Waste heat deoxidizing device of coal-fired boiler

Abstract

The utility model discloses a waste heat deoxidizing device of a coal-fired boiler, and relates to the technical field of coal-fired boilers. The device comprises a shell, wherein a stirring mechanism, an exhaust mechanism and a heating mechanism are arranged on the shell; the stirring mechanism comprises a stirring assembly, a pumping assembly and a connecting assembly, the stirring assembly comprises a motor fixedly connected to the shell, the motor is fixedly connected with a rotating shaft, the rotating shaft is fixedly connected with a rotating cylinder, the bottom surface of the rotating cylinder is rotationally connected with the shell, the rotating cylinder is provided with a plurality of access holes, the rotating cylinder is fixedly connected with a rotating pipe, and the rotating pipe is fixedly connected with a plurality of stirring rods. Through the stirring mechanism, a plurality of stirring rods are driven by a motor to rotate to stir boiler water, the boiler water is heated in cooperation with the heating mechanism, and the boiler water is stirred to generate fine bubbles in the boiler water, so that oxygen generated after dissolved oxygen in the water is heated and converted is conveniently driven to be discharged and separated from the boiler water; and the deoxidizing efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of coal-fired boilers, and particularly relates to a waste heat deaeration device for a coal-fired boiler. Background Technique

[0002] A coal-fired boiler is also called a coal-fired steam boiler. A coal-fired steam boiler refers to a boiler that burns coal. After the heat of the coal is converted, steam is generated, but not all of the heat is effectively converted. There is a part of it that is consumed in vain, so there is an efficiency problem. Generally, larger boilers have higher efficiency, between 60% and 80%. A coal-fired steam boiler mainly consists of a pulverized coal preparation system, a burner, a heating surface, an air preheater and other main parts.

[0003] However, in a coal-fired boiler system, the boiler water is usually recycled. After heating and evaporation, the boiler water may contain a certain amount of dissolved oxygen. If this oxygen is not removed, it may cause oxidation corrosion of the boiler pipes or the boiler body, shortening the service life of the device and requiring personnel to perform regular maintenance and repairs on the boiler. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a waste heat deaeration device for a coal-fired boiler. By arranging a stirring mechanism, the motor is used to drive a plurality of stirring rods to rotate to stir the boiler water, so as to generate fine bubbles in it to drive the oxygen to be discharged, and solve the problem that if the oxygen in the boiler water is not removed, it may cause oxidation corrosion of the boiler pipes or the boiler body.

[0005] To solve the above technical problems, the utility model is realized through the following technical solutions:

[0006] The utility model is a waste heat deaeration device for a coal-fired boiler, which includes a housing. A stirring mechanism, an exhaust mechanism and a heating mechanism are arranged on the housing;

[0007] The stirring mechanism includes a stirring component, a pumping component and a connecting component. The stirring component includes a motor fixedly connected to the bottom surface of the housing. The output end of the motor is fixedly connected with a rotating shaft. The top end of the rotating shaft extends to the inner bottom wall of the housing and is fixedly connected with a rotating cylinder. The bottom surface of the rotating cylinder is rotatably connected with the inner bottom wall of the housing. A plurality of inlet and outlet holes are arranged on the outer wall of the rotating cylinder. The top surface of the rotating cylinder is fixedly connected with a rotating pipe. A plurality of stirring rods are fixedly connected to the outer wall of the rotating pipe.

[0008] Further, the pumping component includes a connecting port opened on the top surface of the housing. A sealing ring is fixedly connected to the inner top wall of the housing. The inner wall of the sealing ring is rotatably connected with the outer wall of the rotating pipe. A piston pump is fixedly connected to the top surface of the housing.

[0009] Further, the connection component includes a connecting pipe fixedly connected to the output end of the piston pump. A receiving block is fixedly connected to the outer wall of the connecting pipe, and the bottom surface of the receiving block is fixedly connected to the top surface of the housing.

[0010] Further, the exhaust mechanism includes a sealing component, a spring component, and a clamping component. The clamping component includes an exhaust valve housing fixedly connected to the top surface of the housing. A sealing piece is rotatably connected to the inner wall of the exhaust valve housing, and a first fixing block is fixedly connected to the outer wall of the exhaust valve housing.

[0011] Further, the spring component includes a connecting shaft fixedly connected to the inner wall of the sealing piece. The front end of the connecting shaft extends to the front surface of the first fixing block and is fixedly connected to a handle. Two springs are fixedly connected to the inner wall of the handle.

[0012] Further, the clamping component includes a button fixedly connected to the ends of the two springs. The inner wall of the button is slidably connected to the outer wall of the connecting shaft. A card slot is formed in the front surface of the first fixing block, and a plurality of clamping blocks are slidably connected to the inner wall of the card slot. One side of the plurality of clamping blocks close to each other is fixedly connected to the outer wall of the button.

[0013] Further, the heating mechanism includes a heat conduction component and a support component. The heat conduction component includes an air inlet pipe fixedly connected to the outer wall of the housing. The right end of the air inlet pipe extends to the inner wall of the housing and is fixedly connected to a heat conduction pipe. The end of the heat conduction pipe is fixedly connected to an air outlet pipe, and the left end of the air outlet pipe extends to the outer wall of the housing and is fixedly connected to the housing.

[0014] Further, the support component includes a plurality of second fixing blocks fixedly connected to the inner wall of the housing. The inner walls of the plurality of second fixing blocks are all fixedly connected to the outer wall of the heat conduction pipe, and a plurality of support columns are fixedly connected to the bottom surface of the housing.

[0015] The utility model has the following beneficial effects:

[0016] 1. By arranging the stirring mechanism, it realizes driving a plurality of stirring rods to rotate by a motor to stir the boiler water, and cooperating with the heating mechanism to heat the boiler water. Stirring the boiler water makes fine bubbles generated in it, which is used to conveniently drive the oxygen generated after the dissolved oxygen in the water is heated to be discharged, separated from the boiler water, and improves the efficiency of deaeration.

[0017] 2. By arranging the exhaust mechanism, it realizes using the elasticity of the spring, cooperating with the stirring mechanism and the heating mechanism. The staff only needs to press the button and turn the handle to unseal the housing in the sealed state, which is convenient for the oxygen to be discharged to complete the deaeration treatment. The sealed state can be artificially adjusted, and to a certain extent, it avoids the outside air entering the housing during the stages other than the oxygen discharge process and affecting the deaeration result.

[0018] Of course, it is not necessary for any product implementing the present utility model to simultaneously achieve all the above-mentioned advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present utility model, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0021] Figure 2 It is a schematic diagram of the rear view structure of the present utility model;

[0022] Figure 3 It is a schematic diagram of the rear view sectional structure of the present utility model;

[0023] Figure 4 It is a schematic diagram of the partial sectional structure of the present utility model;

[0024] Figure 5 For Figure 3 It is an enlarged schematic diagram of the structure at A in

[0025] In the accompanying drawings, the list of components represented by each reference numeral is as follows:

[0026] 1, outer shell; 2, stirring mechanism; 3, exhaust mechanism; 4, heating mechanism; 21, motor; 22, rotating shaft; 23, rotating cylinder; 24, inlet and outlet holes; 25, rotating pipe; 26, stirring rod; 27, connection port; 28, sealing ring; 29, piston pump; 210, connecting pipe; 211, receiving block; 31, exhaust valve housing; 32, sealing sheet; 33, first fixing block; 34, connecting shaft; 35, handle; 36, spring; 37, button; 38, card slot; 39, card block; 41, intake pipe; 42, heat conducting pipe; 43, outlet pipe; 44, second fixing block; 45, support column. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.

[0028] Please refer to Figures 1-5As shown in the figure, the utility model is a waste heat deaeration device for a coal-fired boiler, which comprises a housing 1, and a stirring mechanism 2, an exhaust mechanism 3 and a heating mechanism 4 are arranged on the housing 1;

[0029] The stirring mechanism 2 includes a stirring assembly, a pumping assembly and a connecting assembly. The stirring assembly includes a motor 21 fixedly connected to the bottom surface of the housing 1. The output end of the motor 21 is fixedly connected with a rotating shaft 22. The top end of the rotating shaft 22 extends to the inner bottom wall of the housing 1 and is fixedly connected with a rotating cylinder 23. The bottom surface of the rotating cylinder 23 is rotatably connected with the inner bottom wall of the housing 1. A plurality of inlet and outlet holes 24 are formed in the outer wall of the rotating cylinder 23. The top surface of the rotating cylinder 23 is fixedly connected with a rotating pipe 25, and a plurality of stirring rods 26 are fixedly connected to the outer wall of the rotating pipe 25.

[0030] As shown in Figure 2 , Figure 3 and Figure 5 shown, the pumping assembly includes a connection port 27 formed on the top surface of the housing 1. A sealing ring 28 is fixedly connected to the inner top wall of the housing 1. The inner wall of the sealing ring 28 is rotatably connected with the outer wall of the rotating pipe 25. A piston pump 29 is fixedly connected to the top surface of the housing 1. The connecting assembly includes a connecting pipe 210 fixedly connected to the output end of the piston pump 29. A receiving block 211 is fixedly connected to the outer wall of the connecting pipe 210. The bottom surface of the receiving block 211 is fixedly connected with the top surface of the housing 1.

[0031] By setting the stirring mechanism 2, the motor 21 is driven to drive a plurality of stirring rods 26 to rotate to stir the boiler water, and the heating mechanism 4 is used to heat the boiler water. The boiler water is stirred to generate fine bubbles in it, which is convenient for driving the oxygen generated after the dissolved oxygen in the water is heated to be discharged, separated from the boiler water, and the deaeration efficiency is improved.

[0032] As shown in Figure 2 and Figure 4 shown, the exhaust mechanism 3 includes a sealing assembly, a spring assembly and a clamping assembly. The clamping assembly includes an exhaust valve housing 31 fixedly connected to the top surface of the housing 1. A sealing piece 32 is rotatably connected to the inner wall of the exhaust valve housing 31. A first fixing block 33 is fixedly connected to the outer wall of the exhaust valve housing 31. The spring assembly includes a connecting shaft 34 fixedly connected to the inner wall of the sealing piece 32. The front end of the connecting shaft 34 extends to the front surface of the first fixing block 33 and is fixedly connected with a handle 35. Two springs 36 are fixedly connected to the inner wall of the handle 35. The clamping assembly includes a button 37 fixedly connected to the ends of the two springs 36. The inner wall of the button 37 is slidably connected with the outer wall of the connecting shaft 34. A clamping groove 38 is formed in the front surface of the first fixing block 33. A plurality of clamping blocks 39 are slidably connected to the inner wall of the clamping groove 38. One side of the plurality of clamping blocks 39 close to each other is fixedly connected with the outer wall of the button 37.

[0033] By setting up the exhaust mechanism 3, the elasticity of the spring 36 is utilized, in cooperation with the stirring mechanism 2 and the heating mechanism 4. The staff only needs to press the button 37 and turn the handle 35 to unseal the outer shell 1 in a sealed state, facilitating the discharge of oxygen to complete the deoxidation treatment. The sealed state can be artificially adjusted, to a certain extent, to prevent external air from entering the outer shell 1 during stages other than the oxygen discharge process and affecting the deoxidation result.

[0034] Among them, as Figure 2 , Figure 3 and Figure 5 shown, the heating mechanism 4 includes a heat conduction component and a support component. The heat conduction component includes an intake pipe 41 fixedly connected to the outer wall of the outer shell 1. The right end of the intake pipe 41 extends to the inner wall of the outer shell 1 and is fixedly connected to a heat conduction pipe 42. The end of the heat conduction pipe 42 is fixedly connected to an outlet pipe 43. The left end of the outlet pipe 43 extends to the outer wall of the outer shell 1 and is fixedly connected to the outer shell 1. The support component includes a number of second fixing blocks 44 fixedly connected to the inner wall of the outer shell 1. The inner walls of the number of second fixing blocks 44 are all fixedly connected to the outer wall of the heat conduction pipe 42. A number of support columns 45 are fixedly connected to the bottom surface of the outer shell 1.

[0035] By setting up the heating mechanism 4, based on the principle of heat energy transduction, the heat energy of the steam in the heat conduction pipe 42 is conducted into the boiler water in the outer shell 1 through the heat conduction pipe 42 to heat and deoxidize the boiler water, and the waste heat generated by the boiler is recycled. The steam that has completed heating is discharged from the outlet pipe 43 or circulated back into the boiler.

[0036] A specific application of this embodiment is: The piston pump 29 is also called an electric reciprocating pump. It is divided into single-cylinder and multi-cylinder from the structure. Its characteristic is a relatively high head and is suitable for transporting oil emulsions without solid particles at normal temperature, etc. The piston pump 29 relies on the reciprocating motion of the piston, causing the working volume of the pump cavity to change periodically to achieve the suction and discharge of liquid. It consists of a pump cylinder, a piston, inlet and outlet valves, inlet and outlet pipes, connecting rods, and a transmission device. Driven by power, the piston reciprocates in the pump cylinder. When the piston moves upward, the inlet valve opens, and water enters the pump cylinder. At the same time, the water valve on the piston closes, and the water above the piston is lifted upward with the piston; when the piston moves downward, the inlet valve closes, the valve on the piston opens, and at the same time, the water pressure in the lower cavity of the pump cylinder is pressed into the upper cavity and rises into the outlet pipe. In this way, water is continuously sucked in and lifted, and the water is continuously discharged from the outlet pipe. The piston pump 29 is divided into single- and double-acting types; single-, double-, and multi-cylinder types; horizontal, vertical, and inclined types; motor-driven, manual, pedal, and animal-powered types. The flow rate Q of the piston pump 29 is 0.71 - 6000 m³ / h, the discharge pressure P2 ≤ 39.2 MPa, and in most cases P2 ≤ 24.5 MPa. The flow rate of the piston pump 29 is determined by the pump cylinder diameter, piston stroke, and the number of reciprocations of the piston per minute; the head depends on the characteristics of the device pipeline. For the same piston pump 29, the flow rate remains unchanged, while the head can change with the characteristics of the device pipeline, that is, when the head increases, the flow rate remains unchanged, and only in the high-pressure area, the flow rate decreases slightly.

[0037] By setting up the stirring mechanism 2, the connecting pipe 210 is connected to the boiler. The piston pump 29 is driven to pump the boiler water in the boiler into the connecting pipe 210 through the connection port 27 and then transported to the rotating pipe 25. Among them, the receiving block 211 plays a role in receiving and fixing the connecting pipe 210. The boiler water enters the rotating cylinder 23 through the rotating pipe 25, and the water flows into the outer shell 1 through several inlet and outlet holes 24. The piston pump 29 continuously pumps. After the boiler water pumping is completed, the driving motor 21 drives the rotating shaft 22 to rotate, the rotating shaft 22 drives the rotating cylinder 23 to rotate, and the rotating cylinder 23 drives the rotating pipe 25 to rotate. When the rotating pipe 25 rotates, it rotates inside the inner wall of the sealing ring 28 and plays a sealing role at the connection between the rotating pipe 25 and the connection port 27. The rotation of the rotating pipe 25 drives several stirring rods 26 to stir the boiler water in the outer shell 1. In cooperation with the heating mechanism 4, high-temperature steam is transported into the heat conduction pipe 42 and then conducted into the boiler water through heat conduction. Through continuous stirring and heating, after a period of operation, part of the dissolved oxygen in the boiler water is converted into a gaseous state. Through stirring, small bubbles are easily formed in the water, driving the oxygen to float to the water surface. In cooperation with the exhaust mechanism 3, the oxygen is discharged. After deaeration, the piston pump 29 pumps the boiler water in the outer shell 1 into the rotating pipe 25 and then transports it back to the boiler through the connecting pipe 210 in the same way as above. It realizes the use of the motor 21 to drive several stirring rods 26 to rotate to stir the boiler water, cooperate with the heating mechanism 4 to heat the boiler water, stir the boiler water to generate fine bubbles in it, which is convenient for driving the oxygen in the water to be discharged after heating conversion, separating from the boiler water, and improving the deaeration efficiency.

[0038] By setting up the exhaust mechanism 3, in cooperation with the stirring mechanism 2 and the heating mechanism 4, the oxygen in the boiler water is discharged. The operator presses the button 37 and turns the handle 35. At this time, the spring 36 is in a compressed state. The button 37 drives several clamping blocks 39 to disengage from the clamping grooves 38 of the first fixing block 33, which is convenient for turning the handle 35 to drive the connecting shaft 34 to rotate. The connecting shaft 34 drives the sealing piece 32 to rotate in the exhaust valve housing 31, so that the oxygen discharged from the boiler water in the outer shell 1 is discharged through the exhaust valve housing 31, and the top of the exhaust valve housing 31 can be connected to a storage device to collect the discharged oxygen, etc. It realizes the use of the elasticity of the spring 36, in cooperation with the stirring mechanism 2 and the heating mechanism 4. The operator only needs to press the button 37 and turn the handle 35 to unseal the outer shell 1 in a sealed state, which is convenient for the oxygen to be discharged to complete the deaeration treatment. The sealing state can be artificially adjusted, to a certain extent, to prevent external air from entering the outer shell 1 during stages other than the oxygen discharge process and affecting the deaeration result.

[0039] Through the heating mechanism 4, the intake pipe 41 is connected to the boiler. The steam containing a large amount of waste heat generated when the boiler is heated is connected and conveyed into the heat conduction pipe 42. In cooperation with the stirring mechanism 2, based on the principle of heat energy conduction, the heat energy of the steam in the heat conduction pipe 42 is conducted into the boiler water in the outer shell 1 through the heat conduction pipe 42 to heat and deoxygenate the boiler water, and the waste heat generated by the boiler is recycled. The steam that has completed heating is discharged from the outlet pipe 43 or circulated into the boiler. A number of second fixing blocks 44 are provided to play a role in fixing and supporting the heat conduction pipe 42, and a number of support columns 45 are provided to play a role in fixing and supporting the outer shell 1.

[0040] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0041] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not elaborate on all details and do not limit the present invention to the specific embodiments described. Obviously, according to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present invention, so that those skilled in the art can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A waste heat deoxidization device for a coal-fired boiler, comprising a housing (1), wherein a stirring mechanism (2), an exhaust mechanism (3) and a heating mechanism (4) are arranged on the housing (1), and it is characterized in that: The stirring mechanism (2) includes a stirring component, a pumping component and a connecting component. The stirring component includes a motor (21) fixedly connected to the bottom surface of the housing (1). The output end of the motor (21) is fixedly connected with a rotating shaft (22). The top end of the rotating shaft (22) extends to the inner bottom wall of the housing (1) and is fixedly connected with a rotating cylinder (23). The bottom surface of the rotating cylinder (23) is rotationally connected to the inner bottom wall of the housing (1). A plurality of inlet and outlet holes (24) are formed in the outer wall of the rotating cylinder (23). The top surface of the rotating cylinder (23) is fixedly connected with a rotating pipe (25). A plurality of stirring rods (26) are fixedly connected to the outer wall of the rotating pipe (25).

2. The waste heat deaeration device for a coal-fired boiler according to claim 1, wherein, The pumping component includes a connection port (27) formed in the top surface of the housing (1). A sealing ring (28) is fixedly connected to the inner top wall of the housing (1). The inner wall of the sealing ring (28) is rotationally connected to the outer wall of the rotating pipe (25). A piston pump (29) is fixedly connected to the top surface of the housing (1).

3. The waste heat deaeration device for a coal-fired boiler according to claim 2, characterized in that, The connecting component includes a connecting pipe (210) fixedly connected to the output end of the piston pump (29). A receiving block (211) is fixedly connected to the outer wall of the connecting pipe (210). The bottom surface of the receiving block (211) is fixedly connected to the top surface of the housing (1).

4. The waste heat deaerator of a coal-fired boiler according to claim 3, characterized in that, The exhaust mechanism (3) includes a sealing component, a spring component and a clamping component. The clamping component includes an exhaust valve housing (31) fixedly connected to the top surface of the housing (1). A sealing piece (32) is rotationally connected to the inner wall of the exhaust valve housing (31). A first fixing block (33) is fixedly connected to the outer wall of the exhaust valve housing (31).

5. The waste heat deaerator of a coal-fired boiler according to claim 4, characterized in that The spring component includes a connecting shaft (34) fixedly connected to the inner wall of the sealing piece (32). The front end of the connecting shaft (34) extends to the front surface of the first fixing block (33) and is fixedly connected with a handle (35). Two springs (36) are fixedly connected to the inner wall of the handle (35).

6. The waste heat deaerator of a coal-fired boiler according to claim 5, characterized in that, The clamping component includes a button (37) fixedly connected to the ends of the two springs (36). The inner wall of the button (37) is slidably connected to the outer wall of the connecting shaft (34). A clamping groove (38) is formed in the front surface of the first fixing block (33). A plurality of clamping blocks (39) are slidably connected to the inner wall of the clamping groove (38). One side of the plurality of clamping blocks (39) close to each other is fixedly connected to the outer wall of the button (37).

7. The waste heat deaerator of a coal-fired boiler according to claim 6, characterized in that, The heating mechanism (4) includes a heat conduction component and a support component. The heat conduction component includes an air inlet pipe (41) fixedly connected to the outer wall of the housing (1). The right end of the air inlet pipe (41) extends to the inner wall of the housing (1) and is fixedly connected with a heat conduction pipe (42). The end of the heat conduction pipe (42) is fixedly connected with an air outlet pipe (43). The left end of the air outlet pipe (43) extends to the outer wall of the housing (1) and is fixedly connected with the housing (1).

8. The waste heat deaerator for a coal-fired boiler according to claim 7, characterized in that, The support assembly includes a plurality of second fixing blocks (44) fixedly connected to the inner wall of the housing (1). The inner walls of the plurality of second fixing blocks (44) are fixedly connected to the outer wall of the heat conducting tube (42). A plurality of support columns (45) are fixedly connected to the bottom surface of the housing (1).

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