Ash conveying and dust removing energy-saving device for biomass power plant
By combining the chamber structure and optimizing the electrostatic precipitator design, including the electrode chamber, filter bag chamber, multiple sets of ionization fields and cathode corona electrodes, the problem of poor ash removal effect in the boiler ash removal system of biomass power plants has been solved, improving dust removal efficiency and reducing energy consumption.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-02
- Publication Date
- 2026-03-13
AI Technical Summary
In existing biomass power plant boiler ash removal systems, electrostatic precipitators have poor ash removal efficiency, which can easily lead to back corona discharge, affecting dust removal efficiency and increasing energy consumption.
The dust removal device adopts a combined chamber structure, including an electrode chamber and a filter bag chamber. It is equipped with multiple sets of ionization fields and cathode corona electrodes, and uses cathode corona electrodes with barbed wire and spiral wire structures. Combined with a heating layer and a flow equalization plate, it optimizes airflow distribution and dust handling.
It improves dust removal efficiency, reduces the impact of smoke and dust on subsequent processing, lowers maintenance costs and energy consumption, and achieves economical and energy-saving dust removal results.
Smart Images
Figure CN223988589U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of power plant ash removal technology, specifically relating to an energy-saving device for ash conveying and dust removal in biomass power plants. Background Technology
[0002] The ash removal system of a biomass power plant boiler undoubtedly holds a very important position. Electrostatic precipitators (ESPs) play a crucial role in this system, boasting high dust removal efficiency, the ability to handle high-temperature flue gas, low equipment resistance, and low maintenance costs, making them highly popular among users. Currently, ESPs are widely used as a primary dust removal device in industries such as power, steel, building materials, and chemicals.
[0003] In this process, the high-temperature flue gas generated by the combustion of biomass power plants is evenly distributed and guided into an electrostatic precipitator (ESP). The ESP cleans the dust, which is then captured, vibrated, and falls into the ash hopper at the bottom of the ESP. However, existing technologies suffer from poor cleaning performance due to variations in the ESP's structural design, resulting in exhaust dust that affects subsequent processing. Furthermore, ESPs are prone to back corona discharge. Although they can operate continuously, back corona discharge consumes power and severely impacts the ESP's performance, leading to a decrease in dust removal efficiency.
[0004] In view of the above factors, an energy-saving device for ash conveying and dust removal in biomass power plants is provided. By changing the first, second, or third electric fields with a large ash removal capacity, the ash removal efficiency of the electrostatic precipitator can be improved, maintenance costs and purchase funds can be saved, and it is more economical and energy-saving. Utility Model Content
[0005] The purpose of this invention is to provide an energy-saving device for ash conveying and dust removal in biomass power plants, so as to solve the problems mentioned in the background art.
[0006] The purpose of this utility model is achieved through the following technical solution: an energy-saving device for ash conveying and dust removal in a biomass power plant, comprising a dust removal device and a conveying mechanism connected to the dust removal device, wherein the dust removal device is configured as a combined silo structure, the dust removal device includes an electrode silo and a filter bag silo connected in series with the electrode silo, and a fixing frame is fixedly provided between the electrode silo and the filter bag silo.
[0007] The conveying mechanism includes a gas source station and a dust discharge pipeline connected to the gas source station;
[0008] Both the inlet and outlet ends of the dust removal device are fixedly equipped with flow equalization plates.
[0009] The bottom of the dust removal device is equipped with a buffer chamber, which is connected to the ash discharge pipeline via a connecting pipe. The end of the ash discharge pipeline is connected to a collection chamber.
[0010] Furthermore, the flow equalization plate at the inlet end of the dust removal device includes a first flow equalization plate and a second flow equalization plate. The first flow equalization plate and the second flow equalization plate are provided with through holes, and the first flow equalization plate and the second flow equalization plate are arranged at different angles at the inlet end.
[0011] The outlet end of the dust removal device is fixedly equipped with a third flow equalization plate, which is set at an angle.
[0012] Furthermore, the electrode chamber includes four sets of ionization fields, namely a first ionization field, a second ionization field, a third ionization field, and a fourth ionization field, and an anode integrated electrode and a cathode corona electrode are respectively disposed on the four sets of ionization fields;
[0013] The first ionization field, the second ionization field, the third ionization field, and the fourth ionization field are arranged at intervals, and each of the first ionization field, the second ionization field, the third ionization field, and the fourth ionization field is provided with an integrated anode electrode and a cathode corona electrode;
[0014] The anode integrated electrodes are symmetrically spaced, and the cathode corona electrodes are spaced between the anode integrated electrodes.
[0015] The integrated anode electrode and the cathode corona electrode are fixed at the upper and lower ends of the inner wall of the dust removal device.
[0016] Furthermore, the cathode corona electrodes in the first and second ionization fields are configured with barbed wire structures, and the barbed wires include tubular barbed wires or strip-shaped barbed wires.
[0017] Furthermore, the barbed line adopts a split four-barb structure, and the four-barb structure is fixed perpendicular to the tubular or strip-shaped fixing rod.
[0018] Furthermore, the cathode corona electrodes in the third and fourth ionization fields are spiral electrodes.
[0019] Furthermore, the bottom of the electrode compartment has a conical structure, and a heating layer is provided on the conical structure at the bottom of the electrode compartment. The heating layer is a jacketed insulation layer or a spiral tube heat-conducting layer.
[0020] The height of the heating layer occupies one-half or two-thirds of the height of the conical structure.
[0021] Furthermore, the dust removal device has trapezoidal structures on both sides, the filter bag compartment is arranged longitudinally, and a buffer compartment opposite to the filter bag compartment is arranged below the dust removal device. The buffer compartment is connected to the ash discharge pipeline through a connecting pipe, and the end of the ash discharge pipeline is connected to the collection compartment.
[0022] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0023] In order to facilitate the uniform distribution of airflow during use, the present invention provides a flow equalization plate at the inlet end of the dust removal device, which includes a first flow equalization plate and a second flow equalization plate. The first and second flow equalization plates are provided with through holes, and the first and second flow equalization plates are set at different angles at the inlet end. The above arrangement promotes a more uniform flow into the dust removal device.
[0024] The dust removal device used in this invention has a combined silo structure, which provides good dust removal effect and the discharged smoke and dust will improve the processing capacity of subsequent processing processes.
[0025] In order to improve the dust removal efficiency of the electrostatic precipitator, save money, and make it more economical and energy-saving during use, the present invention provides a cathode corona electrode with barbed wire structure in the first ionization field and the second ionization field. The barbed wire includes tubular barbed wire or strip barbed wire. The barbed wire adopts a split four-barbed structure and is fixed perpendicular to the tubular or strip fixed rod.
[0026] The inner wall of the conical structure of this utility model is provided with a blowpipe. The blowpipe sprays air onto the inner wall of the conical structure. The blowpipe extends to the outside of the conical structure and connects to the air pump of the air source station. The blowpipe is evenly distributed along the inner wall of the conical structure. The above-mentioned structural arrangement ensures that dust particles do not stick to the inner wall of the conical structure and cause corrosion. The above-mentioned structural arrangement also prevents water vapor and dust from condensing, making it less prone to dust accumulation and blockage. Attached Figure Description
[0027] Figure 1 This is a three-dimensional schematic diagram of the present invention;
[0028] Figure 2 This is a partially enlarged schematic diagram of the present invention;
[0029] Figure 3 This is a schematic cross-sectional view of the integrated anode electrode and the cathode corona electrode of this utility model;
[0030] Figure 4 This is a schematic diagram of the four-pronged thorn structure of this utility model;
[0031] Figure 5 This is a schematic diagram of the spiral corona electrode of this utility model;
[0032] Figure 6 This is a schematic diagram of the buffer chamber of this utility model. Detailed Implementation
[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.
[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0035] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0036] like Figure 1-6 As shown, an energy-saving device for ash conveying and dust removal in a biomass power plant includes a dust removal device 1 and a conveying mechanism 2 connected to the dust removal device 1. The dust removal device 1 is a combined silo structure, including an electrode silo 11 and a filter bag silo 12 connected in series with the electrode silo 11. A fixing frame is fixedly provided between the electrode silo 11 and the filter bag silo 12.
[0037] The conveying mechanism 2 includes an air source station 21 and a dust discharge pipeline 22 connected to the air source station 21;
[0038] Both the inlet end 13 and the outlet end 14 of the dust removal device 1 are fixedly equipped with flow equalization plates 15;
[0039] The bottom of the dust removal device 1 is provided with a buffer chamber 16. The buffer chamber 16 is connected to the ash discharge pipeline 22 through a connecting pipe. The end of the ash discharge pipeline 22 is connected to a collection chamber. There are 4 or 8 buffer chambers 16, and the buffer chambers 16 are arranged side by side at the bottom of the dust removal device 1.
[0040] The bottom of the buffer chamber 16 is equipped with an ash discharge valve.
[0041] The above-mentioned air source station 21 uses a compressed air pump to blow the dust from the dust conveying pipeline to the collection bin for treatment.
[0042] The electrode chamber 11 and the filter bag chamber 12 are connected in series, wherein the filter bag chamber 12 contains several bag dust collection structures.
[0043] The electrode chamber 11 of the dust removal device 1 is also equipped with a rapping device disclosed in the prior art (not shown in the figure). The rapping transmission device is mainly divided into top type and side type. The top mechanical rapping is driven by a motor, which drives the flexible arm hammer to strike the top anvil through a reducer or uses a cam and a lever shaft to lift the impact rod to achieve rapping. The side rapping is powered by a motor, which drives the shaft and rapping hammer through a reducer to achieve rapping.
[0044] The dust removal device 1 is also equipped with a back-blowing device disclosed in the prior art on the filter bag bin 12. A fan or air pump is connected to the back-blowing pipe at the outlet end of the filter bag bin 12 to clean the dust by blowing air in the opposite direction (not shown in the figure).
[0045] The dust removal device 1 is a combined chamber structure, including an electrode chamber 11 and a filter bag chamber 12 connected in series with the electrode chamber 11. When the filter bag chamber is backflushed, the dust is directly blown into the electrode chamber and falls down. Since the filter bag chamber 12 is located at the rear end of the first ionization field 111, the second ionization field 112, the third ionization field 113, and the fourth ionization field 114, the amount of dust processed in the four electric fields is less than that in each field. The flue gas passing through the filter bag chamber is actually a re-filtered form with even less dust.
[0046] In order to facilitate the uniform distribution of airflow during use, the flow equalization plate at the inlet end 13 of the dust removal device 1 includes a first flow equalization plate 131 and a second flow equalization plate 132. The first flow equalization plate 131 and the second flow equalization plate 132 are provided with through holes, and the first flow equalization plate 131 and the second flow equalization plate 132 are set at different angles at the inlet end 13.
[0047] The outlet end of the dust removal device 1 is fixedly equipped with a third flow equalization plate 133, which is set at an inclination.
[0048] In order to facilitate more effective treatment of flue gas through the electrode chamber 11 during use, the electrode chamber 11 includes four sets of ionization fields, namely the first ionization field 111, the second ionization field 112, the third ionization field 113, and the fourth ionization field 114. The four sets of ionization fields are respectively provided with an anode integrated electrode 3 and a cathode corona electrode 4.
[0049] The first ionization field 111, the second ionization field 112, the third ionization field 113, and the fourth ionization field 114 are arranged at intervals and in communication, and an anode integrated electrode 3 and a cathode corona electrode 4 are provided in each of the first ionization field 111, the second ionization field 112, the third ionization field 113, and the fourth ionization field 114.
[0050] The anode integrated electrodes 3 are symmetrically arranged at intervals, and the cathode corona electrodes 4 are arranged at intervals between the anode integrated electrodes 3;
[0051] The anode integrated electrode 3 and the cathode corona electrode 4 are fixed at the upper and lower ends of the inner wall of the dust removal device 1.
[0052] The upper and lower ends of the anode integrated electrode 3 are fixed to the steel structure frame beam for support and fixation.
[0053] In order to improve the ash removal efficiency of the electrostatic precipitator during use, save money, and make it more economical and energy-efficient, the cathode corona electrode 4 set in the first ionization field 111 and the second ionization field 112 is set with a barbed wire structure, which includes tubular barbed wire or strip barbed wire.
[0054] The barbed line adopts a split four-barb structure, and the four-barb structure is fixed perpendicular to the tubular or strip-shaped fixing rod.
[0055] The cathode corona electrode 4 in the third ionization field 113 and the fourth ionization field 114 is a spiral electrode.
[0056] Alternatively, the cathode corona electrode 4 set in the first ionization field 111, the second ionization field 112, and the third ionization field 113 may be a barbed wire structure, and the cathode corona electrode 4 in the fourth ionization field 114 may be a spiral wire electrode.
[0057] In order to facilitate continuous heating of the conical structure through the heating layer during use and avoid corrosion of the conical structure during long-term use, the bottom of the electrode compartment 11 is a conical structure, and a heating layer 5 is provided on the bottom conical structure of the electrode compartment 11. The heating layer 5 is a jacketed insulation layer or a spiral tube heat-conducting layer.
[0058] The inner wall of the conical structure is provided with a blowpipe, which sprays air onto the inner wall of the conical structure. The blowpipe extends to the outside of the conical structure and connects to the air pump of the air source station 21. The blowpipe is evenly distributed along the inner wall of the conical structure. The above-mentioned structural arrangement ensures that dust particles do not stick to the inner wall of the conical structure and cause corrosion. The above-mentioned structural arrangement prevents water vapor and dust from condensing, making it less prone to dust accumulation and blockage.
[0059] The height of the heating layer 5 occupies one-half or two-thirds of the height of the conical structure.
[0060] When the insulation layer is jacketed, an inlet and an outlet (not shown in the figure) are provided on the heating layer for the flow of water or hot steam.
[0061] When the heating layer is a spiral heat-conducting layer, the inlet and outlet ends of the spiral tube (not shown in the figure) are provided on the heating layer for the flow of water or hot steam.
[0062] The electrode chamber 11 and the filter bag chamber 12 in the dust removal device 1 are connected in series. The two sides of the dust removal device 1 are arranged in a trapezoidal structure, and the filter bag chamber 12 is placed horizontally.
[0063] Alternatively, the dust removal device 1 may be configured in another form, with trapezoidal structures on both sides. The filter bag chamber 12 is arranged longitudinally, and a buffer chamber opposite to the filter bag chamber 12 is arranged below the dust removal device 1. The buffer chamber is connected to the ash discharge pipeline through a connecting pipe, and the end of the ash discharge pipeline is connected to the collection chamber.
[0064] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0065] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. An energy-saving device for ash conveying and dust removal in a biomass power plant, characterized in that: The dust removal device is provided in a combined bin structure, and comprises an electrode bin and a filter bag bin connected in series with the electrode bin. The conveying mechanism comprises a gas source station and a dust guide output pipeline connected with the gas source station. The inlet end and the outlet end of the dust removal device are fixedly provided with flow uniformizing plates. The bottom of the dust removal device is provided with a buffer bin connected with the dust guide output pipeline through a connecting pipe.
2. The biomass power plant ash conveying and dust removing energy saving device according to claim 1, characterized in that: The flow uniformizing plate at the inlet end of the dust removal device comprises a first flow uniformizing plate and a second flow uniformizing plate, through holes are formed in the first flow uniformizing plate and the second flow uniformizing plate, and the first flow uniformizing plate and the second flow uniformizing plate are provided at different angles in an inclined manner at the inlet end. The outlet end of the dust removal device is fixedly provided with a third flow uniformizing plate provided in an inclined manner.
3. The biomass power plant ash conveying and dust removing energy saving device according to claim 2, characterized in that: The electrode bin comprises four groups of ionization fields, namely a first ionization field, a second ionization field, a third ionization field and a fourth ionization field, and the four groups of ionization fields are respectively provided with anode integrated electrodes and cathode corona electrodes. The first ionization field, the second ionization field, the third ionization field and the fourth ionization field are provided in a spaced manner, and the first ionization field, the second ionization field, the third ionization field and the fourth ionization field are respectively provided with anode integrated electrodes and cathode corona electrodes.
4. The biomass power plant ash conveying and dust removing energy saving device according to claim 3, characterized in that: The anode integrated electrodes are provided in a spaced and symmetrical manner, and the cathode corona electrodes are provided in a spaced manner between the anode integrated electrodes. The anode integrated electrodes and the cathode corona electrodes are fixed to the upper and lower ends of the inner wall of the dust removal device.
5. The biomass power plant ash conveying and dust removing energy saving device according to claim 4, characterized in that: The cathode corona electrodes provided in the first ionization field and the second ionization field are provided in a thorn line structure, and the thorn line comprises a tubular thorn line or a strip-shaped thorn line.
6. The biomass power plant ash conveying and dust removing energy saving device according to claim 5, characterized in that: The thorn line is provided in a split four-thorn structure, and the four-thorn structure is fixed perpendicularly to a tubular or strip-shaped fixed rod.
7. The biomass power plant ash conveying and dust removing energy saving device according to claim 6, characterized in that: The cathode corona electrodes in the third ionization field and the fourth ionization field are spiral wire electrodes.
8. The biomass power plant ash conveying and dust removing energy saving device according to claim 7, characterized in that: The bottom of the electrode bin is provided in a conical body structure, and a heating layer is arranged on the bottom of the conical body structure, and the heating layer is a jacketed heat preservation layer or a spiral pipe heat conduction layer. The height of the heating layer occupies one half or two thirds of the height of the conical body structure.