A diesel generator flue gas purification mechanism for civil air defense projects

Abstract

The utility model discloses a diesel generator flue gas purification mechanism for civil air defence engineering, including air inlet pipe and purification bin, the air inlet pipe one end is linked with diesel generator exhaust pipe in civil air defence engineering power generation room intercommunication, the other end of air inlet pipe is inserted into the purification bin and the opening direction is perpendicular to downward, the open end position of air inlet pipe in the purification bin is connected with the shunt joint, each interface of shunt joint all is connected with the jet pipe that the air hole of pipe body lateral wall is evenly set up, the utility model relates to civil air defence engineering technical field, utilize liquid supply booster pump and press into the spray subassembly in alkaline solution (15% magnesium hydroxide compound agent), and further via spray subassembly to the spray of filler layer, make the nitrogen monoxide, nitrogen dioxide, sulfur dioxide and particulate matter etc. in tail gas contact with the alkaline water mist in purification bin and filler layer, to the purification treatment of nitrogen monoxide, nitrogen dioxide, sulfur dioxide and particulate matter.

Description

Technical Field

[0001] This utility model relates to the field of civil defense engineering technology, specifically to a diesel generator flue gas purification mechanism for civil defense engineering. Background Technology

[0002] Civil defense power stations are used in wartime situations where the city's power grid has been damaged by the enemy. Diesel generators (or units) in the civil defense basement are put into operation to generate electricity, powering the basement's ventilation, water supply, drainage, lighting, and other equipment. The large amount of exhaust gas emitted during the operation of the diesel generators must be purified and then exhausted to the outside of the civil defense fortification through the exhaust system. An existing patent (publication number: CN215170276U) describes a tail gas purification device for diesel generator sets. When the filter structure becomes clogged, it can promptly alert workers, preventing accidents caused by excessive internal pressure after blockage, thus improving the safety of power generation operations. It can also adsorb and filter particles in the exhaust gas, and the particulate filter can be easily replaced, saving time and greatly improving work efficiency. However, the above solution can only filter and intercept particulate matter in the exhaust gas, and cannot effectively purify gaseous pollutants such as nitrogen oxides (nitric oxide, nitrogen dioxide) and acidic VOCs (such as sulfur dioxide). The purification function is relatively limited, and the exhaust gas purification quality is poor. Therefore, this case arose from in-depth research into these problems. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a diesel generator flue gas purification mechanism for civil defense projects, which solves the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a diesel generator flue gas purification mechanism for civil defense projects, comprising an intake pipe and a purification chamber. One end of the intake pipe is connected to the exhaust pipe of the diesel generator inside the civil defense project's power generation chamber, and the other end of the intake pipe extends into the purification chamber with its opening vertically downward. A diversion connector is connected to the opening end of the intake pipe within the purification chamber. Each interface of the diversion connector is connected to a jet pipe with evenly distributed ventilation holes on its side wall. Multiple spray components are arranged above the jet pipes. A packing layer is provided below the spray assembly. One end of the spray assembly extends out of the purification chamber and is connected to the liquid supply booster pump. A liquid collection hopper is provided at the bottom of the purification chamber. A booster filter assembly is connected to the lower part of the liquid collection hopper. The return water end of the booster filter assembly is connected to the liquid storage tank. An exhaust duct is connected to the upper part of the purification chamber. An axial flow fan is installed at one end of the exhaust duct. A double-layer arc-shaped hot-dip galvanized steel mesh is provided at the connection between the purification chamber and the exhaust duct to intercept water mist. A pressure sensor is installed inside the purification chamber to monitor the internal pressure.

[0005] The above-mentioned spray assembly includes a mounting frame, an annular spray pipe, nozzles, and a liquid supply pipe. The mounting frame is installed inside the purification chamber. The annular spray pipe is assembled and connected to the mounting frame and located above the air jet pipe. The nozzles are evenly installed on the lower side wall of the annular spray pipe and the spray direction is directly facing the packing layer. One end of the liquid supply pipe is connected to the annular spray pipe, and the other end is connected to the liquid supply booster pump.

[0006] The aforementioned pressurized filtration assembly includes a return liquid booster pump, a filter chamber, and a return liquid pipe. The inlet end of the return liquid booster pump is connected to the liquid collection hopper. The filter chamber is equipped with a high-temperature and corrosion-resistant stainless steel sintered mesh filter element. One end of the filter chamber is connected to the outlet end of the return liquid booster pump, and the other end is connected to the liquid storage tank through the return liquid pipe. The outer ring surface of the return liquid pipe is welded with heat exchange fins.

[0007] The aforementioned storage tank is filled with 15% magnesium hydroxide compound and is equipped with a concentration monitoring sensor.

[0008] The bottom of the above-mentioned liquid storage tank is equipped with a drive mechanism. The output end of the drive mechanism is equipped with a stirring shaft. One end of the stirring shaft is inserted into the liquid storage tank, and a stirring paddle is fixedly mounted on the stirring shaft.

[0009] The above-mentioned liquid storage tank is equipped with a drug filling port on the top. Beneficial effects

[0010] This utility model provides a diesel generator exhaust gas purification mechanism for civil defense projects. It has the following beneficial effects: This diesel generator exhaust gas purification mechanism for civil defense projects introduces diesel generator exhaust gas into the purification chamber through an intake pipe, and evenly sprays the exhaust gas into the purification chamber through a distributor and a jet pipe. During this process, an alkaline solution (15% magnesium hydroxide composite agent) is pressurized into the spray assembly using a liquid supply booster pump, and further sprayed onto the packing layer through the spray assembly. This allows nitrogen monoxide, nitrogen dioxide, sulfur dioxide, and particulate matter in the exhaust gas to come into contact with the alkaline water mist in the purification chamber and the packing layer, thus purifying the exhaust gas. The physicochemical properties of alkaline water mist are used to purify nitric oxide, nitrogen dioxide, sulfur dioxide, and particulate matter, while simultaneously cooling the flue gas. The water mist flows downward into the collection hopper under gravity, and the impurity-laden treatment liquid is filtered through a pressurized filter assembly before being returned to the storage tank, further improving the recycling efficiency of the treatment liquid. The axial flow fan can better ensure the air pressure stability in the purification chamber, ensure smooth smoke exhaust, and better ensure the operational stability and efficiency of the diesel generator set inside the civil defense project. Attached Figure Description

[0011] Figure 1 This is a front view structural schematic diagram of a diesel generator flue gas purification mechanism for civil defense engineering as described in this utility model.

[0012] Figure 2 This utility model Figure 1 A magnified schematic diagram of the structure at position a.

[0013] Figure 3 This is an isometric structural diagram of the diverter described in this utility model.

[0014] In the diagram: 1. Intake pipe; 2. Purification chamber; 3. Diesel generator exhaust pipe; 4. Diverter; 5. Jet pipe; 6. Liquid supply booster pump; 7. Liquid collection hopper; 8. Liquid storage tank; 9. Exhaust duct; 10. Axial flow fan; 11. Arc-shaped hot-dip galvanized steel mesh; 12. Pressure sensor; 13. Mounting bracket; 14. Annular spray pipe; 15. Spray nozzle; 16. Liquid supply pipe; 17. Return liquid booster pump; 18. Filter chamber; 19. Return liquid pipe; 20. Concentration monitoring sensor; 21. Drive mechanism; 22. Stirring shaft; 23. Stirring paddle; 24. Chemical filling port; 25. Packing layer. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Example: Refer to the appendix of the instruction manual Figure 1-3As can be seen, this application specifically designs a diesel generator flue gas purification mechanism for civil defense projects, including an air inlet pipe 1 and a purification chamber 2. One end of the air inlet pipe 1 is connected to the exhaust pipe 3 of the diesel generator in the power generation room of the civil defense project, and the other end of the air inlet pipe 1 extends into the purification chamber 2 with its opening direction vertically downward. A diversion connector 4 is connected to the opening end of the air inlet pipe 1 in the purification chamber 2. Each interface of the diversion connector 4 is connected to a jet pipe 5 with evenly spaced vent holes on the side wall of the pipe body. Multiple sets of spray components are arranged above the jet pipe 5, and a packing layer 25 is arranged below the spray components. One end of the spray component extends out of the purification chamber 2 and is connected to a liquid supply booster pump 6. The bottom of the purification chamber 2 is provided with There is a liquid collection hopper 7, and a pressure-boosting filter assembly is connected to the lower part of the liquid collection hopper 7. The return water end of the pressure-boosting filter assembly is connected to the liquid storage tank 8. The liquid storage tank 8 is filled with 15% magnesium hydroxide composite agent and is equipped with a concentration monitoring sensor 20. The upper part of the purification tank 2 is connected to the exhaust duct 9. An axial flow fan 10 is installed at one end of the exhaust duct 9. A double-layer arc-shaped hot-dip galvanized steel mesh 11 is installed at the connection between the purification tank 2 and the exhaust duct 9 to intercept water mist. There is a large amount of treatment liquid water mist in the purification tank 2. The setting of the arc-shaped hot-dip galvanized steel mesh 11 allows large molecule water mist to adhere to the steel mesh and flow downward under the action of gravity, which can effectively avoid the non-working loss of a large amount of alkaline treatment liquid water mist and improve the overall efficiency of the treatment system. A pressure sensor 12 is installed inside the purification chamber 2 to monitor the internal pressure and adjust the power of the axial flow fan 10 based on the detection results, thereby ensuring that the pressure inside the purification chamber 2 remains in a relatively stable negative pressure state, further ensuring the exhaust efficiency of the diesel generator unit. The exhaust gas from the diesel generator is introduced into the purification chamber 2 through the intake pipe 1, and the exhaust gas is evenly sprayed into the purification chamber 2 through the diverter 4 and the jet pipe 5. During this process, an alkaline solution (15% magnesium hydroxide composite agent) is pressurized into the spray assembly by the liquid supply booster pump 6, and further sprayed onto the packing layer 25 through the spray assembly, so that the nitrogen monoxide, nitrogen dioxide, and sulfur dioxide in the exhaust gas are reduced. The alkaline water mist in the purification chamber 2 and the packing layer 25, along with particulate matter, comes into contact with the purification chamber 2. Utilizing the physicochemical properties of the alkaline water mist, it achieves purification of nitric oxide, nitrogen dioxide, sulfur dioxide, and particulate matter. The magnesium oxide (MgO) generated from the decomposition of magnesium hydroxide can catalyze the oxidation of NO to NO2. Furthermore, the active component in the composite agent undergoes a reduction reaction with NOx, generating nitrogen and water. The 15% magnesium hydroxide composite agent reacts with sulfur dioxide gas through an acid-base neutralization reaction to generate magnesium sulfate precipitate, achieving a desulfurization efficiency of over 85%, reducing the SO2 concentration after treatment to below 35 mg / Nm³. Simultaneously, the porous structure of magnesium oxide generated from the decomposition of magnesium hydroxide can physically adsorb PM2 in the flue gas.5. The collection efficiency is improved by 15-20%. Furthermore, during the purification process, the flue gas can be cooled simultaneously. Water mist flows downwards into the collection hopper 7 under gravity, and after being filtered by the pressurized filter assembly, the impurity-laden treatment liquid is returned to the storage tank 8, further improving the recycling efficiency of the treatment liquid. The axial flow fan 10 better ensures the air pressure stability within the purification chamber 2, ensuring smooth exhaust and better guaranteeing the operational stability and efficiency of the diesel generator set inside the civil defense project. In addition, a demister can be added at the connection point between the purification chamber 2 and the exhaust duct 9 to further reduce water mist loss.

[0017] In the specific implementation process, the above-mentioned spray assembly includes a mounting frame 13, an annular spray pipe 14, nozzles 15, and a liquid supply pipe 16. The mounting frame 13 is set inside the purification chamber 2. The annular spray pipe 14 is assembled and connected to the mounting frame 13 and is located above the jet pipe 5. The nozzles 15 are evenly installed on the lower side wall of the annular spray pipe 14 and the spray direction is directly facing the packing layer 25. One end of the liquid supply pipe 16 is connected to the annular spray pipe 14, and the other end is connected to the liquid supply booster pump 6. The pressurized filtration assembly includes a return liquid booster pump 17, a filter chamber 18, and a return liquid pipe 19. The inlet of the return liquid booster pump 17 is connected to the collection hopper 7. The filter chamber 18 is equipped with a high-temperature and corrosion-resistant stainless steel sintered mesh filter element. One end of the filter chamber 18 is connected to the outlet of the return liquid booster pump 17, and the other end is connected to the storage tank 8 through the return liquid pipe 19. The outer ring of the return liquid pipe 19 is welded with heat exchange fins. In use, the liquid supply booster pump at the top of the storage tank 8 is started. 6. Using the liquid supply booster pump 6, the 15% magnesium hydroxide composite agent in the storage tank 8 is extracted and pressurized, then injected into the annular spray pipe 14 through the liquid supply pipe 16, causing the 15% magnesium hydroxide composite agent to be sprayed out through the nozzle 15. Part of the atomized 15% magnesium hydroxide composite agent comes into direct contact with the flue gas, and part enters the packing layer 25 to come into contact with the flue gas. The packing layer 25 is preferably a honeycomb grid packing. The honeycomb grid packing can further increase the spray coverage area of ​​the alkaline treatment liquid water mist of the 15% magnesium hydroxide composite agent, and increase the contact area and frequency of the water mist with the flue gas. The water mist flows downward into the collection hopper 7 under the action of gravity. The return liquid booster pump 17 is started to extract the mixed liquid in the collection hopper 7, pressurize it and inject it into the filter chamber 18. The high temperature and corrosion resistant stainless steel sintered mesh filter element in the filter chamber 18 is used to filter out the precipitate and particulate impurities in the mixed liquid. The filtered solution further flows into the storage tank 8.

[0018] In the specific implementation process, as a preferred configuration, the bottom of the above-mentioned liquid storage tank 8 is provided with a drive mechanism 21, and the output end of the drive mechanism 21 is equipped with a stirring shaft 22. One end of the stirring shaft 22 is inserted into the liquid storage tank 8, and a stirring paddle 23 is fixedly mounted on the stirring shaft 22. The top of the liquid storage tank 8 is provided with a reagent filling port 24. During the circulation process, the 15% magnesium hydroxide composite agent will have solute loss. The concentration of the solution is monitored by the concentration monitoring sensor 20. When the concentration is lower than the set value, magnesium hydroxide composite agent can be added through the reagent filling port 24, and the drive mechanism 21 at the bottom of the liquid storage tank 8 is started. The drive mechanism 21 drives the stirring shaft 22 and the stirring paddle 23 to rotate, so that the added magnesium hydroxide composite agent dissolves quickly, so that the concentration of magnesium hydroxide composite agent in the liquid storage tank 8 is maintained at about 15%, ensuring the efficiency of flue gas purification treatment.

[0019] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0020] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flue gas purification mechanism for diesel generator in civil air defense engineering, comprising an air inlet pipe and a purification bin, one end of the air inlet pipe is in communication with the exhaust pipe of the diesel generator in the civil air defense engineering power generation room, the other end of the air inlet pipe extends into the purification bin and the opening direction is vertically downward, characterized in that, The air inlet pipe is connected to a diverter at its open end inside the purification chamber. Each port of the diverter is connected to a jet pipe with evenly spaced air vents on its side wall. Multiple spray assemblies are installed above the jet pipes, and a packing layer is installed below each spray assembly. One end of each spray assembly extends outside the purification chamber and is connected to a liquid supply booster pump. A liquid collection hopper is installed at the bottom of the purification chamber, and a booster filter assembly is connected to the lower part of the collection hopper. The return end of the booster filter assembly is connected to a liquid storage tank. An exhaust duct is connected to the upper part of the purification chamber, and an axial flow fan is installed at one end of the exhaust duct. A double-layer arc-shaped hot-dip galvanized steel mesh is installed at the connection between the purification chamber and the exhaust duct to intercept water mist. A pressure sensor is installed inside the purification chamber to monitor the internal pressure.

2. The flue gas purification mechanism for a diesel generator for civil defense projects according to claim 1, characterized in that, The spray assembly includes a mounting frame, an annular spray pipe, nozzles, and a liquid supply pipe. The mounting frame is located inside the purification chamber. The annular spray pipe is assembled and connected to the mounting frame and is located above the jet pipe. The nozzles are evenly installed on the lower side wall of the annular spray pipe and the spray direction is directly facing the packing layer. One end of the liquid supply pipe is connected to the annular spray pipe, and the other end is connected to the liquid supply booster pump.

3. The flue gas purification mechanism of the diesel generator for civil defense projects according to claim 1, characterized in that, The pressurized filtration assembly includes a return liquid booster pump, a filter chamber, and a return liquid pipe. The inlet of the return liquid booster pump is connected to the liquid collection hopper. The filter chamber is equipped with a high-temperature and corrosion-resistant stainless steel sintered mesh filter element. One end of the filter chamber is connected to the outlet of the return liquid booster pump, and the other end is connected to the liquid storage tank through the return liquid pipe. The outer ring surface of the return liquid pipe is welded with heat exchange fins.

4. The flue gas purification mechanism of the diesel generator for civil defense projects according to claim 1, characterized in that, The storage tank is filled with 15% magnesium hydroxide compound and is equipped with a concentration monitoring sensor.

5. The flue gas purification mechanism of the diesel generator for civil defense projects according to claim 4, characterized in that, The bottom of the liquid storage tank is equipped with a drive mechanism, and the output end of the drive mechanism is equipped with a stirring shaft. One end of the stirring shaft is inserted into the liquid storage tank, and a stirring paddle is fixedly mounted on the stirring shaft.

6. The flue gas purification mechanism for a diesel generator used in civil defense engineering according to claim 4, characterized in that, The top of the liquid storage tank is equipped with a drug filling port.

Images