JPS6113055Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a device for treating soot and sulfur dioxide gas in combustion gas.The purpose of the invention is to be able to sufficiently deal with contact with liquid and gas, to reduce the overall weight, and to reduce thermal deformation. The purpose of this invention is to provide a device that can sufficiently cope with the above problems, and one embodiment thereof will be described below based on the drawings.

Reference numeral 1 denotes an outer cylinder divided 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. A connecting pipe 5 projecting above the outer cylinder top plate 1A is attached to the upper end of the bench lily 4 to form a combustion gas inlet section 6, and a spray nozzle 7 is provided on the connecting pipe 5. This spray nozzle 7 is located at the bench lily axis 4a.
It opens downward at the upper combustion gas inlet section 6.
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
It is opposed to the gas discharge end 10 of. The middle compartment of the outer cylinder 1 is divided into two upper and lower compartments by an intermediate partition plate 11.
Each compartment is provided with spiral strip plates 12 and 13 to form spiral passages 14 and 15. Lower partition plate 3 and intermediate partition plate 11
There are through holes 16 along the outer periphery of the
The openings 14A, 15A of the spiral passages 14, 15 are communicated with the lower compartment 8 through the through holes 16, 17. The spiral passage starting parts 14A, 15A are provided with a plurality of wide-angle circular spray nozzles 18 that open downwardly above the through holes 16, 17.
A plurality of impingement type spray nozzles 19, 20 are provided in the outermost passages 14B, 15B following the . The collision type spray nozzle 19 is formed by a pair of spray nozzles 19A and 19B that are horizontally opposed to each other, and can spray fine droplets (the same applies to the collision type spray nozzle 20). A gas-liquid separation chamber 21 is formed in the upper compartment of the outer cylinder 1 so as to surround the bench lily 4.
That is, the gas-liquid separation chamber 21 is configured by providing a cylindrical wall 23 having a large number of slits 22 in the circumferential direction between the outer cylinder top plate 1A and the upper partition plate 2. The spiral passage end 14 is connected to the spiral passage end 14 through holes 24 and 25 formed in the center of the spiral passage 11.
It communicates with C and 15C. The outer side of the gas-liquid separation chamber 21 in the upper compartment is an annular passage 26, and a processing gas discharge pipe 27 fixed to the outer cylinder 1 is connected to the annular passage 26. In addition, a processing liquid discharge pipe 2 is provided at the bottom of the lower compartment 8 and the bottom of the annular passage 26, respectively.
8 and a separated liquid discharge pipe 29 are connected to each other. The outer cylinder 1 and the outer cylinder top plate 1A are made of ordinary steel, and a corrosion-resistant casing 31 made of aluminum, nickel steel, etc. is provided on the inner surface of these with a leaf spring 30 interposed therebetween.

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 then passes through the through hole 16
Alternatively, it enters the spiral passages 14 and 15 through the through hole 17. In the spiral passages 14 and 15, a wide-angle circular spray nozzle 18 and an impinging spray nozzle 1 are installed.
Liquid is gushing out from points 9 and 20. Therefore, the combustion gas A entering the spiral passages 14 and 15 first comes into contact at high speed with the droplets sprayed by the wide-angle circular spray nozzle 18 at the start portions 14A and 15A, and then continues into the impinging spray nozzle 19. ,20
contact with fine droplets from. This absorbs and removes sulfur dioxide gas. The gas flowing through the spiral passages 14 and 15 is a high-speed flow, and therefore the fine droplets have a high sulfur dioxide gas absorption efficiency, and the fine droplets move along with the gas through the spiral passages 14 and 15, and absorb gas energy. The centrifugal force of the spiral passages 14, 15
A thin liquid film is formed on the wall surfaces of the spiral strip plates 12 and 13. 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 14 and 15 at high speed. The absorption liquid that has absorbed sulfur dioxide gas falls into the lower compartment 8 from the through holes 16 and 17 as needed.
The processing liquid is discharged from the processing liquid through the discharge pipe 28. The gas that has passed through the spiral passages 14 and 15 enters the gas-liquid separation chamber 21 through the through holes 25 and 24 from the center thereof. At this time, the gas is in a swirling flow, so it flows into the gas-liquid separation chamber 21 in the tangential direction, and after the gas flows in, it is discharged from the slit 22 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 27 through the annular passage 26 at a low speed. Further, the liquid is discharged from the annular passage 26 through a separation liquid discharge pipe 29 as required. In such an action, the gas and processing liquid do not come into direct contact with the outer cylinder 1 and the outer cylinder top plate 1A, but with the corrosion-resistant casing 31. The corrosion-resistant casing 31 undergoes thermal deformation due to contact with liquid or gas, but this is absorbed by the leaf spring 30 and is not transmitted to the outer cylinder 1 or the outer cylinder top plate 1A.

As mentioned above, according to the present invention, liquid contact,
The material in contact with the gas is made of a corrosion-resistant casing with chemical resistance, and the strength is made of ordinary steel, so there is no need to use high-grade materials or inner lining, and the whole can be provided at a low cost. can. At the same time, it is possible to reduce the overall weight. Furthermore, against thermal deformation such as thermal expansion, the corrosion-resistant casing can be freely deformed via the leaf spring, and the outer cylinder remains at room temperature without being subjected to external force.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a longitudinal sectional front view, FIG. 2 is a cross-sectional view in FIG. 1,
FIG. 3 is a longitudinal sectional front view of the main part. 1... Outer tube, 1A... Outer tube top plate, 4... Bench lily, 7... Spray nozzle, 10... Gas discharge end, 14, 15... Spiral passage, 18... Wide angle circular spray nozzle , 19, 20... Collision type spray nozzle, 21... Gas-liquid separation chamber, 27... Processing gas discharge pipe, 30... Leaf spring, 31... Corrosion resistant casing, A... Combustion gas, B... Processing gas .

Claims (1)

[Scope of utility model registration request] Soot in combustion gas, characterized in that a corrosion-resistant casing is provided via a leaf spring on the inner surface of an outer cylinder that has a bench lily that accelerates and releases combustion gas and a spiral passage for the gas released from the bench lily. and equipment for processing sulfur dioxide gas.