Extended heat exchange anti-abrasion energy-saving device for water-cooled wall metal module of circulating fluidized bed boiler

Abstract

The utility model discloses a circulating fluidized bed boiler water cooling wall metal module expansion heat exchange anti-abrasion energy-saving device which aims at solving the technical problems that an existing circulating fluidized bed boiler is high in energy consumption, complex in adjustment and not easy to control. The high-temperature-resistant module comprises a plurality of high-temperature-resistant modules which are connected end to end, each high-temperature-resistant module comprises M rows of transverse metal plates and N columns of longitudinal metal plates, each row of transverse metal plates comprises a plurality of transverse metal plate assemblies which are connected end to end, and each column of longitudinal metal plates comprises a plurality of longitudinal metal plate assemblies which are connected end to end; the metal plate assembly comprises a clamping groove and a clamping plate, and a clamping piece used for fixing the clamping plate is arranged on the clamping groove. The energy-saving and efficiency-increasing furnace has the advantages of being convenient to install and capable of adjusting the temperature in the furnace and achieving the purposes of saving energy and increasing efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of CFB boilers, in particular to a circulating fluidized bed boiler water-cooled wall metal module expansion heat exchange anti-wear energy-saving device. Background Art

[0002] Circulating fluidized bed (CFB) boilers have the advantages of strong fuel adaptability, large load adjustment range, high combustion efficiency, and low pollutant emissions, and are widely used in the field of clean coal combustion power generation. The furnace temperature should be maintained within a suitable range according to different furnace conditions. If the furnace temperature is low, the fuel will not burn fully. If the furnace temperature is high, the equipment burden will increase and the heat resources cannot be effectively utilized, resulting in waste. The existing methods for adjusting the furnace temperature are usually to change the fuel consumption or adjust the air intake, but the above methods are dynamic adjustments, which are complex to operate and difficult to control, and have lags, making it difficult to achieve ideal results. Utility Model Content

[0003] The utility model provides a circulating fluidized bed boiler water-cooled wall metal module expansion heat exchange anti-wear energy-saving device to solve the technical problems of high energy consumption, complex regulation and difficult control of the existing circulating fluidized bed boiler.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A circulating fluidized bed boiler water-cooled wall metal module extended heat exchange wear-proof energy-saving device is designed, the water-cooled wall has an arc-shaped pipe surface and a horizontal connection surface, including a plurality of high-temperature resistant modules connected end to end, the high-temperature resistant modules include M rows of transverse metal plates and N columns of longitudinal metal plates, each row of transverse metal plates includes a plurality of transverse metal plate assemblies connected end to end, and each column of longitudinal metal plates includes a plurality of longitudinal metal plate assemblies connected end to end;

[0006] The transverse metal plate assembly includes a transverse slot and a transverse clamping plate. The bottom surface of the transverse slot includes an arc surface and a horizontal surface. The bottom surface matches the surface of the water-cooled wall. The transverse clamping plate is clamped in the transverse slot. The transverse slot is provided with a first clamping member for fixing the transverse clamping plate.

[0007] The longitudinal metal plate assembly includes a longitudinal slot and a longitudinal clamping plate. The bottom surface of the longitudinal slot is a plane that matches the horizontal connection surface of the water-cooled wall. The longitudinal clamping plate is clamped in the longitudinal slot. The longitudinal slot is provided with a second clamping piece for fixing the longitudinal clamping plate.

[0008] Furthermore, the transverse card slots in the same row and the longitudinal card slots in the same column are connected end to end by welding or wedge-shaped card blocks.

[0009] Furthermore, the first clamping component includes a first sleeve and a first clamping column, the first sleeve is fixed on the upper surface of the transverse clamping groove, the transverse clamping groove has a first through hole at a corresponding position of the first sleeve, the transverse clamping plate has a second through hole at a corresponding position of the first through hole, the top of the first clamping column has a first abutting portion abutting against the top of the first sleeve, the middle part of the inner side of the first sleeve is provided with a first stroke limit portion, and the middle part of the first clamping column is provided with a first limit block corresponding to the first stroke limit portion.

[0010] Furthermore, the second clamping member includes a second sleeve and a second clamping column, the second sleeve is fixed to the side of the longitudinal clamping groove, the longitudinal clamping groove has a third through hole at the corresponding position of the second sleeve, the longitudinal clamping plate has a fourth through hole at the corresponding position of the third through hole, the top of the second clamping column has a second abutting portion abutting against the top of the second sleeve, the middle part of the inner side of the second sleeve is provided with a second stroke limit portion, the middle part of the second clamping column has a second limit block corresponding to the second stroke limit portion, and a reset spring is connected between the second stroke limit portion and the second limit block.

[0011] Furthermore, a positioning nut is threadedly connected to the bottom of the second clamping column.

[0012] Furthermore, the bottoms of the first clamping column and the second clamping column are both inclined surfaces facing outwards.

[0013] Furthermore, the transverse clamping slot and the longitudinal clamping slot are provided with protruding portions at the positions of the first clamping column and the second clamping column respectively, and the first clamping column and the second clamping column are provided on the protruding portions.

[0014] Compared with the prior art, the beneficial technical effects of the utility model are:

[0015] 1. The utility model can affect the temperature in the furnace by increasing or decreasing the number of grids. For example, increasing the number of horizontal metal plates can hinder the downward flow of coal powder, and the contact time between coal powder and water-cooled wall is long, which can reduce the furnace temperature. Increasing the number of vertical metal plates is conducive to accelerating the fall of coal powder, reducing the contact time with water-cooled wall, and can increase the furnace temperature. Therefore, by designing the distance and number of horizontal and vertical metal plates, the temperature in the furnace can be maintained at an appropriate value, which can not only improve the utilization efficiency of fuel, but also reduce energy consumption.

[0016] 2. The utility model adopts a modular metal plate structure, which is convenient for installing and replacing the number of metal plate layers, and the number of metal plates can be adjusted according to the use of the boiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model.

[0018] Figure 2 It is a structural schematic diagram of the horizontal metal plate assembly of the utility model.

[0019] Figure 3 It is a structural schematic diagram of the longitudinal metal plate assembly of the utility model.

[0020] Figure 4 It is a structural schematic diagram of the clamping member of the utility model.

[0021] Figure 5 It is a connection diagram of the horizontal / vertical slots of the utility model.

[0022] In the figure, a water-cooled wall 1, an arc-shaped pipe surface 11, a horizontal connecting surface 12, a transverse metal plate 2, a transverse metal plate assembly 21, a transverse groove 211, a transverse clamping plate 212, a first clamping piece 213, a longitudinal metal plate 3, a longitudinal metal plate assembly 31, a longitudinal groove 311, a longitudinal clamping plate 312, a second clamping piece 313, a first sleeve 41, a first clamping column 42, a first travel limit portion 411, a first limit block 421, a first abutment portion 422, and a wedge-shaped clamping block 5. DETAILED DESCRIPTION

[0023] The specific implementation modes of the present invention are described below in conjunction with the accompanying drawings and embodiments. However, the following embodiments are only used to illustrate the present invention in detail and do not limit the scope of the present invention in any way.

[0024] Example 1: A circulating fluidized bed boiler water wall metal module expansion heat exchange anti-wear energy saving device, see Figures 1 to 5 The device is installed on the boiler water-cooled wall. The water-cooled wall 1 has an arc-shaped pipe surface 11 and a horizontal connecting surface 12. The device includes a plurality of high-temperature resistant modules connected end to end. The high-temperature resistant modules include M rows of transverse metal plates 2 and N columns of longitudinal metal plates 3. Each row of transverse metal plates includes a plurality of transverse metal plate assemblies 21 connected end to end, and each column of longitudinal metal plates includes a plurality of longitudinal metal plate assemblies 31 connected end to end.

[0025] Since the powdered fuel in the furnace will wash the water-cooled wall and cause wear, relevant technicians have proposed adding a grid anti-wear plate on the water-cooled wall to reduce the wear of the water-cooled wall. In practice, the inventors found that the grid anti-wear plate can not only prevent wear, but also have an impact on the temperature in the furnace. Specifically, increasing the number of horizontal metal plates can reduce the furnace temperature, and increasing the number of vertical grid layers can increase the furnace temperature. Therefore, the inventors proposed the above-mentioned grid structure, using the grid plate to adjust the temperature in the furnace.

[0026] Transverse metal sheet component 21 see Figure 2, including a transverse slot 211 and a transverse clamping plate 212. The transverse slot 211 is a curved strip with a slot on the top surface and a bottom surface including an arc surface and a horizontal surface. The bottom surface matches the surface of the water-cooled wall. The shape of the transverse clamping plate 212 matches the slot on the top surface of the transverse slot 211. When in use, it is clamped in the transverse slot 211. The transverse slot 211 is provided with a first clamping piece 213 for fixing the transverse metal plate 212.

[0027] The longitudinal metal plate assembly 31 is shown in Figure 3 , similar to the structure of the horizontal metal plate assembly 21, including a longitudinal slot 311 and a longitudinal clamping plate 312. The bottom surface of the longitudinal slot 311 is a plane, matching the horizontal connecting surface 12 of the water-cooled wall 1. The longitudinal slot 311 is a vertical strip. The longitudinal clamping plate 312 is clamped in the longitudinal slot 311. The longitudinal slot 311 is provided with a second clamping member 313 for fixing the longitudinal metal plate 312.

[0028] The first clamping member 213 Figure 4 , including a first sleeve 41 and a first clamping column 42, the first sleeve 41 is fixed on the upper surface of the transverse clamping groove 211, the transverse clamping groove 211 has a first through hole at a corresponding position of the first sleeve 41, the transverse clamping plate 212 has a second through hole at a corresponding position of the first through hole, the top of the first clamping column 42 has a first abutting portion 422 abutting against the top of the first sleeve, the middle part of the inner side of the first sleeve 41 is provided with a first stroke limiting portion 411, and the middle part of the first clamping column 42 is provided with a first limit block 421 corresponding to the first stroke limiting portion 411.

[0029] The second clamping member 313 is similar to the first clamping member 213, and includes a second sleeve and a second clamping column. The second sleeve is fixed to the side of the longitudinal clamping groove 311. The longitudinal clamping groove 311 has a third through hole at the corresponding position of the second sleeve. The longitudinal clamping plate 312 has a fourth through hole at the corresponding position of the third through hole. The top of the second clamping column has a second abutting portion abutting against the top of the second sleeve. The middle part of the inner side of the second sleeve is provided with a second stroke limit portion. The middle part of the second clamping column has a second limit block corresponding to the second stroke limit portion. The difference is that since the second clamping member 313 is arranged on the side of the longitudinal clamping groove 313, in order to prevent it from falling off, a reset spring 421 is connected between the second stroke limit portion and the second limit block. Of course, in order to increase stability, a reset spring can also be provided in the first clamping member 213.

[0030] In order to further reinforce the clamping piece, a positioning nut is connected by threading at the bottom of the first clamping column and the second clamping column. In order to facilitate the access of the clamping plate to the clamping slot, the bottom of the first clamping column and the second clamping column is set to a slope facing outward. The transverse clamping slots 211 located in the same row and the longitudinal clamping slots 311 located in the same column are connected at the ends by welding or wedge-shaped clamping blocks 5. Since the transverse / longitudinal clamping slots are narrow, it is convenient to minimize the obstruction to the coal powder after removing the grid plate. Therefore, in order to provide installation space for the clamping piece set thereon, a protrusion can be extended outward on the transverse / longitudinal clamping slot, and the clamping piece is set on the protrusion.

[0031] When in use, the high temperature resistant module can be pre-assembled, and then the horizontal / vertical slots can be welded to the surface of the water-cooled wall, and then the horizontal / vertical metal plates can be clamped in the slots. Combined with practice, simulation and other means are used to obtain the influence of the high temperature resistant module on the temperature, and the appropriate metal plate spacing is designed. If it is found that the overall or local temperature does not meet the requirements during use, the machine can be stopped and some metal plates can be removed to make the temperature in the furnace reach the optimal value and achieve the goal of energy saving and efficiency improvement.

[0032] The utility model is described in detail above with reference to the accompanying drawings and embodiments. However, those skilled in the art will appreciate that, without departing from the spirit of the utility model, the specific parameters in the above embodiments may be changed to form a plurality of specific embodiments, which are all within the common variation range of the utility model and will not be described in detail here.

Claims

1. A circulating fluidized bed boiler water wall metal module expansion heat exchange anti-wear energy-saving device, the water wall has an arc-shaped pipe surface and a horizontal connection surface, characterized in that: The high temperature resistant modules include M rows of transverse metal plates and N columns of longitudinal metal plates, each row of transverse metal plates includes a plurality of transverse metal plate assemblies connected end to end, and each column of longitudinal metal plates includes a plurality of longitudinal metal plate assemblies connected end to end; The transverse metal plate assembly includes a transverse slot and a transverse clamping plate. The bottom surface of the transverse slot includes an arc surface and a horizontal surface. The bottom surface matches the surface of the water-cooled wall. The transverse clamping plate is clamped in the transverse slot. The transverse slot is provided with a first clamping member for fixing the transverse clamping plate. The longitudinal metal plate assembly includes a longitudinal slot and a longitudinal clamping plate. The bottom surface of the longitudinal slot is a plane that matches the horizontal connection surface of the water-cooled wall. The longitudinal clamping plate is clamped in the longitudinal slot. The longitudinal slot is provided with a second clamping piece for fixing the longitudinal clamping plate.

2. The circulating fluidized bed boiler water wall metal module expansion heat exchange anti-wear energy-saving device according to claim 1, characterized in that: The transverse card slots in the same row and the longitudinal card slots in the same column are connected end to end by welding or wedge-shaped card blocks.

3. The circulating fluidized bed boiler water-cooled wall metal module expansion heat exchange anti-wear energy-saving device according to claim 1, characterized in that: The first clamping component includes a first sleeve and a first clamping column. The first sleeve is fixed on the upper surface of the transverse clamping groove. The transverse clamping groove has a first through hole at a corresponding position of the first sleeve. The transverse clamping plate has a second through hole at a corresponding position of the first through hole. The top of the first clamping column has a first abutting portion abutting against the top of the first sleeve. The middle part of the inner side of the first sleeve is provided with a first stroke limit portion. The middle part of the first clamping column is provided with a first limit block corresponding to the first stroke limit portion.

4. The circulating fluidized bed boiler water-cooled wall metal module expansion heat exchange anti-wear energy-saving device according to claim 3, characterized in that: The second clamping member includes a second sleeve and a second clamping column. The second sleeve is fixed to the side of the longitudinal clamping groove. The longitudinal clamping groove has a third through hole at the corresponding position of the second sleeve. The longitudinal clamping plate has a fourth through hole at the corresponding position of the third through hole. The top of the second clamping column has a second abutting portion abutting against the top of the second sleeve. A second stroke limit portion is provided in the middle part of the inner side of the second sleeve. The middle part of the second clamping column has a second limit block corresponding to the second stroke limit portion. A reset spring is connected between the second stroke limit portion and the second limit block.

5. The circulating fluidized bed boiler water-cooled wall metal module expansion heat exchange anti-wear energy-saving device according to claim 4, characterized in that: The bottom of the second clamping column is threadedly connected with a positioning nut.

6. The circulating fluidized bed boiler water-cooled wall metal module expansion heat exchange anti-wear energy-saving device according to claim 4, characterized in that: The bottoms of the first clamping column and the second clamping column are both inclined surfaces facing outward.

7. The circulating fluidized bed boiler water-cooled wall metal module expansion heat exchange anti-wear energy-saving device according to claim 4, characterized in that: The transverse clamping slot and the longitudinal clamping slot are provided with protruding portions at the positions of the first clamping column and the second clamping column respectively, and the first clamping column and the second clamping column are provided on the protruding portions.

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