JPS6012900B2 - Powder gas processing equipment - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to gas treatment of powder and granular materials, such as heat treatment of powder and granular materials in a reaction vessel, such as gasification of coal, and the use of a fluidized medium downstream thereof. The present invention relates to a cooling device for producing a catalyst, and a structure of an apparatus for producing a catalyst used as a reaction vessel.

<Prior art and its problems> A coal gasification apparatus, which has been known as such an apparatus, will be explained with reference to FIG.

The gasifier 15 contains char (carbon-like material) as a byproduct of this reaction device, and oxygen and water vapor are supplied from the lower end pipe 16. On the other hand, Tsumugi granular coal and heavy trade oil slurry are supplied from the nozzle 17 as materials for gasification, and are partially combusted in a fluidized state to generate a reaction gas containing a mixture of CH4, CO2, CO, and the like. This reaction gas is separated from the accompanying gas by a cyclone 18 and is returned to the gasifier 17 through a pipe line 19. On the other hand, the high-temperature gas from which the char has been separated flows through the pipe line 20 to the fluidized bed heat exchanger 21, where the heat is recovered and steam S is generated. sent to. Further, as an application of such an apparatus, there is a batch type reaction vessel as a simple apparatus for producing a catalyst.

As a conventionally known apparatus for performing a so-called batch-type operation in which all contents are discharged and new materials are replenished each time, there is an apparatus shown in FIGS. 1 to 3. The container main body la is rotatably supported by a bearing 15a, and this support shaft is provided with a gas inlet 7a for passing the processing gas and a gas outlet 8a for discharging the gas. A powder storage box 12a having a single perforated plate 2a as a bottom plate is provided in the container body la, and is supported from the wall of the container body, and the powder and granules stored in the powder storage box are processed from the top side. We are trying to supply gas. Further, a rake 4a for leveling the powder and granules extends out from above and is rotated by a rake motor 10a.
Further, as an example of gas processing, in order to perform heating and cooling, high-temperature gas is supplied from the gas inlet 7a, and after a certain period of time, low-temperature gas is similarly supplied from the gas inlet 7a. As a result, the container body is subject to thermal fatigue, causing clutching, which poses a safety problem for the device. Furthermore, when using several different types of gas, there are problems such as the need to mix the different gases or to perform a gas purge process to discharge the gas from the previous process. Further, in this apparatus, in order to discharge the processed powder and granular material, it is necessary to overturn the container body using a motor la for rotating the container body. This is time-consuming in terms of work time, and it is necessary to overturn a large container and "inlet part 7a, outlet part 8a"
that a rotating connection must be provided to the gas line;
There are problems such as the need to be careful not to accidentally drop accessories, etc., and the possibility of dust scattering. The process of producing a catalyst using this reaction vessel will be briefly explained.

Catalysts are usually used in various shapes such as granules and katana shapes. For the removal of nitrogen oxides (NOx), fine powder particles of ore containing Ni, Cr, etc. are kneaded as a main layer, formed by extrusion etc., fired, and then cooled with steam. There is a process. This activation is a process of making the molded catalyst porous and increasing its contact area with the reaction gas. There is a strong need for a device that facilitates the heating, cooling, and removal of the catalyst from the container. Purpose of the Invention> This invention eliminates the need for the above-mentioned work of tipping over the container body, thermal fatigue, and the rake-like device used in "taming", and improves the processing efficiency of the first stage when supplying two or more types of reaction gases. The purpose is to provide a device that does not mix with gas.

<Summary of the means> An inlet valve and an outlet valve for the powder are provided on the side wall of a powder storage chamber partitioned and formed by a perforated plate, and the bottom plate of the perforated plate has an inclination greater than the angle of repose of the contained powder. Connect the outlet valve of the front container to the inlet valve of the adjacent rear container, connect multiple reaction containers in series, and invert the entire container to accommodate and discharge the powder and granules. This gas treatment device is designed to be able to perform operations with a reduced number of movable members without any problems.

Embodiment 1> The structure of an apparatus according to a first embodiment of the present invention will be explained with reference to FIG.

A plurality of perforated plates 2', 2'', and 3 are provided inside the container body 1 in a spaced manner. Powder is supplied from an inlet valve 4 to a space surrounded by a perforated plate 2 consisting of thin perforated plates 2' and 2'' and a wall of the container body. The processing gas is supplied from the supply nozzle 7 to the perforated plate 3 and the perforated plate 2.
', passes through the powder layer 14, passes through the perforated plate 2'', and the discharge nozzle 8. so that it is tilted. The perforated plates 2' and 2'' are installed parallel to each other so that the resistance is uniform when the processing gas passes through the powder layer 14.Also, the powder and granules have different particle sizes. When mixing granules, the pore distribution density of the perforated plate 3 may be changed, or a guide plate (not shown) may be provided in the space between the perforated plate 2' and the perforated plate 3 to ensure an even flow of the processing gas. 14
Let it arise within you. When the gas treatment is completed, the outlet valve 5 operated by the air cylinder 6 is opened, and the powder and granules are placed along the upper surface of the perforated plate 2'' at an angle Q larger than the angle of repose of the perforated plate 2'' with respect to the horizontal. The flow is discharged. <Example 2
> In addition, as shown in FIG. 5, a plurality of container bodies as described above are connected, for example, the outlet valve 5' of the first container in the upper stage and the inlet valve 4'' of the second container in the lower stage are connected directly or through a connecting pipe 13. When the containers are connected in series through the container body 1', only heating gas can be supplied to the container body 1', and cooling gas can only be supplied to the container body 2''.

The amount of powder and granular material filled in each container can be confirmed with a level gauge shown at 9 in FIG. Further, in this case, the inlet valve 4'' can be omitted. When such container bodies are connected in series, it is possible to easily carry out processing steps using a plurality of types of processing gases.
<Example 3> In Fig. 6, the mode of partitioning of the perforated plate is different from that in Fig. 4, and the perforated plate is arranged at a angle of repose of the powder and granular material with respect to the axis of the container connecting the supply nozzle and the discharge nozzle. The case is shown in which the container bodies lb and lb' are positioned with their axes vertical, and the perforated plates 2b and 2b' have oblique angles.

In short, this invention relates to a gas treatment device that performs gas treatment by heating or cooling a powder or granular material within a reaction vessel, in which the gas flow is controlled within a reaction vessel body having a supply nozzle and a discharge nozzle for the gas to be gas treated. A container body partitioned by a plurality of mutually parallel perforated plates intersecting each other and positioned so that the perforated plate surfaces are inclined with respect to the horizontal at an angle of repose of the powder or granular material or more; The space between each set of perforated plates is used as a powder storage chamber, and the powder storage chamber is provided with an inlet valve and an outlet valve for the powder and granular material. do.

<Effects> By implementing this invention, the following effects can be obtained.

'1} Even if the batch type operation according to Example 1 is performed, there is no need to overturn the entire container, there is no danger associated with overturning of a high-temperature container, safe work can be performed, and mechanical equipment necessary for overturning is required. Power was no longer needed. '2' In the conventional batch method, heating and cooling using gas are performed in one container, so there is a problem of damage to the container due to thermal shock due to heating and cooling and the occurrence of cracks accompanying this.

Since they are arranged in series as in Examples 2 and 3, heating and cooling are performed in separate containers, and no problem occurs. {3' When two or more containers are connected in series as shown in FIGS. 5 and 6, each container can react with a different gas.

In the secondary equipment, when switching and supplying different types of gas, there was a problem of mixing with the residual gas from the previous process, but such concerns are no longer present.

{4} Movable parts are outlet valves 5', 5'' and inlet valves 4', 4
'', there were fewer equipment failures and the equipment had a longer lifespan.

[Brief explanation of drawings]

Figure 1 is a vertical cross-sectional view of a conventional gas treatment equipment, and Figure 2 is a vertical cross-sectional view of a conventional gas treatment equipment.
A cross-sectional view taken along line A-A in Figure A-A; Figure 3 is a diagram showing the state when the container body for discharging powder and granular material is turned over;
FIG. 4 is a longitudinal sectional view of the device of the first embodiment according to the present invention, FIG. 5 is an external view of the second embodiment in which the devices of FIG. 4 are connected in series, and FIG. 6 is a perforated plate. FIG. 7 is a partial system diagram showing an example of a coal gasification device. 1, 1', 1'', lb...container body, 2, 2', 2'',
2b, 2b'...perforated plate, 3...perforated plate,
4... Inlet valve, 5, 5'... Outlet valve, 6... Air cylinder, 7... Supply nozzle, 8... Discharge nozzle, 9
... Level gauge, 10a ... Rake motor, 11a
... Container body rotation motor, 12a... Powder storage box, 13, 13'... Connecting pipe, 14, 14a... Powder layer. Figure 1 Figure 4 Figure 2 Figure 3 Figure 5 Figure 6 Figure 7

Claims (1)

[Scope of Claims] 1. In a device that performs gas treatment by heating or cooling powder in a reaction vessel, a plurality of gas treatment nozzles are provided inside the reaction vessel body having a supply nozzle and a discharge nozzle for the gas to be gas treated so as to intersect with the gas flow. A container body partitioned by mutually parallel perforated plates and positioned so that the perforated plate surfaces are inclined with respect to the horizontal at an angle of repose greater than the repose angle of the powder and granules, and a set of two adjacent perforated plates. A gas processing device for powder and granular material, characterized in that the space between the perforated plates is used as a powder and granular material storage chamber, and the powder and granular material storage chamber is provided with an inlet valve and an outlet valve for the powder and granular material. 2. The interior of the container body is defined by a plurality of diagonally intersecting perforated plates whose surfaces have an angle of inclination equal to or greater than the angle of repose of the powder or granular material around the axis of the container body, as set forth in claim 1. Gas treatment equipment for powder and granular materials. 3. Claim 1 or claim 3, characterized in that a plurality of reaction vessel bodies are arranged in series, with the outlet valves of the preceding reaction vessel bodies connected to the inlet valves of the subsequent reaction vessel bodies. 2. The gas treatment device for powder and granular material according to item 2.