Dust removal device of boiler slag removal equipment

Abstract

The utility model discloses a dust removal device of boiler slag removal equipment, which comprises a slag cooler set, a plurality of slag coolers, a plurality of dust removal devices, a plurality of dust removal devices, a plurality of dust removal devices, a dust removal device and a dust removal device, and is characterized in that the slag cooler set is provided with a plurality of slag coolers; the outlet of each slag cooler is communicated to the inlet of the tail part of the boiler flue, and the pressure of the tail part of the boiler flue is negative pressure; an inlet of the cloth bag dust removal device is communicated with the tail part of the boiler flue, and an outlet of the cloth bag dust removal device is communicated to a chimney and is used for discharging flue gas. According to the technical scheme provided by the embodiment of the invention, the slag cooler unit is communicated to the tail part of the boiler flue, and the tail part of the boiler flue is in the negative pressure state, so that the negative pressure state is formed at the outlet of the slag cooler, and dust enters the boiler flue in the negative pressure state and then enters the bag-type dust removal device for dust removal treatment; the device is simple in structure and relatively good in use effect, and has a good dust removal effect.

Description

Technical Field

[0001] The utility model generally relates to the field of thermal power generation slag removal systems, in particular to a dust removal device for boiler slag removal equipment. Background Art

[0002] The circulating fluidized bed is fluidized when the gas velocity is greater than the free settling velocity of the particles. The particles are carried out by the gas flow, and after the gas and solid are separated, the solid is circulated back to the fluidized bed formed in the bed. The above-mentioned circulating fluidized bed is generally applied in the current thermal power generation field, and the boiler deslagging system is required for deslagging treatment.

[0003] The circulating fluidized bed boiler slag removal system used in thermal power now uses dry slag removal, so that the ash and slag can be comprehensively utilized. A rotary slag cooler is used. The hot slag produced by the boiler is cooled to below 150°C by the slag cooler and enters the slag storage bin through the conveyor. A large amount of dust will be generated in the space from the outlet of the slag cooler to the conveyor. In order to eliminate the generated dust, the general system designs a dump chute on the slag conveying equipment, installs a bag dust collector on it, and is equipped with a dust removal fan and a compressed air injection valve on the dust collector. However, the system is complex and the investment is high. In addition, due to the poor sealing of the dump chute, the dust removal effect is not good. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a dust removal device for boiler slag removal equipment.

[0005] In a first aspect, a dust removal device for boiler slag removal equipment is provided, comprising:

[0006] A slag cooling unit, wherein the slag cooling unit is provided with a plurality of slag coolers, each of which is provided with an outlet;

[0007] A boiler flue, wherein the outlet of each slag cooler is connected to the inlet of the tail of the boiler flue, and the pressure of the tail of the boiler flue is negative pressure;

[0008] A bag dust removal device, wherein the inlet of the bag dust removal device is connected to the tail end of the boiler flue, and the outlet is connected to the chimney for flue gas discharge.

[0009] As a feasible manner, the outlet is opened at the top of each slag cooler.

[0010] As an achievable manner, each of the outlets is connected to a first channel, the tail of the boiler flue is connected to a second channel, a plurality of the first channels are connected to the second channel, and the diameter of the second channel is greater than the diameter of the first channel.

[0011] As an achievable manner, a control valve is provided on the first channel at the top of each slag cooler.

[0012] As a feasible manner, a regulating valve is provided on the second channel at the tail entrance of the boiler flue.

[0013] As a feasible approach, the tail pressure of the boiler flue is specifically -2000--4000PA.

[0014] As a feasible approach, an induced draft fan is further provided between the bag dust removal device and the chimney.

[0015] As an achievable manner, it further includes a control device, which is electrically connected to the regulating valve and is used to open the regulating valve when the boiler is performing slag removal, and to adjust the regulating valve according to the size of dust in the slag cooler;

[0016] The control device is electrically connected to the control valve, and is used to open the control valve after the regulating valve is opened.

[0017] According to the technical solution provided in the embodiment of the present application, by connecting the slag cooling unit to the tail end of the boiler flue, since the tail end of the boiler flue is in a negative pressure state, a negative pressure state is formed at the outlet of the slag cooler, and dust enters the boiler flue under the negative pressure state, and then enters the bag dust removal device for dust removal, thereby generating qualified flue gas for external discharge. The device has a simple structure and good use effect, and has a good dust removal effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0019] Figure 1 It is the principle diagram of the dust removal device of the boiler slag removal equipment in this embodiment.

[0020] Reference numerals:

[0021] 1-slag cooler; 2-control valve; 3-first channel;

[0022] 4-second channel; 5-regulating valve; 6-boiler flue;

[0023] 7-Bag dust removal device; 8-Draft fan; 9-Chimney. DETAILED DESCRIPTION

[0024] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It is also necessary to explain that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings.

[0025] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] Please refer to Figure 1 This embodiment provides a dust removal device for boiler slag removal equipment, including:

[0027] A slag cooling unit, wherein the slag cooling unit is provided with a plurality of slag coolers 1, each of the slag coolers 1 is provided with an outlet, and each of the outlets is connected with a first channel 3;

[0028] The boiler flue 6, the outlet on each of the slag coolers 1 is connected to the inlet at the tail of the boiler flue 6, and the pressure at the tail of the boiler flue 6 is negative pressure;

[0029] A bag dust removal device 7, wherein the inlet of the bag dust removal device 7 is connected to the tail end of the boiler flue 6, and the outlet is connected to the chimney 9 for flue gas discharge.

[0030] The dust removal device provided in this embodiment connects the slag cooling unit to the tail end of the boiler flue 6. Since the tail end of the boiler flue 6 is in a negative pressure state, a negative pressure state is formed at the outlet of the slag cooler 1. Dust enters the boiler flue 6 under the negative pressure state, and then enters the bag dust removal device 7 for dust removal, thereby generating qualified flue gas for external discharge. The device has a simple structure and good use effect, and has a good dust removal effect.

[0031] The dust removal device comprises a set of slag coolers 1, Figure 1 The slag cooling unit includes four slag cooling machines 1, each of which has an ash outlet, which is connected to the boiler flue 6 through a pipeline, preferably connected to the tail of the boiler flue 6. Since the tail of the boiler flue 6 is in a negative pressure state, the slag in the slag cooling machine can be adsorbed, and there will be no slag leakage. The slag then enters the subsequent bag dust removal device 7 through the boiler flue 6 for dust removal, and the treated flue gas is discharged. The processing steps and processing devices are simple and the processing effect is good. In this embodiment, the bag dust removal device 7 is used as the slag dust removal equipment, which can capture fine and dry dust, retain the dust in the slag, purify the gas, and is arranged at the tail of the boiler flue 6, and adopts a simple structure to achieve a good dust removal effect.

[0032] Optionally, the outlet is opened at the top of each of the slag coolers 1. The slag cooler 1 in this embodiment is provided with an opening for setting up a pipeline. Since the dust removal device in this embodiment is generally used in the field of thermal power, the hot slag generated by the boiler is dusted. The hot slag is first cooled by the slag cooler 1. However, the hot slag after cooling generally has a temperature of about 150°C, so the dust will move upward with the hot air. By opening the top of the slag cooler 1, the dust and hot air will move upward through the opening at the top and enter the pipeline, so that the dust removal device provided in this embodiment can achieve a better dust removal effect with a lower cost.

[0033] Furthermore, each of the outlets is connected to a first channel 3 , the tail of the boiler flue 6 is connected to a second channel 4 , a plurality of the first channels 3 are connected to the second channel 4 , and the diameter of the second channel 4 is greater than that of the first channel 3 .

[0034] refer to Figure 1 As shown, in this embodiment, multiple slag coolers 1 are connected to the boiler flue 6 through pipelines. Preferably, a first channel 3 is set at the outlet of the top of the slag cooler 1, and the first channel 3 is connected to the inside of the slag cooler 1 to transfer the ash inside each slag cooler 1. The boiler flue 6 is connected to the second channel 4, and the second channel 4 is connected to the multiple first channels 3, so that the ash in the multiple first channels 3 is gathered and transferred to the inside of the boiler flue 6, and the ash and flue gas in the multiple first channels 3 are gathered in the first channel 3. In order to ensure the stability of the ash and flue gas flow in the second channel 4, it is preferred to set the diameter of the second channel 4 to be larger than the diameter of the first channel 3, so that the second channel 4 can accommodate the ash waste gas discharged from multiple slag coolers 1, and the effect of the entire dust removal device will not be affected due to the small inner diameter of the channel.

[0035] Furthermore, a control valve 2 is provided on the first channel 3 at the top of each slag cooler 1. The on-off of the first channel 3 on each slag cooler 1 is controlled by the control valve 2, and each slag cooler 1 corresponds to a control valve 2, which can realize the separate control of each slag cooler 1 and each first channel 3, making the use of the dust removal device more flexible, and can be applied to the cooling and dust removal of more ash, and the applicable volume is larger.

[0036] Furthermore, a control valve 2 is provided on the second channel 4 at the rear entrance of the boiler flue 6 .

[0037] In this embodiment, a control valve 2 is also provided on the second channel 4 connected to the boiler flue 6, and the ash and flue gas flow entering the boiler flue 6 and the bag dust removal device 7 is controlled by the control valve 2, so that the bag dust removal device 7 always maintains a good dust removal effect, and does not produce a poor dust removal effect due to excessive flue gas flow, so that the discharged flue gas meets the emission requirements. The opening of the control valve 2 on the second channel 4 is at least related to the flue gas flow in the second channel 4, and / or to the size of the dust in the slag cooler 1. When adjusting the opening of the control valve 2 first, it is determined according to the dust size in the slag cooler 1, and then the control valve 2 can be adjusted according to the dust removal effect and the dust flow.

[0038] Optionally, the tail pressure of the boiler flue 6 is specifically -2000--4000PA.

[0039] In this embodiment, a negative pressure needs to be provided through the boiler flue 6 to adsorb the ash in the slag cooler 1 into the boiler flue 6 and transfer it to the bag dust removal device 7 for dust removal. The negative pressure range is determined according to the actual device requirements.

[0040] Furthermore, an induced draft fan 8 is provided between the bag dust removal device 7 and the chimney 9 .

[0041] In this embodiment, a negative pressure is generated by an induced draft fan 8 disposed at the outlet of the bag dust collector 7 to suck the flue gas after the dust is adsorbed by the bag dust collector 7 until it is discharged through the chimney 9.

[0042] Furthermore, it also includes a control device, which is electrically connected to the regulating valve 5 and is used to open the regulating valve 5 when the boiler is deslagging, and adjust the regulating valve 5 according to the size of dust in the slag cooler 1;

[0043] The control device is electrically connected to the control valve 2 and is used to open the control valve 2 after the regulating valve 5 is opened.

[0044] This embodiment provides a control device connected to each valve to realize the control of the opening and closing of each valve and the flow regulation, wherein the flow control of the regulating valve 5 is adjusted according to the dust size in the slag cooler 1, and the control valve 2 is opened and closed according to the working conditions of each slag cooler 1, so that each slag cooler 1 can work independently without affecting each other. In addition, the control device can be connected to the slag cooler unit and the bag dust removal device 7 for control, and further control the opening and closing of the device in each step to realize the automatic control of the dust removal device.

[0045] When the dust removal device of the filtering and slag removal equipment in the above embodiment is in use, when the fluidized bed boiler is in operation, the negative pressure in the flue at the tail of the boiler is within the set range. When the boiler needs to discharge slag, the regulating valve 5 is first controlled to be opened, and the regulating valve 5 is controlled to an appropriate position according to the size of the dust in the slag cooler 1. Then, the control valve 2 corresponding to the slag cooler 1 that needs to discharge slag is opened to achieve the connection between the first channel 3 and the second channel 4. A negative pressure is generated in the corresponding slag cooler 1. The corresponding slag cooler 1 is opened, and the ash and slag dust enters the tail of the boiler flue 6 through the first channel 3 and the second channel 4, and is dusted along with the flue gas through the bag dust removal device 7. The purified and qualified flue gas passes through the induced draft fan 8 to the chimney 9 and is discharged into the atmosphere.

[0046] This embodiment has a good dust removal effect by adopting the above-mentioned dust removal device, and has a simple structure, does not have adverse conditions such as air leakage, and saves costs.

[0047] It should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used above to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention; the orientation words "inside" and "outside" refer to the inside and outside relative to the contours of the components themselves. 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.

[0048] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways, rotated 90 degrees or in other orientations, and the spatially relative descriptions used herein are interpreted accordingly.

[0049] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the utility model. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) by each other to form a technical solution.

Claims

1. A dust removal device for boiler slag removal equipment, characterized in that: include: A slag cooling unit, wherein the slag cooling unit is provided with a plurality of slag coolers, each of which is provided with an outlet; A boiler flue, wherein the outlet of each slag cooler is connected to the inlet of the tail of the boiler flue, and the pressure of the tail of the boiler flue is negative pressure; A bag dust removal device, wherein the inlet of the bag dust removal device is connected to the tail end of the boiler flue, and the outlet is connected to the chimney for flue gas discharge.

2. The dust removal device of the boiler slag removal equipment according to claim 1, characterized in that: The outlet is opened at the top of each slag cooler.

3. The dust removal device of the boiler slag removal equipment according to claim 1, characterized in that: Each of the outlets is connected to a first channel, the tail of the boiler flue is connected to a second channel, a plurality of the first channels are connected to the second channel, and the diameter of the second channel is greater than the diameter of the first channel.

4. The dust removal device of the boiler slag removal equipment according to claim 3, characterized in that: A control valve is provided on the first channel at the top of each slag cooler.

5. The dust removal device of the boiler slag removal equipment according to claim 4, characterized in that: A regulating valve is provided on the second channel at the tail entrance of the boiler flue.

6. The dust removal device of the boiler slag removal equipment according to claim 1, characterized in that: The tail pressure of the boiler flue is specifically -2000--4000PA.

7. The dust removal device of the boiler slag removal equipment according to claim 1, characterized in that: An induced draft fan is also provided between the bag dust removal device and the chimney.

8. The dust removal device of the boiler slag removal equipment according to claim 5, characterized in that: It also includes a control device, which is electrically connected to the regulating valve and is used to open the regulating valve when the boiler is deslagging, and to adjust the regulating valve according to the size of dust in the slag cooler; The control device is electrically connected to the control valve, and is used to open the control valve after the regulating valve is opened.

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