Flue gas treatment device for circulating fluidized bed boiler

Abstract

A circulating fluidized bed boiler flue gas treatment device comprises a flue gas collecting box and a rotating plate, the interior of the flue gas collecting box is divided into a filtering cavity and an adjusting cavity through a partition plate, a fixing frame is fixedly connected into a fixing groove formed in the filtering cavity through an embedding plate, a flow dividing groove is formed in the upper end of the fixing frame, and liquid discharging grooves are symmetrically formed in the bottoms of the two sides of the flow dividing groove; the rotating plate is movably connected into the adjusting cavity, an inner cavity of the rotating plate communicates with an inner cavity of the partition plate through a penetrating opening, the side, away from the partition plate, of the rotating plate is fixedly connected with a main rotating rod, the main rotating rod is movably connected with a smoke receiving box through a bearing, and meanwhile storage grooves are symmetrically formed in the side face of the adjusting cavity; the positioning block is slidably connected into the storage groove through a spring and a fixing rod. Through cooperation of the fixing frame, the filter screen, the liquid discharging groove and the flow dividing groove, the filtering effect of the device on dust particles in smoke can be enhanced, and the probability that the dust particles pollute the environment is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a flue gas treatment technical field, concretely relates to a circulating fluidized bed boiler flue gas treatment device. BACKGROUND

[0002] The circulating fluidized bed boiler adopts the highest industrialization degree clean coal combustion technology, adopts fluidized combustion, and mainly includes a combustion chamber (including a dense phase zone and a dilute phase zone) and a circulating back furnace (including a high-temperature gas-solid separator and a return system), two parts, in the prior art, the flue gas generated by the boiler combustion is generally mixed with a large amount of heat, and direct emission into the air will cause heat loss and energy loss.

[0003] After searching, the prior art discloses a circulating fluidized bed boiler for effectively treating flue gas (application number: CN201920297994.6), which is characterized in that the first connecting rod is rotatably connected with the first sliding block through the pin shaft, the first sliding block is slidably connected with a plurality of baffles, one end of the baffle is welded to the mounting plate, the other end of the baffle is welded to the fixed plate, the first sliding block is located between the two baffles, a breaking hammer is welded to the end of the first sliding block away from the rotating rod, the breaking hammer is slidably connected with a breaking chamber, the breaking chamber is welded to the inner bottom wall of the breaking device body, and the connecting rod is provided with two. The exhaust port of the boiler is always kept open during flue gas recovery, which will cause the heat loss of the flue gas in the smoke collection box, and the flue gas discharged from the boiler contains corresponding dust particles, so that the direct open exhaust port will cause a large amount of flue gas to be emitted to the outside, and the solid particles will cause great pollution to the external environment, and the boiler needs to open the sealing cover first during drainage, connect the corresponding equipment at the sealing cover, and then open the stop valve, so that the flue gas is discharged from the drainage pipe to the corresponding equipment, so that the actual operation process of flue gas drainage is relatively complicated and not convenient. UTILITY MODEL CONTENTS

[0004] The utility model aims at solving the above problems, and provides a circulating fluidized bed boiler flue gas treatment device.

[0005] The above purpose is realized by the following technical scheme:

[0006] A circulating fluidized bed boiler flue gas treatment device comprises: a smoke collection box and a rotating plate. A tail flue is fixedly connected to one end of the smoke collection box, and a diversion pipe and an exhaust pipe are fixedly connected to the other end of the smoke collection box. The smoke collection box is divided into a filter chamber and an adjustment chamber by a partition plate. A fixed frame is fixedly connected to a fixed groove in the filter chamber by a fitting plate. A diversion groove is opened at the upper end of the fixed frame, and drainage grooves are symmetrically opened at the bottom of both sides of the diversion groove. A filter screen is fixedly connected to the middle of the fixed frame. At the same time, the bottom of the inner side of the fixed frame is connected to a collection groove through a recovery hole. The collection groove is opened at the bottom of the fixed groove and is connected to a waste liquid tank. The waste liquid tank is fixedly connected to the lower surface of the smoke collection box. The rotating plate is movably connected to the adjustment chamber. The inner cavity of the rotating plate is connected to the inner cavity of the partition plate through a through-hole. A main rotating rod is fixedly connected to the side of the rotating plate away from the partition plate. The main rotating rod is movably connected to the smoke collection box through a bearing. At the same time, a collection groove is symmetrically opened on the side of the adjustment chamber. A positioning block is slidably connected to the collection groove through a spring and a fixed rod.

[0007] The circulating fluidized bed boiler flue gas treatment device has a rectangular structure for the smoke collection box, a square structure for the filter chamber inside the smoke collection box, and a cylindrical structure for the regulating chamber. The top and bottom of the regulating chamber are connected to the exhaust pipe and the diversion pipe, respectively. At the same time, the side of the fixed groove is provided with a corresponding fitting groove relative to the position of the fitting plate.

[0008] The circulating fluidized bed boiler flue gas treatment device described above has a partition plate with an outer square and inner circular structure. The inner cavity of the partition plate has a frustum-shaped structure, and the dimensions of the adjustment cavity and the rotating plate are matched. Meanwhile, the rotating plate has a cylindrical structure, and the axial section formed by the combination of the inner cavity of the rotating plate and the through-hole has a convex shape.

[0009] In the circulating fluidized bed boiler flue gas treatment device, the outer surface of the rotating plate is provided with a positioning groove corresponding to the position of the positioning block. The positioning groove is square and the positioning block is rectangular. The cross-section formed by the positioning block and the fixing rod is convex. At the same time, a spring is sleeved on the surface of the fixing rod.

[0010] The circulating fluidized bed boiler flue gas treatment device has a fixed frame with a U-shaped structure, a filter screen fixedly connected to the fixed frame with a square structure, and a bottom cross-section of the fixed frame with an isosceles trapezoidal structure. At the same time, multiple sets of recovery holes are opened parallel and equally spaced on both sides of the bottom of the fixed frame relative to the position of the filter screen, and the cross-section of the confluence channel connected to the recovery holes has an isosceles trapezoidal structure.

[0011] The circulating fluidized bed boiler flue gas treatment device has a convex-shaped cross-section for the diversion trough at the upper end of the fixed frame, and two sets of elongated drain troughs at the bottom of the diversion trough. The length of the drain trough is greater than the length of the diversion trough, and the cross-section formed by the combination of the diversion trough and the drain trough is Y-shaped.

[0012] The bottom of the liquid discharge groove is provided with a plurality of groups of liquid injection holes in parallel and at equal intervals, the liquid injection holes are in the structure of a circular truncated cone, the lower end of the liquid injection hole is inclined to the side of the filter screen, two groups of receiving cavities are symmetrically arranged on the upper end of the fixed frame, the receiving cavities are in the structure of a square, the middle part of the receiving cavity is movably connected with the moving lead screw through a bearing, the middle part of the moving lead screw is connected with the auxiliary rotating rod through a bevel gear, the auxiliary rotating rod is movably connected with the upper surface of the fixed frame through a bearing, and the two ends of the moving lead screw are symmetrically screwed with the two groups of embedded plates. Beneficial effects

[0013] 1. The utility model discloses a smoke collecting box, rotating plate, main rotating rod, positioning block, fixed rod and spring cooperation, make the rotating plate inner chamber can be in the communication of drainage tube simultaneously, close exhaust pipe, avoid the heat loss of the smoke in the smoke collecting box, and through the rotation of rotating plate, also can conveniently complete the operation of smoke drainage or exhaust, improve the convenience of smoke drainage regulation, and through the cooperation of the shunt groove and the mixed liquid discharge groove, make the filter liquid flow on the surface of the filter screen, thereby can assist to enhance the filtering effect of the filter screen on dust particles, reduce the pollution effect of dust particles on the environment. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the front view schematic drawing of the utility model embodiment;

[0015] Figure 2 It is the left view schematic drawing of the utility model embodiment;

[0016] Figure 3 It is the right view schematic drawing of the utility model embodiment;

[0017] Figure 4 It is the A place enlarged schematic drawing of the utility model embodiment; Figure 1

[0018] In the drawing: 1, tail flue;2, smoke collecting box;3, filter screen;4, fixed frame;5, waste liquid tank;6, flow collection groove;7, recovery hole;8, drainage tube;9, rotating plate;10, main rotating rod;11, partition plate;12, exhaust pipe;13, liquid discharge groove;14, moving lead screw;15, auxiliary rotating rod;16, shunt groove;17, embedded plate;18, positioning block. DETAILED DESCRIPTION

[0019] Refer to Figures 1 to 4 ​The utility model provides a kind of circulating fluidized bed boiler flue gas treatment device, comprising: smoke collection box 2 and rotary plate 9, tail flue 1 is fixedly connected the one end of smoke collection box 2, and the other end of smoke collection box 2 is fixedly connected drainage tube 8 and exhaust pipe 12 respectively, the filter cavity and the adjusting cavity are divided by partition 11 in the smoke collection box 2, and fixed frame 4 is fixedly connected in the fixed groove of filter cavity by fitting plate 17, and fixed frame 4 upper end is equipped with shunt groove 16, and the bottom of the both sides of shunt groove 16 is symmetrically equipped with drainage groove 13, and fixed frame 4 middle part is fixedly connected filter screen 3, while the bottom of the inside surface of fixed frame 4 is communicated with the flow groove 6 by recycling hole 7, and the flow groove 6 is equipped in the bottom of fixed groove, and the flow groove 6 is communicated with waste liquid tank 5, and waste liquid tank 5 is fixedly connected on the lower surface of smoke collection box 2, the rotary plate 9 is movably connected in the adjusting cavity, and the inner cavity of rotary plate 9 is communicated with the inner cavity of partition 11 by through hole, and the side of rotary plate 9 away from partition 11 is fixedly connected main rotating rod 10, and main rotating rod 10 is movably connected smoke collection box 2 by bearing, while adjusting cavity side is symmetrically equipped with storage slot, and positioning block 18 is slidably connected in storage slot by spring and fixed rod.

[0020] In the embodiment, when the recovery treatment of flue gas is needed, the fixed rod with drainage label is pulled, the fixed rod drives the corresponding positioning block 18 to separate from the positioning groove of rotary plate 9, the restriction between adjusting cavity and rotary plate 9 is removed, rotary plate 9 is rotated by 180 degrees by main rotating rod 10, when the positioning groove is opposite to another set of positioning block 18, the positioning block 18 is embedded in the positioning groove under the action of compression spring, then the fixed connection between adjusting cavity and rotary plate 9 is completed, so that the gas outlet on the side of rotary plate 9 is changed from communicating with drainage pipe to communicating with drainage tube 8, then flue gas flows into smoke collection box 2 through tail flue 1, and is preliminarily filtered by filter screen 3 in the process of flue gas flow, the content of dust particles in flue gas is reduced, at the same time, the valve of liquid injection pipe is opened, the filter liquid is injected into shunt groove 16 by liquid injection pipe, is sprayed to the surface of filter screen 3 through drainage groove 13 and liquid injection hole, and the filter liquid moves downward under the action of gravity, so that the filter liquid is distributed on the surface of filter screen 3, thereby the filtering effect of filter screen 3 on dust particles can be assisted and enhanced, and the filter liquid flows into flow groove 6 through recycling hole 7, then flows into waste liquid tank 5 through flow groove 6, which is convenient for subsequent recycling.

[0021] As a kind of preferable implementation, smoke collection box 2 is overall rectangular structure, the filter cavity equipped in smoke collection box 2 is square structure, and the adjusting cavity is cylindrical structure, and the top and bottom of adjusting cavity are communicated with exhaust pipe 12 and drainage tube 8 respectively, while the position of fixed groove opposite fitting plate 17 is equipped with fitting groove.

[0022] In the embodiment, as Figure 1 And Figure 3, the arrangement of the filtering cavity and the adjusting cavity enables the smoke collection box 2 to preliminarily filter the flue gas, thereby reducing the pollution effect of dust particles on the environment, and the arrangement of the embedded groove facilitates the fixed frame 4 to be fixedly connected to the smoke collection box 2 through the embedded plate 17.

[0023] As a preferable embodiment, the partition plate 11 has an outer square and inner circular structure as a whole, the inner cavity of the partition plate 11 has a circular truncated cone structure, the adjusting cavity and the rotating plate 9 are appropriately sized, the rotating plate 9 has a cylindrical structure, and the inner cavity of the rotating plate 9 and the through hole together form a convex-shaped structure in the axial section.

[0024] In the embodiment, the partition plate 11 has an outer square and inner circular structure as a whole, the inner cavity of the partition plate 11 has a circular truncated cone structure, the adjusting cavity and the rotating plate 9 are appropriately sized, the rotating plate 9 has a cylindrical structure, and the inner cavity of the rotating plate 9 and the through hole together form a convex-shaped structure in the axial section. Figure 1 Figure 3 The structure of the inner cavity of the partition plate 11 can assist in guiding the circulation of the flue gas, the adjusting cavity and the rotating plate 9 are appropriately sized, which can assist in enhancing the sealing performance of the connection between the adjusting cavity and the rotating plate 9, and the side surface of the inner cavity of the rotating plate 9 is only provided with a group of gas outlets.

[0025] As a preferable embodiment, the outer surface of the rotating plate 9 is provided with a positioning groove corresponding to the position of the positioning block 18, the positioning groove has a square structure, the positioning block 18 has a rectangular structure, the positioning block 18 and the fixed rod together form a convex-shaped structure in the section, and the surface of the fixed rod is sleeved with a spring.

[0026] In the embodiment, the outer surface of the rotating plate 9 is provided with a positioning groove corresponding to the position of the positioning block 18, the positioning groove has a square structure, the positioning block 18 has a rectangular structure, the positioning block 18 and the fixed rod together form a convex-shaped structure in the section, and the surface of the fixed rod is sleeved with a spring. Figure 1 Figure 4 The end of the positioning block 18 away from the fixed rod has a prismatic truncated cone structure, which can assist in quickly embedding the positioning block 18 into the positioning groove, and the two groups of fixed rods are respectively fixedly connected to the drainage label and the smoke exhaust label, thereby facilitating workers to quickly determine the state of the smoke collection box 2.

[0027] As a preferable embodiment, the fixed frame 4 has a mouth-shaped structure, the filtering net 3 fixedly connected to the fixed frame 4 has a square structure, the bottom section in the fixed frame 4 has an isosceles trapezoidal structure, a plurality of groups of recovery holes 7 are respectively and parallelly and equidistantly provided on both sides of the bottom in the fixed frame 4 corresponding to the position of the filtering net 3, and the cross-flow groove 6 connected with the recovery holes 7 has an isosceles trapezoidal structure in the section.

[0028] In the embodiment, the fixed frame 4 has a mouth-shaped structure, the filtering net 3 fixedly connected to the fixed frame 4 has a square structure, the bottom section in the fixed frame 4 has an isosceles trapezoidal structure, a plurality of groups of recovery holes 7 are respectively and parallelly and equidistantly provided on both sides of the bottom in the fixed frame 4 corresponding to the position of the filtering net 3, and the cross-flow groove 6 connected with the recovery holes 7 has an isosceles trapezoidal structure in the section. Figure 1 Figure 2 The groove in the bottom of the fixed frame 4 can prevent the filtering net 3 from overflowing to the bottom of the smoke collection box 2, and ensure that the filtering liquid can smoothly flow into the waste liquid tank 5 through the recovery holes 7 and the cross-flow groove 6.

[0029] ​​​As a preferred embodiment, the cross-section of the diversion channel 16 opened at the upper end of the fixed frame 4 is convex, and the two sets of drainage channels 13 opened at the bottom of the diversion channel 16 are both elongated. The length of the drainage channel 13 is greater than the length of the diversion channel 16. At the same time, the cross-section formed by the diversion channel 16 and the drainage channel 13 together is Y-shaped.

[0030] In this embodiment, as Figure 1 and Figure 2 The combination of the diversion channel 16 and the drainage channel 13 allows the filter liquid to be sprayed out from the top two sides of the fixed frame 4, so that the filter liquid can flow on both sides of the filter screen 3, thereby helping to enhance the filtration effect of the filter screen 3 on dust particles.

[0031] In a preferred embodiment, multiple sets of spray holes are opened at equal intervals on the bottom of the drain tank 13. The spray holes are in the shape of a frustum, and the opening at the lower end of the spray holes is inclined towards the filter screen 3. At the same time, two sets of receiving cavities are symmetrically opened on both sides of the upper end of the fixed frame 4. The receiving cavities are in the shape of a square. The middle of the receiving cavity is movably connected to the moving screw 14 through the bearing. The middle of the moving screw 14 is connected to the auxiliary rotating rod 15 through the helical gear. The auxiliary rotating rod 15 is movably connected to the upper surface of the fixed frame 4 through the bearing. Two sets of interlocking plates 17 are symmetrically screwed to both ends of the moving screw 14.

[0032] In this embodiment, as Figure 1 and Figure 2 The structure of the spray hole allows the filtrate to fall smoothly onto the surface of the filter screen 3. Furthermore, rotating the secondary rotating rod 15 causes the moving screw 14 to rotate synchronously via a helical gear. The moving screw 14 then pushes the two sets of screwed-on interlocking plates 17 to move relative to each other or away from each other, facilitating changes in the connection state between the smoke collection box 2 and the fixed frame 4, and thus facilitating subsequent processing of the filter screen 3.

[0033] The circulating fluidized bed boiler flue gas treatment equipment of this utility model, through the cooperation of the fixed frame 4, filter screen 3, drain tank 13 and diversion tank 16, can enhance the filtration effect of the equipment on dust particles in the flue gas and reduce the probability of dust particles polluting the environment. Moreover, through the cooperation of the partition plate 11, rotating plate 9, main rotating rod 10, fixed rod, positioning block 18 and spring, the flue gas collection box 2 can be easily adjusted for diversion, improving the convenience of flue gas diversion adjustment.

Claims

1. A circulating fluidized bed boiler flue gas treatment apparatus, consisting of: The utility model relates to a smoke collecting box and rotating plate, one end of the smoke collecting box is fixedly connected with the tail flue, the other end of the smoke collecting box is fixedly connected with the drainage pipe and the smoke exhaust pipe respectively, characterized in that: the smoke collecting box is divided into a filtering cavity and an adjusting cavity by a partition plate, a fixed frame is fixedly connected in a fixed groove of the filtering cavity through an embedded plate, a shunt groove is formed in the upper end of the fixed frame, two symmetrical liquid discharge grooves are formed in the bottom of the shunt groove, a filter screen is fixedly connected in the middle of the fixed frame, the bottom of the inner side of the fixed frame is connected with a flow collection groove through a recovery hole, the flow collection groove is formed in the bottom of the fixed groove, the flow collection groove is connected with a waste liquid tank, the waste liquid tank is fixedly connected with the lower surface of the smoke collecting box, the rotating plate is movably connected in the adjusting cavity, the inner cavity of the rotating plate is connected with the inner cavity of the partition plate through a through hole, the side of the rotating plate away from the partition plate is fixedly connected with a main rotating rod, the main rotating rod is movably connected with the smoke collecting box through a bearing, the adjusting cavity is symmetrically provided with a receiving groove on the side, a positioning block is slidably connected in the receiving groove through a spring and a fixed rod.

2. A circulating fluidized bed boiler flue gas treatment apparatus according to claim 1, characterized in that: The utility model relates to a smoke collecting box and rotating plate, one end of the smoke collecting box is fixedly connected with the tail flue, the other end of the smoke collecting box is fixedly connected with the drainage pipe and the smoke exhaust pipe respectively, characterized in that: the smoke collecting box is divided into a filtering cavity and an adjusting cavity by a partition plate, a fixed frame is fixedly connected in a fixed groove of the filtering cavity through an embedded plate, a shunt groove is formed in the upper end of the fixed frame, two symmetrical liquid discharge grooves are formed in the bottom of the shunt groove, a filter screen is fixedly connected in the middle of the fixed frame, the bottom of the inner side of the fixed frame is connected with a flow collection groove through a recovery hole, the flow collection groove is formed in the bottom of the fixed groove, the flow collection groove is connected with a waste liquid tank, the waste liquid tank is fixedly connected with the lower surface of the smoke collecting box, the rotating plate is movably connected in the adjusting cavity, the inner cavity of the rotating plate is connected with the inner cavity of the partition plate through a through hole, the side of the rotating plate away from the partition plate is fixedly connected with a main rotating rod, the main rotating rod is movably connected with the smoke collecting box through a bearing, the adjusting cavity is symmetrically provided with a receiving groove on the side, a positioning block is slidably connected in the receiving groove through a spring and a fixed rod.

3. A circulating fluidized bed boiler flue gas treatment apparatus according to claim 1, characterized in that: The utility model relates to a smoke collecting box and rotating plate, one end of the smoke collecting box is fixedly connected with the tail flue, the other end of the smoke collecting box is fixedly connected with the drainage pipe and the smoke exhaust pipe respectively, characterized in that: the smoke collecting box is divided into a filtering cavity and an adjusting cavity by a partition plate, a fixed frame is fixedly connected in a fixed groove of the filtering cavity through an embedded plate, a shunt groove is formed in the upper end of the fixed frame, two symmetrical liquid discharge grooves are formed in the bottom of the shunt groove, a filter screen is fixedly connected in the middle of the fixed frame, the bottom of the inner side of the fixed frame is connected with a flow collection groove through a recovery hole, the flow collection groove is formed in the bottom of the fixed groove, the flow collection groove is connected with a waste liquid tank, the waste liquid tank is fixedly connected with the lower surface of the smoke collecting box, the rotating plate is movably connected in the adjusting cavity, the inner cavity of the rotating plate is connected with the inner cavity of the partition plate through a through hole, the side of the rotating plate away from the partition plate is fixedly connected with a main rotating rod, the main rotating rod is movably connected with the smoke collecting box through a bearing, the adjusting cavity is symmetrically provided with a receiving groove on the side, a positioning block is slidably connected in the receiving groove through a spring and a fixed rod.

4. A circulating fluidized bed boiler flue gas treatment apparatus according to claim 1, characterized in that: The utility model relates to a smoke collecting box and rotating plate, one end of the smoke collecting box is fixedly connected with the tail flue, the other end of the smoke collecting box is fixedly connected with the drainage pipe and the smoke exhaust pipe respectively, characterized in that: the smoke collecting box is divided into a filtering cavity and an adjusting cavity by a partition plate, a fixed frame is fixedly connected in a fixed groove of the filtering cavity through an embedded plate, a shunt groove is formed in the upper end of the fixed frame, two symmetrical liquid discharge grooves are formed in the bottom of the shunt groove, a filter screen is fixedly connected in the middle of the fixed frame, the bottom of the inner side of the fixed frame is connected with a flow collection groove through a recovery hole, the flow collection groove is formed in the bottom of the fixed groove, the flow collection groove is connected with a waste liquid tank, the waste liquid tank is fixedly connected with the lower surface of the smoke collecting box, the rotating plate is movably connected in the adjusting cavity, the inner cavity of the rotating plate is connected with the inner cavity of the partition plate through a through hole, the side of the rotating plate away from the partition plate is fixedly connected with a main rotating rod, the main rotating rod is movably connected with the smoke collecting box through a bearing, the adjusting cavity is symmetrically provided with a receiving groove on the side, a positioning block is slidably connected in the receiving groove through a spring and a fixed rod.

5. A circulating fluidized bed boiler flue gas treatment apparatus according to claim 1, characterized in that: ​ 6. A circulating fluidized bed boiler flue gas treatment apparatus according to claim 1, characterized in that: ​ 7. A circulating fluidized bed boiler flue gas treatment apparatus according to claim 1, characterized in that: ​

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