JPS6113054Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a device for removing soot and sulfur dioxide gas from combustion gas.The purpose of the invention is to provide an apparatus that can be easily maintained.One embodiment of the invention will be described below based on the drawings. do.

Reference numeral 1 denotes an outer cylinder partitioned into three chambers in the vertical direction by upper and lower partition plates 2 and 3, and a bench lily 4 is provided approximately concentrically with this outer cylinder 1. There are 4 bench lilies. The upper end of bench lily 4 is
It protrudes above the outer cylinder top plate 1A, and a connecting pipe 5 is provided on its peripheral wall to form a combustion gas inlet portion 6, and a spray nozzle 7 is provided in the connecting pipe 5.
This spray nozzle 7 opens downward at a combustion gas inlet 6 on the bench lily axis 4a. A liquid reservoir 9 having a conical bottom plate 9A is provided in the lower compartment 8 of the outer cylinder 1. The lower end of the bench lily 4 is inserted into this liquid reservoir 9, and the liquid reservoir 9 is connected to the gas of the bench lily 4. It is made to face the discharge end part 10. The middle compartment 11 of the outer cylinder 1 is divided into two upper and lower compartments by an intermediate partition plate 12.
Each compartment 13, 14 is provided with a spiral strip plate 15, 16 to form a spiral passage 17, 18. Through holes 19 and 20 are formed along the outer peripheries of the lower partition plate 3 and the intermediate partition plate 12, and these through holes 1
The starting portions 17A, 18A of the spiral passages 17, 18 are communicated with the lower compartment 8 by means of 9, 20. A plurality of impingement type spray nozzles 22, 23 are provided in the outermost passages 17B, 18B following the spiral passage starting parts 17A, 18A. The collision type spray nozzle 22 includes a pair of spray nozzles 22A, 22
B are provided to face each other in the horizontal direction, and can spray fine droplets (the same applies to the collision type spray nozzle 23). A gas-liquid separation chamber 25 is formed in the upper compartment 24 of the outer cylinder 1 so as to surround the bench lily 4. That is, the gas-liquid separation chamber 25 has a cylindrical wall 27 having a large number of slits 26 in the circumferential direction, which is connected to the outer cylinder top plate 1A and the upper partition plate 2.
A through hole 21 formed in the center of the upper partition plate 2 and the middle partition plate 12,
28 to the spiral passage ends 17C, 18C.
It communicates with The outer side of the gas-liquid separation chamber 25 in the upper compartment 24 is an annular passage 29 through which a processing gas discharge pipe 30 fixed to the outer cylinder 1 is communicated. Note that the bottom of the lower compartment 8 and the annular passage 2
A processing liquid discharge pipe 31 and a separated liquid discharge pipe 32 are connected to each other at the bottom of each chamber. An annular header 33 is rotatably provided in the upper part of the lower compartment 8 via a plurality of supports 34. That is, the support 34 consists of an arm rod 35 that is continuous from the inner surface of the outer cylinder 1, and an arc member 36 attached to the tip of the arm rod 35, and the arc member 36 fits and holds the annular header 33 externally. do. A large number of nozzles 37 facing toward the liquid reservoir 9 are attached to the inner peripheral surface of the annular header 33 by insertion or screwing. Reference numeral 38 denotes a main liquid pipe that can be connected to and separated from the annular header 33, and its distal end threaded portion 38a can be screwed into a nut member 39 attached to the annular header 33. The liquid injection pipe 38 passes through a through hole 40 formed in the outer cylinder 1, and a flange 41 attached to the end thereof closes the through hole 40 and is attached to the outer cylinder 1 together with an elbow pipe 42. The other end of the elbow pipe 42 is connected to a main liquid injection pipe 43. 4
4 and 45 are maintenance holes formed in the outer cylinder 1;
It can be closed with lids 46 and 47.

In the above, when the combustion gas A is supplied to the combustion gas inlet part 6 of the bench lily 4 through the connecting pipe 5 while jetting water or caustic soda liquid from the spray nozzle 7, this combustion gas A is sprayed at the combustion gas inlet part 6. After being cooled and dusted by the liquid ejected from the nozzle 7, it is accelerated while passing through the bench lily 4, and is blown out from the gas discharge end 10 against the bottom plate 9A of the liquid reservoir 9. At this time, since the liquid ejected from the spray nozzle 7 is stored in the liquid reservoir 9, the bench lily 4
The gas blown out from the gas discharge end 10 collides with this stored liquid at high speed and vaporizes or atomizes it. The gas is reversed in flow direction by this collision and comes into contact with the vaporized or atomized liquid, removing any soot that has not yet been removed. At the same time, part of the sulfur dioxide gas in the gas is also absorbed by the droplets and removed. The combustion gas A comes into contact with the droplets jetted out from the nozzle 37 at high speed while reversing and rising, thereby absorbing and removing the sulfur dioxide gas. The combustion gas A then passes through the through hole 19 or through hole 20.
through which it enters the spiral passages 17,18. In the spiral passages 17, 18, impinging spray nozzles 2
Since the liquid is being ejected from 2 and 23, the combustion gas A that has entered the spiral passages 17 and 18 comes into contact with fine droplets from the collision type spray nozzles 22 and 23,
This absorbs and removes sulfur dioxide gas. The gas flowing through the spiral passages 17 and 18 is a high-speed flow,
Therefore, the sulfur dioxide gas absorption efficiency of fine droplets is high.
Moreover, the fine droplets are accompanied by the gas in the spiral passage 1.
7 and 18 to form a thin liquid film on the walls of the spiral passages 17 and 18, that is, on the surfaces of the spiral band plates 15 and 16, due to the centrifugal force of the gas energy. Therefore, unreacted sulfur dioxide gas in the gas comes into contact with this liquid film and is absorbed. In this manner, the gas is efficiently desulfurized while passing through the spiral passages 17 and 18 at high speed. The absorbing liquid that has absorbed sulfur dioxide gas falls into the lower compartment 8 from the through holes 19 and 20 as needed, and is discharged from the lower compartment 8 through the treatment discharge pipe 31 as required. The gas that has passed through the spiral passages 17 and 18 enters the gas-liquid separation chamber 25 from the center through the through holes 28 and 21. At this time, the gas is in a swirling flow, so it flows into the gas-liquid separation chamber 25 in the tangential direction, and after the gas flows in, it is discharged from the slit 26 in the tangential direction. At this time, the gas is separated into gas and liquid, and the liquid-separated processing gas B is discharged out of the system from the processing gas discharge pipe 30 through the annular passage 29 at a low speed. In addition, the liquid can be supplied to the annular passage 29 as needed.
The separated liquid is discharged through the separated liquid discharge pipe 32.

The nozzle 37 is repaired and inspected while the operation is stopped. That is, first, the elbow pipe 42 is removed, and then the liquid injection pipe 38 is unscrewed. Thereby, the annular header 33 is supported by the support 34 and becomes rotatable. Therefore, the nozzle 37 can be inspected, repaired, replaced, etc. by opening the lids 46 and 47 and manually turning the annular header 33 through the maintenance holes 44 and 45.

In the above embodiment, the annular header 33 is provided in the lower compartment 8, but it may be provided in the combustion gas inlet 6 instead of the spray nozzle 7.

As described above, according to the present invention, it is possible to easily repair and inspect a nozzle installed in a high temperature and high pressure area.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a longitudinal sectional side view, Fig. 2 is a view taken in the direction of - arrow in Fig. 1,
FIG. 3 is a view taken along the same arrow, and FIGS. 4 and 5 are longitudinal sectional side views of the main parts. DESCRIPTION OF SYMBOLS 1... Outer cylinder, 4... Bench lily, 6... Combustion gas inlet, 7... Spray nozzle, 8... Lower compartment, 9... Liquid reservoir, 10... Gas discharge end, 1
7, 18... Spiral passage, 22, 23... Collision type spray nozzle, 25... Gas-liquid separation chamber, 33...
Annular header, 34... Support, 37... Nozzle, 38... Liquid injection pipe, 38a... Threaded portion, 39...
... Nut member, 42 ... Elbow pipe, 43 ... Main liquid injection pipe, 44, 45 ... Maintenance hole, 46, 4
7... Lid, A... Combustion gas, B... Processing gas.

Claims (1)

[Scope of utility model registration request] An annular header is rotatably provided in the combustion gas flow path, a large number of nozzles are provided on this annular header, and a liquid injection pipe that can be connected and separated is provided on the annular header. A device for removing soot and sulfur dioxide from combustion gas, characterized by having a closable maintenance hole.