Flue gas denitration device for garbage incineration power generation

Abstract

The utility model discloses a flue gas denitration device for garbage incineration power generation. The flue gas denitration device comprises a main body structure, the main body structure comprises a filtering bin and a denitration bin, a gas inlet pipe is arranged at the lower end of the outer wall of one side of the filtering bin, and a gas outlet pipe is arranged at the lower end of the outer wall of one side of the denitration bin; the filtering assembly is arranged in the filtering bin; the filter assembly comprises a filter screen plate mounted in the filter bin; the denitration assembly is arranged in the denitration bin; the denitration assembly comprises a spraying pipe and a catalysis net basket, the spraying pipe and the catalysis net basket are installed in the denitration bin and used for spraying a urea solution, a plurality of sets of branch pipes are arranged on the outer wall of the spraying pipe in a surrounding mode, spraying heads are installed at the ends of the branch pipes, the upper end of the catalysis net basket is fixedly connected to the inner top of the denitration bin, and the catalysis net basket surrounds the spraying pipe. Not only can the good denitration effect of the equipment be ensured, but also the blockage caused by the accumulation of large-particle impurities in the equipment can be avoided, and the practical value is relatively high.

Description

Technical Field

[0001] The utility model relates to the technical field of denitration equipment, in particular to a flue gas denitration device for power generation by burning garbage. Background Art

[0002] Waste incineration power generation can realize the resource utilization of waste. After the incinerated waste is processed, a variety of energy can be obtained. The high-temperature steam generated by combustion can drive the steam turbine to generate electricity for urban use. At the same time, the heat generated during the combustion process can also be used for heating, recycling, etc. In this way, the energy contained in the garbage can be fully utilized, the dependence on traditional energy can be reduced, and the energy utilization efficiency can be improved.

[0003] When waste is incinerated to generate electricity, flue gas containing nitrogen oxides will be generated. If it is directly discharged, it will cause environmental pollution. After searching, the Chinese patent application number is: CN201610410776.X, which discloses a flue gas denitrification device, including: a shell, a reaction chamber is defined in the shell, and a flue gas inlet, a flue gas outlet and a discharge port connected to the reaction chamber are provided on the shell; a denitrification oxidant inlet pipe, the denitrification oxidant inlet pipe is connected to the reaction chamber to introduce a denitrification oxidant suitable for oxidizing nitrogen oxides in the flue gas into the reaction chamber; a spray device, at least a part of the spray device extends into the reaction chamber to spray an absorbent suitable for absorbing oxidized nitrogen oxides into the reaction chamber; a packing layer, the packing layer is arranged in the reaction chamber and is located between the spray device and the flue gas outlet to mix the oxidized flue gas and the absorbent. It can improve the denitrification efficiency, reduce the consumption and cost of the denitrification oxidant, and also simplify the structure of the flue gas denitrification device, which is easy to install and use and occupies a small area.

[0004] The above technical solution still has a defect, that is, it lacks the filtering function of flue gas. The flue gas generated by garbage incineration contains large particles of impurities. Direct denitrification effect is poor and may also cause large particles of impurities to accumulate in the equipment and cause blockage. Therefore, we need to propose a flue gas denitrification device for garbage incineration power generation. Utility Model Content

[0005] The purpose of the utility model is to provide a flue gas denitrification device for power generation by burning garbage. The device has a simple structure and is easy to use. After the flue gas passes through the filter bin, large particles of impurities are filtered out before entering the denitrification bin for denitrification treatment. It can ensure that the equipment has a good denitrification effect and avoid the accumulation of large particles of impurities inside the equipment to cause blockage. It has high practical value and can solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A flue gas denitrification device for burning garbage for power generation, comprising:

[0008] Main structure;

[0009] The main structure includes a filter chamber and a denitration chamber, an air inlet pipe is arranged at the lower end of the outer wall of one side of the filter chamber, an air outlet pipe is arranged at the lower end of the outer wall of one side of the denitration chamber, and the upper ends of the outer walls of the filter chamber and the denitration chamber are connected through a connecting pipe;

[0010] A filter assembly disposed in the filter chamber;

[0011] The filter assembly includes a filter screen installed in the filter bin;

[0012] A denitration component disposed in a denitration bin;

[0013] The denitrification component includes a spray pipe and a catalytic basket installed in a denitrification bin for spraying urea solution. A plurality of branch pipes are arranged around the outer wall of the spray pipe, and nozzles are installed at the ends of the branch pipes. The upper end of the catalytic basket is fixedly connected to the inner top of the denitrification bin, and the catalytic basket is surrounded by the outside of the spray pipe.

[0014] Preferably, a clamping ring is provided on the inner wall of the filter bin, the filter screen plate is clamped inside the clamping ring, and a top cover is installed on the top of the filter bin.

[0015] Preferably, a connecting rod is welded to the lower end of the top cover, and an annular pressing plate is welded to the lower end of the connecting rod, and the bottom surface of the pressing plate is in contact with the top surface of the filter screen plate.

[0016] Preferably, a bracket is welded on the top of the denitration bin, a solution tank for storing urea solution is arranged on the upper end of the bracket, and a pump body is installed at the bottom of the solution tank inside the bracket.

[0017] Preferably, the liquid inlet end of the pump body is connected to the inner bottom of the solution tank through a pipeline, and the liquid outlet end of the pump body is connected to the upper end of the spray pipe through a pipeline.

[0018] Preferably, a collecting hopper for collecting waste liquid is provided at the bottom of the denitrification bin, and a drain pipe is provided at the bottom of the collecting hopper.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] The utility model is provided with a main structure including a filter bin and a denitrification bin. A filter assembly including a filter mesh plate is arranged in the filter bin. A denitrification mechanism including a spray pipe and a catalytic basket is arranged in the denitrification bin. The device has a simple structure and is easy to use. After the flue gas passes through the filter bin, large particles of impurities are filtered out and then enters the denitrification bin for denitrification treatment. This can ensure that the equipment has a good denitrification effect and can avoid the accumulation of large particles of impurities inside the equipment to cause blockage. The utility model has high practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the filter bin of the utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the denitration bin of the utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the denitrification component of the utility model.

[0025] In the figure: 1. Filter chamber; 2. Denitrification chamber; 3. Inlet pipe; 4. Connecting pipe; 5. Outlet pipe; 6. Filter screen; 7. Top cover; 8. Solution tank; 9. Pump body; 10. Collection bucket; 11. Drain pipe; 12. Spray pipe; 13. Nozzle; 14. Catalytic basket; 15. Clamp ring; 16. Pressure plate; 17. Connecting rod. DETAILED DESCRIPTION

[0026] 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.

[0027] See also Figure 1-4 , the utility model provides a technical solution:

[0028] A flue gas denitrification device for burning garbage for power generation, comprising:

[0029] Main structure; The main structure includes a filter chamber 1 and a denitration chamber 2. An air inlet pipe 3 is provided at the lower end of the outer wall of one side of the filter chamber 1, and an air outlet pipe 5 is provided at the lower end of the outer wall of one side of the denitration chamber 2. The upper ends of the outer walls of the filter chamber 1 and the denitration chamber 2 are connected through a connecting pipe 4;

[0030] A filter assembly is arranged in the filter chamber 1; the filter assembly includes a filter screen plate 6 installed in the filter chamber 1;

[0031] A denitration component is arranged in the denitration bin 2; the denitration component includes a spray pipe 12 and a catalytic basket 14 installed in the denitration bin 2 for spraying urea solution, a plurality of groups of branch pipes are arranged around the outer wall of the spray pipe 12, a nozzle 13 is installed at the end of the branch pipe, the upper end of the catalytic basket 14 is fixedly connected to the inner top of the denitration bin 2, and the catalytic basket 14 is surrounded by the outside of the spray pipe 12.

[0032] A bracket is welded on the top of the denitration bin 2, and a solution tank 8 for storing urea solution is arranged on the upper end of the bracket. A pump body 9 is installed at the bottom of the solution tank 8 in the bracket. The liquid inlet end of the pump body 9 is connected to the inner bottom of the solution tank 8 through a pipeline, and the liquid outlet end of the pump body 9 is connected to the upper end of the spray pipe 12 through a pipeline. A collecting bucket 10 for collecting waste liquid is arranged at the bottom of the denitration bin 2, and a drain pipe 11 is arranged at the bottom of the collecting bucket 10.

[0033] By setting a main structure including a filter bin 1 and a denitration bin 2, a filter assembly including a filter screen plate 6 is set in the filter bin 1, and a denitration mechanism including a spray pipe 12 and a catalytic basket 14 is set in the denitration bin 2. In actual use, the high-temperature flue gas generated by garbage incineration power generation enters the filter bin 1 through the air inlet pipe 3, and large particle impurities can be filtered out when the flue gas passes through the filter screen plate 6. The purified flue gas enters the denitration bin 2 through the connecting pipe 4, and the pump body 9 extracts the urea solution in the solution tank 8 for spraying. Since the flue gas has a sufficiently high temperature, the high-temperature flue gas will decompose into ammonia (NH3) and carbon dioxide (CO2) when it contacts the urea solution. Under the action of the catalyst on the catalytic basket 14, ammonia and nitrogen oxides react to form nitrogen (N2) and water (H2O). Carbon dioxide and nitrogen are discharged through the outlet pipe 5 along with the denitrated flue gas, and the waste water is discharged through the collecting bucket 10 and the drain pipe 11, thereby achieving the purpose of flue gas denitration.

[0034] Among them, the filter mesh plate 6 is set to an integrated mesh plate of porous activated carbon material, the skeleton of the catalytic mesh basket 14 is a metal mesh basket, and the metal mesh basket is coated with a catalyst made of metal oxide material. The catalyst can be specifically set to one of titanium dioxide (TiO2), aluminum oxide (Al2O3) or silicon dioxide (SiO2).

[0035] Among them, see Figure 4 Since the catalytic basket 14 surrounds the spray pipe 12 in a ring shape, and multiple groups of nozzles 13 are distributed on the spray pipe 12, the flue gas entering the denitrification bin 2 can fully contact the urea solution, and at the same time, the product can fully contact the catalyst, thereby having a higher denitrification efficiency.

[0036] In general, the device has a simple structure and is easy to use. After the flue gas passes through the filter chamber 1, large particles of impurities are filtered out and then enter the denitrification chamber 2 for denitrification treatment. This can not only ensure that the equipment has a good denitrification effect, but also avoid the accumulation of large particles of impurities inside the equipment to cause blockage, and has high practical value.

[0037] See also Figure 2 In order to facilitate the installation, use, disassembly and cleaning of the filter screen plate 6 in the filter bin 1, the present application makes the following design:

[0038] A clamp ring 15 is provided on the inner wall of the filter bin 1, and the filter screen plate 6 is clamped inside the clamp ring 15. A top cover 7 is installed on the top of the filter bin 1. A connecting rod 17 is welded to the lower end of the top cover 7, and an annular pressing plate 16 is welded to the lower end of the connecting rod 17. The bottom surface of the pressing plate 16 abuts against the top surface of the filter screen plate 6.

[0039] When installing the filter screen plate 6, open the top cover 7, place the filter screen plate 6 in the clamp ring 15, and then close the top cover 7. At this time, the pressing plate 16 is attached to the top of the filter screen plate 6, and the pressing plate 16 and the inner wall of the clamp ring 15 are in sliding sealing cooperation. Since the filter screen plate 6 is tightly attached to the inner bottom of the clamp ring 15 and the bottom of the pressing plate 16 respectively, the flue gas entering the filter chamber 1 can only enter the denitration chamber 2 after passing through the filter screen plate 6;

[0040] After using for a period of time, the filter screen plate 6 can be replaced and cleaned by opening the top cover 7, which is convenient for the staff to quickly install, use, disassemble and replace the filter screen plate 6, thereby improving the working efficiency of the equipment.

[0041] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A flue gas denitrification device for waste incineration power generation, characterized in that: include: Main structure; The main structure comprises a filter chamber (1) and a denitration chamber (2); an air inlet pipe (3) is arranged at the lower end of an outer wall on one side of the filter chamber (1); an air outlet pipe (5) is arranged at the lower end of an outer wall on one side of the denitration chamber (2); and the upper ends of the outer walls of the filter chamber (1) and the denitration chamber (2) which are adjacent to each other are connected via a connecting pipe (4); A filter assembly arranged in the filter chamber (1); The filter assembly comprises a filter screen plate (6) installed in the filter bin (1); A denitration component disposed in a denitration bin (2); The denitration component comprises a spray pipe (12) and a catalytic basket (14) installed in a denitration bin (2) for spraying urea solution, wherein a plurality of branch pipes are arranged around the outer wall of the spray pipe (12), and nozzles (13) are installed at the ends of the branch pipes, and the upper end of the catalytic basket (14) is fixedly connected to the inner top of the denitration bin (2), and the catalytic basket (14) surrounds the outside of the spray pipe (12).

2. A flue gas denitrification device for waste incineration power generation according to claim 1, characterized in that: A clamping ring (15) is provided on the inner wall of the filter bin (1), the filter screen plate (6) is clamped inside the clamping ring (15), and a top cover (7) is installed on the top of the filter bin (1).

3. A flue gas denitrification device for waste incineration power generation according to claim 2, characterized in that: A connecting rod (17) is welded to the lower end of the top cover (7), and an annular pressing plate (16) is welded to the lower end of the connecting rod (17), wherein the bottom surface of the pressing plate (16) contacts the top surface of the filter screen plate (6).

4. A flue gas denitrification device for waste incineration power generation according to claim 1, characterized in that: A bracket is welded on the top of the denitration bin (2), a solution tank (8) for storing urea solution is arranged on the upper end of the bracket, and a pump body (9) is installed at the bottom of the solution tank (8) in the bracket.

5. A flue gas denitrification device for waste incineration power generation according to claim 4, characterized in that: The liquid inlet end of the pump body (9) is connected to the inner bottom of the solution tank (8) through a pipeline, and the liquid outlet end of the pump body (9) is connected to the upper end of the spray pipe (12) through a pipeline.

6. The flue gas denitrification device for waste incineration power generation according to claim 1, characterized in that: A collecting bucket 1 (0) for collecting waste liquid is provided at the bottom of the denitration bin (2), and a drainage pipe 1 (1) is provided at the bottom of the collecting bucket (10).

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