JPH04131424U - Purification equipment for NOx-containing gas - Google Patents

Abstract

(57) [Summary] Purification device for NOx-containing gas [Purpose] To ensure sealing between a vertical cylindrical adsorbent rotor, especially a plurality of gas passages formed on the outside of the rotor. [Structure] A vertical cylindrical adsorbent rotor 12 is housed in a casing 11. A partition wall 24 is provided on a casing peripheral wall 21 surrounding the rotor 12 so as to form a plurality of gas passages 25 to 28 between the casing peripheral wall 21 and the rotor 12. The rotor 12 is formed of a plurality of block-shaped adsorbents 61 arranged in the circumferential direction of the rotor 12. two seal plates 63
The bases of the adsorbents 61 are fixed to the distal ends of the partition wall 24 so that their respective distal ends can be brought into sliding contact with the adjoining adsorbents 61, respectively.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea allows for the use of relatively low concentrations of NOx (nitrogen), such as ventilation gas in road tunnels. This invention relates to an apparatus for purifying gas containing oxides.

0002

[Conventional technology]

As this type of equipment, equipment equipped with dehumidification equipment and denitrification equipment is known. . The dehumidifier is equipped with a dehumidifier rotor 71, as shown in Figure 4a. Dehumidification material The rotor 71 includes, for example, a plurality of plate-shaped adsorbents using silica gel as a moisture adsorbent and a plurality of It consists of alternating layers of corrugated absorbent material. Adsorbent rotor 71 has either half of the left or right The NOx-containing ventilation gas pipe is arranged so that the ventilation gas flows in a semicircular cross-sectional zone 71a. 72 is arranged, and the drying gas for regeneration is placed in the other half of the semicircular cross-sectional zone 71b. A purified ventilation gas pipe 73 is arranged so that it flows. The denitrification equipment is shown in Figure 4b. As shown, a NOx adsorbent rotor 74 is provided. The NOx adsorbent rotor 74 is For example, multiple plate-shaped adsorbents made of adsorbents with copper salts supported on zeolite carriers are used. It is overlapped with a suitable spacer. The NOx adsorbent rotor 74 has left and right Ventilation is carried out so that the ventilation gas after dehumidification flows into the semicircular cross-sectional zone 74a in one half of the gap. The gas pipe line 75 is arranged, and the cross-sectional fan zones of 1/3 each make up the other half. 71b, 71c, and 71d so that the NH3-containing regeneration circulating gas flows in sequence. A circulation circuit 76 is arranged.

0003

[Problem that the idea aims to solve]

In the above equipment, the maximum outer diameter of the rotor that can currently be manufactured is approximately 5 m, and this There is a limit to the amount of gas that can be processed with a rotor of approximately 200,000 Nm3/h. It was not possible to process gas in excess of this amount.

0004 Therefore, we adopted a vertical cylindrical adsorbent rotor with a large capacity gas processing capacity. is being considered, but the NH3-containing regeneration gas is at a fairly high temperature of around 250℃. This makes it difficult to seal the inside and outside of the rotor as the rotor becomes thermally non-uniform. There are problems that need to be resolved.

[0005] The purpose of this invention is to create a vertical cylindrical adsorbent rotor, especially one formed on the outside of the rotor. We propose a purification device for NOx-containing gas that can reliably seal between gas passages. It is about providing.

[0006]

[Means to solve the problem]

The NOx-containing gas purification device according to this invention consists of a casing and a It is equipped with a vertical cylindrical adsorbent rotor and a casing peripheral wall surrounding the rotor. A partition wall is provided to form multiple gas passages between this and the rotor. The seal is made up of a plurality of block-shaped adsorbents lined up in the circumferential direction, and two seals are attached. The base of the plate is so that each tip can be brought into sliding contact with the adjoining adsorbent. It is fixed to the tip of the partition wall.

[0007]

[Effect]

The NOx-containing gas purification device according to this invention includes a casing and a It is equipped with a vertical cylindrical adsorbent rotor and a casing surrounding the rotor. A partition wall is provided in the wall to form a plurality of gas passages between the wall and the rotor. The data is made up of a plurality of block-shaped adsorbents lined up in the circumferential direction, and two sheets The base of the plate is so that each tip can slide into adjoining adsorbent material. Since the seal plate is fixed to the tip of the partition wall, at least one of the seal plates is Sliding contact with block-shaped absorbent material.

[0008]

【Example】

An embodiment of this invention will now be described with reference to the drawings.

[0009] The NOx-containing gas purification device consists of a casing 11 and a vertical circle housed in the casing 11. A cylindrical NOx adsorbent rotor 12 is provided.

0010 The casing 11 has a vertical cylindrical peripheral wall 21 surrounding the outer surface of the rotor 12 at intervals. , and a top wall 22 and a bottom wall 23 that are connected to the top and bottom ends of the top wall 22 and bottom wall 23, respectively.

[0011] The peripheral wall 21 is provided with three external partition walls 24 extending inward from the inner surface thereof. As a result, between the peripheral wall 21 and the rotor 12, there are an external ventilation gas passage 25 and three external regeneration gas channels. Circulation passages 26-27 are formed. In addition, the peripheral wall 21 includes an external ventilation gas passage 25 and A discharge pipe 29 is provided which communicates with each of the three external regeneration gas circulation passages 26 to 27. (Only two outlet pipes are shown). The inside of the rotor 12 corresponds to three external partition walls 24. Three internal partition walls 32 are provided that extend radially from the central support 31. , an external ventilation gas passage 24 and three external regeneration gas circulation passages 26 to 27 are provided inside the rotor 12. Corresponding to this, an internal ventilation gas passage 35 and three internal regeneration gas circulation passages 36 to 38 are formed. It is.

0012 The top wall 22 has internal ventilation gas passages 35 and those of the three internal regeneration gas circulation passages 36 to 38. An inlet pipe 39 communicating with each is provided (only two outlet pipes are shown). moreover , an annular slit 41 is formed in the top wall 22 to expose the upper end surface of the rotor 12. ing. A reinforcing ring 42 is fixed to the upper end surface of the rotor 12 and is inserted into the reinforcing ring 42. A downwardly directed annular sealing groove 43 is provided. At multiple locations on the upper end of the rotor 12 A plurality of pairs of vertical steadying rollers 44 are arranged so as to be sandwiched from the inside and outside, and A compression coil spring 45 is interposed between the inner and outer surfaces of the seal groove 43 and the steady roller 44. , As a result, the pair of rollers 44 are urged by the spring 45 in a direction toward each other. Ru. A rubber seal is placed between the bottom of the seal groove 43 and the top of the reinforcing ring 42. A ring 46 is interposed.

[0013] An annular slit 47 is formed in the bottom wall 23 to expose the lower end surface of the rotor 12. ing.

[0014] The NOx adsorbent rotor 12 is made of the same material as the conventional NOx adsorbent rotor explained at the beginning. It is made of materials.

[0015] The lower end surface of the rotor 12 is supported by a driving roller 51 and a plurality of driven rollers 52. Ru.

[0016] The base of the annular inner seal plate 53 made of a leaf spring is fixed to the lower end of the inner peripheral surface of the rotor 12. In both cases, the base of an annular outer seal plate 54 made of a leaf spring is fixed to the lower end of the outer peripheral surface of the rotor 12. It is. The tip of the inner seal plate 53 is brought into sliding contact with the inner edge of the slit 47 of the bottom wall 23, The tip of the outer seal plate 54 is brought into sliding contact with the outer edge of the slit 47 of the bottom wall 23.

[0017] Referring to FIG. 3, the rotor 12 is formed of a large number of block-shaped adsorbents 61. . The inner ends of these adsorbents 61 are in contact with each other, but the outer ends are separated. They are lined up in the circumferential direction of the rotor 12 in a state of being oriented. Filler is placed in the gap between adjacent adsorbent materials 61. 62 is filled. For this purpose, the outer peripheral surface of the rotor 12 is a continuous, smooth cylindrical surface. Rather, it is a combination of planes, so to speak, on the outer peripheral surface of the rotor 12, There are irregularities. The reason why the rotor 12 is made of block-shaped absorbent material 61 is that it is easy to manufacture. This is because it is easy to use, and if it is standardized, it will be easy to replace.

[0018] FIG. 3 shows one outer partition wall 24 and one inner partition wall 32. External partition wall 24 The bases of two rubber outer seal plates 63 are fixed to the tip of the At the same time, the tip of the internal partition wall 32 has two rubber inner walls along its entire length. The base of the seal plate 64 is fixed. These two outer seal plates 63 and inner seal plates The tips of the roll plates 64 are brought into sliding contact with adjacent adsorbents 61, respectively. This results in Despite the presence of irregularities on the outer peripheral surface of the rotor 12, the distance between the rotor 12 and the partition walls 24 and 32 leakage is prevented.

[0019] NOx-containing ventilation gas is led from the internal ventilation gas passage 35 to the external ventilation gas passage 25, and is When the ventilation gas passes through the rotor 12, NOx contained in the ventilation gas is transferred to the rotor 12. is adsorbed and removed. On the other hand, there are three inner regeneration gas circulation passages 36 to 38 and an outer regeneration gas circulation passage. By circulating the NH3-containing regeneration gas between the passages 26 and 27, the rotor 12 is sequentially regenerated. Raw gas passes through to cool, regenerate and preheat the rotor 12.

[0020] When the gas is purified in the manner described above, the rotor 12 becomes thermally non-uniform. the Therefore, even if the rotor 12 expands locally, it can freely move upward between the steadying rollers 44. Since it can be extended, no excessive force is applied to the rotor 12.

[0021] In addition, since the alignment of the upper end of the rotor 12 is automatically performed by the anti-sway roller 44, , the rotor 12 rotates smoothly.

[0022]

[Effect of the idea]

According to this invention, at least one of the seal plates is made of block-shaped adsorbent. Because of the sliding contact, it is possible to ensure a seal between the rotor and the partition wall, and therefore The gas passage formed on the outside of the rotor can be reliably sealed by the partition wall. can.

[Brief explanation of drawings]

FIG. 1 is a vertical longitudinal sectional view of the invented device.

FIG. 2 is a perspective view of the invented device.

FIG. 3 is an enlarged sectional view taken along the line III--III in FIG. 1;

FIG. 4 is a perspective view of a conventional device.

[Explanation of symbols]

11 Casing 12 Rotor 21 Casing wall 25～28 Gas passage 61 Adsorbent 63 Seal plate

──────────────────────────────────────────────── ─── Continuation of front page (72) Creator Hidetsugu Kobayashi Hitachi, 5-3-28 Nishikujo, Konohana-ku, Osaka Within Shipbuilding Co., Ltd. (72) Creator Osamu Nakanishi Hitachi, 5-3-28 Nishikujo, Konohana-ku, Osaka Within Shipbuilding Co., Ltd.

Claims (1)

[Scope of utility model registration request] [Claim 1] A casing 11 and a vertical cylindrical adsorbent rotor 12 housed in the casing 11. A casing peripheral wall 21 surrounding the rotor 12 has a plurality of gas passages 25 to 12 between the casing 11 and the rotor 12. A partition wall 24 is provided to form 28,
The rotor 12 is formed of a plurality of block-shaped adsorbents 61 arranged in the circumferential direction thereof, and the bases of two seal plates 63 are partitioned so that the tips of each can be brought into sliding contact with the adjoining adsorbents 61. A NOx-containing gas purification device fixed to the tip of the wall 24.