Desulfurization and dust removal system for glass melting furnace

Abstract

The utility model discloses a desulfurization and dust removal system for a glass melting furnace, which comprises an NID reactor, two ends of the NID reactor are respectively connected with a desulfurization inlet and a settling chamber, the settling chamber is connected with a bag-type dust collector and a fluidization bottom bin, the bag-type dust collector is connected with the fluidization bottom bin, and an SDS desulfurization system is connected between the NID reactor and the desulfurization inlet. By adopting the desulfurization and dust removal system for the glass melting furnace disclosed by the utility model, online replacement of the fluidizing cloth can be realized, and the risk of environmental pollution is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of glass melting furnaces, and specifically relates to a desulfurization and dust removal system for a glass melting furnace. Background Art

[0002] After a glass melting furnace is ignited and operates normally, it usually takes 5 to 8 years before it is shut down for cold maintenance. Therefore, the furnace cannot be shut down for environmental protection facility maintenance during this period. If the desulfurization system needs to replace the fluidized cloth in the fluidized bottom bin, it is necessary to apply to the environmental protection department for the environmental protection device to be shut down for maintenance. At this time, the flue gas emissions do not meet the standards, which will bring environmental pollution risks and affect production efficiency.

[0003] Since it is difficult to set up a backup system for the fluidized bottom silo due to site limitations, the current backup system in the glass kiln NID desulfurization and dust removal system only requires adding a set of NID desulfurization reactors, mixers, and circulating variable frequency feeders. This way of setting up a backup system can only solve the problem of online maintenance of the mixer and circulating variable frequency feeder, but the fluidized bed cloth cannot be replaced online.

[0004] A utility model patent, publication number CN205127701U, published on April 6, 2016, discloses a desulfurization and denitrification device for glass furnace flue gas. The device includes a desulfurization and denitrification tower, a charging device, a discharge port, a flue gas inlet, and a flue gas outlet. This desulfurization and denitrification device for glass furnace flue gas also fails to address the aforementioned technical issues. Utility Model Content

[0005] The purpose of the utility model is to address the deficiencies of the existing technology and provide a desulfurization and dust removal system for a glass melting furnace, which can realize online replacement of fluidized cloth and reduce the risk of environmental pollution.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] This glass melting furnace desulfurization and dust removal system includes a NID reactor, wherein the two ends of the NID reactor are respectively connected to a desulfurization inlet and a sedimentation chamber, the sedimentation chamber is connected to a bag dust collector and a fluidized bottom bin, the bag dust collector is connected to the fluidized bottom bin, an SDS desulfurization system is connected between the NID reactor and the desulfurization inlet, and the sedimentation chamber and the bag dust collector are both connected to a partition mechanism.

[0008] The SDS desulfurization system includes a screw feeder, the screw feeder is connected to a grinder, and the grinder is connected to a NID reactor.

[0009] The partition mechanism includes a gate valve, the bag dust collector includes an ash hopper, the ash hoppers are arranged in parallel, the gate valve is arranged at the sedimentation chamber and the bottom end of the ash hopper, and the gate valve is located above the fluidized bottom bin.

[0010] The bottom of the fluidized bottom bin is connected to a circulating ash variable frequency feeder, and the circulating ash variable frequency feeder and the NID reactor are connected to a mixer.

[0011] The outlet end of the bag filter is connected to a desulfurization induced draft fan; the grinder is also connected to a dosing pump, and a mixing conveying fan is provided between the grinder and the NID reactor.

[0012] An electric crane is provided above the spiral feeder.

[0013] The screw feeder, the settling chamber and the bottom of the ash hopper are all conical structures.

[0014] The technical effect of the utility model is: by adopting the desulfurization and dust removal system of the glass melting furnace of the utility model, by adding a set of SDS desulfurization system to meet the online replacement needs of the fluidized cloth, a gate valve is also added as a partition mechanism of the fluidized bottom bin. When the fluidized cloth needs to be replaced, the desulfurization system can be switched from NID desulfurization to SDS desulfurization, and the gate valves between the ash hopper and the fluidized bottom bin, and between the sedimentation chamber and the fluidized bottom bin are closed. The fluidized cloth is replaced after the fluidized bottom bin is cooled. The fluidized cloth can be replaced online without shutting down, and the flue gas pollutants are discharged in compliance with the standards, avoiding the risk of environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] This manual includes the following drawings, which show the following contents:

[0016] Figure 1 It is a schematic diagram of the desulfurization and dust removal system of the glass melting furnace of the present invention. DETAILED DESCRIPTION

[0017] The following is a further detailed description of the specific implementation methods of the present invention by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention and to facilitate their implementation.

[0018] like Figure 1 As shown, the desulfurization and dust removal system of the glass melting furnace includes a NID reactor, wherein the two ends of the NID reactor are respectively connected to a desulfurization inlet and a sedimentation chamber, the sedimentation chamber is connected to a bag dust collector and a fluidized bottom bin, the bag dust collector is connected to the fluidized bottom bin, an SDS desulfurization system is connected between the NID reactor and the desulfurization inlet, and the sedimentation chamber and the bag dust collector are both connected to a partition mechanism.

[0019] When using the NID desulfurization system, the fluidized bed silo is a key device in the return system. If the return is not in operation, the outlet SO2 concentration cannot meet the emission standards. Therefore, the fluidized bed silo cannot be isolated and removed, and the fluidized cloth cannot be replaced. On the basis of the original NID desulfurization and dust removal process system, an SDS desulfurization system (sodium bicarbonate dry desulfurization technology) is added as a backup system for NID desulfurization. At the same time, gate valves are added between the ash hopper and the fluidized bed silo, and between the settling chamber and the fluidized bed silo as a partition mechanism. When the fluidized cloth needs to be replaced, the desulfurization system can be switched from NID desulfurization to SDS desulfurization, and the gate valves between the ash hopper and the fluidized bed silo, and between the settling chamber and the fluidized bed silo are closed. The fluidized cloth can be replaced after the fluidized bed silo cools down. In this way, the fluidized cloth can be replaced online, and the flue gas pollutants meet the emission standards. In the current increasingly severe environmental protection situation, it can be replaced without stopping the system, avoiding environmental risks.

[0020] like Figure 1 As shown, the SDS desulfurization system includes a screw feeder connected to a grinder, which is in turn connected to a NID reactor. The SDS desulfurization system reacts the absorbent sodium bicarbonate with sulfur dioxide to produce harmless sodium thiosulfate, carbon dioxide, and water vapor. This system does not require a return cycle, so the fluidized bed silo can be isolated to replace the fluidized bed cloth. The reaction products are harmless and environmentally friendly. The screw feeder is used to transport sodium bicarbonate to the grinder, which grinds the added sodium bicarbonate into an ultrafine powder, increasing its specific surface area. This makes the sodium carbonate produced by its decomposition at high temperatures more reactive, allowing it to react more effectively with sulfur dioxide in the flue gas, thereby improving desulfurization efficiency. Furthermore, the ground powdered sodium bicarbonate is more dispersible and can be more evenly coated on the surface of the flue gas, further enhancing the desulfurization effect.

[0021] like Figure 1 As shown, the isolation mechanism includes a gate valve, and the bag filter includes an ash hopper. The ash hoppers are arranged in parallel. The gate valves are located at the bottom of the settling chamber and the ash hopper, and the gate valve is located above the fluidized bottom silo. To further isolate the fluidized bottom silo during fluidized cloth replacement, a gate valve is added as a partition between the settling chamber and the bag filter. This isolates the fluidized bottom silo, ensuring that desulfurization ash and other substances in the settling chamber and ash hopper do not affect the replacement process of the fluidized cloth in the fluidized bottom silo.

[0022] like Figure 1 As shown, a circulating ash variable frequency feeder is connected to the bottom of the fluidized bed silo. A mixer is connected to the circulating ash variable frequency feeder and the NID reactor. The circulating ash variable frequency feeder is used to return desulfurization ash, transporting it to the bottom of the NID reactor to achieve desulfurization ash circulation.

[0023] like Figure 1As shown, the outlet of the bag filter is connected to a desulfurization induced draft fan; the grinder is also connected to a dosing pump, and a mixing and conveying fan is installed between the grinder and the NID reactor. The bag filter is connected to the desulfurization induced draft fan. The flue gas after the reaction passes through the settling chamber and the bag filter in sequence, and is then drawn out by the desulfurization induced draft fan for discharge, which helps to increase the flue gas discharge rate. The mixing and conveying fan thoroughly mixes the process water and reagents added by the dosing pump with the sodium bicarbonate powder to further improve the rate and completeness of the subsequent desulfurization reaction.

[0024] like Figure 1 As shown in FIG, an electric crane is installed above the screw feeder. The electric crane is used to lift the sodium bicarbonate material into the screw feeder.

[0025] like Figure 1 As shown, the spiral feeder, settling chamber, and ash hopper bottom all have a conical structure. This prevents the accumulation of materials or desulfurization ash within the container, reducing production anomalies. The NID reactor is J-shaped, creating a bottom-up flue gas flow path that facilitates full desulfurization and conforms to the flue gas flow process.

[0026] Before the improvement, when replacing the fluidized bed cloth, it was necessary to apply to the environmental protection department for shutdown and maintenance. At this time, the pollutant emissions were unqualified, which brought environmental risks. The shutdown caused production stagnation and greatly affected production efficiency. In view of the actual production situation, by adding an SDS desulfurization system, it can be achieved during the replacement of the fluidized bed cloth that the flue gas pollutants are discharged in compliance with the standards, eliminating the risk of environmental pollution. Under normal operation, the main NID desulfurization system is used. When the fluidized bed cloth needs to be replaced, the desulfurization system switches from NID desulfurization to SDS desulfurization, and at the same time closes the gate valves between the ash hopper and the fluidized bed silo, and between the sedimentation chamber and the fluidized bed silo. After the silo cools down, the fluidized bed cloth is replaced, so that the fluidized bed cloth can be replaced online, which ensures the continuity of production.

[0027] The desulfurization and dust removal system of the glass melting furnace adds an SDS desulfurization system to meet the online replacement needs of the fluidized cloth. A gate valve is also added as a partition mechanism for the fluidized bottom silo. When the fluidized cloth needs to be replaced, the desulfurization system can switch from NID desulfurization to SDS desulfurization, close the gate valves between the ash hopper and the fluidized bottom silo, and between the sedimentation chamber and the fluidized bottom silo, and replace the fluidized cloth after the fluidized bottom silo cools down. The fluidized cloth can be replaced online without shutting down the machine, and the flue gas pollutants are discharged in compliance with the standards, avoiding the risk of environmental pollution.

[0028] The above description of the present invention is provided as an example, in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described method. Any non-substantial improvements made using the method concepts and technical solutions of the present invention, or any application of the above-described concepts and technical solutions of the present invention to other situations without modification, are all within the scope of protection of the present invention.

Claims

1. A desulfurization and dust removal system for a glass melting furnace, characterized by: It includes a NID reactor, wherein both ends of the NID reactor are respectively connected to a desulfurization inlet and a sedimentation chamber, the sedimentation chamber is connected to a bag dust collector and a fluidized bottom bin, the bag dust collector is connected to the fluidized bottom bin, an SDS desulfurization system is connected between the NID reactor and the desulfurization inlet, and the sedimentation chamber and the bag dust collector are both connected to a partition mechanism.

2. The desulfurization and dust removal system for a glass melting furnace according to claim 1, characterized in that: The SDS desulfurization system includes a screw feeder, the screw feeder is connected to a grinder, and the grinder is connected to a NID reactor.

3. The desulfurization and dust removal system for a glass melting furnace according to claim 1 or 2, characterized in that: The partition mechanism includes a gate valve, the bag dust collector includes an ash hopper, the ash hoppers are arranged in parallel, the gate valve is arranged at the sedimentation chamber and the bottom end of the ash hopper, and the gate valve is located above the fluidized bottom bin.

4. The desulfurization and dust removal system for a glass melting furnace according to claim 3, characterized in that: The bottom of the fluidized bottom bin is connected to a circulating ash variable frequency feeder, and the circulating ash variable frequency feeder and the NID reactor are connected to a mixer.

5. The desulfurization and dust removal system for a glass melting furnace according to claim 2, characterized in that: The outlet end of the bag filter is connected to a desulfurization induced draft fan; the grinder is also connected to a dosing pump, and a mixing conveying fan is provided between the grinder and the NID reactor.

6. The desulfurization and dust removal system for a glass melting furnace according to claim 2, characterized in that: An electric crane is provided above the spiral feeder.

7. The desulfurization and dust removal system for a glass melting furnace according to claim 2, characterized in that: The screw feeder, the settling chamber and the bottom of the ash hopper are all conical structures.

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