Denitration purification furnace for waste incineration

Abstract

The invention relates to a denitration purification furnace for waste incineration in the field of material separation equipment, which is characterized in that through a rotating disc connected with a driving mechanism and two pairs of telescopic cylinders connected with a lifting plate and a bidirectional screw rod module, a catalytic core in a catalytic cylinder is quickly switched when ash removal and flushing are needed; a traditional mode that a catalytic core needs to be detached and cleaned after being polluted is replaced, the maintenance efficiency is improved, meanwhile, the catalytic core provided with grating holes and the flow guide core shaft arranged in the grating holes and provided with the flow guide rings are utilized, and when fluid flows in an annular gap formed by the grating holes and the flow guide core shaft, the flow guide ring is not prone to falling off. The fluid speed, direction and flow area are regularly changed, so that the contact effect of reactants and flushing fluid with catalytic substances on the inner walls of the grating holes is improved, and the catalytic reaction efficiency and the flushing effect of the flushing fluid are improved.

Description

Technical Field

[0001] The invention relates to a denitration purification furnace, in particular to a denitration purification furnace for garbage incineration applied in the field of material separation equipment. Background Art

[0002] A denitrification furnace is a device specially used to remove nitrogen oxides (NOx) produced during the combustion process. Its conceptual structure mainly includes a denitrification reactor, a denitrification catalyst, denitrification auxiliary equipment and a control system. In principle, it uses technologies such as selective catalytic reduction (SCR) or non-selective catalytic reduction (SNCR) to convert nitrogen oxides into harmless nitrogen and water through chemical reactions. Among them, SCR technology uses catalysts to promote the reduction reaction of ammonia or urea with nitrogen oxides, and is highly efficient and stable; while SNCR technology does not require a catalyst and is easy to operate, but the denitrification efficiency is relatively low.

[0003] When dealing with high-temperature smoke generated by incinerators, if selective catalytic reduction (SCR) technology is used, the flue gas must be dusted and cooled in advance through a dust collector and a heat exchanger before being introduced into the denitrification purification furnace. However, it is worth noting that it is difficult for a dust collector to completely remove fine particles in the smoke. As the catalytic reaction continues to advance, a large number of tiny smoke particles will be deposited on the inner wall of the catalyst grid holes, which will not only reduce the effective contact area between the flue gas and the catalyst, thereby affecting the catalytic efficiency, but also accelerate the poisoning process of the catalyst and cause the problem of excessive local temperature of the catalyst, which will have an adverse effect on the catalytic reaction efficiency and the service life of the catalyst.

[0004] The existing patent with publication number CN114558696B discloses a flue gas desulfurization, denitrification and dust removal purification device for a domestic waste incinerator and a purification method thereof, including a flue gas conveying pipeline assembly, a dust removal pipeline assembly, a dust suction mechanism and a purified gas discharge pipe, a first transmission assembly, a cleaning mechanism and a spraying mechanism. The dust removal pipeline assembly includes a dust removal pipeline body and a wind collecting hood. A plurality of first ventilation holes are opened on the surface of the wind collecting hood. The flue gas conveying pipeline assembly includes a first flue gas conveying pipeline body, a pressure pump and a second flue gas conveying pipeline body. The gas outlet end of the second flue gas conveying pipeline body is located in the dust removal pipeline body. The first transmission assembly includes a dust removal pipeline body, a pressure pump and a second flue gas conveying pipeline body. The air inlet end of the second flue gas conveying pipe body is connected to the exhaust port of the pressure pump, the air intake port of the pressure pump is connected to the first flue gas conveying pipe body, one end of the first transmission assembly is connected to the second flue gas conveying pipe body, and the other end of the first transmission assembly is connected to the cleaning mechanism and the spraying mechanism. This patent improves the dust removal effect in the flue gas by pre-treating the flue gas, but tiny particles will always remain in the flue gas. After long-term operation, the tiny particles will still contaminate the catalyst body. Therefore, a mechanism for cleaning the catalyst is needed to improve the cleanliness of the catalyst and extend the service life of the catalyst. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the flue gas entering the denitration purification furnace contains dust that is easy to adhere to the catalyst grid holes and affects the efficiency and life of the catalyst.

[0006] In order to solve the above problems, the present invention provides a denitration purification furnace for garbage incineration, comprising a furnace body; an upper partition and a lower partition arranged opposite to each other are arranged in the furnace body, a catalytic reaction mechanism is installed between the upper partition and the lower partition, the catalytic reaction mechanism comprises a rotating disk rotatably connected to the inner wall of the furnace body, the rotating disk is connected to a driving mechanism driving the rotating disk, a plurality of catalytic cylinders distributed in a circumference are fixedly connected to the rotating disk, and two pairs of telescopic cylinders symmetrically arranged on the upper and lower sides of the rotating disk;

[0007] Each pair of telescopic cylinders are vertically oppositely distributed and connected with the catalytic cylinders opposite to them by clamping. The two telescopic cylinders located on the upper part of the catalytic cylinder are fixedly connected to the same lifting plate located on the upper side, and the two telescopic cylinders located below the catalytic cylinder are fixedly connected to the same lifting plate located on the lower side. The two lifting plates on the upper and lower sides are connected to the same bidirectional screw module. The two pairs of telescopic cylinders that are symmetrical on both sides are driven to move closer to or away from the catalytic cylinder through the bidirectional screw module and the two lifting plates. At the same time, the driving mechanism drives the rotating disk to rotate, so as to realize the rotation of the catalytic cylinder on the rotating disk and the connection and separation with the two pairs of telescopic cylinders.

[0008] The catalytic cylinder includes a cylinder body and a catalytic core embedded in the cylinder body. The catalytic core is provided with a plurality of evenly distributed grille holes, a flow guide core shaft is embedded in the grille holes, a plurality of vertically equidistantly arranged flow guide rings are fixedly connected to the outer wall of the flow guide core shaft, a disc portion abutting against the grille holes is provided at both ends of the flow guide core shaft, and a plug-in cylinder fixedly connected thereto is provided at both upper and lower ends of the cylinder body;

[0009] Both upper and lower ends of the cylinder are provided with a convergence cavity which is connected to the grille hole and has a diameter smaller than that of the catalytic core. An annular gap with a regularly changing flow cross-sectional area is formed between the outer wall of the guide core shaft and the inner wall of the grille hole. The disc portion is provided with a plurality of inner through holes which penetrate the disc portion and connect the annular gap and the convergence cavity. The cylinder is provided with an outer through hole which connects the convergence cavity and the inner cavity of the plug-in cylinder. The inner cavity of the plug-in cylinder is connected to the opposite telescopic cylinder.

[0010] The pair of telescopic cylinders located on the right side are respectively the second telescopic cylinder below the catalytic cylinder and the third telescopic cylinder above the catalytic cylinder. A smoke inlet pipe is connected below the second telescopic cylinder, and the smoke inlet pipe is connected to the exhaust pipe of the external incinerator; the smoke inlet pipe is connected to an ammonia feed pipe located below the second telescopic cylinder, and the ammonia feed pipe is connected to an external ammonia feed pump. Ammonia and flue gas are mixed in the smoke inlet pipe located below the second telescopic cylinder, and then injected into the catalytic cylinder through the second telescopic cylinder. The third telescopic cylinder extends to above the upper partition and is connected to the cavity of the furnace body located above the upper partition, and the upper end of the furnace body is connected to a smoke exhaust pipe;

[0011] The pair of telescopic cylinders located on the left side are a pair of first telescopic cylinders located on the upper and lower sides of the catalytic cylinder respectively and with the same structure. The upper end of the first telescopic cylinder located above the catalytic cylinder extends to above the upper partition and is connected to a liquid inlet pipe, which is connected to an external flushing liquid delivery pump, and the external flushing liquid delivery pump is connected to an external flushing liquid storage tank; the first telescopic cylinder located below the catalytic cylinder extends to below the lower partition and is connected to a sewage pipe, which is connected to an external wastewater tank.

[0012] In the above-mentioned denitrification purification furnace for waste incineration, rapid switching and cleaning of the catalytic cylinder is achieved through a rotating disk and a liftable telescopic cylinder.

[0013] As a further improvement of the present application, the guide core shaft is provided with a hollow cavity distributed along its central axis and passing through itself, a multi-way tube extending into the cylinder body and connected with the hollow cavity is provided on the inner side of the plug-in cylinder, the first telescopic cylinder and the second telescopic cylinder are both provided with a bridge sealing plate abutting against the outer end opening of the multi-way tube, the bridge sealing plate of the second telescopic cylinder passes through a water inlet pipe connected with the multi-way tube, the water inlet pipe passes through the second telescopic cylinder and extends to the outside of the smoke inlet pipe, and the water inlet pipe is connected with an external cooling water feed pump.

[0014] As a further improvement of the present application, the first telescopic cylinder, the second telescopic cylinder and the third telescopic cylinder all adopt a telescopic sleeve structure.

[0015] As a further improvement of the present application, the rotating disk is a disc-shaped structure with a mounting hole on the surface, the cylinder passes through the mounting hole and is fixedly connected to the rotating disk by bolts, the rotating disk is rotatably connected to a mounting disk fixedly connected to the inner wall of the furnace body, the mounting disk is a fan-shaped disk with a rotating groove, the outer wall of the rotating disk is fixedly connected to a gear ring, the driving mechanism includes a driving gear meshing with the gear ring and a driving motor connected to the driving gear, the bidirectional screw module includes a bidirectional screw passing through a pair of lifting plates distributed upper and lower and a screw motor connected to the bidirectional screw, the bidirectional screw is rotatably connected to the upper partition and the lower partition, and the screw motor is installed below the lower partition.

[0016] As a further improvement of the present application, the catalytic core is a columnar structure and the grid holes are columnar holes, the guide core shaft is a round rod structure, and the guide ring is a circular ring structure with a vertical isosceles trapezoidal cross-section.

[0017] As a further improvement of the present application, a demister is provided in the cavity of the furnace body located above the upper partition, and the demister includes a mounting shell with openings at upper and lower ends and a condensation plate installed in the openings, the condensation plate has a vertical wavy structure, and the lower end of the condensation plate is sleeved with a water collecting pipe fixedly connected to the inner wall of the opening of the mounting shell, the water collecting pipe is fixedly connected to a drain pipe extending to the outside of the furnace body, and the drain pipe is connected to an external recovery tank.

[0018] As a further improvement of the present application, the surface of the guide core shaft is sprayed with a heat-conductive and corrosion-resistant coating, which is made of one of diamond, graphite or silver metal material coatings. An infrared temperature sensor fixedly connected to the lifting plate is provided on the outside of the catalytic cylinder on the right.

[0019] As a further improvement of the present application, both the first telescopic cylinder and the second telescopic cylinder are provided with a columnar cavity connected to the inner cavity of the plug-in cylinder, and the bridge sealing plate is a strip plate passing through the central axis of the columnar cavity, and the width of the strip plate is greater than the inner diameter of the lower end opening of the multi-way tube, and the multi-way tube includes a plurality of branch pipes that pass through the outer through hole and are fixedly connected to the outer end of the guide core shaft, and the diameter of the branch pipes is smaller than the inner diameter of the outer through hole.

[0020] To summarize, the present invention uses a rotating disk connected to a driving mechanism and two pairs of telescopic cylinders connected to a lifting plate and a bidirectional screw module to enable the catalytic core in the catalytic cylinder to be quickly switched when cleaning and flushing is required, thereby replacing the traditional method of disassembling and cleaning the catalytic core after being contaminated, saving maintenance time and improving maintenance efficiency. At the same time, by utilizing a catalytic core with grille holes and a guide core shaft arranged in the grille holes and provided with a guide ring, when a mixture of flue gas and ammonia water flows in the annular gap formed by the grille holes and the guide core shaft, the fluid velocity, direction and flow area change regularly, thereby improving the contact effect between the mixture of flue gas and ammonia water and the catalytic substance on the inner wall of the grille holes and improving the catalytic reaction efficiency. At the same time, by utilizing the annular gap with regularly changing flow cross-sectional area, when flushing dust adhered to the inner wall of the grille holes, the flushing liquid is in full contact with the inner wall of the grille holes, thereby improving the flushing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the three-dimensional structure of this application;

[0022] Figure 2 It is a schematic diagram of the internal structure of the furnace body in this application;

[0023] Figure 3 Schematic diagram of the three-dimensional structure of the catalytic reaction mechanism in this application;

[0024] Figure 4 This is a schematic diagram of the transverse cross-sectional structure of the present application;

[0025] Figure 5 for Figure 4 A schematic diagram of the enlarged structure at A in the middle;

[0026] Figure 6 for Figure 4 A schematic diagram of the enlarged structure at B in the middle;

[0027] Figure 7 This is a schematic diagram of the cooperation between the fixed cylinder and the sliding cylinder in this application;

[0028] Figure 8 for Figure 4 Schematic diagram of the enlarged structure at C in the middle;

[0029] Fig. 9 It is a schematic cross-sectional structure diagram of the catalytic cartridge in this application;

[0030] Fig.10 for Fig. 9 Schematic diagram of the enlarged structure at D in the middle;

[0031] Fig.11 for Fig. 9 Schematic diagram of the enlarged structure at E in the middle;

[0032] Fig.12 This is a schematic diagram of the internal structure of the cylinder in this application;

[0033] Fig.13 This is a schematic diagram of the explosion assembly structure of the catalytic cylinder in this application;

[0034] Fig.14 It is a schematic diagram of the three-dimensional structure of the guide core shaft in this application.

[0035] Description of the numbers in the figure:

[0036] 1. Furnace body; 2. Upper baffle; 3. Lower baffle; 4. Catalytic reaction mechanism; 5. Rotating plate; 6. Catalytic cylinder; 7. Driving mechanism; 8. Telescopic cylinder; 801. First telescopic cylinder; 802. Second telescopic cylinder; 803. Third telescopic cylinder; 804. Bridge blocking plate; 805. Fixed cylinder; 806. Sliding cylinder; 9. Lifting plate; 10. Bidirectional screw module; 11. Mounting plate; 12. Cylinder; 1201. Converging cavity; 1202. External through hole; 13. Catalytic Core; 1301, grille hole; 14, guide core shaft; 1401, disc part; 1402, inner through hole; 1403, guide ring; 1404, hollow cavity; 15, multi-way pipe; 16, plug-in cylinder; 17, smoke inlet pipe; 18, ammonia feed pipe; 19, water inlet pipe; 20, liquid inlet pipe; 21, sewage pipe; 22, demister; 23, smoke exhaust pipe; 24, mounting shell; 25, condensation plate; 26, water collecting pipe; 27, drain pipe; 28, infrared temperature sensor. DETAILED DESCRIPTION

[0037] The following describes two implementation modes of the present application in detail with reference to the accompanying drawings.

[0038] The first implementation method:

[0039] Figure 1-7A denitration purification furnace for waste incineration is shown, comprising a furnace body 1; an upper partition 2 and a lower partition 3 are arranged opposite to each other in the furnace body 1, a catalytic reaction mechanism 4 is installed between the upper partition 2 and the lower partition 3, the catalytic reaction mechanism 4 comprises a rotating disk 5 rotatably connected to the inner wall of the furnace body 1, the rotating disk 5 is connected to a driving mechanism 7 driving the rotating disk 5 to rotate, a plurality of catalytic cylinders 6 distributed in a circumference are fixedly connected to the rotating disk 5, and two pairs of telescopic cylinders 8 symmetrically arranged on the upper and lower sides of the rotating disk 5;

[0040] Each pair of telescopic cylinders 8 is vertically oppositely distributed and connected with the catalytic cylinders 6 opposite to them by clamping. The two telescopic cylinders 8 located on the upper part of the catalytic cylinder 6 are fixedly connected to the same lifting plate 9 located on the upper side, and the two telescopic cylinders 8 located below the catalytic cylinder 6 are fixedly connected to the same lifting plate 9 located on the lower side. The two lifting plates 9 on the upper and lower sides are connected to the same bidirectional screw module 10. The two pairs of telescopic cylinders 8 that are symmetrical on both sides are driven to move closer to or away from the catalytic cylinder 6 through the bidirectional screw module 10 and the two lifting plates 9. At the same time, the driving mechanism 7 drives the rotating disk 5 to rotate, so as to realize the rotation of the catalytic cylinder 6 on the rotating disk 5 and the connection and separation with the two pairs of telescopic cylinders 8;

[0041] The catalytic cylinder 6 includes a cylinder body 12 and a catalytic core 13 nested in the cylinder body 12. The catalytic core 13 is provided with a plurality of evenly distributed grille holes 1301. A flow guide core shaft 14 is nested in the grille holes 1301. A plurality of vertically equidistantly arranged flow guide rings 1403 are fixedly connected to the outer wall of the flow guide core shaft 14. Both ends of the flow guide core shaft 14 are provided with disc portions 1401 abutting against the grille holes 1301. Both upper and lower ends of the cylinder body 12 are provided with plug-in cylinders 16 fixedly connected thereto.

[0042] The upper and lower ends of the cylinder 12 are provided with a convergence cavity 1201 which is connected to the grille hole 1301 and has a diameter smaller than that of the catalytic core 13. An annular gap with a regularly changing flow cross-sectional area is formed between the outer wall of the guide core shaft 14 and the inner wall of the grille hole 1301. The disc portion 1401 is provided with a plurality of inner through holes 1402 which penetrate the disc portion 1401 and connect the annular gap and the convergence cavity 1201. The cylinder 12 is provided with an outer through hole 1202 which connects the convergence cavity 1201 and the inner cavity of the plug-in cylinder 16. The inner cavity of the plug-in cylinder 16 is connected to the opposite telescopic cylinder 8.

[0043] The pair of telescopic cylinders 8 located on the right side are respectively a second telescopic cylinder 802 located below the catalytic cylinder 6 and a third telescopic cylinder 803 located above the catalytic cylinder 6. A smoke inlet pipe 17 is connected below the second telescopic cylinder 802, and the smoke inlet pipe 17 is connected to the exhaust pipe of the external incinerator; the smoke inlet pipe 17 is located below the second telescopic cylinder 802 and is connected to an ammonia water feeding pipe 18, and the ammonia water feeding pipe 18 is connected to an external ammonia water feeding pump. Ammonia water and flue gas are mixed in the smoke inlet pipe 17 located below the second telescopic cylinder 802, and then injected into the catalytic cylinder 6 through the second telescopic cylinder 802. The third telescopic cylinder 803 extends to above the upper partition 2 and is connected to the cavity of the furnace body 1 located above the upper partition 2. The upper end of the furnace body 1 is connected to a smoke exhaust pipe 23;

[0044] The pair of telescopic cylinders 8 located on the left side are a pair of first telescopic cylinders 801 located on the upper and lower sides of the catalytic cylinder 6 and having the same structure. The upper end of the first telescopic cylinder 801 located above the catalytic cylinder 6 extends to above the upper partition 2 and is connected to a liquid inlet pipe 20, which is connected to an external flushing liquid delivery pump, and the external flushing liquid delivery pump is connected to an external flushing liquid storage tank; the first telescopic cylinder 801 located below the catalytic cylinder 6 extends to below the lower partition 3 and is connected to a sewage pipe 21, which is connected to an external wastewater tank.

[0045] For details, please refer to Figure 5 and Figure 6 In normal operation, the smoke from the incinerator is injected into the smoke inlet pipe 17, and the ammonia water as a reducing agent is injected into the smoke inlet pipe 17 through the ammonia water feeding pipe 18. The smoke and the ammonia water are mixed and injected into the catalyst cylinder 6 on the right side through the second telescopic cylinder 802, and then react in the catalyst cylinder 6. After the reaction, it is discharged into the cavity above the upper partition 2 through the third telescopic cylinder 803, and then discharged through the smoke exhaust pipe 23;

[0046] More specifically, the mixture of flue gas and ammonia water flows through the second telescopic cylinder 802 and flows into the plug-in cylinder 16 located below, then flows into the converging chamber 1201 through the outer through hole 1202, and then flows into the annular gap between the grille hole 1301 and the guide core shaft 14 through the inner through hole 1402. Under the action of the guide ring 1403, the mixture of flue gas and ammonia water changes the flow velocity, flow direction and mixing volume multiple times in the annular gap with a regularly changing flow cross-sectional area, so that the mixture of flue gas and ammonia water is fully in contact with the catalytic substance on the surface of the grille hole 1301, thereby improving the reaction catalytic efficiency.

[0047] When the inner wall of the annular gap needs to be cleaned, please refer to Figure 5 and Figure 6 , and then remove the dust impurities adhering to the inner wall of the grille hole 1301, including the following steps:

[0048] Step 1, closing the smoke inlet pipe 17 and the ammonia water feed pipe 18;

[0049] Step 2, switching the catalytic cylinder 6; first, start the bidirectional screw module 10, the bidirectional screw module 10 drives a pair of lifting plates 9 distributed up and down to move away from the catalytic cylinder 6, and then drives the two pairs of telescopic cylinders 8 to break contact with the catalytic cylinder 6, then the driving mechanism 7 drives the rotating disk 5 to rotate, the rotating disk 5 rotates the catalytic cylinder 6 on the right to between the pair of first telescopic cylinders 801 on the left, and the catalytic cylinder 6 on the left to between the second telescopic cylinder 802 and the third telescopic cylinder 803 on the right; then, turn off the driving mechanism 7 and start the bidirectional screw module 10 again, so that the four telescopic cylinders 8 are respectively connected with the corresponding catalytic cylinders 6;

[0050] Step three, start the smoke inlet pipe 17 and the ammonia water feed pipe 18, so that the catalyst cylinder 6 on the right side performs catalytic reaction again, and at the same time, start the external flushing liquid delivery pump, and inject the flushing liquid into the catalyst cylinder 6 through the liquid inlet pipe 20 through the first telescopic cylinder 801 located on the upper left side, and then the flushing liquid enters the annular gap to flush the inner wall of the grille hole 1301, and then the sewage generated by the flushing is discharged into the sewage pipe 21 through the first telescopic cylinder 801 at the lower left side, and then discharged into the external waste liquid tank, until the specified flushing time is reached, and the external flushing delivery pump is turned off;

[0051] It should be noted that, since the annular gap is a gap with a regularly changing flow cross-sectional area, the flushing liquid, under the action of the guide ring 1403, continuously changes the flow velocity, flow direction and flow area, thereby improving the cleaning effect on the inner wall of the grille hole 1301;

[0052] Step 4: cyclically execute the above steps 1 to 3 to realize the cyclic replacement and flushing cleaning of multiple catalytic cylinders 6.

[0053] Compared with the traditional denitrification purification furnace for waste incineration, the present invention uses a rotating disk 5 connected to a driving mechanism 7 and two pairs of telescopic cylinders connected to a lifting plate 9 and a bidirectional screw module 10, so that the catalytic core 13 in the catalytic cylinder 6 can be quickly switched when it needs to be cleaned and flushed, instead of the traditional method of disassembling and cleaning the catalytic core after being contaminated, saving maintenance time and improving maintenance efficiency. At the same time, by using the catalytic core 13 with a grille hole 1301 and a guide core shaft 14 arranged in the grille hole 1301 and provided with a guide ring 1403, when the mixture of flue gas and ammonia water flows in the annular gap formed by the grille hole 1301 and the guide core shaft 14, the fluid velocity, direction and flow area change regularly, thereby improving the contact effect between the mixture of flue gas and ammonia water and the catalytic substance on the inner wall of the grille hole 1301 and improving the catalytic reaction efficiency; at the same time, by using the annular gap with a regularly changing flow cross-sectional area, when flushing the dust adhering to the inner wall of the grille hole 1301, the flushing liquid is fully in contact with the inner wall of the grille hole 1301, thereby improving the flushing effect.

[0054] See also Figure 3-6 A pair of first telescopic cylinder 801, second telescopic cylinder 802 and third telescopic cylinder 803 are all telescopic sleeve structures and include a fixed cylinder 805 and a sliding cylinder 806 that are slidably connected to each other. The fixed cylinder 805 of the first telescopic cylinder 801 and the third telescopic cylinder 803 located on the upper side of the catalytic cylinder 6 are both fixedly connected to the upper partition 2, and the sliding cylinder 806 of the first telescopic cylinder 801 and the third telescopic cylinder 803 located on the upper side of the catalytic cylinder 6 are both fixedly connected to the lifting plate 9 located on the upper side. The fixed cylinder 805 of the first telescopic cylinder 801 and the second telescopic cylinder 803 located on the lower side of the catalytic cylinder 6 are both fixedly connected to the lower partition 3, and the sliding cylinder 806 of the first telescopic cylinder 801 and the second telescopic cylinder 802 located on the lower side of the catalytic cylinder 6 are both fixedly connected to the lifting plate 9 located on the lower side.

[0055] Specifically, a pair of lifting plates 9 moves in the same direction or in opposite directions under the drive of the bidirectional screw module 10, and the pair of lifting plates 9 drives the sliding cylinder 806 of the telescopic cylinder 8 to slide up and down, so that the sliding cylinder 806 contacts or disengages from the plug-in cylinder 16, thereby realizing the connection and disconnection between the telescopic cylinder 8 and the catalytic cylinder 6.

[0056] See also Figure 3 and Figure 4 The rotating disk 5 is a disc-shaped structure with a mounting hole on the surface. The cylinder 12 passes through the mounting hole and is fixedly connected to the rotating disk 5 by bolts. The rotating disk 5 is rotatably connected to a mounting disk 11 fixedly connected to the inner wall of the furnace body 1. The mounting disk 11 is a fan-shaped disk with a rotating groove. The outer wall of the rotating disk 5 is fixedly connected to a gear ring. The driving mechanism 7 includes a driving gear meshing with the gear ring and a driving motor connected to the driving gear. The bidirectional screw module 10 includes a bidirectional screw running through a pair of lifting plates 9 distributed up and down and a screw motor connected to the bidirectional screw. The bidirectional screw is rotatably connected to the upper partition 2 and the lower partition 3, and the screw motor is installed below the lower partition 3.

[0057] Specifically, the screw motor drives the bidirectional screw to rotate, and the bidirectional screw drives a pair of lifting plates 9 distributed up and down to move toward or away from each other, and the pair of lifting plates 9 drives the telescopic cylinder 8 and the catalytic cylinder 6 installed thereon to perform plug-in and disconnect operations; at the same time, the driving motor drives the rotating disk 5 to rotate through the driving gear, and the mounting disk 11 limits the rotating disk 5, so that the rotating disk 5 can stably perform circular motion in the furnace body 1.

[0058] See also Figure 5 , the catalyst core 13 is a columnar structure and the grid holes 1301 are columnar holes.

[0059] Specifically, it is convenient to realize the injection of flue gas and ammonia water.

[0060] See also Figure 5The guide core shaft 14 is a round rod-shaped structure, and the guide ring 1403 is a circular ring-shaped structure with a vertical isosceles trapezoidal cross section.

[0061] Specifically, the fluid flowing through the annular gap is periodically guided and squeezed by the guide ring 1403, thereby improving the contact effect between the flue gas and ammonia water mixed reactants and the catalytic material on the inner wall of the catalyst core 13 and the flushing effect of the flushing liquid.

[0062] Second implementation method:

[0063] Figure 4-6 and Figure 8-13 A denitrification purification furnace for waste incineration is shown. On the basis of the first embodiment, the guide core shaft 14 is provided with a hollow cavity 1404 distributed along its central axis and penetrating itself, and the inner side of the plug-in cylinder 16 is provided with a multi-way tube 15 extending into the cylinder body 12 and communicating with the hollow cavity 1404. The first telescopic cylinder 801 and the second telescopic cylinder 802 are both provided with a bridge sealing plate 804 abutting against the outer end opening of the multi-way tube 15. The bridge sealing plate 804 of the second telescopic cylinder 802 is penetrated by a water inlet pipe 19 communicating with the multi-way tube 15. The water inlet pipe 19 penetrates the second telescopic cylinder 802 and extends to the outside of the smoke inlet pipe 17. The water inlet pipe 19 is connected to an external cooling water feed pump.

[0064] See also Figure 4 The surface of the guide core shaft 14 is sprayed with a heat-conducting and corrosion-resistant coating, and an infrared temperature sensor 28 fixedly connected to the lifting plate 9 is provided on the outer side of the catalyst cylinder 6 located on the right.

[0065] For details, please refer to Figure 5 , Figure 6 and Fig.10 The temperature of the catalytic tube 6 undergoing catalytic reaction is monitored by the infrared temperature sensor 28. When the reaction temperature of the catalytic tube 6 exceeds the set reaction temperature threshold range, the external cooling water delivery pump is started to inject cooling water into the multi-way tube 15 through the water inlet pipe 19, and then injected into the hollow cavity 1404 of the guide core shaft 14 through the multi-way tube 15, so as to cool the inner wall of the catalytic core 13 and control the catalytic reaction temperature, thereby improving the catalytic reaction efficiency, reducing the poisoning and failure of the catalytic core 13, and extending the service life of the catalytic core 13. At the same time, the cooling water does not directly mix with the reactants in the grille hole 1301 in the catalytic core 13, and does not affect the concentration of the catalytic reactants, that is, the cooling, catalytic and flushing operations do not interfere with each other. It should be noted that the thermally conductive and corrosion-resistant coating is a diamond, graphite or silver metal coating material, which improves the thermal conductivity and ammonia corrosion resistance of the guide core shaft 14.

[0066] Compared with the traditional denitrification purification furnace for waste incineration, the present invention has a guide core shaft 14 with a hollow cavity 1404 cut inside the grille hole 1301, so that the cooling water is evenly distributed in the catalytic core 13, and the guide core shaft 14 made of heat-conducting material quickly absorbs and removes heat, thereby improving the effect and efficiency of temperature regulation.

[0067] See also Figure 5 and Figure 6 Both the first telescopic cylinder 801 and the second telescopic cylinder 802 are provided with a columnar cavity connected to the inner cavity of the plug-in cylinder 16. The bridge sealing plate 804 is a strip plate passing through the central axis of the columnar cavity. The width of the strip plate is greater than the inner diameter of the lower end opening of the multi-way tube 15.

[0068] Specifically, during flushing, the multi-way tube 15 is sealed by the bridge sealing plate 804 of the first telescopic cylinder 801 to prevent the flushing liquid from entering the hollow cavity 1404 of the guide core shaft 14 .

[0069] See also Figure 4 and Figure 8 A demister 22 is provided in the cavity of the furnace body 1 located above the upper partition 2. The demister 22 includes a mounting shell 24 with openings at upper and lower ends and a condensation plate 25 installed in the opening. The condensation plate 25 is a vertical wavy structure. The lower end of the condensation plate 25 is sleeved with a water collecting pipe 26 fixedly connected to the inner wall of the opening of the mounting shell 24. The water collecting pipe 26 is fixedly connected to a drainage pipe 27 extending to the outside of the furnace body 1, and the drainage pipe 27 is connected to an external recovery tank.

[0070] Specifically, the moisture in the high-temperature flue gas, ammonia water and the moisture in the reaction products are mixed in the cavity above the upper partition 2, and then the mixture is condensed on the surface of the condensation plate 25. The condensed water droplets slide down along the surface of the condensation plate 25, and the condensed water is collected through the water collecting pipe 26 to recover the water in the catalytic reaction products.

[0071] It should be noted that there is no bridge sealing plate 804 in the third telescopic cylinder 803. The cooling water flows through the hollow cavity 1404 of the guide core shaft 14 and is discharged into the third telescopic cylinder 803 to mix with the catalytic reactants. The cooling water is vaporized at high temperature and mixed with the reaction products. The reaction products also have water products. The cooling water and the water products are condensed at the demister 22 to contact and dissolve the residual ammonia in the reaction products. The solubility of ammonia in water is relatively large. The large surface area of ​​the condensation plate 25 is utilized to allow the ammonia to fully contact with the condensed water. The condensed water containing ammonia is collected through the water collecting pipe 26 and the drain pipe 27 to realize the recovery of ammonia, reduce the discharge of ammonia, and improve production safety.

[0072] See also Fig.11 and Fig.13The multi-channel tube 15 includes a plurality of branch tubes penetrating the outer through hole 1202 and fixedly connected to the outer end of the guide core shaft 14 , and the diameter of the branch tube is smaller than the inner diameter of the outer through hole 1202 .

[0073] Specifically, by providing a multi-way pipe 15 with multiple branch pipes, a flow gap for smoke flow is formed between the branch pipes and the outer through hole 1202, which does not affect the smoke from entering the annular gap, and the cooling operation and the catalytic intake operation do not interfere with each other.

[0074] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A denitrification purification furnace for garbage incineration, characterized in that: The invention comprises a furnace body (1); an upper partition (2) and a lower partition (3) arranged opposite to each other in the upper and lower parts of the furnace body (1); a catalytic reaction mechanism (4) is installed between the upper partition (2) and the lower partition (3); the catalytic reaction mechanism (4) comprises a rotating disk (5) rotatably connected to the inner wall of the furnace body (1); the rotating disk (5) is connected to a driving mechanism (7) for driving the rotating disk (5) to rotate; a plurality of catalytic cylinders (6) distributed in a circumference are fixedly connected to the rotating disk (5); and two pairs of telescopic cylinders (8) symmetrically arranged on the upper and lower sides of the rotating disk (5); Each pair of telescopic cylinders (8) is vertically arranged opposite to each other and connected to the catalytic cylinders (6) opposite to each other by means of a clamping connection. The two telescopic cylinders (8) located above the catalytic cylinder (6) are fixedly connected to the same lifting plate (9) located on the upper side. The two telescopic cylinders (8) located below the catalytic cylinder (6) are fixedly connected to the same lifting plate (9) located on the lower side. The two lifting plates (9) on the upper and lower sides are connected to the same bidirectional screw module (10). The bidirectional screw module (10) and the two lifting plates (9) drive the two pairs of telescopic cylinders (8) symmetrically on both sides to move toward or away from the catalytic cylinder (6). At the same time, the driving mechanism (7) drives the rotating disk (5) to rotate, thereby realizing the rotation of the catalytic cylinder (6) on the rotating disk (5) and the connection and separation with the two pairs of telescopic cylinders (8). The catalytic cylinder (6) comprises a cylinder body (12) and a catalytic core (13) nested in the cylinder body (12); a plurality of evenly distributed grille holes (1301) are provided on the catalytic core (13); a flow guide core shaft (14) is nested in the grille holes (1301); a plurality of vertically equidistantly arranged flow guide rings (1403) are fixedly connected to the outer wall of the flow guide core shaft (14); both ends of the flow guide core shaft (14) are provided with disc portions (1401) abutting against the grille holes (1301); and both upper and lower ends of the cylinder body (12) are provided with plug-in cylinders (16) fixedly connected thereto; The upper and lower ends of the cylinder (12) are provided with a convergence cavity (1201) which is connected to the grille hole (1301) and has a diameter smaller than the diameter of the catalytic core (13); an annular gap with a regularly changing flow cross-sectional area is formed between the outer wall of the guide core shaft (14) and the inner wall of the grille hole (1301); a plurality of inner through holes (1402) penetrating the disc portion (1401) and connecting the annular gap and the convergence cavity (1201) are provided on the disc portion (1401); an outer through hole (1202) connecting the convergence cavity (1201) and the inner cavity of the plug-in cylinder (16) is provided on the cylinder (12); and the inner cavity of the plug-in cylinder (16) is connected to the opposite telescopic cylinder (8); The pair of telescopic cylinders (8) located on the right side are respectively a second telescopic cylinder (802) below the catalytic cylinder (6) and a third telescopic cylinder (803) above the catalytic cylinder (6). A smoke inlet pipe (17) is connected below the second telescopic cylinder (802), and the smoke inlet pipe (17) is connected to the exhaust pipe of the external incinerator; the smoke inlet pipe (17) is connected to an ammonia water feeding pipe (18) located below the second telescopic cylinder (802), and the ammonia water feeding pipe (18) is connected to an external ammonia water feeding pump. Ammonia water and smoke are mixed in the smoke inlet pipe (17) below the second telescopic cylinder (802), and then injected into the catalytic cylinder (6) through the second telescopic cylinder (802); the third telescopic cylinder (803) extends to above the upper partition (2) and is connected to the cavity of the furnace body (1) located above the upper partition (2); the upper end of the furnace body (1) is connected to a smoke exhaust pipe (23); The pair of telescopic cylinders (8) located on the left side are a pair of first telescopic cylinders (801) located on the upper and lower sides of the catalytic cylinder (6) and having the same structure. The upper end of the first telescopic cylinder (801) located above the catalytic cylinder (6) extends to the upper side of the upper partition (2) and is connected to a liquid inlet pipe (20). The liquid inlet pipe (20) is connected to an external flushing liquid delivery pump. The external flushing liquid delivery pump is connected to an external flushing liquid storage tank. The first telescopic cylinder (801) located below the catalytic cylinder (6) extends to the lower side of the lower partition (3) and is connected to a sewage discharge pipe (21). The sewage discharge pipe (21) is connected to an external wastewater tank.

2. A denitrification purification furnace for waste incineration according to claim 1, characterized in that: The guide core shaft (14) is provided with a hollow cavity (1404) distributed along its central axis and penetrating the guide core shaft; a multi-way tube (15) extending into the cylinder body (12) and communicating with the hollow cavity (1404) is provided on the inner side of the plug-in tube (16); a bridge sealing plate (804) abutting against the outer end opening of the multi-way tube (15) is provided inside the first telescopic tube (801) and the second telescopic tube (802); a water inlet pipe (19) communicating with the multi-way tube (15) is penetrated through the bridge sealing plate (804) of the second telescopic tube (802); the water inlet pipe (19) penetrates the second telescopic tube (802) and extends to the outside of the smoke inlet pipe (17); the water inlet pipe (19) is communicated with an external cooling water feed pump.

3. A denitration purification furnace for waste incineration according to claim 1, characterized in that: The first telescopic cylinder (801), the second telescopic cylinder (802) and the third telescopic cylinder (803) all adopt a telescopic sleeve structure.

4. A denitration purification furnace for waste incineration according to claim 1, characterized in that: The rotating disk (5) is a disk-shaped structure with a mounting hole on its surface. The cylinder (12) passes through the mounting hole and is fixedly connected to the rotating disk (5) by bolt fixing. The rotating disk (5) is rotatably connected to a mounting disk (11) fixedly connected to the inner wall of the furnace body (1). The mounting disk (11) is a fan-shaped disk with a rotating groove. The outer wall of the rotating disk (5) is fixedly connected to a gear ring. The driving mechanism (7) includes a driving gear meshing with the gear ring and a driving motor connected to the driving gear. The bidirectional screw module (10) includes a bidirectional screw that passes through a pair of lifting plates (9) distributed up and down and a screw motor connected to the bidirectional screw. The bidirectional screw is rotatably connected to the upper partition (2) and the lower partition (3). The screw motor is installed below the lower partition (3).

5. The denitrification purification furnace for waste incineration according to claim 1, characterized in that: The catalytic core (13) is a columnar structure and the grid holes (1301) are columnar holes, the flow guide core shaft (14) is a round rod structure, and the flow guide ring (1403) is a circular ring structure with a vertical isosceles trapezoidal cross section.

6. A denitration purification furnace for waste incineration according to claim 1, characterized in that: The furnace body (1) is provided with a demister (22) in a cavity located above the upper partition (2). The demister (22) comprises a mounting shell (24) with upper and lower openings and a condensation plate (25) mounted in the opening. The condensation plate (25) is in a vertical wavy structure. The lower end of the condensation plate (25) is sleeved with a water collecting pipe (26) fixedly connected to the inner wall of the opening of the mounting shell (24). The water collecting pipe (26) is fixedly connected to a drainage pipe (27) extending to the outside of the furnace body (1). The drainage pipe (27) is connected to an external recovery tank.

7. A denitrification purification furnace for waste incineration according to claim 2, characterized in that: The surface of the guide core shaft (14) is sprayed with a heat-conducting and corrosion-resistant coating, which is made of one of diamond, graphite or silver metal coatings. An infrared temperature sensor (28) fixedly connected to the lifting plate (9) is provided on the outside of the catalyst cylinder (6) on the right side.

8. A denitration purification furnace for waste incineration according to claim 2, characterized in that: Both the first telescopic cylinder (801) and the second telescopic cylinder (802) are provided with a columnar cavity connected to the inner cavity of the plug-in cylinder (16); the bridge sealing plate (804) is a strip plate passing through the central axis of the columnar cavity; the width of the strip plate is greater than the inner diameter of the lower opening of the multi-way tube (15); the multi-way tube (15) includes a plurality of branch pipes penetrating the outer through hole (1202) and fixedly connected to the outer end of the guide core shaft (14); the diameter of the branch pipes is smaller than the inner diameter of the outer through hole (1202).

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