JPS5899610A - Soot blower of parallel movement type - Google Patents

Abstract

PURPOSE:To eliminate restriction of a soot blower for its installation location, by connecting an injection pipe to a soot-blowing medium feed pipe by a swivel joint, and by moving the injection pipe along the inside of a duct, in the titled soot blower. CONSTITUTION:A feeding source of soot blowing medium is connected to a soot- blowing medium feed pipe 11. The soot blowing medium is fed into an injection pipe 2, by opening a valve for the feeding source of soot blowing medium. The valve is opened and closed by a limit switch 23, which drives a motor 20 at the same time, and the injection pipe 2, being pulled by a chain 13, is moved, with soot blowing medium being injected. The injection pipe 2 is moved in parallel, by the interlocking of a pinion 15 with a rack 14 and the co-axial revolution of a sprocket 16. With such an arrangement, the titled soot blower can be installed to any necessary part of a heat exchanger, because there exists no part projected to the outside of a duct, and the installing location of a soot blower is not at all restricted.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a soot blower), 4I, eliminating the extension of the soot blower device to the outside of the duct, eliminating constraints on the device space and reducing the amount of soot blowing medium; The soot blower, which is designed to save energy in the supply source of the soot blowing medium, removes dust adhering to the surface of the heat exchanger tube by the ejection force or thermal shock of the soot blowing medium, maintaining heat exchange efficiency. The soot blower device may be installed at the necessary location of the soot blower, depending on the type of heat exchanger, depending on the type of heat exchanger. It can be difficult to

In addition, even if installed, it may be difficult to operate, so the soot blower system of the 111! It is a differential type soot blower, on which a long guide rail IKJI#Ib device 3 is suspended, and is a trap for inserting and removing two injection pipes. The length of insertion and removal of this injection pipe,
It is equal to the width of the heat exchanger 110, and therefore protrudes to the outside of the heat exchanger somewhat longer than the width of the heat exchanger manufactured by Guide Rail 1.

Therefore, the installation of the long-slot type soot blower has the disadvantage that it is limited to a location where the overhanging tube of the guide rail can be tolerated, and is subject to restrictions on the installation location. The soot blower shown in FIG. 2 is a metering rotation type soot blower. In other words, the soot blowing medium supplied from the arrow A is injected from a number of nozzles 7 provided in the injection pipe 2. The injection pipe 2 is rotated by a sprocket 4 which is rotated by the operation of a chain 50, and by a wheel 6 that is meshed with the sprocket 4.

This stationary rotating soot blower requires a large number of nozzles instead of the ejection pipes 2 protruding outward from the heat exchanger unlike the long slide type soot blower.

In addition, in the case of a mobile type such as the long pull-out type soot blower, it is possible to perform a wide range of soups, so in the case of a fixed & rotating type, it is better to use one soot blower. There is a need.

As a result, is this coupled with the need for a large number of soot blowers? Since a large number of injection nozzles must be installed, a large number of soot-blowing medium pipes are required, and for example, when the soot-blowing medium is steam, the steam consumption increases, and when the soot-blowing medium is steam, the compressor capacity increases. However, there were problems in terms of energy saving.
The present invention aims to provide a soot blower that simultaneously solves the drawbacks of the long slide type soot blower and the problems of the stationary rotation type soot blower. The injection pipe is connected to the medium supply pipe via a swivel joint so that the injection pipe can move within the duct.A pinion is rotatably attached to both ends of the injection pipe, and the rack duct that engages with the pinion is P'3 Mount it on the wall and attach a chain to the end of the injection pipe! ! Next, the end of the injection pipe is formed into an entrestean, and the sprocket is placed on the outer side of the chain t duct, and by coaxially rotating this sprocket, the injection pipe t
A feature is that the needle is moved in parallel within the duct.

The details will be explained below with reference to the embodiment shown in the drawings. Third
In Fig. 4 (plan view) and Fig. 4 (Confucian drawing), reference numeral 2 indicates an injection pipe equipped with a large number of O injection nozzles yt-, a soot-blowing medium supply pipe 8, 9, 10° 11 and a swivel joint 12. They are extendably connected through the connector. Also, both ends KU of the injection pipe 2
A binion 15 is rotatably provided, and this binion 15
It is designed to mesh with a rack 14 mounted on the inner wall of the duct 21. 13 is Che 7, and the injection pipe 20
m of the injection pipe 2.
It is an entrestean including the outer part of the duct and a chain sprocket 1.
The stake has been passed on 6th. The sprocket 16 is attached to a shaft 17 and rotated once synchronously by a prime mover 20 via pulleys 1B and 19t. The injection pipe 2 is arranged at a certain distance from the heat transfer l522 in relation to the soot blowing medium injected from the injection nozzle T. Note that 24 and 25 are limit switches.

Next, the operation of this embodiment configured as described above will be explained.

A soot blowing medium supply source (not shown) is connected to the soot blowing medium supply pipe 11 . By opening the valve of this soot-blowing medium supply source, the soot-blowing medium is supplied to the injection pipe 2. When this valve is opened and closed using the limit switch 24, the KJ
[Movement 41!2G is driven, the injection pipe 2t is pulled by the chain 13, and the soot blowing medium pipe is ejected while moving.

During this movement, the mesh between the rack 14 and the pinion 15 and the coaxial rotation of the sprocket 16 cause the injection pipe 2 to move parallel to the injection pipe 2. In this way, when the injection pipe 2 moves and contacts the switch 25, ,
The original one rotates backwards to 20 and moves to the original direction to the injection pipe 2. When the injection pipe 2 that has moved in the original direction comes into contact with the limit switch 24, it is stopped by the prime mover 20, the valve of the soot blowing medium supply source is closed, and -times O soot pro 5' is completed. .

The parallel movement type soup stock g7 of the present invention described in detail above is as follows:
Since the injection pipe and the soot blowing medium supply pipe are connected with a swivel joint and the injection pipes are moved within the duct, there is no protrusion to the outside of the duct, and there are no restrictions on the installation location. , the heat exchanger can be installed at any required location. In addition, since the injection tube is movable, it is possible to cover a wide range of soot products with one injection tube, reducing wasteful consumption of G1 soft media and reducing the energy required to supply it. It has an excellent effect of saving money.

In addition, by installing racks, binions, and chain drives, the parallel movement of the injection pipe is more reliable, which reduces failures, and remote or fully automatic operation is easy, making it possible to eliminate the protrusion to the outside of the duct. Coupled with the fact that it has been removed, there are excellent effects such as improved operability and the elimination of previous problems regarding the installation location.

[Brief explanation of the drawing]

Figures 1 and 2 are representative examples of conventional soot blowers, respectively. Figure 1 is a long slide type soot blower, Wl, Figure 2 is a side view showing an outline of a stationary rotating type soot blower, and Figures 3 and 2 are representative examples of conventional soot blowers. FIG. 4 shows an embodiment of the parallel moving soot blower of the present invention, and FIG. 3 is a plan view, and FIG. 4 is a side view. 2... Injection pipe 7... Injection nozzle 8.9゜1
0.11... Soot blowing medium supply pipe 12... Swivel joint 13... Che 7 14... Rack
15...Pinion 16...Temp.) 17...Shaft 20...Motor applicant Kawasaki Heavy Industries, Ltd.

Claims (1)

[Claims] In a soot blower device 1 having a heat transfer section having a large number of heat transfer tubes arranged in a duct circle, an injection tube having a large number of injection nozzles 1 is located at a distance from the heat transfer section. It is telescopically connected to the soot-blowing medium supply pipe through a swivel joint, rotatably provided at both ends of the injection pipe, and mounted on the inner wall of the rack pipe duct that engages with the soot-blowing medium supply pipe. Attach chains to both ends of the injection pipe to form an entrestean including both ends of the ejection pipe, and pass the chain spooket provided outside the entire duct of the entresteen to form a coaxial sprocket. A parallel displacement type soot blower in which the injection pipe is moved in parallel by rotation between the rack and the pinion.