Desulfurization micro-mist dust removal device

Abstract

The utility model provides a desulfurization micro-mist dust removal device. The desulfurization micro-mist dust removal device comprises at least one layer of micro-mist dust remover arranged in an absorption tower, each layer of micro-mist dust remover comprises a plurality of rows of micro-mist generators, each row of micro-mist generators consists of a plurality of micro-mist pipe modules, and the adjacent micro-mist pipe modules are fixedly connected; each micro-mist pipe module is provided with a plurality of sprayers, the sprayers are arranged on the lower half circle of the micro-mist pipe module, and the spraying direction is opposite to the flowing direction of smoke.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of flue gas desulfurization, and in particular to a desulfurization micro-mist dust removal device. BACKGROUND

[0002] The dust and mist removal equipment used at the rear end of the wet desulfurization process of a thermal power plant includes baffle mist eliminator (including flat plate type and ridge type), tube bundle mist eliminator and wet type electric dust collector, etc. The wet type electric dust collector has good dust and mist removal effect, but its construction cost and operation energy consumption are very high, so more ridge type mist eliminators are used for dust and mist removal.

[0003] At present, the ordinary load rate of the unit of the domestic thermal power plant is not high, and the unit is in long-term low load operation. When the load of the unit is low, the flue gas flow rate is reduced, the traditional mist eliminator is not in the best operating state, the dust and mist removal efficiency of the mist eliminator is obviously reduced, and it is impossible to ensure that the dust emission concentration at the outlet of the chimney is stably lower than 10 mg / Nm 3 of the national emission standard. Therefore, it is of great significance to improve the dust and mist removal effect of the mist eliminator under low load of the unit to finally realize stable and up-to-standard dust emission. SUMMARY

[0004] In order to achieve the above-mentioned purpose, the utility model provides a desulfurization micro-mist dust removal device, which comprises: at least one layer of micro-mist dust remover arranged in an absorption tower;

[0005] Each layer of micro-mist dust remover comprises a plurality of rows of micro-mist generators, each row of micro-mist generator is composed of a plurality of micro-mist pipe modules, and adjacent micro-mist pipe modules are fixedly connected; each micro-mist pipe module is provided with a plurality of sprayers, the sprayers are arranged in the lower half of the micro-mist pipe module, and the spraying direction is opposite to the flue gas flow direction.

[0006] Optionally, adjacent micro-mist pipe modules are fixedly connected through flanges, threads or clamps.

[0007] Optionally, the micro-mist pipe module is supplied with cooling water, and the water temperature of the cooling water ranges from 10 DEG C to 25 DEG C.

[0008] Optionally, the pipe diameter of the micro-mist pipe module ranges from DN80 to DN200.

[0009] Optionally, the sprayers are two or more, and the included angle a between adjacent sprayers ranges from 20 DEG to 90 DEG.

[0010] Optionally, the flow rate of a single sprayer is 100-1000 L / h.

[0011] Optionally, the atomized particle size of the sprayer ranges from 10 to 100 microns.

[0012] Optionally, the micro-fog dust remover is installed on the original support of the roof-type mist eliminator and located at the inlet of the roof-type mist eliminator; the micro-fog pipe module and the support of the roof-type mist eliminator are fixed by welding, bolt connection or buckle connection.

[0013] Compared with the prior art, the utility model at least has the following beneficial effects:

[0014] The sprayer is arranged in the lower half of the micro-fog pipe module, and the spraying direction is opposite to the flue gas flow direction.

[0015] By means of the temperature difference between the low-temperature micro-fog and the saturated wet flue gas, thermophoresis is induced to make the fine particles in the flue gas gather into large particles, which are easily captured by the roof-type mist eliminator.

[0016] The original support of the roof-type mist eliminator is ingeniously utilized to save the cost of newly-added support, compact layout saves the internal space of the absorption tower, and the system is optimized as a whole to improve the operation stability. BRIEF DESCRIPTION OF DRAWINGS

[0017] Other features, objects and advantages of the utility model will become more apparent through reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0018] Figure 1 Figure 1 is a front view of the vertical structure of the desulfurization micro-fog dust removal device according to an embodiment of the utility model;

[0019] Figure 2 Figure 2 is a sectional view of the A-A section of the vertical structure of the desulfurization micro-fog dust removal device according to the embodiment of the utility model; Figure 1

[0020] Figure 3 Figure 3 is a sectional view of the micro-fog pipe module.

[0021] Legend of the drawings:

[0022] 1-absorption tower; 2-roof-type mist eliminator; 3-micro-fog generator; 31-micro-fog pipe module; 32-sprayer; 4-mist eliminator support. DETAILED DESCRIPTION

[0023] ​The utility model will be described in detail below in combination with specific embodiments. The following embodiments will help the person skilled in the art to further understand the utility model, but do not limit the utility model in any form. It should be pointed out that, for those skilled in the art, without departing from the concept of the utility model, a number of changes and improvements can be made. These all belong to the protection scope of the utility model.

[0024] In order to make the drawing simple, only the parts related to the utility model are shown in the drawings, which do not represent the actual structure of the product. In addition, in order to make the drawing simple and easy to understand, in some drawings, only one of the components with the same structure or function is shown, or only one of them is marked. In this paper, "one" not only means "only one", but also means "more than one".

[0025] The device proposed by the utility model will be described in further detail below in combination with the drawings and specific embodiments. The advantages and features of the utility model will be clearer according to the following description and claims.

[0026] As Figure 1 shown, the desulfurization micro-fog dust removal device provided by the embodiment comprises two layers of micro-fog dust removers arranged in the absorption tower 1. In other embodiments, according to the flue gas flow, the flue gas temperature, the cooling water flow, the cooling water temperature, the diameter of the absorption tower 1 and the dust removal emission concentration requirement of the outlet of the absorption tower 1, the number of layers of the micro-fog dust remover can be one layer or three layers or more, and the specific number of layers is not limited here.

[0027] Each layer of micro-fog dust remover comprises several rows of micro-fog generators 3, and the number of rows of micro-fog generators 3 is determined comprehensively according to the above factors. Each row of micro-fog generators 3 is composed of several micro-fog pipe modules 31, as Figure 2 shown. The micro-fog pipe modules 31 are fixedly connected through flanges, threads or clamps, which is convenient for subsequent maintenance.

[0028] The saturated wet flue gas temperature is about 50℃, in order to make the saturated wet flue gas produce thermophoresis phenomenon, it is necessary to keep a certain temperature difference between the fog droplets generated by the utility model device and the saturated wet flue gas. Therefore, low-temperature cooling water is introduced into the micro-fog pipe module 31, and the cooling water temperature range is set to 10℃-25℃. This temperature range can not only maintain a larger temperature difference to enhance the strength of the thermophoresis reaction of the saturated wet flue gas, but also can reduce the operation and maintenance cost as much as possible.

[0029] After the cooling water is introduced into the micro-fog pipe module 31, the fine particle fog droplets are sprayed out through the atomizer 32. As Figure 3As shown, the sprayer 32 is arranged at the lower half of the micro-mist pipe module 31. In order to improve the reaction time of the micro-mist and the flue gas, the spraying direction of the sprayer 32 is opposite to the flow direction of the flue gas. For example, in the embodiment, the flue gas flows upward, and the spraying direction of the sprayer 32 is downward, and the two directions are opposite to each other to react.

[0030] The sprayer 32 is arranged in two or more, and three sprayers 32 are arranged in the embodiment. Figure 3 In other embodiments, the number of sprayers 32 can be adjusted according to specific conditions, which is not limited here. From the perspective of spraying effect and economic cost, the included angle α between the sprayers 32 is set to be in the range of 20°-90°. The flow rate of a single sprayer 32 is 100-1000L / h, and the droplet size generated by the sprayer 32 should not be too large, and the atomized particle size range is 10-100μm.

[0031] In order to effectively remove the large-particle-size particulate matter finally collected by the device, the micro-mist dust collector is arranged at the inlet position of each roof-type mist eliminator 2. In this way, the large-particle-size particulate matter in the flue gas treated by the micro-mist dust collector can be efficiently captured and removed by the roof-type mist eliminator 2, thereby realizing deep purification of the flue gas.

[0032] In order to save investment and reduce equipment installation space, the micro-mist dust collector is installed on the original support of the roof-type mist eliminator 2. This installation method fully utilizes the existing equipment resources, avoids additional investment due to the addition of a support structure, and also reduces the space required for equipment installation, thereby reducing the occupation of the internal space of the absorption tower.

[0033] The desulfurization micro-mist dust removal device provided by the utility model sprays a large amount of low-temperature micro-mist into the saturated wet flue gas, and the micro-mist and the saturated wet flue gas maintain a certain temperature difference, so that the saturated wet flue gas generates a thermophoresis phenomenon, and the fine particulate matter in the flue gas converges to form larger particles. The small-particle-size particulate matter is difficult to capture and treat, but the large-particle-size particulate matter collected can be captured and removed by the rear-end roof-type mist eliminator, thereby effectively improving the mist and dust removal effect of the entire desulfurization system. The improvement effect is more obvious under low load of the unit, which helps to realize stable and standard dust emission.

[0034] The specific embodiments of the utility model are described above. It should be understood that the utility model is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essential content of the utility model. The embodiments of the present application and the features in the embodiments can be combined with each other in any way without conflict.

Claims

1. A desulfurization micro-fog dust removal device, characterized in that, The application relates to a micro-fog deduster for a flue gas absorption tower. The micro-fog deduster comprises at least one layer of micro-fog dedusters arranged in the absorption tower. Each layer of the micro-fog dedusters comprises a plurality of rows of micro-fog generators, each row of the micro-fog generators is composed of a plurality of micro-fog pipe modules, and the adjacent micro-fog pipe modules are fixedly connected.

2. The desulfurization micro-fog dust removal device according to claim 1, characterized in that, The adjacent micro-fog pipe modules are fixedly connected through flanges, threads or clamps.

3. The desulfurization micro-fog dust removal device according to claim 1, characterized in that, The micro-fog pipe modules are provided with cooling water, and the water temperature of the cooling water ranges from 10 DEG C to 25 DEG C.

4. The desulfurization micro-fog dust removal device according to claim 1, characterized in that, The pipe diameter of the micro-fog pipe modules ranges from DN80 to DN200.

5. The desulfurization micro-fog dust removal device according to claim 1, characterized in that, The spray devices are arranged in two or more, and the included angle alpha between the adjacent spray devices ranges from 20 DEG to 90 DEG.

6. The desulfurization micro-fog dust removal device according to claim 1, characterized in that, The flow rate of the single spray device ranges from 100 L / h to 1000 L / h.

7. The desulfurization micro-fog dust removal device according to claim 1, characterized in that, The atomized particle size of the spray device ranges from 10 to 100 mu m.

8. The desulfurization micro-fog dust removal device according to claim 1, characterized in that, The micro-fog deduster is installed on the original support of a roof-type mist eliminator and located at the inlet of the roof-type mist eliminator; and the micro-fog pipe modules and the support of the roof-type mist eliminator are fixedly connected through welding, bolt connection or buckle connection.

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