JPS6144213A - Soot blowing device for heat exchanger - Google Patents

Abstract

PURPOSE:To enable blowing of soot throughout a wide range through the working of the reduced number of soot blowing devices, by a method wherein injecting devices are arranged in 2 systems, and a moving plate can be freely driven by a single driving device by intercoupling the ends of 2 system lancet tubes by means of the single moving plate. CONSTITUTION:A number of injection nozzles 13 are bored, and plural injection medium injecting pipes 11, intercoupled through a coupling pipe 12, are disposed. A lancet tube 3, connected to an injection medium feed pipe 2 of a flexible hose, on which an injection medium feed valve 1, adapted to feed an injection medium from an injection medium source located outside a furnace wall 18, is located, is coupled to an injection pipe 11. A system A injecting device 17, formed such that movement guide rollers 16 at both ends of the injection pipe 11 are supported on guide tracks 15 to enable parallel movement of the injection pipe, and a system B injecting device 19, constituted in a similar manner described above, are located in juxtaposition with each other. The ends of the lancet tubes 3 of the system injecting devices are intercoupled through a single moving plate 4, and the 2 systems injecting devices are adapted to be capable of simultaneously reciprocating along with forward and reverse rotation of a driving gear 23 in a gear box.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a soot blowing device for a heat exchanger.

BACKGROUND OF THE INVENTION A conventional example of a soot blowing device for a heat exchanger is a soot blowing device called a stationary translation type, as shown in FIGS. 3 and 4. That is, a heat exchanger 015 is disposed between the furnace walls 018, and an injection medium flow valve 01 is installed outside the furnace wall to connect the injection medium supply pipe 0.
2, the supply pipe has a plurality of injection medium injection pipes 012 perforated with a large number of injection nozzles 014 installed below the heat exchanger in the furnace wall, and interconnected with a connecting pipe 013. At the same time, a movable plate 04 is fixed to the base of the lance tube and supported by a movable roller 011, and the furnace wall 018 side of the lance tube is supported by a support roller. 010 to make the lance tube movable, and both ends of the drive mirror 08 wound around fixed chain wheels 019 and 020 are fixed to both sides of the movable plate, respectively. Another chain wheel 021 coaxial with the fixed chain wheel 020 and the drive chain wheel 0 of the gear box 06 which is connected to the drive source 05
Another driving mirror 07 is wound between the lance tubes 22 and the lance tube and the driving mirror are housed in the lance tube casing 09, and the driving source and gear box are fixedly mounted on the upper part of the casing. Furthermore, movable guide rollers 017 are protruded from both ends of the injection medium injection pipe, and the guide rollers are supported on a guide track 016.

Therefore, in the conventional soot blowing device described above, the lance pipe 03 reciprocates between the front and (B) points in accordance with the forward and reverse rotation of the drive chain wheel 022 of the gear box 06, and therefore the injection on the lance pipe side The injection pipe 012 can be moved back and forth between points (G) and (G) by separating the pipe old 2 between points C) and (2) from the lance pipe, respectively, so that the injection medium supply pipe By moving the injection pipe in parallel and reciprocating while sending the injection medium to 02, the injection medium is injected from the old injection nozzle 4, and the heat exchanger 015 can be evenly blown with soot.

However, according to the conventional soot blower described above, in order to inject the injection medium during the reciprocation of the injection medium injection pipe 012, a large amount of the medium is required, and the injection medium of the injection medium flow valve 01 and the supply pipe 02 is There is a limit to the total nozzle area commensurate with the medium passing capacity, that is, the nozzle diameter x number of nozzles, and the soot blowing range of the heat exchanger 015 is narrow, so it is necessary to compensate by increasing the number of soot blowing devices. There are drawbacks such as:

Problems to be Solved by the Invention This invention reduces the amount of injection medium required for blowing soot from a heat exchanger, and makes it possible to blow soot over a wide area with a small number of soot blowing devices. It is something.

Means for Solving the Problems This invention disposes an injection medium injection pipe below the heat exchanger, connects a lance pipe to the injection pipe to supply the injection medium in a controllable manner, and provides parallel reciprocating motion. Two freely configured injection devices are arranged in rows, the ends of the two series lance tubes are connected by a single moving plate, and the moving plate is freely driven by a single drive device. .

Effect: Therefore, according to the configuration of the present invention, each series of injection devices performs reciprocating motion simultaneously by one drive device, but if there is no restriction on the injection medium source, it is possible to inject two series at the same time. In that case, it can be controlled to inject both during the reciprocating movement, only during the forward movement, or only during the backward movement, and if there is a limit to the capacity of the medium source, one series It is possible to freely control the injection so that one train can be injected during forward movement, and the other train can be injected during backward movement.

Embodiments Next, embodiments of the present invention will be explained with reference to the drawings.
In FIGS. 1 and 2, a heat exchanger 14 is disposed between the furnace walls 18, and below the heat exchanger there are a number of injection nozzles.
A plurality of injection medium injection pipes 11 are provided, each of which has holes 3 and are connected to each other through a connecting pipe 12, and the injection medium can be freely controlled from an injection medium source installed outside the furnace wall 18. A lance pipe 3 connecting an injection medium supply pipe 2 made of a flexible hose with an injection medium flow valve 1 interposed therebetween is connected to the lance pipe 3, and furthermore, movement guide rollers 16 at both ends of the injection pipe are guided. The two series injection devices of the A series injection device 17 supported on the track 15 and configured to be freely movable in parallel and the B series injection device 19 configured in exactly the same manner are arranged side by side, and then the two series injection devices of the The ends of the lance tubes 3 are connected by a single moving plate 4, and a moving roller 9 is protruded from the moving plate and is rotatably supported at the lower part of the lance tube drive casing 10, and is disposed within the drive casing. The drive unit 8 is wound around the fixed chain wheels 20 and 21 installed.
0 and both ends are fixed respectively, and another drive unit 7 is wound between the other chain wheel 22 coaxial with the fixed chain wheel 20 and the drive chain wheel 23 of the gear box 6 which is connected to the drive source 5. Therefore, the dual-line injection device can simultaneously reciprocate according to the forward and reverse rotations of the drive gear 23 of the gear box, and at this time, the supply pipe 2 connected to the lance pipe 3 is formed of a flexible hose. Therefore, the movement of the dual-line injection device will not be hindered.

Effects of the Invention As described above, in this invention, the two-line injection device can be moved in parallel simultaneously by one reciprocating drive device, so the number of drive devices can be halved, and since the two-line injection device can reciprocate at the same time, In addition to the widespread use of soot blowing for heat exchangers, it is possible to use injection media in appropriate amounts even when there is no limit to the capacity of the injection medium source or in cases where there is a restriction. The economic benefits of this invention are significant, since initial equipment costs and operating costs can be reduced.

[Brief explanation of drawings]

Fig. 1 is a side view with main parts cut away showing an embodiment of the present invention, Fig. 2 is a view taken along the line X-X in the previous figure, and Fig. 3 shows a soot of a conventional heat exchanger. FIG. 4, which is a side view showing the main parts of the blowing device cut away, is a view taken along the Y-X arrow in the previous figure. 1. Injection medium flow valve that supplies injection medium in a controllable manner;
2. Injection medium supply pipe consisting of a flexible hose, 3. Lance pipe, 4. One moving plate, 10. Lance pipe drive casing, 11. Injection medium injection pipe, 12. Connection pipe, 1
3. Injection nozzle, 14. Heat exchanger, 17. A series injection device, ] 8. Furnace wall, 19. B series injection device. N ~ C + i + 〒 + r − X i profit r. ! L. ×

Claims (1)

[Claims] Multiple lance tubes are fixed to a movable plate that moves while being supported by a casing, and the movable plate is connected to one
A soot blowing device for a heat exchanger, which is driven by a drive device and is provided with means for independently controlling the supply of injection medium to each lance tube.