WO2020029042A1

WO2020029042A1 - Soot cleaning device for fire tube type heat recovery boiler

Info

Publication number: WO2020029042A1
Application number: PCT/CN2018/099055
Authority: WO
Inventors: 刘祥斌
Original assignee: 江苏东九重工股份有限公司
Priority date: 2018-08-06
Filing date: 2018-08-06
Publication date: 2020-02-13

Abstract

Provided is a boiler soot cleaning apparatus with a quick opening and good sealing performance. The soot cleaning apparatus is mounted exactly opposite a rear tube plate of a fire tube type heat recovery boiler on an outlet flue plate, and comprises a soot cleaning channel tube (1), one end of the soot cleaning channel tube (1) being mounted on the outlet flue plate and a tube opening at the other end thereof being internally provided with a groove-shaped block (3), wherein a U-shaped baffle (2) is provided on the side, away from the tube opening, of the groove-shaped block (3), and a cover plate (5) matching the groove-shaped block (3) and freely tightening and opening the groove-shaped block (3) by using a threaded rod pin (7) is provided outside the tube opening correspondingly; a high temperature resistance spacer (4) is positioned between the cover plate (5) and the tube opening; and a handle (6) is provided on the side, away from the tube opening, of the cover plate (5). The soot cleaning apparatus further comprises a soot cleaning rod (8), the soot cleaning rod (8) being made of long circular steel and provided with a soot cleaning rod handle at a tail end and a wire brush at a top end.

Description

Ash cleaning device for fire tube type waste heat boiler

Technical field

The invention belongs to a boiler ash cleaning equipment which is quickly opened and has good sealing performance, and is mainly applicable to a ash removal system of a fire tube type waste heat boiler.

Background technique

Existing technology: The ash removal in the fire tube type waste heat recovery boiler system is an important link to ensure long-term efficient and safe operation of the boiler, and the fire tube type waste heat boiler flue gas goes through the tube. At present, the following problems often exist in actual operation:

1. As the various flue gases entering the fire-tube type waste heat boiler are high-temperature exhaust gas, which often contain a small amount of molten state cohesive dust or other types of dust, it is easy to deposit and block on the inner wall of the heat exchange tube, causing the boiler heat transfer to deteriorate. Even tube burst accidents.

2. The heat exchange tubes are densely packed in the cylinder, and the high-temperature flue gas flows in the heat exchange tubes. The heat exchange tubes are small-diameter seamless tubes. Once the ash accumulation in the tubes is severe, the furnace must be stopped. After the boiler cools down, it is manually entered into the furnace for cleaning. Ash, causing users to lose parking.

3. All horizontally arranged fire-tube waste heat boilers cannot be cleaned mechanically during operation.

Summary of the invention

The present invention addresses the above-mentioned problems, and proposes a fire tube type waste heat boiler ash cleaning device installed outside the boiler and manually ashing the boiler heat exchange tubes in time without stopping.

The technical solution proposed by the present invention to solve the above technical problems is: a fire tube type waste heat boiler ash cleaning device, which is installed on the back of the fire tube type waste heat boiler and the tube plates are directly opposite each other, and the outlet flue plate includes the ash cleaning channel tube. One end of the ash cleaning passage pipe is installed on the outlet flue plate, and the other end of the pipe is provided with a groove-shaped stopper, and a U-shaped baffle is provided between the groove-shaped stopper and the inside of the cover plate, and the corresponding pipe mouth is provided outside. There is a cover plate that is matched with the groove stopper to freely tighten and open the cover plate of the groove stopper. A high-temperature-resistant gasket is placed between the cover plate and the nozzle. The handle also includes a dust cleaning rod, which is made of long round steel, a dust cleaning rod handle is provided at the rear end, and a wire brush is provided at the top. The steel wire brush is a stainless steel wire brush, and the ash cleaning channel pipe is a round-diameter steel pipe of Φ108mm or more.

Compared with the prior art, a fire tube type waste heat boiler ash cleaning device of the present invention has the following beneficial effects: Since the tube plates of the fire tube type waste heat boiler are directly opposite each other, the outlet flue plate (outside of the furnace) is arranged with the tubes. The number of holes on the board is consistent with the number and position of the round diameter steel pipe with a certain length of Φ108 or more. A groove-shaped stopper is installed in the pipe. The M16 screw pin is used to tighten and open the groove-shaped stopper. The high temperature resistant gasket is placed between the cover plate of the block, the cover plate and the nozzle, which acts as a seal when the screw pin is tightened. After the screw pin is loosened, the cover plate is freely removed, and the steel pipe is used as a dust cleaning channel. When the boiler needs to be cleaned, you can quickly remove the stainless steel cleaning rod (about 20 round steel, with a stainless steel wire brush at the top) for the cover, and go deep into the ash cleaning channel. The wire brush goes directly to the inside of the heat exchange tube and pushes the ash brush down. Until the ash drop port is free to fall, cover the cover after the ash cleaning is completed, and the screw pin can be tightened. The ash cleaning process adopts the method of single opening, single closing and one by one operation, which does not affect the normal operation of the boiler. Quick opening and closing, simple and convenient operation, and sealability; the ash cleaning channel is set at the end of the boiler, and one by one operation, the boiler can be cleaned without stopping, which reduces the economic loss caused by the shutdown of the furnace; solves the horizontal fire tube Type waste heat boilers must be shut down to remove dust.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of an ash cleaning channel according to the present invention;

Fig. 2 is a cleaning rod of the present invention.

In the figure: 1 is the dust cleaning channel tube, 2 is a U-shaped baffle, 3 is a groove-shaped stop, 4 is a high-temperature sealing gasket, 5 is a cover plate, 6 is a handle, 7 is a screw pin, and 8 is a dust cleaning rod. .

detailed description

The drawings disclose, without limitation, a schematic structural diagram of a preferred embodiment of the present invention. The technical solution of the present invention will be described in detail below with reference to the drawings.

Implementation case:

A fire tube type waste heat boiler ash cleaning device of this embodiment is shown in Fig. 1. It is installed on the rear tube plate of the fire tube type waste heat boiler directly opposite to the exit flue plate (outside of the furnace), including the ash cleaning channel tube. One end of the ash passage pipe is installed on the outlet flue plate, and the other end of the pipe is provided with a groove block, a U-shaped baffle is provided between the groove block and the inside of the cover plate, and a corresponding groove is provided outside the corresponding pipe mouth. The cover of the stopper is tightened freely with a screw pin to open the cover of the grooved stopper. A high temperature resistant gasket is placed between the cover and the nozzle, and a handle is provided on the side facing away from the cover and the nozzle; it also includes dust removal. The rod and the dust cleaning rod are made of long round steel. The tail end is provided with a dust cleaning rod handle and the top is provided with a wire brush. The wire brush is a stainless steel wire brush. The ash cleaning channel pipe is a round diameter steel pipe of Φ108mm or more. The screw pins are M16 screw pins. In use, the screw pin in Figure 1 tightens and relaxes the grooved stop in the cleaning channel tube freely through its freely moving pin, the thread on the cover and the U-shaped baffle. Remove and cover the cover by the handle. When removing the dust, remove the cover and push the dust cleaning rod into the dust cleaning channel in Figure 2. The steel wire brush goes directly to the inside of the heat exchange tube and pushes the dust brush down to the dust drop port to drop freely. After the dust is cleaned, cover the cover and screw the pin. It can be tightened, and the ash cleaning process adopts the method of single operation and single operation.

As can be seen from the above, in this embodiment, since the tube plates of the fire tube type waste heat boiler are directly opposite each other, the exit flue plate (outside of the furnace) is arranged with a circle of a certain length of Φ 108 or more in accordance with the number and position of the holes on the tube plate. Diameter steel pipe, equipped with grooved stoppers in the tube, and a matching cover with a M16 screw pin to freely tighten and open the grooved stopper is installed outside the tube. A high temperature resistant gasket is placed between the cover and the mouth of the tube. When the screw pin is tightened, it acts as a seal. After the screw pin is loosened, the cover plate is freely removed, and the steel pipe is used as a dust cleaning channel. When the boiler needs to be cleaned, you can quickly remove the stainless steel cleaning rod (about 20 round steel, with a stainless steel wire brush at the top) for the cover, and go deep into the ash cleaning channel. The wire brush goes directly to the inside of the heat exchange tube and pushes the ash brush down. Until the ash drop port is free to fall, cover the cover after the ash cleaning is completed, and the screw pin can be tightened. The ash cleaning process adopts the method of single opening, single closing and one by one operation, which does not affect the normal operation of the boiler. Quick opening and closing, simple and convenient operation, and sealability; the ash cleaning channel is set at the end of the boiler, and one by one operation, the boiler can be cleaned without stopping, which reduces the economic loss caused by the shutdown of the furnace; solves the horizontal fire tube Type waste heat boilers must be shut down to remove dust.

The preferred embodiments of the present invention described above with reference to the accompanying drawings are only used to illustrate the embodiments of the present invention, rather than as a limitation on the foregoing inventive objectives and the content and scope of the appended claims. Any simple modifications, equivalent changes and modifications made by the embodiments still belong to the technical and right protection scope of the present invention.

Claims

A fire tube type waste heat boiler ash cleaning device is installed on the back of the fire tube type waste heat boiler, the tube plates are opposite to each other, and the outlet flue plate is characterized in that it includes a ash cleaning channel tube, and one end of the ash cleaning channel tube is installed in the outlet flue. A groove-shaped stopper is provided in the other end of the plate, and a U-shaped baffle is provided between the groove-shaped stopper and the inner side of the cover plate, and a screw pin supporting the groove-shaped stopper is provided outside the corresponding nozzle to freely close it. Tighten and open the cover plate of the groove-shaped stopper. A high temperature resistant gasket is placed between the cover plate and the nozzle. A handle is provided on the side facing away from the cover plate and the nozzle. It also includes a cleaning rod, which is made of long round steel. , The tail end is provided with a dust cleaning lever handle, and the top end is provided with a wire brush.
The ash cleaning device for a waste heat boiler according to claim 1, wherein the wire brush is a stainless steel wire brush.
The ash cleaning device for a fire-tube type waste heat boiler according to claim 2, characterized in that the ash cleaning channel pipe is a round-diameter steel pipe having a diameter of Φ 108 mm or more.