Incineration tail gas denitration auxiliary device

Abstract

The utility model relates to the technical field of urea solution denitration, in particular to an incineration tail gas denitration auxiliary device. The incineration tail gas denitration auxiliary device comprises a liquid storage cylinder, a plurality of metal corrugated pipes which are annularly distributed are installed on the liquid storage cylinder, and a plurality of atomization nozzles are installed on the metal corrugated pipes. The bottom of the liquid storage cylinder is provided with an adjusting component used for adjusting the spraying angle of the atomizing nozzle. According to the incineration tail gas denitration auxiliary device provided by the utility model, the design of the annularly distributed metal corrugated pipes and the multi-angle atomizing nozzles is adopted, and the diversion branch pipes are matched, so that the vertical and horizontal two-way coverage of urea solution in the flue is realized, the mixing efficiency of the urea solution and flue gas is obviously improved, the denitration blind area is reduced, and the denitration efficiency is improved. And the angle of the atomizing nozzle on the metal corrugated pipe is adjusted through the adjusting component, so that the spraying range is expanded, and the denitration requirements under different working conditions are met.

Description

Technical Field

[0001] This utility model relates to the field of urea solution denitrification technology, and in particular to an auxiliary device for denitrification of incineration tail gas. Background Technology

[0002] Incineration flue gas denitrification utilizes urea solution, primarily using urea as a reducing agent. Urea reacts chemically with nitrogen oxides in the flue gas, producing harmless nitrogen and water vapor, thus reducing the nitrogen oxide content. This process not only lowers the nitrogen oxide concentration in the flue gas but also reduces pollutant emissions, contributing to environmental protection. The method involves first adding urea to water and stirring thoroughly to prepare a urea solution of a specific concentration based on the nitrogen oxide concentration in the flue gas. The urea solution is then sprayed into the flue gas through an atomizing spray gun, ensuring thorough mixing of the reducing agent and the flue gas. The denitrification effect is improved by optimizing the reaction conditions for urea decomposition and nitrogen oxide reduction, such as reaction time and mixing degree.

[0003] However, the urea solution sprayed by the atomizing spray gun currently used is difficult to fully cover the flue, resulting in some flue gas not being able to chemically react with the urea solution, making it difficult to completely denitrify the exhaust gas from combustion.

[0004] Therefore, it is necessary to provide a new auxiliary device for denitrification of incineration exhaust gas to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides an auxiliary device for denitrification of incineration exhaust gas.

[0006] The incineration tail gas denitrification auxiliary device provided by this utility model includes a liquid storage tank, on which multiple annularly distributed metal corrugated pipes are installed, and each of the metal corrugated pipes is equipped with multiple atomizing nozzles.

[0007] The bottom of the liquid storage tank is provided with an adjustment component for adjusting the spray angle of the atomizing nozzle, and the adjustment component includes a rotating rod. The rotating rod is rotatably installed at the bottom of the liquid storage tank, and the middle section of the rotating rod is provided with a reciprocating threaded section. A threaded connecting sleeve is fitted on the reciprocating threaded section, and multiple annularly distributed connecting rods for external support or retraction of the atomizing nozzle are hinged on the threaded connecting sleeve. A rotating impeller is fixed at the bottom of the rotating rod.

[0008] Preferably, a metal water guide pipe is fixedly installed at the output end of the metal corrugated pipe, and two branch pipes are fixedly installed at the output end of the metal water guide pipe, with an atomizing nozzle fixedly installed on each branch pipe.

[0009] The angle between the two branch pipes is preferably 90-120 degrees, the output end of any one branch pipe is preferably 0-15 degrees in the vertical direction, and the output end of the other branch pipe is preferably 0-15 degrees in the horizontal direction.

[0010] The one end of the middle connecting rod is hingedly connected to the outer sleeve wall of the threaded connecting sleeve, and the other end of the middle connecting rod is hingedly connected to the metal water guide pipe on the corresponding metal bellows.

[0011] The bottom of the liquid storage cylinder is fixedly provided with two symmetrical limiting rods, and the two limiting rods are respectively inserted into the two sliding through holes of the threaded connecting sleeve and are in sliding connection with the sliding through holes.

[0012] The liquid storage cylinder is provided with a liquid inlet.

[0013] The top of the liquid storage cylinder is fixedly provided with a fixed support.

[0014] Compared with the related art, the incineration tail gas denitration auxiliary device has the following beneficial effects:

[0015] The metal bellows and the multi-angle atomizing nozzle are arranged in a ring shape, and cooperate with the branch pipes, so that the urea solution is vertically and horizontally covered in the flue, the mixing efficiency with the flue gas is improved, the denitration blind area is reduced, the angle of the atomizing nozzle on the metal bellows is adjusted through the adjusting component, the spraying range is expanded, and the denitration requirement under different working conditions is met. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 Fig. 1 is a structural schematic view of a preferred embodiment of the incineration tail gas denitration auxiliary device provided by the utility model;

[0017] Figure 2 Fig. 2 is another structural schematic view of a preferred embodiment of the incineration tail gas denitration auxiliary device provided by the utility model;

[0018] Figure 3 Fig. 3 is a connection structure schematic view of the metal bellows and the atomizing nozzle shown in Fig. 1. Figure 1 Fig. 1 is a structural schematic view of a preferred embodiment of the incineration tail gas denitration auxiliary device provided by the utility model;

[0019] Specific implementation

[0020] ​In order to make the utility model purposes, technical scheme and advantages more clearly, the following will be further described in detail with the drawings and examples.

[0021] The specific implementation of the utility model will be described in detail in combination with specific examples.

[0022] Please refer to Figures 1 to 3 The incineration tail gas denitration auxiliary device comprises a liquid storage cylinder 1, atomizing nozzles 3 and an adjusting component 4.

[0023] In the embodiment of the utility model, please refer to Figures 1 to 3 The top of the liquid storage cylinder 1 is fixedly provided with a fixed support 6, and the liquid storage cylinder 1 is provided with a liquid inlet interface 5, and a plurality of annularly distributed metal bellows 2 are arranged on the liquid storage cylinder 1, and a plurality of atomizing nozzles 3 are arranged on each metal bellows 2, specifically, the output end of the metal bellows 2 is fixedly provided with a metal water guide pipe 21, and the output end of the metal water guide pipe 21 is fixedly provided with two shunt branch pipes 22, and the atomizing nozzles 3 are fixedly arranged on each shunt branch pipe 22, and the bottom of the liquid storage cylinder 1 is provided with an adjusting component 4 for adjusting the spraying angle of the atomizing nozzles 3.

[0024] It should be noted that the fixed support 6 and the liquid storage cylinder 1 are hoisted in the flue by means of the fixed bolts, and the pipe for conveying urea solution is connected with the liquid inlet interface 5, so that the atomizing nozzles 3 are opened to spray the flue gas in the flue, since the atomizing nozzles 3 are arranged in a plurality of annularly distributed and arranged in a downward direction (offset ± 15°) and a horizontal direction (offset ± 15°), so that the mixing reaction of the urea solution and the flue gas in the flue is greatly improved, and the adjusting component 4 is used to effectively adjust the angle of the atomizing nozzles 3 on each metal bellows 2, so that the range of the atomizing nozzles 3 is greatly improved.

[0025] The application adopts the design of annularly distributed metal bellows 2 and multi-angle atomizing nozzles 3, cooperates with the shunt branch pipe 22 (included angle 90-120°), realizes the vertical and horizontal double-direction coverage of the urea solution in the flue, significantly improves the mixing efficiency with the flue gas, and reduces the denitration blind area.

[0026] In order to facilitate the installation of the equipment, a side opening for installing the fixed support 6 is formed in the flue, and a sealing door for sealing the side opening is arranged on the side opening, and a flat lock is arranged on the sealing door.

[0027] The centrifugal pump is arranged in the liquid storage cylinder 1 to provide stable pressure for the atomizing nozzles 3.

[0028] Further, the included angle between the two branch pipes 22 is 90-120°, the included angle between the output end of any one branch pipe 22 and the vertical direction is 0-15°, the included angle between the output end of the other branch pipe 22 and the horizontal direction is 0-15°, and the atomizing nozzles 3 on the two branch pipes 22 cooperate with each other to effectively enhance the spraying range of the atomizing nozzles 3.

[0029] In the embodiment of the utility model, please refer to Figures 1 to 3 , the bottom of the liquid storage cylinder 1 is provided with an adjusting component 4 for adjusting the spraying angle of the atomizing nozzle 3, and the adjusting component 4 comprises a rotating rod 41, the rotating rod 41 is rotatably installed at the bottom of the liquid storage cylinder 1, the middle rod section of the rotating rod 41 is provided with a reciprocating threaded section 43, a threaded connecting sleeve 44 is sleeved on the reciprocating threaded section 43, the bottom of the liquid storage cylinder 1 is fixedly installed with two symmetrical limiting rods 46, the two limiting rods 46 respectively pass through two sliding through holes formed in the threaded connecting sleeve 44 and are slidably connected with the sliding through holes, a plurality of annularly distributed middle connecting rods 45 for outward supporting or pulling back the atomizing nozzle 3 are hinged on the threaded connecting sleeve 44, one end of the middle connecting rod 45 is hinged with the sleeve wall of the threaded connecting sleeve 44, and the other end of the middle connecting rod 45 is hinged with the metal water guide pipe 21 on the corresponding metal corrugated pipe 2, and the bottom of the rotating rod 41 is fixedly provided with a rotating impeller 42.

[0030] It should be noted that: under the impact of the flue gas in the flue, the rotating impeller 42 is driven to rotate, thereby driving the rotating rod 41 to rotate, so that the threaded connecting sleeve 44 slides up and down along the reciprocating threaded section 43, since the middle connecting rod 45 on the threaded connecting sleeve 44 is hinged with the metal water guide pipe 21 on the metal corrugated pipe 2, and the metal corrugated pipe 2 has a certain flexibility, so it can be bent, and therefore the angle of the atomizing nozzle 3 on the metal corrugated pipe 2 can be adjusted, thereby expanding the spraying range to adapt to the denitration requirement under different working conditions.

[0031] It should be noted that: in order to eliminate the hidden danger that the adjusting component 4 may fail to function due to too low flow rate of flue gas, an auxiliary driving device can be additionally arranged in the bottom of the liquid storage cylinder 1 to drive the rotating rod 41 to rotate, such as a small high-temperature-resistant electric motor, to ensure stable operation of the adjusting function (the selection and model of the auxiliary driving device are selected by technical personnel according to the specific flue, which is not limited here), and the rotating impeller 42 is made of lightweight material (such as titanium alloy) or has an increased impeller area to improve the driving force under low flow rate;

[0032] The rotating rod 41, the reciprocating threaded section 43 and the middle connecting rod 45 are all made of high-temperature-resistant and corrosion-resistant ceramic coating or special alloy to prolong the service life.

[0033] The working principle of the auxiliary device for flue gas denitration provided by the utility model is as follows:

[0034] The liquid storage cylinder 1 is hoisted in the flue by the fixed support 6, and the pipe for conveying urea solution is connected with the liquid inlet interface 5, so that the atomizing nozzle 3 sprays the flue gas in the flue, since the atomizing nozzle 3 is arranged in a plurality of annular distribution, and the atomizing nozzle 3 arranged on each metal bellows 2 is arranged in a downward direction (offset ± 15°) and a horizontal direction (offset ± 15°), so that the mixing reaction of the urea solution and the flue gas in the flue is greatly improved, and the adjusting part 4 is used, specifically, the rotating impeller 42 is driven to rotate under the impact of the flue gas in the flue, so that the rotating rod 41 is rotated, so that the threaded connection sleeve 44 slides up and down along the reciprocating threaded section 43, since the middle connecting rod 45 on the threaded connection sleeve 44 is hinged with the metal water guide pipe 21 on the metal bellows 2, and the metal bellows 2 has a certain flexibility, so that it can be bent, so that the angle of the atomizing nozzle 3 on the metal bellows 2 can be adjusted, so as to expand the spraying range, so as to adapt to the denitration requirement under different working conditions,

[0035] The electrical components, circuits and controls involved in the utility model are all conventional prior art, and will not be described in detail here.

[0036] The above is only an embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent process conversion according to the content of the utility model specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection range of the utility model.

Claims

1. An auxiliary device for denitrification of incineration exhaust gas, characterized in that, It includes a liquid storage tank (1), on which multiple annularly distributed metal corrugated pipes (2) are installed, and each of the metal corrugated pipes (2) is equipped with multiple atomizing nozzles (3). The bottom of the liquid storage tank (1) is provided with an adjustment component (4) for adjusting the spray angle of the atomizing nozzle (3), and the adjustment component (4) includes a rotating rod (41). The rotating rod (41) is rotatably installed at the bottom of the liquid storage tank (1), and the middle section of the rotating rod (41) is provided with a reciprocating thread section (43). A threaded connecting sleeve (44) is sleeved on the reciprocating thread section (43), and multiple annularly distributed central connecting rods (45) for external support or pullback of the atomizing nozzle (3) are hinged on the threaded connecting sleeve (44). A rotating impeller (42) is fixed at the bottom of the rotating rod (41).

2. The incineration tail gas denitrification auxiliary device according to claim 1, characterized in that, The output end of the metal corrugated pipe (2) is fixedly installed with a metal water guide pipe (21), and the output end of the metal water guide pipe (21) is fixedly installed with two branch pipes (22), and each branch pipe (22) is fixedly installed with an atomizing nozzle (3).

3. The incineration tail gas denitrification auxiliary device according to claim 2, characterized in that, The included angle between the two branch pipes (22) is 90-120°, the included angle between the output end of any one branch pipe (22) and the included angle between the output end of the other ...

4. The incineration tail gas denitrification auxiliary device according to claim 2, characterized in that, One end of the central connecting rod (45) is hinged to the outer wall of the threaded connecting sleeve (44), and the other end of the central connecting rod (45) is hinged to the metal water guide pipe (21) on the corresponding metal corrugated pipe (2).

5. The incineration tail gas denitrification auxiliary device according to claim 1, characterized in that, Two symmetrically distributed limiting rods (46) are fixedly installed at the bottom of the liquid storage cylinder (1), and the two limiting rods (46) pass through the two sliding through holes opened in the threaded connecting sleeve (44) and are slidably connected to the sliding through holes.

6. The incineration tail gas denitrification auxiliary device according to claim 1, characterized in that, The liquid storage tank (1) is equipped with a liquid inlet (5).

7. The incineration tail gas denitrification auxiliary device according to claim 1, characterized in that, A fixed bracket (6) is fixedly installed on the top of the liquid storage cylinder (1).

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