SU747401A3 - Device for adsorption purification of gases - Google Patents

Abstract

1382799 Purifying gases SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ NV 1 Feb 1972 [3 Feb 1971] 4663/72 Heading B1F Apparatus for the treatment of gases containing undesirable compounds in addition to solid matter by contacting them with a gas treatment solid comprises at least two gas treating spaces of substantially the same size and shape provided within one or more columns, gas inlets to said spaces and gas outlets therefrom, and means for directing a gas to be treated alternately through each said space, each said space being provided with a plurality of containers for a gas treatment solid, which containers are so constructed of gas permeable material that they contain a system of substantially parallel gas channels and chambers for said solid, the boundaries of the gas channels being formed, at least substantially, by the walls of the adjacent chambers, which containers are so placed in said spaces that when during operation the chambers are charged with said solid, the gases to be treated will flow through the gas channels thereof. A container is exemplified in Fig. 7 in which a folded gauze 45 has inserts 49 and 50 and contains treatment solid to form alternate empty and treatment channels. The treatment of flue gas to remove sulphur oxides using metal and/or metal compound accepters of copper or banadium is referred to.

Description

54) DEVICE FOR ADSORPTION CLEANING The invention relates to the field of adsorption cleaning of gases, such as flue gases from sulfur oxides. A device for treating gases by contacting a gas with a solid substance is known, consisting of a housing with nozzles for inlet and outlet of gas, which the vertical partition divides into two cavities filled with a sorbent. A disadvantage of the known device is that the sorbent filling the cavity quickly loses its permeability when gases containing solid particles pass through it. The aim of the invention is to increase the efficiency of gas cleaning. The essence of the invention is that the proposed device. which is provided with direct-shaped containers made of mesh plates arranged parallel to the vertical sides of the containers and installed one above the other at a distance, and guide vanes located between the gas inlet nozzle and the first container. The containers are filled with an adsorbent and made of gas-permeable mesh plates in such a way that GASES form a system of parallel open gas channels. FIG. 1 shows the proposed device; General view of figure 2 - section aa of fig. one; in fig. 3 - section bb FIG. 1. The device consists of a housing 1 with nozzles of the input 2 and the output gas 3, inside which are placed the containers. 4. The containers are housed in a polygonal casing 5, which is supported by the supporting elements 6 on the cylindrical carrier along cross section 7 attached to the inner wall of the housing. This method of attachment is tight enough to prevent gases to be processed upwardly escaping between the wall of the casing and the casing 5. The bottom layer of containers 4 lies on the grid 8, which in turn is held by the supporting ring 9 and the supporting bars 10 lying on the supporting elements 11 attached to the inner wall of the housing. These carriers 11 are located above the inlet 2. Support bars 10 may have vents to immediately balance any pressure that may develop under grid 8, thereby preventing uneven distribution of the gas flow through the containers. The polygonal casing 5 has, in various places, horizontal stiffening elements 12, as well as anchor elements 13 associated with fastening elements 14. The polygonal casing 5 can be suspended inside the casing, for this purpose, the elements b and c 7 fasten to the upper part of the casing. Between the gas inlet nozzle and the first layer of containers, guide vanes 15 are placed. In addition, the housing has hatches 16 and 17.

The polygonal casing 5 is hexagonal in shape and has three anchor elements 13 fastened together with fasteners 14. The hexagonal casing 5 is filled with containers 4, the cross section of which is, for example, a parallelogram with corners 60 and. For the entire space to be filled, eight containers 4 must be divided in half.

The ring 9 and the bars 10 form a structure that holds the containers in the casing 5. The ring 9, in which the bars 10 are fixed, lies freely on the elements 11 designed for thermal expansion.

The proposed device works as follows.

The gas to be purified through the inlet pipe 2 enters the housing. 1, where the guide vanes 15 change the direction of the gas flow, causing the gases to pass through the open gas channels of the containers. Impurities that need to be removed come into contact with the adsorbent by diffusion through the gas-permeable walls of the channels. After passing through the row of containers, the treated gases are discharged from the upper part through the nozzle 3 outlet.

In the process of removing sulfur oxides from flue gases under oxidizing conditions at elevated temperatures, flue gases are in contact with adsorbents that trap sulfur oxides. Preferably, if the adsorbent contains metallic copper or vanadium. When the sorbent is overloaded with sulfur oxides, it is regenerated by the reducing gas. As a result, the metal sulphate formed decomposes and the metal is reduced in metallic form.

Thus, if the adsorbent is deactivated or its activity falls below a certain minimum

values, the gases to be processed go to the next container, and the spent adsorbent is regenerated or replaced in the meantime.

In order to regenerate the solid (adsorbent) filling the containers 4, regenerative gas is passed through the body 1 in countercurrent. The inlet 18 for regenerative gas is made in the housing cover 19, and the outlet 20 in the lower part of the housing located on the tray 21. To evenly distribute the regenerative gas throughout the housing in the upper part of the housing there is a perforated plate 22. In the lower part of the housing there is a perforated plate 23, which serves to evenly distribute the cleaning gas supplied through the outlet 20 to the housing space.

0 as a reducing gas can be used hydrogen monoxide or carbon, or a mixture of hydrogen-containing gases.

FIG. 1 pipe 2 and 3 are located on one side of the housing. However, it is possible to use both the lower and the upper nozzle for the inlet and vice versa, depending on the flow in the space of the housing, when the guide vanes 15 for deflecting the gas flow can be installed in various places in accordance with the placement of the nozzle of the gas flow .

Claims (1)

1. Patent GDR 69785, cl. B 01 D 53/02, 11.20.69 (prototype).