Blockage removing device for medium-temperature separator of fluidized bed boiler
By designing a fluidized bed boiler medium-temperature separator blockage removal device and using an ash storage box and a pipe to vibrate the fly ash agglomerates, the blockage problem of the medium-temperature separator was solved, the fuel combustion efficiency and cleaning efficiency were improved, and environmental pollution was prevented.
Patent Information
- Application Number
- CN202422773204.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-14
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2034-11-14
AI Technical Summary
The medium-temperature separator of a fluidized bed boiler is easily clogged during the fly ash introduction process, causing abnormal operation of the separator and affecting the fuel combustion efficiency.
A fluidized bed boiler medium-temperature separator clearing device is designed, which includes an ash storage box, a plug pipe and a clearing hole. The plug pipe is inserted into the bottom end of the cyclone to vibrate the fly ash agglomerates, and the crushed fly ash agglomerates are discharged through the ash discharge pipe to prevent blockage and increase the amount of fly ash entering the furnace.
It effectively prevents separator blockage, improves fuel combustion efficiency, reduces cleaning workload, improves cleaning efficiency, and avoids environmental pollution.
Smart Images
Figure CN223331708U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of boiler equipment cleaning, in particular to a fluidized bed boiler medium-temperature separator clearing device. Background Art
[0002] The medium-temperature separator of a fluidized bed boiler (abbreviated as medium-temperature separator) is a boiler equipment used to recover and utilize fly ash in flue gas. The fly ash produced during the combustion of fuel is not fully burned. Collecting the incompletely burned ash and reintroducing it into the furnace for combustion can improve the combustion efficiency of the fuel.
[0003] The problem encountered is that during the process of introducing fly ash into the furnace, fine particles of fly ash will accumulate in the separation equipment and the long-term deposition of fly ash will form agglomerates, causing the separator to become blocked, resulting in abnormal operation of the separator. Utility Model Content
[0004] The present application proposes a fluidized bed boiler medium-temperature separator clearing device, which can be used to clear fly ash accumulated in the separator to prevent blockage of the medium-temperature separator, thereby improving the combustion efficiency of the fuel and improving the cleaning efficiency of the fly ash accumulated in the separator.
[0005] To achieve the above objectives, the present invention provides the following technical solutions:
[0006] A fluidized bed boiler medium-temperature separator blockage clearing device comprises an ash storage box, the upper end of the ash storage box is connected to the lower end of the medium-temperature separator cyclone, the upper end of the medium-temperature separator cyclone is connected to the flue, the bottom end of the ash storage box is connected to one end of a return box through a first connecting pipe, the other end of the return box is connected to the furnace through a second connecting pipe, the bottom end of the ash storage box is connected to an ash discharge pipe, a first valve is provided at the connection between the ash discharge pipe and the ash storage box, a side wall of the medium-temperature separator cyclone is connected to a plug pipe, one end of the plug pipe is connected to the medium-temperature separator cyclone, the other end of the plug pipe is provided with a blockage clearing hole, and a cap is provided on the top of the blockage clearing hole.
[0007] In one embodiment of the present application, a second valve is provided at the connection between the first connecting pipe and the ash storage box.
[0008] In one embodiment of the present application, a ventilation pipe is connected to the upper end of the return box.
[0009] In one embodiment of the present application, a first electrically controlled valve and a second electrically controlled valve are respectively provided at the connection points between the two sides of the return box and the first connecting pipe and the second connecting pipe.
[0010] In one embodiment of the present application, two inserting pipes are symmetrically provided on the side wall of the medium-temperature separator cyclone.
[0011] In one embodiment of the present application, two ash poking holes are provided on the upper end surface of the ash storage box.
[0012] In one embodiment of the present application, the bottom end of the ash discharge pipe is connected to an ash collecting box.
[0013] In summary, the technical solution proposed in this application includes the following beneficial technical effects: this application vibrates the fly ash lumps at the bottom of the cyclone by inserting a long stick such as a steel chisel into the cleaning port, and the crushed fly ash lumps fall into the bottom of the ash storage box. The bottom of the ash storage box is connected to an ash discharge pipe, and a first valve is provided at the connection between the ash discharge pipe and the ash storage box. The first valve is opened to discharge the crushed fly ash lumps through the ash discharge pipe, so as to realize the cleaning of the fly ash lumps deposited at the bottom of the medium-temperature separator cyclone, prevent the separator from being blocked, increase the amount of fly ash entering the furnace, thereby improving the combustion efficiency of the fuel, and significantly reduce the cleaning workload compared to dismantling the medium-temperature separator cyclone for cleaning, thereby improving the cleaning efficiency of the medium-temperature separator cyclone. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0015] Figure 1 A schematic diagram of the three-dimensional structure of a fluidized bed boiler medium-temperature separator clearing device provided in one embodiment of the present application;
[0016] Figure 2 A schematic diagram of the assembly structure of a return box of a fluidized bed boiler medium-temperature separator clearing device according to an embodiment of the present application;
[0017] Figure 3 A schematic diagram of the connection structure between the vent pipe and the return box of the fluidized bed boiler medium-temperature separator clearing device provided in one embodiment of the present application;
[0018] Figure 4 A schematic diagram of the three-dimensional structure of a fluidized bed boiler medium-temperature separator clearing device provided in one embodiment of the present application;
[0019] In the figure: ash storage box-1, ash discharge pipe-11, ash hole-13, first valve-111;
[0020] Medium-temperature separator cyclone-2, flue-21, intubation-22, clearing hole-221, cap-222;
[0021] Return box 3, first connecting pipe 31, second valve 311, first electrically controlled valve 312, second connecting pipe 32, second electrically controlled valve 321, vent pipe 33;
[0022] furnace-4;
[0023] Ash collection box - 5. DETAILED DESCRIPTION
[0024] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application are clearly and completely described below. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts also fall within the scope of protection of this application.
[0025] It should be noted that in the description of this application, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply 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 this application.
[0026] The terms "mounted," "connected," and "connected" in this application should be interpreted broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical connections; direct connections or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.
[0027] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.
[0028] This embodiment provides a fluidized bed boiler medium temperature separator clearing device, see Figures 1-4As shown, it includes an ash storage box 1, the upper end of the ash storage box 1 is connected to the lower end of the medium-temperature separator cyclone 2, the upper end of the medium-temperature separator cyclone 2 is connected to the flue 21, the bottom end of the ash storage box 1 is connected to one end of the return box 3 through a first connecting pipe 31, and the other end of the return box 3 is connected to the furnace 4 through a second connecting pipe 32, the bottom end of the ash storage box 1 is connected to an ash discharge pipe 11, and a first valve 111 is provided at the connection between the ash discharge pipe 11 and the ash storage box 1, the side wall of the medium-temperature separator cyclone 2 is connected to a plug 22, one end of the plug 22 is connected to the medium-temperature separator cyclone 2, and the other end of the plug 22 is provided with a clearing hole 221, and a cap 222 is provided on the clearing hole 221.
[0029] In the above embodiment, the upper end of the medium-temperature separator cyclone 2 is connected with the flue 21, and the flue gas enters the medium-temperature separator cyclone 2 through the flue 21 for gas-solid separation, and the fly ash in the flue gas falls into the bottom end of the medium-temperature separator cyclone 2. The upper end of the ash storage box 1 is connected with the lower end of the medium-temperature separator cyclone 2, and then the fly ash falls into the ash storage box 1. The bottom end of the ash storage box 1 is connected to one end of the return box 3 through the first connecting pipe 31, and the other end of the return box 3 is connected to the furnace 4 through the second connecting pipe 32. That is, after the fly ash enters the ash storage box 1, it enters the return box 3 through the first connecting pipe 31, and then enters the furnace 4 through the second connecting pipe 32 to burn the fly ash again. In the process of the medium-temperature separator cyclone 2 descending, the fly ash is easily accumulated at the bottom end of the medium-temperature separator cyclone 2 to form agglomerates and blockages. The side wall of the medium-temperature separator cyclone 2 is connected with a plug 2 2, and one end of the insert pipe 22 is connected to the medium-temperature separator cyclone 2, and the other end of the insert pipe 22 is provided with a clearing hole 221. When cleaning fly ash lumps, a long stick such as a steel chisel can be inserted from the clearing hole to vibrate the fly ash lumps at the bottom of the cyclone, and the crushed fly ash lumps fall into the bottom of the ash storage box 1. The bottom end of the ash storage box 1 is connected to an ash discharge pipe 11, and a first valve 111 is provided at the connection between the ash discharge pipe 11 and the ash storage box 1. The first valve 111 is opened to discharge the crushed fly ash lumps through the ash discharge pipe 11, so as to realize the cleaning of the fly ash lumps deposited at the bottom end of the medium-temperature separator cyclone 2, prevent the separator from being blocked, increase the amount of fly ash introduced into the furnace 4, so as to improve the combustion efficiency of the fuel, and significantly reduce the cleaning workload compared with dismantling the medium-temperature separator cyclone 2 for cleaning, thereby improving the cleaning efficiency of the medium-temperature separator cyclone 2. Furthermore, a cap 222 is provided on the clearing hole 221 of the insert pipe 22. After the cleaning of the medium-temperature separator cyclone 2 is completed, the clearing hole 221 is sealed with the cap 222 to prevent fly ash from being ejected through the clearing port and causing environmental pollution when the medium-temperature separator is running.
[0030] In one embodiment of the present application, see Figure 1 As shown, a second valve 311 is provided at the connection between the first connecting pipe 31 and the ash storage box 1 .
[0031] In the above embodiment, the second valve 311 is closed during the process of cleaning the fly ash agglomerates in the medium-temperature separator cyclone 2 to prevent the agglomerated debris from entering the ash storage box 1 and then entering the return box 3 through the first connecting pipe 31, causing the return box 3 to be blocked. In addition, when cleaning the cyclone, the second valve 311 is closed to disconnect the furnace 4 and the ash storage box 1. The cyclone can be cleaned without closing the furnace 4, preventing the backflow of furnace gas in the furnace 4, which is beneficial to improving the safety when cleaning fly ash agglomerates.
[0032] In one embodiment of the present application, see Figure 2 As shown, the upper end of the return box 3 is connected to a ventilation pipe 33.
[0033] In the above embodiment, the ventilation pipe 33 is used to blow gas into the return box 3 to blow the fly ash in the return box 3 into the furnace 4 through the second connecting pipe 32. On the one hand, blowing the fly ash into the furnace 4 by gas can increase the inflow rate of the fly ash to prevent congestion of the fly ash. On the other hand, blowing the fly ash into the furnace 4 can make the fly ash more dispersed, which is beneficial to the secondary full combustion of the fly ash and beneficial to improving the utilization efficiency of the fuel.
[0034] In one embodiment of the present application, see Figure 2 As shown, a first electrically controlled valve 312 and a second electrically controlled valve 321 are respectively provided at the connection points between the first connecting pipe 31 and the second connecting pipe 32 on both sides of the return box 3 .
[0035] In the above embodiment, in the initial state, the second electrically controlled valve 321 is in a closed state, preventing the furnace gas in the furnace 4 from entering the return box 3 through the second connecting pipe 32, causing the temperature in the return box 3 to be too high, causing the fly ash to pre-react in the return box 3, thereby reducing the combustion calorific value of the fly ash in the furnace 4. When the fly ash enters the return box 3, the first electrically controlled valve 312 is in an open state. After a certain amount of fly ash enters the return box 3, the first electrically controlled valve 312 is closed and the second electrically controlled valve 321 is opened. Then, pressurized gas is introduced into the return box 3 through the vent pipe 33 to blow the fly ash in the return box 3 into the furnace 4 for re-combustion. The closure of the first electrically controlled valve 312 can prevent the pressurized gas from blowing the fly ash back to the ash storage box 1 through the first connecting pipe 31, thereby causing fly ash blockage, which is beneficial to improving the smoothness of the flow of fly ash into the furnace 4.
[0036] In one embodiment of the present application, see Figure 2 As shown, two inserting pipes 22 are symmetrically provided on the side wall of the medium-temperature separator cyclone 2 .
[0037] In the above embodiment, two inserting pipes 22 are symmetrically provided on the side wall of the cyclone, which can increase the range of scraping and cleaning of fly ash attached to the inner wall of the cyclone after the inserting rod is inserted, thereby improving the cleaning efficiency.
[0038] In one embodiment of the present application, see Figure 2 As shown, two ash poking holes 13 are provided at the upper end of the ash storage box 1.
[0039] In the above embodiment, the ash poking hole 13 at the upper end of the ash storage box 1 can be used to insert a stick to break up large fly ash clumps in the ash storage box 1, thereby facilitating the discharge of the fly ash clumps in the ash storage box 1 from the ash discharge pipe 11. Optionally, a cover plate is provided at the ash poking hole 13, which can be closed to keep the ash storage box 1 closed when the cleaning work is completed.
[0040] In one embodiment of the present application, see Figure 3 As shown, the bottom end of the ash discharge pipe 11 is connected to the ash collecting box 5.
[0041] In the above embodiment, the fly ash agglomerates can be collected into the ash collecting box 5 through the ash discharge pipe 11, so as to facilitate unified treatment at a later stage.
[0042] During the actual use of this application: open the cap 222 at the clearing hole 221, insert a long stick such as a steel chisel into the clearing port to vibrate the fly ash lumps at the bottom of the cyclone or crush and scrape off the fly ash lumps attached to the inner wall of the cyclone, and the crushed fly ash lumps fall into the bottom of the ash storage box 1. The bottom end of the ash storage box 1 is connected to an ash discharge pipe 11, and a first valve 111 is provided at the connection between the ash discharge pipe 11 and the ash storage box 1. Open the first valve 111 to discharge the crushed fly ash lumps through the ash discharge pipe 11, so as to realize the cleaning of the fly ash lumps deposited at the bottom end of the medium-temperature separator cyclone 2.
[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A fluidized bed boiler medium temperature separator clearing device, characterized in that: The invention comprises an ash storage box (1), the upper end of the ash storage box (1) is connected to the lower end of the medium-temperature separator cyclone (2), the upper end of the medium-temperature separator cyclone (2) is connected to the flue (21), the bottom end of the ash storage box (1) is connected to one end of the return box (3) through a first connecting pipe (31), the other end of the return box (3) is connected to the furnace (4) through a second connecting pipe (32), and the bottom end of the ash storage box (1) is connected to An ash discharge pipe (11) is provided with a first valve (111) at the connection between the ash discharge pipe (11) and the ash storage box (1); a plug (22) is connected to the side wall of the medium-temperature separator cyclone (2); one end of the plug (22) is communicated with the medium-temperature separator cyclone (2); the other end of the plug (22) is provided with a clearing hole (221); and a cap (222) is provided on the upper part of the clearing hole (221).
2. The fluidized bed boiler medium temperature separator clearing device according to claim 1, characterized in that: A second valve (311) is provided at the connection between the first connecting pipe (31) and the ash storage box (1).
3. The fluidized bed boiler medium temperature separator clearing device according to claim 1, characterized in that: The upper end of the return box (3) is connected to a vent pipe (33).
4. The fluidized bed boiler medium temperature separator clearing device according to claim 3, characterized in that: A first electrically controlled valve (312) and a second electrically controlled valve (321) are respectively provided at the connection points between the first connecting pipe (31) and the second connecting pipe (32) on both sides of the return box (3).
5. The fluidized bed boiler medium temperature separator clearing device according to claim 1, characterized in that: Two insert pipes (22) are symmetrically arranged on the side wall of the medium-temperature separator cyclone (2).
6. The fluidized bed boiler medium temperature separator clearing device according to claim 1, characterized in that: The upper end surface of the ash storage box (1) is provided with two ash poking holes (13).
7. The fluidized bed boiler medium temperature separator clearing device according to any one of claims 1 to 6, characterized in that: The bottom end of the ash discharge pipe (11) is connected to an ash collecting box (5).