WO2018161231A1

WO2018161231A1 - Piston support device for outlet of flue gas chamber of waste incineration power plant

Info

Publication number: WO2018161231A1
Application number: PCT/CN2017/075802
Authority: WO
Inventors: 马进; 钟日钢; 陈思杨; 焦堂财
Original assignee: 深圳市能源环保有限公司
Priority date: 2017-03-06
Filing date: 2017-03-06
Publication date: 2018-09-13

Abstract

A piston support device for an outlet of a flue gas chamber of waste incineration power plant, providing a tube-like support bushing seat (3) on a piston rod (1) of a piston, the support bushing seat (3) being capable of being opened or closed, the support bushing seat (3) being sleeved, after being opened, on the piston rod (1) and located between a top plate (2.3A) of a flue gas chamber (2) and a piston rod shoulder (1.2), the support bushing seat (3) holding the piston rod (1) upward by means of the shoulder (1.2) to prevent the piston rod (1) from falling down. The piston support device can prevent, in cases where there is a leak in a compressed air main pipe, a solenoid valve fails and a compressed air pipe at the tail portion of a cylinder lifting valve head is broken, the piston core rod from dropping and causing the accidental closure of the flue gas outlet, thereby not influencing the standard procedure of waste incineration.

Description

Flue gas storage chamber outlet piston support device for waste incineration power plant

Technical field

The invention relates to a waste incineration flue gas treatment device, in particular to a flue gas storage chamber outlet piston support device of a waste incineration power plant.

Background technique

At present, the waste incineration power plant uses a bag filter to remove dust from the flue gas. The flue gas from the incineration of the garbage enters the flue gas chamber from the flue gas inlet after passing through the bag filter, and then is discharged from the flue gas outlet. However, due to the high temperature of the outlet area during operation of the bag filter, the compressed air tube of the cylinder piston is prone to aging and damage under long-term high temperature conditions, and the piston valve is damaged due to damage of the solenoid valve or leakage of the compressed air main pipe. Keeping the spool in a raised state, the chamber outlet valve will fall due to the weight of the spool itself, causing the outlet door of the chamber to close, causing the flue gas to fail to pass through the bag filter, and even causing the main fuel to trip (MFT). It has a serious impact on the safe and stable operation of the entire power plant.

Summary of the invention

In view of the above drawbacks, the present invention provides a piston support device for a flue gas chamber outlet of a waste incineration power plant, and a tubular support sleeve is arranged on a piston rod of the piston, the support sleeve can be opened or covered, and the support sleeve is opened and then socketed. The piston rod is located between the top plate of the flue gas chamber and the shoulder of the piston rod, and the support sleeve supports the piston rod by the shaft shoulder to prevent the piston rod from falling, in order to prevent air leakage and electromagnetic in the compressed air main pipe. When the valve fails and the compressed air tube at the end of the cylinder lift valve head is damaged, the piston rod is lowered to the flue gas outlet and is accidentally closed, thereby affecting the normal operation of the garbage incineration.

The technical solution proposed by the present invention is to provide a flue gas chamber outlet piston supporting device for a waste incineration power plant, comprising a flue gas chamber and a piston, the piston being disposed at the top of the flue gas chamber, a piston rod is passed through the top plate of the flue gas chamber, a flue gas outlet is arranged on the lower bottom plate of the flue gas chamber, and an outlet cover plate is arranged at the flue gas outlet, and the outlet cover plate is driven by the piston rod to realize the smoke Opening or closing of the gas outlet, characterized in that a tubular support sleeve is arranged on the piston rod of the piston, and the support sleeve is formed by enclosing the first half tube and the second half tube, the support sleeve The support sleeve can be opened and then sleeved on the piston rod between the top plate of the flue gas chamber and the shoulder of the piston rod, and then wrapped and fixed, the first half tube and the second half After the tube is wrapped, a complete support tube is formed, which supports the piston rod up by the shoulder to prevent the piston rod from falling.

According to a preferred embodiment of the present invention, a hinge is disposed on the support sleeve, and the first half tube and the second half tube are connected by a hinge.

According to a preferred embodiment of the present invention, a buffer seat is further disposed on the upper side of the support sleeve.

According to a preferred embodiment of the invention, a support seat is further provided on the underside of the support sleeve.

According to a preferred embodiment of the present invention, a locking member is further disposed on the supporting sleeve, and the supporting sleeve is engaged and fixed by the locking member after being wrapped.

According to a preferred embodiment of the present invention, a strap is further disposed on the support sleeve, and the support sleeve is tightly fastened by the strap after being wrapped.

Advantageous Effects of the Invention: The present invention provides a piston support device for a flue gas chamber outlet of a waste incineration power plant, and a tubular support sleeve is arranged on a piston rod of the piston, which can effectively prevent the piston of the cylinder from falling due to a decrease in air pressure. The flue gas outlet was accidentally closed to ensure that the flue gas outlet can always be in a normally open state during operation to ensure safe and stable operation of the power plant.

BRIEF DESCRIPTION OF THE DRAWINGS:

1 to 3 are schematic views of the prior art mounting structure, wherein FIG. 2 and FIG. 3 are schematic diagrams of the internal structure, FIG. 2 is a schematic structural view when the flue gas outlet is opened, and FIG. 3 is a view of the flue gas outlet being lowered due to the lowering of the cylinder piston air pressure. Schematic diagram of the structure when it is accidentally closed.

4 is a schematic structural view of a first embodiment of the present invention. 4 is a schematic view of the installation structure, and FIG. 6, FIG. 7, and FIG. 8 are enlarged schematic views of the structure of the support sleeve. 7 and FIG. 8 are schematic structural views when the support sleeve is wrapped, FIG. 7 is a schematic structural view after the rotation of FIG. 6 is rotated by 180 degrees, and FIG. 8 is a schematic structural view when the support sleeve is opened.

Figure 9 is an enlarged schematic view showing the structure of a second embodiment of the present invention.

In the picture,

1 piston rod, 1.1 outlet cover, 1.2 shoulder;

2. Flue gas chamber, 2.1 flue gas inlet, 2.2 flue gas outlet, 2.3A flue gas chamber top plate, 2.3B flue gas chamber lower floor, 2.4 flue gas chamber chamber;

3 sets, 3A left set, 3B right set, 3.1 locking part, 3.2 hinge (leaf), 3.3 buffer seat, 3.3A left cushion, 3.3B right cushion, 3.4 support, 3.4A left support Seat, 3.4B right support, 3.5 sets of holes;

4 drawstrings.

detailed description

1 to 3 are schematic views of the prior art mounting structure, wherein FIG. 2 and FIG. 3 are schematic diagrams of the internal structure, FIG. 2 is a schematic structural view when the flue gas outlet is opened, and FIG. 3 is a view of the flue gas outlet being lowered due to the lowering of the cylinder piston air pressure. Schematic diagram of the structure when it is accidentally closed. It can be seen from the figure that the waste incineration power plant uses a bag filter to remove dust from the flue gas. The flue gas from the incineration of the garbage enters the flue gas chamber 2 from the flue gas inlet 2.1 after passing through the bag filter, and then exits from the flue gas bin 2.2. discharge. In the prior art, the flue gas chamber outlet of the waste incineration power plant is controlled to be opened or closed by a piston, and the structure thereof comprises a flue gas chamber 2 and a piston, the piston is arranged at the top of the flue gas chamber 2, and the piston rod 1 is from the flue gas chamber. The upper top plate 2.2A passes through, the flue gas outlet 2.2 is disposed in the lower bottom plate 2.3B of the flue gas chamber 2, and the outlet cover plate 1.1 is disposed at the flue gas outlet 2.2. The outlet cover plate 1.1 is driven by the piston rod 1 on the piston rod 1 The flue gas outlet 2.2 will open or close when moving down.

Figure 2 shows that under normal conditions, the piston rod 1 is kept in a raised state, and the flue gas outlet 2.1 is kept open, so that the flue gas can pass through the bag filter to enter the flue gas inlet 2.1 and then be discharged from the flue gas outlet 2.2 to ensure waste incineration. Going smoothly.

The problem is, as shown in Figure 3, in the daily operation, because the temperature of the outlet door valve body is higher when the bag filter is running, the compressed air pipe used in the tail of the cylinder lift valve head is made of plastic material, and the compressed air pipe is in high temperature for a long time. The work is prone to aging and damage, and the solenoid valve is damaged or the compressed air main pipe leaks, etc., causing the air pressure in the cylinder to be low, and the piston rod 1 cannot be kept in a raised state, and the valve core and the piston rod are self-contained. The weight loss and other reasons cause the flue gas outlet 2.1 to be closed, causing the flue gas to fail to pass through the bag filter. In severe cases, even the main fuel trips (referred to as MFT, the main fuel trip is the core content of the boiler safety protection. After the boiler MFT action, First, the secondary air system, the feed grate is completely stopped; the turbine trips), which has a serious impact on the safe and stable operation of the entire power plant.

4 to 8 are schematic views showing the structure of the first embodiment of the present invention. 4 is a schematic view of the installation structure, and FIG. 6, FIG. 7, and FIG. 8 are enlarged schematic views of the structure of the support sleeve. 7 and FIG. 8 are schematic structural views when the support sleeve is wrapped, FIG. 7 is a schematic structural view after the rotation of FIG. 6 is rotated by 180 degrees, and FIG. 8 is a schematic structural view when the support sleeve is opened.

The figure shows, in this example, a flue gas chamber outlet piston support device for a waste incineration power plant, comprising a flue gas chamber 2 and a piston, the piston being arranged at the top of the flue gas chamber 2, and the piston rod 1 from the flue gas chamber The upper top plate 2.2A passes through, the flue gas outlet 2.2 is disposed in the lower bottom plate 2.3B of the flue gas chamber 2, and the outlet cover plate 1.1 is disposed at the flue gas outlet 2.2. The outlet cover plate 1.1 is driven by the piston rod 1 on the piston rod 1 The flue gas outlet 2.2 will open or close when moving down. Different from the prior art, in this example, a tubular support sleeve 3 is provided on the piston rod 1 of the piston, and the support sleeve 3 is formed by the first half tube 3A and the second half tube 3B, the first half After the tube 3A and the second half tube 3B are wrapped, the tube hole 3.5 is formed, the support sleeve 3 can be opened or wrapped, and the first half tube 3A and the second half tube 3B are wrapped to form a complete support tube 3, supporting After the sleeve 3 is opened, it is sleeved on the piston rod 1 between the top plate 2.3A of the flue gas chamber and the shoulder 1.2 of the piston rod 1. The support sleeve 3 supports the piston rod 1, and the support sleeve 3 passes The shoulder 1.2 lifts the piston rod 1 up to prevent the piston rod from falling.

Fig. 7 shows that, in this example, the support sleeve 3 is further provided with a hinge 3.2, and the first half tube 3A and the second half tube 3B are connected by a hinge 3.2 and are opened or covered.

5, 6, and 7, in this example, a buffer seat 3.3 is further disposed on the upper side of the support sleeve 3, and the buffer seat is formed by a combination of a left buffer seat 3.3A and a right buffer seat 3.3B. The cushion seat 3.3 can be made of a colloidal rebound material, and the cushion seat 3.3 acts as a buffer when it contacts the shoulder 1.2. The present invention suggests that the cushioning seat should be made of a heat resistant material.

5, 6, and 7, in this example, a support base 3.4 is further disposed on the lower side of the support sleeve 3, and the support base 3.4 is formed by a combination of a left support base 3.4A and a right support base 3.4B. The support seat 3.4 increases the area of force between the support sleeve 3 and the top plate 2.3A on the flue gas chamber.

5, 6, and 7, in this example, a locking member 3.1 is further disposed on the supporting sleeve 3, and the supporting sleeve 3 is engaged and fixed by the locking member 3.1.

The figure shows that since the support sleeve 3 is provided on the piston rod, the flue gas outlet 2.2 is always in a forced open state. Even if the compressed air pipe works for a long time under high temperature conditions, it is easy to age and break the air leakage, which can effectively avoid the problem that the flue gas outlet is accidentally closed due to the falling of the piston rod, and ensure the safety of operation. In the daily operation, the support sleeve 3 is fastened by the locking member 3.1 after being wrapped, thereby preventing the piston rod 1 from falling. When the shutdown is required to close the flue gas outlet, the locking member 3.1 of the support sleeve 3 can be opened, and the support sleeve 3 can be removed, so that the equipment can be inspected.

Figure 9 is an enlarged schematic view showing the structure of a second embodiment of the present invention. The figure shows that, unlike the first embodiment of the present invention, the band 4 replaces the locking member 3.1 in this example. In the daily operation, the support sleeve 3 is wrapped and fastened by the strap 4 after being wrapped. When the shutdown is required to close the flue gas outlet, the strap 4 can be cut and the support sleeve 3 can be removed, so that the equipment can be inspected. The present invention suggests that The strap should be made of a heat resistant material.

Claims

A flue gas chamber outlet piston support device for a waste incineration power plant, comprising a flue gas chamber and a piston, the piston being disposed at a top of the flue gas chamber, the piston rod passing through a top plate of the flue gas chamber Providing a flue gas outlet at a lower bottom plate of the flue gas chamber, and an outlet cover plate at the flue gas outlet, the outlet cover plate being driven by a piston rod to open or close the flue gas outlet, wherein a tubular support sleeve is disposed on the piston rod of the piston, the support sleeve is formed by enclosing the first half tube and the second half tube, the support sleeve can be opened or wrapped, and the support sleeve is opened The rear sleeve is disposed on the piston rod between the top plate of the flue gas chamber and the shoulder of the piston rod and then wrapped and fixed, and the first half tube and the second half tube are combined to form a complete support tube. The support sleeve holds the piston rod up by the shoulder to prevent the piston rod from falling.
The flue gas chamber outlet piston supporting device of a waste incineration power plant according to claim 1, wherein a hinge is arranged on the support sleeve, and the first half tube and the second half tube are both The connection is made by hinges.
The flue gas chamber outlet piston support device of a waste incineration power plant according to claim 1, wherein a buffer seat is further disposed on an upper side of the support sleeve.
The flue gas chamber outlet piston support device of a waste incineration power plant according to claim 1, wherein a support seat is further disposed on a lower side of the support sleeve.
The flue gas chamber outlet piston support device of a waste incineration power plant according to claim 1, wherein a lock member is further disposed on the support sleeve, and the support sleeve is wrapped by the The locking member is fastened and fastened.
The flue gas chamber outlet piston support device of a waste incineration power plant according to claim 1, wherein a belt is further disposed on the support sleeve, and the support sleeve is covered by the The strap is tightly fastened.