Equipment for optimizing efficiency of circulating fluidized bed boiler

Abstract

The utility model discloses equipment for optimizing the efficiency of a circulating fluidized bed boiler. The boiler comprises a boiler body, the top of the boiler body communicates with a smoke exhaust pipe, a water tower is arranged on the right side of the boiler body, heating mechanisms are fixedly connected to the front end and the back end of the inner wall of the water tower correspondingly, and each heating mechanism comprises a shell, a square pipe, a guide pipe, a water pump, a discharge pipe, a support, a booster fan and a cross pipe. The front end and the back end of the inner wall of the water tower are fixedly connected with shells, and the inner sides of the shells are fixedly connected with square pipes. Through the arrangement of the heating mechanism, steam can enter the smoke exhaust pipe, the smoke exhaust pipe is guided into the square pipe, the square pipe guides the steam to be circularly and downwards conveyed into the guiding pipe, the steam heats the square pipe for the residence time in the square pipe, the square pipe heats cold water in the water tower, the cold water is heated to be heated, and the temperature of the cold water is increased. And the working efficiency is improved by utilizing flue gas waste heat of the boiler body.

Description

Technical Field

[0001] This utility model relates to the field of boiler operating efficiency technology, specifically to a device for optimizing the efficiency of a circulating fluidized bed boiler. Background Technology

[0002] Alkali metals volatilize during combustion and then condense on the heating surface. When alkali metal compounds in vapor form encounter a lower-temperature heating surface, they condense and form sticky deposits together with other components in the ash, leading to slagging and fouling on the boiler heating surface. Slagging reduces the boiler's heat transfer efficiency because the slagging layer hinders the transfer of heat from the flue gas to the working fluid water or steam inside the heating surface. Severe slagging can also block the flue, affecting the boiler's normal ventilation. Fouling reduces the heat absorption capacity of the heating surface, leading to an increase in flue gas temperature and reducing the boiler's thermal efficiency.

[0003] A boiler is an energy conversion device, mainly used to convert the chemical energy in fuel into heat energy to produce steam or hot water. However, existing boilers emit significant flue gas pollution when burning high-alkali and high-chlorine coal, and this can easily cause blockages in pipes, reducing the boiler's operating efficiency.

[0004] Therefore, the boiler needs to be redesigned and modified to effectively prevent the boiler from emitting large amounts of flue gas pollution when burning high-alkali and high-chlorine coal, and to prevent the pipeline from being easily blocked. Utility Model Content

[0005] To address the problems mentioned in the background art, the purpose of this utility model is to provide a device for optimizing the efficiency of a circulating fluidized bed boiler, which has the advantage of high combustion efficiency and solves the problems of large flue gas pollution and easy blockage of pipelines when the boiler burns high-alkali and high-chlorine coal.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a device for optimizing the efficiency of a circulating fluidized bed boiler, comprising;

[0007] Boiler body;

[0008] The top of the boiler body is connected to a flue pipe, and a water tower is provided on the right side of the boiler body. Heating mechanisms are fixedly connected to the front and back ends of the inner wall of the water tower.

[0009] The heating mechanism includes a shell, a square tube, a guide pipe, a water pump, a discharge pipe, a support, a booster fan, and a cross tube. The shell is fixedly connected to both the front and back ends of the inner wall of the water tower. The square tube is fixedly connected to the inner side of the shell. The end of the exhaust pipe away from the boiler body passes through the interior of the water tower and connects to the front end of the square tube. The left side of the bottom of the square tube is interconnected by a pipe. The left side of the square tube is connected to the guide pipe. The left side of the guide pipe passes through the left side of the water tower. The water pump is fixedly installed at the bottom of the front end of the water tower. The back end of the water pump is connected to the front end of the water tower by a pipe. The top of the water pump is connected to the discharge pipe. The support is fixedly connected laterally to the top of the inner cavity of the water tower. The booster fan is fixedly connected to the inner side of the support. The output end of the booster fan is connected to the cross tube. The left and right sides of the cross tube are connected to the inner side of the square tube. The air inlet of the booster fan passes through the back end of the water tower. The end of the guide pipe away from the water tower is connected to a processing mechanism.

[0010] In a preferred embodiment of this invention, the processing mechanism includes a filter box, a grid mesh, and a conveying pipe. The end of the guide pipe away from the water tower is connected to the filter box. The front and back ends of the filter box are both horizontally fixedly connected to the grid mesh, and the front end of the filter box is connected to the conveying pipe.

[0011] As a preferred embodiment of this utility model, the bottom of the water pump is fixedly connected to a base, the bottom of the base is in contact with the ground, and the base is used in conjunction with the water pump.

[0012] As a preferred embodiment of this utility model, support feet are fixedly connected to the left and right sides of the bottom of the boiler body, the bottom of the support feet are in contact with the ground, and the support feet are used in conjunction with the boiler body.

[0013] As a preferred embodiment of this invention, the number of square tubes is several and they are evenly distributed, and the square tubes are used in conjunction with the water tower.

[0014] As a preferred embodiment of this invention, the output end of the booster fan is connected to a cross tube, which is used in conjunction with a square tube.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. This utility model, through the setting of the heating mechanism, enables steam to enter the interior of the flue pipe, which guides the steam to the interior of the square tube. The square tube guides the steam to circulate downwards and transport it to the interior of the guide pipe. The steam heats the square tube during its residence time inside the square tube, and the heating of the square tube feeds back to the cold water inside the water tower. The cold water is heated and its temperature rises, thus improving the working efficiency by utilizing the waste heat of the flue gas in the boiler body. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This utility model Figure 1 3D structural diagram of the water tower;

[0019] Figure 3 This utility model Figure 2 Three-dimensional diagram of a Chinese-type tube structure;

[0020] Figure 4 This utility model Figure 1 3D view of the middle filter box structure.

[0021] In the diagram: 1. Boiler body; 2. Exhaust pipe; 3. Water tower; 4. Heating mechanism; 41. Outer shell; 42. Square tube; 43. Guide pipe; 44. Water pump; 45. Discharge pipe; 46. Support; 47. Booster fan; 48. Cross tube; 5. Processing mechanism; 51. Filter box; 52. Grille; 53. Conveying pipe; 6. Base; 7. Support feet. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figures 1 to 4 As shown, the present invention provides a device for optimizing the efficiency of a circulating fluidized bed boiler, comprising:

[0024] Boiler body 1;

[0025] The top of the boiler body 1 is connected to the flue pipe 2, and a water tower 3 is set on the right side of the boiler body 1. The front end and back end of the inner wall of the water tower 3 are fixedly connected to the heating mechanism 4.

[0026] The heating mechanism 4 includes a shell 41, a square tube 42, a guide pipe 43, a water pump 44, a discharge pipe 45, a bracket 46, a booster fan 47, and a cross pipe 48. The shell 41 is fixedly connected to both the front and back ends of the inner wall of the water tower 3. The square tube 42 is fixedly connected to the inner side of the shell 41. The end of the flue pipe 2 away from the boiler body 1 passes through the interior of the water tower 3 and connects to the front end of the square tube 42. The left side of the bottom of the square tube 42 is interconnected by a pipe. The left side of the square tube 42 is connected to the guide pipe 43. The left side of the guide pipe 43 passes through the left side of the water tower 3. On the side, a water pump 44 is fixedly installed at the bottom of the front end of the water tower 3. The back end of the water pump 44 is connected to the front end of the water tower 3 through a pipe. The top of the water pump 44 is connected to a discharge pipe 45. A bracket 46 is fixedly connected horizontally to the top of the inner cavity of the water tower 3. A booster fan 47 is fixedly connected to the inside of the bracket 46. The output end of the booster fan 47 is connected to a cross tube 48. The left and right sides of the cross tube 48 are connected to the inside of the square tube 42. The air inlet of the booster fan 47 passes through the back end of the water tower 3. The end of the guide pipe 43 away from the water tower 3 is connected to a treatment mechanism 5.

[0027] refer to Figure 4 The processing unit 5 includes a filter box 51, a bar screen 52, and a conveying pipe 53. The end of the guide pipe 43 away from the water tower 3 is connected to the filter box 51. The front and back ends of the inner cavity of the filter box 51 are both horizontally fixedly connected to the bar screen 52. The front end of the filter box 51 is connected to the conveying pipe 53.

[0028] As a technical optimization of this utility model, by setting up the processing mechanism 5, the flue gas can enter the interior of the filter box 51 and filter particulate impurities with the help of the grid mesh 52. Finally, the flue gas is discharged to the outside through the conveying pipe 53 to achieve the effect of environmental protection.

[0029] refer to Figure 1 The bottom of the water pump 44 is fixedly connected to the base 6, the bottom of the base 6 is in contact with the ground, and the base 6 is used in conjunction with the water pump 44.

[0030] As a technical optimization of this utility model, the base 6 can assist the water pump 44 in working and also play a supporting and fixing role, thus preventing the water pump 44 from generating mechanical vibration during operation.

[0031] refer to Figure 1 Support legs 7 are fixedly connected to the left and right sides of the bottom of the boiler body 1. The bottom of the support legs 7 is in contact with the ground and the support legs 7 are used in conjunction with the boiler body 1.

[0032] As a technical optimization of this utility model, the setting of the support foot 7 can assist the boiler body 1 in working and at the same time play a supporting and fixing role, avoiding the phenomenon of the bottom of the boiler body 1 baking and cracking the ground during use.

[0033] refer to Figure 2 There are several square tubes 42, which are evenly distributed and used in conjunction with water tower 3.

[0034] As a technical optimization of this utility model, the square tube 42 can assist the water tower 3 in its operation and play a role in circulating heating, thus avoiding the inability of a single square tube 42 to heat the water tower 3 evenly.

[0035] refer to Figure 2 The output end of the booster fan 47 is connected to a cross tube 48, which is used in conjunction with the square tube 42.

[0036] As a technical optimization of this utility model, by setting up the booster fan 47, the cross tube 48 can boost the pressure of the square tube 42, avoiding the problem of the square tube 42 being too long and affecting the efficiency of flue gas passage.

[0037] The working principle and usage process of this utility model are as follows: During use, coal is burned inside the boiler body 1 to heat water. The flue gas generated by the coal is guided to the inside of the square tube 42 through the flue gas pipe 2. The square tube 42 guides the flue gas to circulate inside the water tower 3 and enters the inside of the filter box 51 through the guide pipe 43. The square tube 42 is heated and heats the water inside the water tower 3, realizing the utilization of the waste heat of the flue gas and improving the working efficiency of the boiler body 1. Then, the flue gas stagnates inside the square tube 42 and starts the booster fan 47 to work. The booster fan 47 draws external air into the inside of the cross tube 48. The cross tube 48 injects air into the inside of the square tube 42. The square tube 42 is rapidly circulated by the air injection to prevent sticking to the tube wall. Finally, the flue gas enters the inside of the filter box 51 and works with the grid 52 to intercept dust particles. The flue gas enters the inside of the conveying pipe 53 through the grid 52 and is discharged to the outside through the conveying pipe 53, achieving the effect of filtration and environmental protection.

[0038] In summary, this equipment for optimizing the efficiency of circulating fluidized bed boilers, through the coordinated use of the boiler body 1, flue pipe 2, water tower 3, heating mechanism 4, outer shell 41, square pipe 42, guide pipe 43, water pump 44, discharge pipe 45, support 46, booster fan 47, cross pipe 48, and treatment mechanism 5, solves the problem of existing boilers emitting large amounts of flue gas pollution when burning high-alkali and high-chlorine coal, and the problem of easy blockage of pipelines.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An apparatus for optimizing the efficiency of a circulating fluidized bed boiler, characterized in that, Include: The boiler body (1); The top of the boiler body (1) is communicated with the exhaust pipe (2), the right side of the boiler body (1) is provided with the water tower (3), the front end and the back end of the inner wall of the water tower (3) are fixedly connected with the heating mechanism (4); The heating mechanism (4) includes a shell (41), a square tube (42), a guide pipe (43), a water pump (44), a discharge pipe (45), a bracket (46), a booster fan (47) and a cross pipe (48), the front end and the back end of the inner wall of the water tower (3) are fixedly connected with the shell (41), the inner side of the shell (41) is fixedly connected with the square tube (42), the end of the exhaust pipe (2) away from the boiler body (1) penetrates into the inside of the water tower (3) and communicates with the front end of the square tube (42), the left side of the bottom of the square tube (42) is communicated with each other through the pipeline, the left side of the square tube (42) is communicated with the guide pipe (43), the left side of the guide pipe (43) penetrates through the left side of the water tower (3), the bottom of the front end of the water tower (3) is fixedly installed with the water pump (44), the back end of the water pump (44) is communicated with the front end of the water tower (3) through the pipeline, the top of the water pump (44) is communicated with the discharge pipe (45), the top of the inner cavity of the water tower (3) is transversely fixedly connected with the bracket (46), the inner side of the bracket (46) is fixedly connected with the booster fan (47), the output end of the booster fan (47) is communicated with the cross pipe (48), the left side and the right side of the cross pipe (48) are communicated with the inner side of the square tube (42), the air inlet of the booster fan (47) penetrates through the back end of the water tower (3), the end of the guide pipe (43) away from the water tower (3) is communicated with the processing mechanism (5).

2. An apparatus for optimizing the efficiency of a circulating fluidized bed boiler according to claim 1, characterized in that: The processing mechanism (5) includes a filter box (51), a grid net (52) and a conveying pipe (53), the end of the guide pipe (43) away from the water tower (3) is communicated with the filter box (51), the front end and the back end of the inner cavity of the filter box (51) are transversely fixedly connected with the grid net (52), the front end of the filter box (51) is communicated with the conveying pipe (53).

3. An apparatus for optimizing the efficiency of a circulating fluidized bed boiler as claimed in claim 1, wherein: The bottom of the water pump (44) is fixedly connected with the base (6), the bottom of the base (6) is in contact with the ground, and the base (6) is used in cooperation with the water pump (44).

4. An apparatus for optimizing the efficiency of a circulating fluidized bed boiler as claimed in claim 1, wherein: The left side and the right side of the bottom of the boiler body (1) are fixedly connected with the supporting legs (7), the bottom of the supporting legs (7) is in contact with the ground, and the supporting legs (7) are used in cooperation with the boiler body (1).

5. An apparatus for optimizing the efficiency of a circulating fluidized bed boiler as claimed in claim 1, wherein: The number of the square tubes (42) is several, and they are uniformly distributed, the square tubes (42) are used in cooperation with the water tower (3).

6. An apparatus for optimizing the efficiency of a circulating fluidized bed boiler as claimed in claim 1, wherein: The output end of the booster fan (47) is communicated with the cross pipe (48), and the cross pipe (48) is used in cooperation with the square tube (42).

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