Precise self-cleaning system for rotary air pre-heater

Abstract

The utility model discloses an accurate self-cleaning system of a rotary air pre-heater, and belongs to the technical field of air preheating equipment. The precise self-cleaning system of the rotary air pre-heater comprises a heat storage device; one end of the first pipeline is connected with the heat storage device, and the first pipeline is provided with a plurality of first air ducts; the pipeline valve comprises a shell, a valve plate and a driving mechanism, the shell is connected with the other end of the first pipeline, a plurality of second air ducts are arranged in the shell, the second air ducts are in one-to-one correspondence with the first air ducts and can be communicated with the first air ducts, the valve plate is rotationally arranged on the second air ducts, and the driving mechanism is connected with the valve plate; the driving mechanism can drive the valve plate to rotate so as to adjust the circulation area of the second air channel. According to the scheme, the problems that the circulation area of the cold end circulation branch bin of the rotary air pre-heater is larger than the circulation area of the hot air circulation pipeline, so that circulation hot air is not evenly distributed, regional soot blowing is achieved, and consequently heat storage elements are not even in cold and heat, partially corroded and blocked can be solved.

Description

Technical Field

[0001] The present application belongs to the technical field of air preheating equipment, and specifically relates to a precise self-cleaning system for a rotary air preheater. Background Art

[0002] The rotary air preheater (rotary air preheater) transfers heat in a regenerative manner, with flue gas and air flowing alternately over the heating surface. When the flue gas flows through, the heat is transferred from the flue gas to the heating surface, the temperature of the heating surface rises, and the heat is accumulated; when the air flows through again, the heating surface releases the accumulated heat to the air.

[0003] During the rotation of the air preheater, sulfuric acid vapor in the flue gas easily condenses on the cold end heat storage element, causing the heat storage element to corrode and adhere to dust, which leads to corrosion and damage of the cold end heat storage element and reduces the heat exchange efficiency of the air preheater. In order to solve the problem of low-temperature corrosion and blockage of the heat storage element at the cold end of the air preheater, a circulation compartment and a circulation fan are added to the cold end of the air preheater, and high-temperature, high-flow hot air is introduced into the air compartment to heat and purge the heat storage element.

[0004] Since the circulation area of ​​the cold end of the air preheater is larger than the circulation area of ​​the hot air circulation pipe, the circulating hot air is unevenly distributed and regional soot blowing occurs, which causes uneven cooling and heating of the heat storage element, partial corrosion and blockage. If the air volume of the circulating fan is further increased, it will not only increase the power consumption of the circulating fan, but also affect the life and safety of the circulating fan. Utility Model Content

[0005] The purpose of the embodiment of the present application is to provide a rotary air preheater precision self-cleaning system, which can solve the problem that the circulation area of ​​the cold end circulation compartment of the air preheater is larger than the circulation area of ​​the hot air circulation pipeline, resulting in uneven distribution of the circulating hot air and regional soot blowing, thus causing uneven cooling and heating of the heat storage element, partial corrosion and blockage.

[0006] In order to solve the above technical problems, this application is implemented as follows:

[0007] The embodiment of the present application provides a rotary air preheater precision self-cleaning system, the rotary air preheater precision self-cleaning system comprising:

[0008] Thermal storage device;

[0009] A first pipeline, one end of which is connected to the heat storage device, and the first pipeline is provided with a plurality of first air ducts;

[0010] A pipeline valve, the pipeline valve includes a shell, a valve plate and a driving mechanism, the shell is connected to the other end of the first pipeline, a plurality of second air ducts are arranged in the shell, the second air ducts correspond to the first air ducts one by one, and the second air ducts can be communicated with the first air ducts, the valve plate is rotatably arranged in the second air duct, the driving mechanism is connected to the valve plate, and the driving mechanism can drive the valve plate to rotate to adjust the flow area of ​​the second air duct.

[0011] In the embodiment of the present application, air can enter the first air duct through the second air duct and blow toward the heat storage device. The driving mechanism can drive the valve plate to rotate to adjust the flow area of ​​the second air duct, so as to control the air volume flowing into the second air duct and make the wind force more concentrated, uniform and flexible to blow the heat storage device. The pipeline valve can be designed into three air ducts. After the air passes through the pipeline valve, it enters different positions of the heat storage device respectively, which ensures the air volume while also blowing and heating each position of the heat storage device in a targeted manner, solving the problem of uneven and incomplete cleaning of the heat storage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a partial structural schematic diagram of the rotary air preheater precision self-cleaning system disclosed in the embodiment of the present application;

[0013] Figure 2 This is a schematic diagram of the structure of the pipeline valve disclosed in the embodiment of the present application.

[0014] Description of reference numerals:

[0015] 100-heat storage device;

[0016] 200-first pipeline, 210-first air duct;

[0017] 300-pipe valve, 310-housing, 311-second air duct, 320-valve plate, 321-strip groove, 330-driving mechanism, 331-driving source, 332-transmission rod, 333-rotating shaft, 334-mounting bracket, 340-limiting member;

[0018] 400 - second pipeline, 410 - first section, 420 - second section. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0020] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0021] The rotary air preheater precision self-cleaning system provided in the embodiment of the present application is described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0022] like Figure 1 to Figure 2 As shown, the present application provides a rotary air preheater precision self-cleaning system, which includes a heat storage device 100, a first pipeline 200 and a pipeline valve 300.

[0023] The heat storage device 100 is mounted on the rotor. As the rotor rotates, the heat storage device 100 sequentially passes through the flue gas and the air to achieve heat exchange. One end of the first pipe 200 is connected to the heat storage device 100, and the first pipe 200 is provided with a plurality of first air ducts 210. The pipeline valve 300 includes a shell 310, a valve plate 320 and a driving mechanism 330. The shell 310 is connected to the other end of the first pipe 200. A plurality of second air ducts 311 are provided in the shell 310. The second air ducts 311 correspond to the first air ducts 210 one by one, and the second air ducts 311 can be connected to the first air duct 210. The valve plate 320 is rotatably arranged in the second air duct 311. The driving mechanism 330 is connected to the valve plate 320, and the driving mechanism can drive the valve plate 320 to rotate to adjust the flow area of ​​the second air duct 311. The shell 310 can be a rectangular parallelepiped structure.

[0024] In the embodiment of the present application, air can enter the first air duct 210 through the second air duct 311 and blow toward the heat storage device 100. The driving mechanism can drive the valve plate 320 to rotate to adjust the flow area of ​​the second air duct 311, so as to control the air volume flowing into the second air duct 311, and make the wind force more concentrated, uniform and flexible to blow the heat storage device 100. The pipeline valve 300 can be designed as three air ducts. After the air passes through the pipeline valve 300, it enters different positions of the heat storage device 100 respectively, which ensures the air volume while also blowing and heating each position of the heat storage device 100 in a targeted manner, solving the problem of uneven and incomplete cleaning of the heat storage device.

[0025] The driving mechanism 330 includes a driving source 331, a transmission rod 332 and a rotating shaft 333. The driving source 331 is arranged on the housing 310. One end of the transmission rod 332 is rotatably connected to the driving source 331. The other end of the transmission rod 332 is slidably matched with the valve plate 320. The rotating shaft 333 is rotatably arranged on the other end of the transmission rod 332. The transmission rod 332 is slidably matched with the valve plate 320 through the rotating shaft 333. The valve plate 320 is provided with a strip groove 321. The other end of the transmission rod 332 is slidably matched with the strip groove 321. The driving source 331 drives the transmission rod 332 to move. While the transmission rod 332 moves, it drives the valve plate 320 to rotate, so as to adjust the flow area of ​​the second air duct 311. The driving source 331 can be a cylinder. The transmission rod 332 is slidably matched with the strip groove 321 through the rotating shaft 333, which can reduce friction and facilitate the rotation of the valve plate 320.

[0026] The driving mechanism 330 further includes a mounting bracket 334 , which is disposed on the housing 310 , and the driving source 331 is disposed on the mounting bracket 334 . The mounting bracket 334 extends obliquely in a direction away from the housing 310 , which is beneficial to the layout of the driving source 331 .

[0027] The rotary air preheater precision self-cleaning system further includes a second pipeline 400, which can be connected to the shell 310 and is disposed on a side of the shell 310 away from the first pipeline 200. The second pipeline 400 can facilitate the flow of air into the pipeline valve 300.

[0028] In the direction away from the housing 310, the size of the second pipe 400 gradually decreases, so that the space occupied by the second pipe 400 is reduced. The second pipe 400 includes a first section 410 and a second section 420. In the direction away from the housing 310, the size of the first section 410 gradually decreases, and the size of the second section 420 remains unchanged.

[0029] The pipeline valve 300 further includes a stopper 340, which is disposed in the housing 310 and can contact the valve plate 320. The stopper 340 can keep the valve plate 320 stable at a certain position. The pipeline valve 300 further includes a rotating shaft 350, through which the valve plate 320 is rotatably connected to the housing 310.

[0030] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A rotary air preheater precision self-cleaning system, characterized in that: include: A heat storage device (100); A first pipeline (200), one end of the first pipeline (200) being connected to the heat storage device (100), and the first pipeline (200) being provided with a plurality of first air ducts (210); A pipeline valve (300), the pipeline valve (300) comprising a shell (310), a valve plate (320) and a driving mechanism (330), the shell (310) being connected to the other end of the first pipeline (200), a plurality of second air ducts (311) being arranged in the shell (310), the second air ducts (311) corresponding to the first air ducts (210) one by one, and the second air ducts (311) being communicable with the first air ducts (210), the valve plate (320) being rotatably arranged in the second air duct (311), the driving mechanism (330) being connected to the valve plate (320), and the driving mechanism (330) being capable of driving the valve plate (320) to rotate so as to adjust the flow area of ​​the second air duct (311).

2. The rotary air preheater precision self-cleaning system according to claim 1 is characterized in that: The driving mechanism (330) comprises a driving source (331) and a transmission rod (332), wherein the driving source (331) is arranged on the housing (310), one end of the transmission rod (332) is connected to the driving source (331), and the other end of the transmission rod (332) is slidably matched with the valve plate (320).

3. The rotary air preheater precision self-cleaning system according to claim 2 is characterized in that: The valve plate (320) is provided with a strip groove (321), and the other end of the transmission rod (332) is slidably matched with the strip groove (321).

4. The rotary air preheater precision self-cleaning system according to claim 2 is characterized in that: The driving mechanism (330) further comprises a mounting bracket (334), wherein the mounting bracket (334) is arranged on the housing (310), the driving source (331) is arranged on the mounting bracket (334), and the mounting bracket (334) extends obliquely in a direction away from the housing (310).

5. The rotary air preheater precision self-cleaning system according to claim 1, characterized in that: The rotary air preheater further comprises a second pipe (400), the second pipe (400) being communicable with the shell (310), and the second pipe (400) being arranged on a side of the shell (310) away from the first pipe (200).

6. The rotary air preheater precision self-cleaning system according to claim 5, characterized in that: In a direction away from the housing (310), the size of the second pipe (400) gradually decreases.

7. The rotary air preheater precision self-cleaning system according to claim 1, characterized in that: The pipeline valve (300) further comprises a stopper (340), wherein the stopper (340) is arranged in the housing (310), and the stopper (340) can contact the valve plate (320).

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