Desulfurizing absorption tower device

Abstract

The utility model relates to the technical field of wet flue gas desulfurization of coal-fired power plants, in particular to a desulfurization absorption tower device. The utility model provides a desulfurizing absorption tower device which comprises a desulfurizing absorption tower, and a demister washing layer and a slurry spraying layer are arranged in the desulfurizing absorption tower; the demister washing layer is arranged above the slurry spraying layer; the slurry spraying layer comprises four spraying main pipes which are arranged in a crossed mode, each spraying main pipe is provided with a plurality of spraying branch pipes with two-way hollow nozzles, and high-pressure washing assemblies are installed at the tail ends of the spraying main pipes. According to the technical scheme provided by the utility model, the high-pressure flushing assembly is arranged at the tail end of the spraying branch pipe of the slurry spraying layer, so that when the desulfurizing absorption tower runs, the slurry circulating pump only needs to be stopped and the high-pressure flushing assembly is opened, the slurry deposited at the spraying pipe and the nozzle of the slurry circulating pump can be removed in time, and the utilization rate of the slurry circulating pump is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wet flue gas desulfurization in coal-fired power plants, in particular to a desulfurization absorption tower device. Background Art

[0002] In the ultra-low emission transformation project of the desulfurization system of a thermal power plant, in order to ensure that the pollutant SO2 meets the emission standards, it is necessary to increase the liquid-gas ratio, that is, to increase the number of slurry circulation pumps. However, when the unit is in a low load and low inlet sulfur condition, the number of starts of the larger slurry circulation pump will be significantly reduced. If the unit is in this state for a long time, the slurry in the branch pipes, main pipes, and nozzles of the spray layer arranged at a high position will continue to deposit, and the untreated flue gas in the lower spray layer will continue to react with the slurry here to generate a mixture of CaSO4·2H2O and CaSO3˙1 / 2H2O. If the pump is not started for a long time to flush the residual materials in the pipeline, scaling will occur. The scaling phenomenon inside the nozzle is particularly serious, which greatly reduces the output of the slurry circulation pump and the sulfur dioxide removal efficiency, and there is a risk of excessive pollutant emissions. After blockage, the pollutant concentration can only be controlled by increasing the liquid-gas ratio and increasing the slurry supply, which greatly increases the operating cost of the desulfurization system; the spray branch pipes and nozzles blocked by scaling can only be manually cleaned in the absorption tower after the unit is shut down, which affects the maintenance period and increases the safety risk of personnel operations, which is not conducive to the smooth progress of the maintenance work. Utility Model Content

[0003] The utility model aims to provide a desulfurization absorption tower device, which installs a high-pressure flushing component at the end of the spray branch pipe of the slurry spray layer. When the desulfurization absorption tower is in operation, it only needs to stop the slurry circulation pump and open the high-pressure flushing component to timely remove the precipitated slurry in the spray pipe and nozzle of the slurry circulation pump, thereby improving the utilization rate of the slurry circulation pump.

[0004] The utility model provides a desulfurization absorption tower device, comprising: a desulfurization absorption tower, wherein a demister flushing layer and a slurry spraying layer are arranged in the desulfurization absorption tower;

[0005] The demister flushing layer is arranged above the slurry spraying layer;

[0006] The slurry spraying layer comprises four cross-arranged spraying main pipes, each of which is provided with a plurality of spraying branch pipes with bidirectional hollow nozzles, and a high-pressure flushing assembly is installed at the end of the spraying main pipe.

[0007] Preferably, the high-pressure flushing assembly comprises a high-pressure flushing water pipe;

[0008] One end of the high-pressure flushing water pipe extends into the interior of the end of the spray main pipe.

[0009] Further preferably, one end of the high-pressure flushing water pipe away from the spray branch pipe passes through the desulfurization absorption tower through a connecting pipe.

[0010] Further preferably, a water spray hole is provided on the high-pressure flushing water pipe.

[0011] Further preferably, the water spray holes are evenly arranged around the high-pressure flushing water pipe.

[0012] Further preferably, the high-pressure flushing assembly includes a valve, and the valve is installed on one end of the high-pressure flushing water pipe passing through the desulfurization absorption tower.

[0013] Further preferably, the high-pressure flushing assembly also includes a flow meter, and the flow meter is installed on the high-pressure flushing water pipe.

[0014] Preferably, the desulfurization absorption tower device further comprises a flushing water collecting device, wherein the flushing water collecting device comprises an absorption tower slurry pool, and the absorption tower slurry pool is arranged below the slurry spray layer.

[0015] Preferably, the desulfurization absorption tower device further comprises a slurry circulation pump, and the slurry circulation pump is connected to the slurry spraying layer.

[0016] Preferably, the desulfurization absorption tower further includes a raw flue and a clean flue;

[0017] The original flue is located in the middle of the slurry pool of the absorption tower and the alloy tray, and the end of the original flue is connected to the tower wall of the desulfurization absorption tower;

[0018] The clean flue is a connecting component between the top of the desulfurization absorption tower and the chimney. The initial end of the clean flue is connected to the top of the desulfurization absorption tower, and the terminal end is connected to the chimney inlet.

[0019] Beneficial effects:

[0020] The technical solution of the utility model is to install a high-pressure flushing component at the end of the spray branch pipe of the slurry spray layer. When the desulfurization absorption tower is in operation, it is only necessary to stop the slurry circulation pump and turn on the high-pressure flushing component to promptly remove the precipitated slurry in the spray pipe and nozzle of the slurry circulation pump, thereby improving the utilization rate of the slurry circulation pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of the device of the utility model;

[0023] Figure 2 This is a cross-sectional view of the high-pressure flushing water pipe in the spray layer mother pipe of the utility model.

[0024] Description of reference numerals:

[0025] 1: Desulfurization absorption tower; 2: demister flushing layer; 3: slurry spraying layer; 301: spraying main pipe; 4: absorption tower slurry pool; 5: slurry circulation pump; 6: high-pressure flushing component; 601: high-pressure flushing water pipe; 602: water spray hole; 7: original flue; 8: clean flue. DETAILED DESCRIPTION

[0026] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] like Figure 1As shown, the utility model provides a desulfurization absorption tower device, which includes a desulfurization absorption tower 1, and a demister flushing layer 2 and a slurry spraying layer 3 are arranged in the desulfurization absorption tower 1. The demister flushing layer 2 is arranged above the slurry spraying layer 3. The slurry spraying layer 3 includes four cross-arranged spray mother pipes 301, each of which is provided with a plurality of spray branch pipes with bidirectional hollow nozzles, and a high-pressure flushing assembly 6 is installed at the end of the spray mother pipe 301.

[0030] By installing a high-pressure flushing component 6 at the end of the spray branch pipe of the slurry spray layer 3, when the desulfurization absorption tower 1 is in operation, it is only necessary to stop the slurry circulation pump 5 and turn on the high-pressure flushing component 6 to promptly remove the precipitated slurry at the spray pipe and nozzle of the slurry circulation pump 5, thereby improving the utilization rate of the slurry circulation pump 5.

[0031] The high-pressure flushing assembly 6 includes a high-pressure flushing water pipe 601, one end of which extends into the end of the spray main pipe 301, and the end of the high-pressure flushing water pipe 601 away from the spray branch pipe passes through the desulfurization absorption tower 1 through a connecting pipe.

[0032] The high-pressure flushing water pipe 601 is provided with water spray holes 602. The water spray holes 602 are evenly arranged around the high-pressure flushing water pipe 601. Specifically, in this embodiment, the high-pressure flushing water pipe 601 has an extension length of about 1 meter, 360° evenly opened holes, and an opening rate of about 40%-60%, which can ensure flushing pressure and coverage.

[0033] The high-pressure flushing assembly 6 includes a valve, which is installed on one end of the high-pressure flushing water pipe 601 passing through the desulfurization absorption tower 1. Specifically, in this embodiment, the valve is an electric regulating valve, which can be remotely operated by DCS.

[0034] The high-pressure flushing assembly 6 also includes a flow meter, which is installed on the high-pressure flushing water pipe 601.

[0035] The desulfurization absorption tower device also includes a flushing water collecting device, which includes an absorption tower slurry pool 4. The absorption tower slurry pool 4 is arranged below the slurry spray layer 3. The flushing water passes through the spray pipe and the alloy tray and directly falls into the absorption tower slurry pool 4 without the need for other liquid collecting devices.

[0036] The desulfurization absorption tower device further comprises a slurry circulation pump 5 , which is connected to the slurry spraying layer 3 .

[0037] The desulfurization absorption tower 1 also includes an original flue 7 and a clean flue 8. The original flue 7 is located in the middle of the absorption tower slurry pool 4 and the alloy tray, and the end of the original flue 7 is connected to the tower wall of the desulfurization absorption tower 1. The clean flue 8 is a connecting component between the top of the desulfurization absorption tower 1 and the chimney. The initial end of the clean flue 8 is connected to the top of the desulfurization absorption tower 1, and the end is connected to the chimney inlet.

[0038] It should be noted that, when in use, the main pipe of the stopped slurry circulation pump 5 is flushed for 5 minutes every two hours to promptly remove the residual slurry in the pipe and nozzle, while also avoiding clogging of the flushing water pipe spray hole 602.

[0039] The desulfurization absorption tower device can reduce the power consumption of the desulfurization system, reduce the amount of absorbent used, reduce the operating cost of the desulfurization system, and can also reduce the amount of overhaul and maintenance. During the unit shutdown period, it is only necessary to check the blockage of the flushing water pipe spray hole 602, without silting, and it will not pollute the platforms of the absorption tower spray layer, reducing the work of manual cleaning and transportation of sediment, and improving the overhaul efficiency and the level of civilized and hygienic management of equipment.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A desulfurization absorption tower device, characterized in that: include: A desulfurization absorption tower, wherein the desulfurization absorption tower is provided with a demister flushing layer and a slurry spraying layer; The demister flushing layer is arranged above the slurry spraying layer; The slurry spraying layer comprises four cross-arranged spraying main pipes, each of which is provided with a plurality of spraying branch pipes with bidirectional hollow nozzles, and a high-pressure flushing assembly is installed at the end of the spraying main pipe.

2. The desulfurization absorption tower device according to claim 1, characterized in that: The high-pressure flushing assembly includes a high-pressure flushing water pipe; One end of the high-pressure flushing water pipe extends into the interior of the end of the spray main pipe.

3. The desulfurization absorption tower device according to claim 2, characterized in that: One end of the high-pressure flushing water pipe away from the spray branch pipe passes through the connecting pipe and out of the desulfurization absorption tower.

4. The desulfurization absorption tower device according to claim 2, characterized in that: The high-pressure flushing water pipe is provided with a water spray hole.

5. The desulfurization absorption tower device according to claim 4, characterized in that: The water spray holes are evenly arranged around the high-pressure flushing water pipe.

6. The desulfurization absorption tower device according to claim 2, characterized in that: The high-pressure flushing assembly includes a valve, and the valve is installed on one end of the high-pressure flushing water pipe passing through the desulfurization absorption tower.

7. The desulfurization absorption tower device according to claim 2, characterized in that: The high-pressure flushing component also includes a flow meter, which is installed on the high-pressure flushing water pipe.

8. The desulfurization absorption tower device according to claim 1, characterized in that: The desulfurization absorption tower device also includes a flushing water collecting device, and the flushing water collecting device includes an absorption tower slurry pool, and the absorption tower slurry pool is arranged below the slurry spray layer.

9. The desulfurization absorption tower device according to claim 1, characterized in that: The desulfurization absorption tower device also includes a slurry circulation pump, and the slurry circulation pump is connected to the slurry spraying layer.

10. The desulfurization absorption tower device according to claim 1, characterized in that: The desulfurization absorption tower also includes an original flue and a clean flue; The original flue is located in the middle of the slurry pool of the absorption tower and the alloy tray, and the end of the original flue is connected to the tower wall of the desulfurization absorption tower; The clean flue is a connecting component between the top of the desulfurization absorption tower and the chimney. The initial end of the clean flue is connected to the top of the desulfurization absorption tower, and the terminal end is connected to the chimney inlet.

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