel, 11- mounting seat, 2- detection tube, 3- ammonia delivery pipe, 31- accommodating chamber, 4- flow regulating valve, 5- ammonia supply pipe, 6- sealing ring, 61- sealing pressure plate, 62- sealing sleeve, 7- detection probe, 71- mounting tube, 72- connecting wire, 8- ammonia spray head, 81- ammonia spray pipe. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0023] Please refer to Figures 1 to 3 A precise ammonia spraying grid device for glass production includes a flue gas channel 1, a plurality of composite pipes and an ammonia supply pipe 5.

[0024] The flue gas channel 1 is a rectangular tube body, and all the composite tubes are arranged side by side in the flue gas channel 1. One end of the composite tube is fixed to the inner wall of the flue gas channel 1, and the other end of the composite tube passes through the side wall of the flue gas channel 1 and extends outside the flue gas channel 1. High-temperature smoke to be treated flows upward in the flue gas channel 1.

[0025] The composite tube is a double-tube nested structure, each composite tube includes a detection tube 2 and an ammonia gas delivery tube 3 arranged in the detection tube 2, and the two are coaxially arranged. A accommodating cavity 31 is formed between the outer wall of the detection tube 2 and the inner wall of the ammonia gas delivery tube 3. The length of the ammonia gas delivery tube 3 is slightly longer than the length of the detection tube 2. One end of the ammonia gas delivery tube 3 is the inlet end, and the inlet end of the ammonia gas delivery tube 3 extends out of the detection tube 2. The inlet end of the ammonia gas delivery tube 3 is connected to the ammonia gas supply tube 5. The ammonia gas supply tube 5 is located outside the flue gas channel 1 and is fixed to the outer wall of the flue gas channel 1 by a mounting bracket. The ammonia gas supply tube 5 is perpendicular to all ammonia gas delivery tubes 3. The ammonia gas supply tube 5 is used to input ammonia into the ammonia gas delivery tube 3. A flow regulating valve 4 is also provided on the inlet end of the ammonia gas delivery tube 3. The flow regulating valve 4 is used to regulate the flow of ammonia in the ammonia gas delivery tube 3 in which it is located. The flow regulating valve 4 is equipped with a controller for controlling the flow regulation process of the flow regulating valve 4.

[0026] The detection tube 2 is provided with a plurality of detection probes 7 and an ammonia injection pipe 81. The detection probe 7 is connected to a controller on the same composite pipe as the detection tube 2. The ammonia injection pipe 81 passes through the detection tube 2 and is connected to the ammonia delivery pipe 3. The end of the ammonia injection pipe 81 located outside the detection tube is an ammonia injection port. The ammonia injection port is used to spray ammonia in the ammonia delivery pipe 3 and mix it with the high-temperature smoke in the flue gas channel 1 to remove NOx gas in the smoke. In the above process, the detection probe 7 can detect the smoke concentration at its location. The controller controls the ammonia flow in the ammonia delivery pipe where it is located through the flow control valve 4 according to the concentration, thereby controlling the ammonia flow through different locations in the flue gas channel, so that the ammonia injection ports of the ammonia injection grid device can accurately inject ammonia, so that the injected ammonia matches the actual needs of each location in the flue gas channel, improves the denitrification effect of the SCR device, and reduces ammonia waste. It is understandable that the ammonia flow rate in different ammonia delivery pipes 3 in the above process can be different, and the ammonia injection flow rate of different ammonia injection ports installed in the same ammonia delivery pipe 3 is basically the same.

[0027] Preferably, each of the detection probes 7 is connected to the controller via a connecting wire 72, which is located within the accommodating cavity 31 between the outer wall of the detection tube 2 and the inner wall of the ammonia delivery tube 3. The double-tube nested structure of the composite tube allows the connecting wires of the detection probes 7 to be housed within the detection tubes, preventing the connecting wires between the detection probes 7 and the flow control valve 4 from being damaged by high temperatures caused by smoke and dust, thereby improving the durability of the ammonia injection grid device.

[0028] Preferably, each of the ammonia spray ports is connected to an ammonia spray head 8 , on which a plurality of ammonia spray holes are distributed. The ammonia spray head 8 can fully disperse the ammonia gas sprayed from the ammonia spray port, thereby fully mixing the ammonia gas with the smoke dust in the flue gas channel 1 .

[0029] Preferably, each detection tube 2 is provided with multiple mounting tubes 71, which penetrate the detection tube 2. The inner wall of the mounting tube 71 is provided with internal connecting threads, and the detection probe 7 is provided with external connecting threads, and the detection probe 7 is connected to the mounting tube 71 via the external threads. The detection probe 7 is located below the detection tube 2, and the ammonia injection port is located above the detection tube 2. This allows smoke in the flue gas duct 1 to pass through the detection probe 7 and the ammonia injection port in sequence, ensuring the responsiveness of the ammonia injection port in regulating the ammonia flow rate.

[0030] Preferably, a plurality of mounting seats 11 are provided inside the flue gas channel 1, and a circular limiting groove is provided on the mounting seat 11. The end of the detection tube 2 located inside the flue gas channel 1 is limited in the limiting groove, and the mounting seat ensures the stability of the installation structure of the detection tube 2.

[0031] Preferably, the side wall of the flue gas channel 1 is further provided with a mounting hole, and the detection tube 2 extends from the mounting hole to the outside of the flue gas channel 1. A sealing assembly is provided in the mounting hole, and the sealing assembly seals the gap between the mounting hole and the detection tube 2 to ensure the sealing of the flue gas channel 1 and prevent smoke and dust in the flue gas channel 1 from overflowing. In this embodiment, the sealing assembly includes a sealing sleeve 62, a sealing ring 6 and an annular sealing pressure plate 61. The sealing sleeve 62 and the sealing ring 6 are an integrated structure, and the sealing sleeve 62 and the sealing ring 6 are both made of rubber. The sealing sleeve 62 is embedded in the gap between the mounting hole and the detection tube 2, and the sealing ring 6 is connected to the end of the sealing sleeve 62. The sealing ring 6 and the sealing pressure plate 61 are both sleeved on the outside of the detection tube 2. The sealing pressure plate 61 is connected to the outer wall of the flue gas channel 1 by screws, and the sealing pressure plate 61 presses the sealing ring.

[0032] In this document, directional terms such as front, back, top, and bottom are defined based on the positions of components in the accompanying drawings and relative to each other, and are intended only for clarity and convenience in describing the technical solution. It should be understood that the use of these directional terms should not limit the scope of protection claimed in this application.

[0033] In the absence of conflict, the above embodiments and features in the embodiments may be combined with each other.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A precision ammonia spraying grid device for glass production, characterized in that: It includes a flue gas channel, multiple composite pipes, and an ammonia supply pipe; All the composite tubes are arranged in parallel in the smoke channel, and one end of the composite tube passes through the side wall of the smoke channel and extends to the outside of the smoke channel; Each composite tube includes a detection tube and an ammonia gas delivery tube disposed within the detection tube. The inlet end of the ammonia gas delivery tube extends to the detection tube and is connected to the ammonia gas supply tube. A flow regulating valve is also provided on the inlet end of the ammonia gas delivery tube. The flow regulating valve has a built-in controller for controlling the flow regulating valve. The detection tube is provided with a plurality of detection probes and an ammonia injection pipe. The detection probe is connected to a controller on the same composite tube as the detection probe. The ammonia injection pipe passes through the detection tube and is connected to the ammonia delivery pipe. The end of the ammonia injection pipe located outside the detection tube is an ammonia injection port.

2. The precise ammonia injection grid device for glass production according to claim 1, characterized in that: The detection probes are connected to the controller via connecting wires, and the connecting wires are located in a receiving cavity between the outer wall of the detection tube and the inner wall of the ammonia delivery tube.

3. The precise ammonia injection grid device for glass production according to claim 2, characterized in that: Each of the ammonia spray ports is connected to an ammonia spray head, and the ammonia spray head is provided with a plurality of ammonia spray holes.

4. The precise ammonia injection grid device for glass production according to claim 3, characterized in that: Each detection tube is provided with a plurality of mounting tubes, the mounting tubes pass through the detection tubes, the inner wall of the mounting tubes is provided with connecting internal threads, the detection probes are provided with connecting external threads, and the detection probes are connected to the mounting tubes via external threads.

5. The precise ammonia injection grid device for glass production according to claim 1, characterized in that: The detection probe is located below the detection tube, and the ammonia spray port is located above the detection tube.

6. The precise ammonia injection grid device for glass production according to claim 1, characterized in that: A plurality of mounting seats are provided inside the smoke channel, and a circular limiting groove is provided on the mounting seat. The end of the detection tube located inside the smoke channel is limited in the limiting groove.

7. The precise ammonia injection grid device for glass production according to claim 1, characterized in that: The side wall of the smoke channel is further provided with a mounting hole, and the detection tube extends from the mounting hole to the outside of the smoke channel.

8. The precise ammonia injection grid device for glass production according to claim 7, characterized in that: A sealing component is provided in the mounting hole, and the sealing component seals the gap between the mounting hole and the detection tube.

9. The precise ammonia injection grid device for glass production according to claim 8, characterized in that: The sealing assembly includes a sealing sleeve, a sealing ring and an annular sealing pressure plate. The sealing sleeve is embedded in the gap between the mounting hole and the detection tube. The sealing ring is connected to the end of the sealing sleeve. The sealing ring and the sealing pressure plate are both sleeved on the outside of the detection tube. The sealing pressure plate is connected to the outer wall of the flue gas channel by screws, and the sealing pressure plate presses the sealing ring.

10. The precise ammonia injection grid device for glass production according to claim 9, characterized in that: The sealing sleeve and the sealing ring are an integrated structure, and both the sealing sleeve and the sealing ring are made of rubber.

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