JPS6025173B2 - Solid and gaseous component removal equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for the removal of solid and gaseous components in a gaseous fluid stream, said apparatus comprising a cyclone separator for separating coarse solid components from the fluid stream. The fine solid and/or gaseous components present in the fluid stream are separated by wet scrubbing.

The gas stream may also contain large amounts of solids, as well as, for example, sulfur dioxide or other gaseous components that are harmful to the environment and which may be desired to be recovered from the fluid stream for other reasons.

The solid coarse components can be easily separated, for example with the aid of cyclone separators, various different designs of which are known. Although it is possible to achieve very high efficiencies with some cyclone separators, the gaseous components cannot be separated by any of these; as a result of this, wet cleaning is by and large the only possible method for gaseous components. , which allows the gaseous components to be separated from the fluid stream.

However, it is clear that wet cleaning cannot withstand arbitrarily high solids loads, and on the other hand, solids are valuable in the dry state, so wet cleaning alone is not necessarily the best possible for cleaning gas streams. Not in a good way. To separate certain components from a fluid stream, therefore, a combination of wet washing followed by a cyclone separator is encountered in a separation device, with both separation stages taking place within its own device. The equipment following these lines therefore has large dimensions and requires considerable amounts of energy since both stages have their own pressure losses. Difficulties caused by gas flow leakage, equipment wear and tear, and gas flow temperature are also drawbacks encountered with conventional equipment. Attempts have been made to eliminate the disadvantages of the combination constituted by a separate cyclone separator and a separate wet washer, and today dry filter units are specially used in dry filter units commonly used for separating mechanical waste. Suitable configurations can be used to guide both coarse and fine solid components to the separation unit.

On the other hand, it is not possible to separate the gaseous components from the fluid stream in the drying filter, and a separate wet cleaning process for these components is therefore also necessary in connection with the drying filter. The purpose of the present invention is to provide an apparatus that can perform separation using a new method more efficiently than the conventional method.
This device simultaneously removes both solid and gaseous components from a gaseous fluid stream.

Furthermore, it is an object of the invention to provide a device that has small dimensions and requires less energy. Yet another object of the present invention is to provide a device that is capable of substantially reducing the corrosion problems encountered with conventional devices. Other objects of the invention and the features achieved thereby will become apparent from the description of the invention. To achieve these objectives, the system of the present invention mainly consists of an apparatus in which a wet washer is arranged inside the central pipe of the cyclone separator, and a collection funnel is arranged below the central pipe, and a collection funnel is arranged below the central pipe. It is characterized in that a sludge consisting of fine solid and/or gaseous components separated by wet washing flows into the funnel. The invention will be explained in more detail with reference to preferred embodiments of the invention shown in the accompanying drawings, but the invention is not limited thereto. With reference to the figure, the apparatus of the invention comprises a cyclone separator 10, known per se, said separator comprising an inlet closure 12 for an incoming gaseous fluid stream 11, a central tube 16
and an outlet port 14 for the pure fluid stream 13. The cyclone separator 10 has a conical lower part 15.

Cyclone separator 10 may of course also be any other cyclone separator arrangement known in the art. The incoming fluid stream 11 rotates in the direction of the central tube 16 and creates a downward centrifugal motion which transports the coarse solid components to the outer periphery of the rotating fluid stream and transports them into the cyclone 1.
0 is separated on the shell wall and further precipitates in the conical lower part 15 and is collected at its bottom. The conical lower part 15 of the cyclone separator 10 has at its bottom a suitable discharge device 22 through which the separated dry solids effluent 2 is separated.
3 is collected. Fine solid components appear in the fluid stream 11 and gaseous components, however, are present at the inner circumference of the rotating fluid stream, and these enter the central tube 16 of the cyclone, which is open at the lower end.

A cleaning fluid (not shown) is preferably introduced into the central tube 16 such that the cleaning fluid spray is horizontally distributed in the central tube, so that the fluid flow entering the central tube 16 is a powerful liquid cleaning agent. As a result, the finer solids and gas components fall along the wall of the central tube 16 in the form of sludge. The wet scrubber disposed in the central pipe 16 of the cyclone separator 10 may be designed, for example, as a single rotating unit as shown in Japanese Patent Laid-Open No. 52-243 by the same applicant. , a set of distributor vanes is associated with the blowdown drop separator and connected to the tube and output blower, which are also shown diagrammatically at block 17 in the figure. With such a design, highly efficient 4-drop separation is achieved, resulting in an outlet stream 13
cleans both fine solid and gaseous components, and the gas stream is also dried free of cleaning liquid. the sludge combines with the dry solids deposited in the lower cone portion 15;
In the conical lower part 15 of the cyclone separator IQ, the central tube 1
A collecting funnel 18 is arranged below and concentrically with the central tube 16 to prevent the entry of sludge flowing downwardly from the central pipe 16 and into which said sludge flows.

The collection funnel 18 has a conical section 19 and a tubular section 20 leading out of the cyclone separator 10. Thereby, the sludge separated by wet washing can be recovered as a separated effluent 21. Collection funnel 1
8 is advantageously such that the distance h between it and the central tube 16 is adjustable. Regarding its diameter, the collection funnel 18 is conveniently slightly larger than the diameter of the central tube 16, but it may equally have a diameter equal to or smaller than the diameter of the central tube 16. This is because, instead of spreading the sludge onto the shell wall of the cyclone separator 10, the sludge forced by the fluid flow towards the central pipe 16 causing aggregation of the sludge flow is directed towards the collection funnel and into the central pipe 16. This is because it is guided into the space between it and the collection funnel 18. The collection funnel is also supported by the support member 2 supported by the conical lower portion 15 of the cyclone separator 10.
It is preferable that it be held by 4. It will be appreciated that other devices can be supported within the cyclone separator 10 as well. With the aid of the device according to the invention, this fluid flow constitutes separate effluents 23 and 21, respectively, without the use of separate devices, one for dry separation and the other for wet separation. It is possible to separate both the dry solids and the sludge separated in the cyclone separator 10.

At the same time, in the apparatus of the invention, the considerable pressure losses normally experienced when separate dry and green separations are used are eliminated. Furthermore, in the device of the invention, it is possible to deal with corrosion problems in a simple manner if the components separated by wet cleaning cause corrosion in the unit separately.

In the apparatus of the present invention, corrosive parts may be limited to the central tube 16 and collection funnel 18 so that the sludge that causes corrosion does not enter any other part of the apparatus. In the above,
Although only a principle solution to this problem has been presented, it is clear that a person skilled in the art can make various modifications based on this solution without leaving the scope of protection of the invention.

The wetting of the fluid flow in the central tube can be arranged in various different ways, and the distance between the central tube and the collection funnel, as well as the ratio of the diameters of these parts, depends on the particular application. The placement of the central tube and collection funnel within the cyclone may vary, and the relationship between them may differ.

[Brief explanation of drawings]

The figure is a diagrammatic longitudinal section showing a preferred embodiment of the device according to the invention. 10...Cyclone separator, 11...
Gaseous fluid flow, 12... Inlet Sekiguchi, 13...
・Pure fluid flow, 14... Outlet opening, 15...
...Conical lower part, 16... Central tube, 17.
...Wet cleaner, 18...Collection funnel, 19...
- Conical part, 20... tubular part, 21... effluent,
22... Discharge device, 23... Solid matter outflow, 24... Support member.

Claims (1)

Claims: 1. A cyclone separator 10 for removing coarser solid components from the gaseous fluid stream 11, including finer solid components and/or gaseous components present in the gaseous fluid stream 11. In an apparatus in which a liquid is separated by wet cleaning, a wet cleaning device 1
7 is arranged in the central tube 16 of the cyclone separator 10,
A collection funnel 18 is also arranged below the central tube 16 to collect the sludge formed by the finest solid and/or gaseous components separated by wet washing in the central tube 16. Device for the removal of solid and gaseous constituents in a gaseous fluid stream, characterized in that a tube 20 enters a funnel and from said collection funnel 18 is guided outside the cyclone separator 10. 2. Device according to claim 1, characterized in that the distance n between the central tube 16 and the collection funnel 18 is adjustable. 3. Device according to claim 1 or 2, characterized in that the collection funnel (18) rests on a support (24) of the conical lower part (15) of the cyclone separator (10).