Air chamber system suitable for two-section reciprocating fire grate waste incineration device

Abstract

The utility model relates to a waste incineration device, and aims to provide an air chamber system suitable for a two-section reciprocating fire grate waste incineration device, and the air chamber system has the capability of independently regulating air for each air chamber. According to the technical scheme, the air chamber system is suitable for the two-section reciprocating type fire grate garbage incineration device. A partition plate is vertically arranged in the middle of the public air chamber and divides the public air chamber and the primary air inlet into a left part and a right part which are isolated from each other. Each ventilation air door is provided with an air door cover plate and an electric actuating mechanism for driving the air door cover plate through a transmission shaft, so that the distribution proportion of primary air entering the four ventilation air doors of the left air chamber and the four ventilation air doors of the right air chamber can be changed by adjusting the proportion of the ventilation air doors shielded by the air door cover plates; therefore, the system has the capability of adjusting the combustion conditions of different incineration sections of the single-row fire grate.

Description

Technical Field

[0001] The utility model relates to a garbage incineration device, in particular to a wind chamber system suitable for a two-stage reciprocating grate garbage incineration device. Background Art

[0002] The mechanical reciprocating grate has the advantages of large processing capacity, no need for garbage pretreatment, full and stable combustion, small amount of fly ash, and low thermal loss rate. It has become the mainstream process for the incineration of domestic waste in my country. Among them, the two-stage reciprocating grate also has the advantages of small footprint, large mechanical load, and small ash leakage. It occupies a very large market share, has achieved good economic and social benefits, and has contributed to the resource utilization of domestic waste. In the wind chamber system of the two-stage reciprocating grate garbage incineration device, four wind chambers are arranged under each row of grates, corresponding to the drying section, volatilization section, combustion section and burnout section of the grate respectively. The left and right rows of grates have a total of eight wind chambers, and these eight wind chambers are connected to the public wind chamber arranged therein through ventilation dampers 4 of different sizes. Small dampers of different sizes can distribute the primary air entering the public wind chamber in a fixed proportion and then enter each wind chamber to provide oxygen for the incineration of domestic waste. The air chamber structure of this primary air supply method is simple. If the domestic garbage put into combustion meets the initial design conditions, the operation and maintenance personnel can ensure the continuous and stable operation of the combustion without too much operation. However, due to the complex composition of garbage in my country and the large fluctuation of calorific value with the change of seasons, coupled with the mixing of sludge and industrial waste, this fixed-ratio primary air supply method causes unstable combustion, the fire bed is sometimes long and sometimes short, and even the situation of incomplete combustion occurs. It is in urgent need of improvement. Utility Model Content

[0003] The utility model aims to overcome the shortcomings of the above-mentioned background technology and provide a wind chamber system suitable for a two-stage reciprocating grate garbage incineration device, which has the ability to adjust the air flow of each wind chamber individually.

[0004] The technical solution provided by the utility model is:

[0005] A wind chamber system for a two-stage reciprocating grate garbage incineration device, comprising a left wind chamber, a right wind chamber and a common wind chamber arranged between the left wind chamber and the right wind chamber; a primary air inlet is arranged at the lower part of the common wind chamber, and four ventilation dampers connecting the left wind chamber and the right wind chamber are arranged on the left and right sides of the common wind chamber respectively; the characteristics are:

[0006] A partition is vertically arranged in the middle of the common air chamber to divide the common air chamber and the primary air inlet into two mutually isolated left and right parts; each ventilation damper is equipped with a damper cover plate, and an electric actuator is provided to drive the damper cover plate through a transmission shaft, so that the primary air distribution ratio of the four ventilation dampers in the left air chamber and the four ventilation dampers in the right air chamber can be changed by adjusting the proportion of the damper cover plate covering the ventilation damper; so that the system has the ability to adjust the combustion conditions of different incineration sections of a single-row grate.

[0007] The transmission shaft is arranged horizontally and rotatably positioned on the two side walls of each wind chamber, one end of the transmission shaft is fixed to the damper cover, and the other end is driven by the electric actuator fixed to the outer wall of each wind chamber.

[0008] The actuator includes a reducer driven by a motor and a coupling installed between the reducer and the transmission shaft; the motor is connected to a remote control center through a control circuit, thereby realizing the remote control function of the motor.

[0009] The four ventilation dampers are of the same size and are all fan-shaped dampers; the axis of the transmission shaft is perpendicular to the wall of the common air chamber and passes through the arc center of the fan-shaped damper.

[0010] The damper cover plate is a fan-shaped cover plate, and the center of the fan-shaped arc coincides with the axis of the transmission shaft, so as to ensure the sealing when the damper cover plate covers the damper.

[0011] The beneficial effects of the utility model are:

[0012] After actual application, the utility model can transform the public wind chamber at the lowest cost, so that it has the ability to adjust the air flow of each wind chamber individually, meeting the current requirements of waste incineration power plants for refined control of incineration. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the main structure of an embodiment of the utility model (cross-sectional view).

[0014] Figure 2 for Figure 1 AA cross-sectional structure diagram in.

[0015] Figure 3 It is a schematic diagram of the main structure (cross-sectional view) of the wind chamber system of an existing two-stage reciprocating grate garbage incineration device.

[0016] Figure 4 for Figure 3 Schematic diagram of the BB cross-sectional structure.

[0017] Markings in the figure: left air chamber 1, common air chamber 2, right air chamber 3, ventilation damper 4, primary air inlet 5, electric actuator 6, partition 7, transmission shaft 8, damper cover 9. DETAILED DESCRIPTION

[0018] The following is a further description with reference to the embodiments shown in the accompanying drawings.

[0019] The air chamber system for a two-stage reciprocating grate waste incineration device shown in the attached drawings comprises a left air chamber 1, a right air chamber 3 and a common air chamber 2 arranged between the left and right air chambers; a primary air inlet 5 connected to a primary air main pipe is arranged at the lower part of the common air chamber, and four ventilation dampers 4 (by Figure 2 It can be seen that the ventilation dampers are all fan-shaped dampers); the above is similar to the structure of the wind chamber system of the existing two-stage reciprocating grate garbage incineration device.

[0020] The improvement of the utility model is that a vertically arranged partition plate 7 is added in the middle of the common air chamber to divide the common air chamber and the primary air inlet into two isolated left and right parts, wherein the common air chamber is divided into two left and right air chambers, and the lower parts of the two air chambers are respectively connected to the primary air inlet; each ventilation damper is equipped with a damper cover plate 9, and an electric actuator 6 that drives the damper cover plate through a transmission shaft 8 (the axis of the transmission shaft is perpendicular to the plane of the damper cover plate) is provided, so that the distribution ratio of the primary air entering the four ventilation dampers of the left air chamber or the right air chamber can be changed by adjusting the proportion of the damper cover plate covering the ventilation damper.

[0021] Preferably, the transmission shaft is arranged horizontally and rotatably positioned on the two side walls of each wind chamber, one end of the transmission shaft is fixed to the damper cover, and the other end extends to the outer wall of the wind chamber (the side facing away from the common wind chamber) and is driven by the electric actuator fixed to the outer wall of each wind chamber. The actuator (conventional mechanism) includes a reducer driven by a motor and a coupling installed between the reducer and the transmission shaft, and is fixed to the outer wall of each wind chamber through a support (the support is omitted in the figure).

[0022] Preferably, the axis of the drive shaft is perpendicular to the wall of the common air chamber and passes through the center of the arc of the fan-shaped damper; the damper cover is a fan-shaped cover, and the center of the fan-shaped arc coincides with the axis of the drive shaft; to ensure the sealing when the damper cover covers the damper.

[0023] Furthermore, an opening is provided on the outer wall of the wind chamber for the transmission shaft to pass through, and a flexible material (such as a sponge block) is fixed at the opening to block the gap (the gap between the transmission shaft and the edge of the opening) to maintain the sealing performance of the wind chamber.

[0024] Furthermore, the motor is connected to a remote control center through a remote control circuit, thereby realizing the remote control function of the motor. The remote control circuit includes a remote control unit, a signal acquisition unit and an execution unit. Obviously, the remote control circuit is also a prior art.

Claims

1. A wind chamber system suitable for a two-stage reciprocating grate garbage incineration device, comprising a left wind chamber (1), a right wind chamber (3) and a common wind chamber (2) arranged between the left wind chamber and the right wind chamber; a primary air inlet (5) is arranged at the lower part of the common wind chamber (2), and four ventilation dampers (4) connecting the left wind chamber and the right wind chamber are arranged on the left and right sides of the common wind chamber respectively; characterized in that: A partition plate (7) is vertically arranged in the middle of the common air chamber to divide the common air chamber and the primary air inlet into two mutually isolated left and right parts; each ventilation damper is equipped with a damper cover plate (9), and an electric actuator (6) is provided to drive the damper cover plate (9) through a transmission shaft (8), so that the primary air distribution ratio entering the four ventilation dampers in the left air chamber and the four ventilation dampers in the right air chamber can be changed by adjusting the proportion of the damper cover plate covering the ventilation damper.

2. The air chamber system for a two-stage reciprocating grate waste incineration device according to claim 1 is characterized in that: The transmission shaft is arranged horizontally and rotatably positioned on the two side walls of each wind chamber, one end of the transmission shaft is fixed to the damper cover, and the other end is driven by the electric actuator fixed to the outer wall of each wind chamber.

3. The air chamber system for a two-stage reciprocating grate waste incineration device according to claim 2 is characterized in that: The actuator includes a reducer driven by a motor and a coupling installed between the reducer and the transmission shaft; the motor is connected to a remote control center through a control circuit, thereby realizing the remote control function of the motor.

4. The air chamber system for a two-stage reciprocating grate waste incineration device according to claim 3 is characterized in that: The four ventilation dampers are of the same size and are all fan-shaped dampers; the axis of the transmission shaft is perpendicular to the wall of the common air chamber and coincides with the center of the arc passing through the fan-shaped dampers.

5. The air chamber system for a two-stage reciprocating grate waste incineration device according to claim 4 is characterized in that: The damper cover plate is a fan-shaped cover plate, and the center of the fan-shaped arc coincides with the axis of the transmission shaft, so as to ensure the sealing when the damper cover plate covers the damper.

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