Denitration device of glass melting furnace

Abstract

The utility model provides a denitration device for a glass melting furnace, which relates to the technical field of glass production equipment and comprises a smoke inlet box, an ammonia spraying box and a reaction box, a first gas flow mixer is arranged between the smoke inlet box and the ammonia spraying box; an ammonia spraying pipe assembly is arranged in the ammonia spraying box, a second gas flow mixer is arranged between the reaction box and the ammonia spraying box, the second gas flow mixer comprises a flow mixing pipe, a driving part and a flow mixing fan, and the reaction box is filled with a catalyst. The denitration device disclosed by the utility model has the beneficial effects that the first gas flow mixer of the denitration device is arranged between the smoke inlet box and the ammonia spraying box, so that smoke before ammonia spraying can be fully mixed, the fluctuation of the flow of the smoke entering the ammonia spraying box is reduced, ammonia and nitrate in the smoke entering the reaction box can be fully mixed and fully reacted by the second gas flow mixer, and the denitration effect is improved. Therefore, the flue gas denitration treatment effect of the glass melting furnace is improved, waste of ammonia gas or liquid ammonia is reduced, in addition, the second gas flow mixer can promote flue gas to flow to the reaction box, and the flue gas denitration treatment efficiency of the glass melting furnace is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of glass production equipment, in particular to a denitration device for a glass melting furnace. Background Art

[0002] A glass melting furnace is a device used to heat and melt glass during the glass manufacturing process. The glass furnace produces high-temperature flue gas during operation. The flue gas from the glass melting furnace mainly comes from the combustion emissions of the melting furnace during the glass production process. These flue gases contain a variety of pollutants, such as smoke particles, nitrate-containing gases (mainly nitrogen oxides NOx), etc., which are potential hazards to the environment and human health. At present, when the flue gas from the glass melting furnace is discharged, it is necessary to spray ammonia on it to denitrate the flue gas from the glass melting furnace. When the existing glass melting furnace denitrification device sprays ammonia (ammonia water or liquid ammonia), it is difficult to fully mix the sprayed ammonia gas or liquid ammonia with the glass melting furnace flue gas, and the two are difficult to react completely, which will make the denitrification treatment of the glass melting furnace flue gas insufficient and easily cause ammonia waste. Utility Model Content

[0003] In view of this, in order to improve the mixing degree of ammonia and nitric acid in the glass melting furnace denitrification device, promote the charging reaction of ammonia and nitric acid, and improve the denitrification treatment effect of the flue gas of the glass melting furnace, the utility model provides a glass melting furnace denitrification device, including a smoke inlet box, an ammonia spray box and a reaction box connected in sequence;

[0004] A smoke inlet for connecting to the glass melting furnace is provided below the smoke inlet box, and a first gas mixer is provided between the smoke inlet box and the ammonia spray box;

[0005] An ammonia injection pipe assembly is provided in the ammonia injection box, and the ammonia injection pipe assembly includes an ammonia injection main pipe and an ammonia injection branch pipe vertically connected to the ammonia injection main pipe, and each ammonia injection branch pipe is provided with at least one ammonia injection port;

[0006] A second gas mixer is provided between the reaction box and the ammonia spray box, the second gas mixer comprising a mixing tube, a driving component and at least one mixing fan, the two ends of the mixing tube are respectively connected to the reaction box and the ammonia spray box, the mixing fan is rotatably arranged in the mixing tube, and the driving component is used to drive the mixing fan to rotate;

[0007] The reaction box is filled with a catalyst, and a denitration outlet is provided at the lower part of the reaction box.

[0008] Furthermore, the first gas flow mixer includes a flow mixing sleeve and a plurality of flow mixing honeycomb plates arranged in parallel in the flow mixing sleeve, and flow mixing gaps are provided between adjacent flow mixing honeycomb plates.

[0009] Furthermore, the mixed flow tube is a cylindrical tube body, the driving component is a driving motor, the output shaft fixing sleeve of the driving motor is provided with a mounting sleeve, and the mixed flow fan is fixed on the mounting sleeve.

[0010] Furthermore, there are two mixed flow fans, each of which includes a plurality of mixed flow blades, and the two mixed flow fans are arranged at intervals.

[0011] Furthermore, the driving motor is fixed to the outer wall of the reaction box, and the output shaft of the driving motor passes through the reaction box and extends into the mixing tube.

[0012] Furthermore, a rotating mounting seat is provided in the mixing tube, and the rotating mounting seat is fixedly arranged in the mixing tube through a connecting rod, and the output shaft of the driving motor extends to the end of the mixing tube and is rotatably mounted in the rotating mounting seat.

[0013] Furthermore, a mounting platform is fixedly provided on the outer wall of the reaction box, and the driving motor is fixedly installed on the mounting platform.

[0014] Furthermore, a sealing shell is provided on the reaction box, and the sealing shell is connected to the outer wall of the reaction box and surrounds the driving motor.

[0015] Furthermore, at least one catalytic baffle group is provided in the reaction box, and the catalytic baffle group includes two catalytic baffles, the edges of the two catalytic baffles are connected to the inner wall of the reaction box, and multiple air-permeable through holes are distributed on the two catalytic baffles, and the catalyst is filled between the two catalytic baffles.

[0016] Furthermore, a plurality of dust removal baffles are provided in the smoke inlet box, a dust collecting funnel is also provided at the lower part of the smoke inlet box, a dust removal port is provided below the dust removal baffles, and the dust collecting funnel is connected to the dust removal port.

[0017] The utility model provides a denitration device for a glass melting furnace with the following beneficial effects: the denitration device for the glass melting furnace comprises a smoke inlet box, an ammonia spray box and a reaction box; a first gas mixer is arranged between the smoke inlet box and the ammonia spray box; an ammonia spray pipe assembly is arranged in the ammonia spray box, a second gas mixer is arranged between the reaction box and the ammonia spray box, the second gas mixer comprises a mixing pipe, a driving component and a mixing fan, a catalyst is arranged in the reaction box, wherein the first gas mixer is arranged between the smoke inlet box and the ammonia spray box so that the flue gas before ammonia spraying can be fully mixed, and the fluctuation of the flue gas flow entering the ammonia spray box can be reduced; an ammonia spray pipe assembly is arranged in the ammonia spray box so that atomized ammonia water or liquid ammonia can be sprayed into the flue gas in the ammonia spray box; the second gas mixer can make the ammonia and nitric acid entering the reaction box fully mixed and fully reacted, thereby improving the denitration treatment effect of the flue gas of the glass melting furnace and reducing the waste of ammonia gas or liquid ammonia. In addition, the second gas mixer can also promote the flow of flue gas to the reaction box, and improve the denitration treatment efficiency of the flue gas of the glass melting furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic cross-sectional structure diagram of a glass melting furnace denitration device according to an embodiment of the utility model.

[0019] Figure 2 yes Figure 1 Cross-section at AA in the middle.

[0020] Figure 3 yes Figure 1 Cross-section at the middle BB.

[0021] In the above figure: 1-smoke inlet box, 11-smoke inlet, 12-dust removal baffle, 2-ammonia spray box, 3-reaction box, 31-catalytic baffle, 4-connecting box, 41-mixed flow sleeve, 42-mixed flow honeycomb plate, 5-mixed flow pipe, 51-6-ammonia spray main pipe, 61-flow regulating valve, 62-ammonia spray branch pipe, 63-ammonia spray short pipe, 7-driving motor, 71-sealing shell, 72-mounting sleeve, 73-mixed flow blade, 8-dust collecting funnel. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model clearer, the implementation mode of the utility model will be further described below in conjunction with the accompanying drawings.

[0023] Please refer to Figures 1 to 3 A denitration device for a glass melting furnace comprises a smoke inlet box 1, an ammonia spraying box 2 and a reaction box 3. The smoke inlet box 1, the ammonia spraying box 2 and the reaction box 3 are sequentially connected to form a flue gas flow passage for the glass melting furnace flue gas to flow.

[0024] A smoke inlet 11 for connecting to a glass melting furnace is provided below the smoke inlet box 1, and the smoke inlet 11 introduces the high-temperature flue gas generated by the glass melting furnace into the flue gas flow passage. A first gas mixer is provided between the smoke inlet box 1 and the ammonia spray box 2; in this embodiment, the smoke inlet box 1 and the ammonia spray box 2 are connected via a connecting box 4, and the first gas mixer includes a mixing flow sleeve 41 and a plurality of mixed flow honeycomb panels 42 arranged in parallel in the mixing flow sleeve 41, the mixing flow sleeve 41 is fixed in the connecting box 4, the mixing flow sleeve 41 and the connecting box 4 are both rectangular hollow sleeves, the mixed flow honeycomb panels 42 are perpendicular to the axis of the mixing flow sleeve 41, honeycomb holes are distributed on the mixed flow honeycomb panels 42, and mixed flow gaps are provided between adjacent mixed flow honeycomb panels 42 (that is, there is a distance between adjacent mixed flow honeycomb panels 42, and the distance is the mixed flow gap).

[0025] An ammonia injection pipe assembly is provided in the ammonia injection box 2, and the ammonia injection pipe group includes an ammonia injection main pipe 6 and an ammonia injection branch pipe 62 vertically connected to the ammonia injection main pipe 6. Each ammonia injection branch pipe 62 is provided with at least one ammonia injection short pipe 63. The upper end opening of the ammonia injection short pipe 63 is an ammonia injection port. The ammonia injection pipe is connected to the ammonia supply device. A flow regulating valve 61 is also provided on the ammonia injection pipe. The ammonia injection port can spray ammonia water or liquid ammonia in an atomized state.

[0026] A second gas mixer is provided between the reaction box 3 and the ammonia spray box 2, and the second gas mixer includes a mixing tube 5, a driving component and at least one mixing fan. The two ends of the mixing tube 5 are respectively connected to the reaction box 3 and the ammonia spray box 2. The mixing fan is rotatably arranged in the mixing tube 5, and the driving component is used to drive the mixing fan to rotate. The reaction box 3 is filled with a catalyst, and a denitration outlet is provided at the lower part of the reaction box 3.

[0027] When the glass melting furnace denitrification device is working, the flue gas of the glass melting furnace enters the flue gas flow passage from the smoke inlet 11. The first gas mixer can fully mix the flue gas before ammonia spraying, reduce the fluctuation of the flue gas flow entering the ammonia spray box 2, and keep the flue gas flow stable. The ammonia spray pipe assembly sprays atomized ammonia water or liquid ammonia into the ammonia spray box 2 through the ammonia spray port to mix the two. The mixing fan of the second gas mixer rotates to suck the mixed flue gas and ammonia water (or liquid ammonia) in the ammonia spray box into the reaction box 3, and promotes the full mixing of the two in the process. The mixture of flue gas and ammonia in the reaction box 3 reacts under the action of the catalyst in the reaction box 3 and the high temperature of the flue gas itself, thereby removing the nitrate-containing gas in the flue gas, and the reaction output is discharged from the denitrification outlet.

[0028] Preferably, the mixed flow tube is a cylindrical tube body, the driving component is a driving motor 7, the output shaft fixing sleeve of the driving motor 7 is provided with a mounting sleeve 72, and the mixed flow fan is fixed on the mounting sleeve 72. There are two mixed flow fans, each of which includes a plurality of mixed flow blades 73, and the two mixed flow fans are arranged at intervals. The double mixed flow fan structure can enhance its mixing effect on flue gas and ammonia.

[0029] Preferably, the drive motor 7 is fixed to the outer wall of the reaction box 3, and the output shaft of the drive motor 7 extends to pass through the reaction box 3 and extends into the mixing tube 5. A rotating mounting seat is provided in the mixing tube 5, and the rotating mounting seat is fixedly arranged in the mixing tube 5 through a connecting rod. The output shaft of the drive motor 7 extends to the end of the mixing tube 5 and is rotatably mounted in the rotating mounting seat. A mounting platform is fixedly provided on the outer wall of the reaction box 3, and the drive motor 7 is fixedly mounted on the mounting platform. A sealing shell 71 is also provided on the reaction box 3, and the sealing shell 71 is connected to the outer wall of the reaction box 3 and surrounds the drive motor 7. The above-mentioned mounting structure of the drive motor 7 can ensure the sealing of the flue gas flow channel, and can prevent the drive motor 7 from being directly damaged by flue gas impurities and high temperature of the flue gas.

[0030] Preferably, at least one catalytic baffle group is provided in the reaction box 3, and the catalytic baffle group includes two catalytic baffles 31 arranged relatively up and down, and the edges of the two catalytic baffles 31 are connected to the inner wall of the reaction box 3, and multiple air-permeable through holes are distributed on the two catalytic baffles 31. The catalyst is wrapped with a metal mesh and filled between the two catalytic baffles 31. In this embodiment, the number of the catalytic baffle groups 31 is two.

[0031] Preferably, a plurality of dust removal baffles are provided in the smoke inlet box 1, and a dust collecting funnel 8 is also provided at the lower part of the smoke inlet box 1. A dust removal port is provided below the dust removal baffle, and the dust collecting funnel 8 is connected to the dust removal port. The dust removal baffle is used to block part of the smoke dust particles in the flue gas and cause them to fall into the dust collecting funnel 8, so that the smoke dust particles in the flue gas are accumulated in the flue gas flow duct. It can be understood that the outlet end of the dust collecting funnel 8 is closed during the operation of the glass melting furnace denitrification device, and is opened after the glass melting furnace denitrification device stops working to clean the smoke dust particles accumulated therein.

[0032] In this document, the directional words such as front, back, top, and bottom are defined by the positions of the components in the drawings and the positions of the components relative to each other, and are only for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of the directional words 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 substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A denitration device for a glass melting furnace, characterized in that: It includes a smoke inlet box, an ammonia spray box and a reaction box which are connected in sequence; A smoke inlet for connecting to a glass melting furnace is provided below the smoke inlet box, and a first gas mixer is provided between the smoke inlet box and the ammonia spray box; An ammonia injection pipe assembly is provided in the ammonia injection box, and the ammonia injection pipe assembly includes an ammonia injection main pipe and an ammonia injection branch pipe connected to the ammonia injection main pipe, and each ammonia injection branch pipe is provided with at least one ammonia injection port; A second gas mixer is provided between the reaction box and the ammonia spray box, the second gas mixer comprises a mixing tube, a driving component and at least one mixing fan, the two ends of the mixing tube are respectively connected to the reaction box and the ammonia spray box, the mixing fan is rotatably arranged in the mixing tube, and the driving component is used to drive the mixing fan to rotate; The reaction box is filled with a catalyst, and a denitration outlet is provided at the lower part of the reaction box.

2. A denitration device for a glass melting furnace according to claim 1, characterized in that: The first gas flow mixer comprises a flow mixing sleeve and a plurality of flow mixing honeycomb plates arranged in parallel in the flow mixing sleeve, and flow mixing gaps are arranged between adjacent flow mixing honeycomb plates.

3. A denitration device for a glass melting furnace according to claim 1, characterized in that: The mixed flow tube is a cylindrical tube body, the driving component is a driving motor, a mounting sleeve is provided on the fixed sleeve on the output shaft of the driving motor, and the mixed flow fan is fixed on the mounting sleeve.

4. A denitration device for a glass melting furnace according to claim 3, characterized in that: There are two mixed flow fans, each of which includes a plurality of mixed flow blades, and the two mixed flow fans are arranged at an interval.

5. A denitration device for a glass melting furnace according to claim 3, characterized in that: The driving motor is fixed to the outer wall of the reaction box, and the output shaft of the driving motor passes through the reaction box and extends into the mixing tube.

6. A denitration device for a glass melting furnace according to claim 5, characterized in that: A rotating mounting seat is arranged in the mixing tube, and the rotating mounting seat is fixedly arranged in the mixing tube through a connecting rod. The output shaft of the driving motor extends to the end of the mixing tube and is rotatably mounted in the rotating mounting seat.

7. A denitration device for a glass melting furnace according to claim 5, characterized in that: The outer wall of the reaction box is fixedly provided with a mounting platform, and the driving motor is fixedly installed on the mounting platform.

8. A denitration device for a glass melting furnace according to claim 5, characterized in that: The reaction box is also provided with a sealing shell, which is connected to the outer wall of the reaction box and surrounds the driving motor.

9. A denitration device for a glass melting furnace according to claim 1, characterized in that: At least one catalytic baffle group is arranged in the reaction box, and the catalytic baffle group includes two catalytic baffles. The edges of the two catalytic baffles are connected to the inner wall of the reaction box. Multiple air-permeable through holes are distributed on the two catalytic baffles, and the catalyst is filled between the two catalytic baffles.

10. A denitration device for a glass melting furnace according to claim 1, characterized in that: A plurality of dust removal baffles are arranged in the smoke inlet box, and a dust collecting funnel is also arranged at the lower part of the smoke inlet box. A dust removal port is arranged below the dust removal baffles, and the dust collecting funnel is connected to the dust removal port.

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