JPS5924051B2 - Solid particulate matter discharge equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention discharges the solid substance whose activity has decreased from the bottom of a continuous moving bed type gas-solid contacting device that performs a contact operation between a moving bed consisting of a solid particulate active substance and a gas to be treated. The present invention relates to a device, particularly a device for quantitatively discharging the substance using its angle of repose capacity.

Recently, there has been a rapid increase in the number of machines and quantities that handle solid particulate materials, such as activated carbon and catalysts, which are extremely susceptible to damage.

For example, in exhaust gas desulfurization or exhaust gas denitrification for pollution prevention, a gas containing dust such as sulfuric acid mist or soot is brought into continuous contact with easily friable solid particulate matter such as a catalyst to physically or In order to maintain the performance of the substance during chemical treatment, it is necessary to continuously discharge solid particles whose activity has decreased quantitatively out of the apparatus for the purpose of continuous metabolism of the fresh substance.

That is, mist in the processing gas condenses and adheres to solid particulate matter, and dust adheres and accumulates, causing clogging and reducing the activity of the particles.

Furthermore, when the gas to be treated contains components that act as catalyst poisons, such as sulfur oxide, the activity of the solid particulate matter similarly decreases, so it is necessary to discharge the solid particulate matter outside the apparatus.

Furthermore, when using activated carbon to treat a gas containing adsorbed components, the surface of the activated carbon becomes saturated with the adsorbed components and its adsorption capacity (activity) decreases, so it must be discharged from the device after a certain period of time. There is.

Conventionally, an electromagnetic vibration feeder, a rotary feeder, a damper, a table feeder, or the like has been used as a device for discharging solid particulate matter from such a gas-solid contact device.

However, these devices each have advantages and disadvantages in terms of particle breakage degree, maintainability, quantitative ability, etc. For example, particle breakage degree is
The largest order is the row feeder, damper, and electromagnetic vibration feeder.

Regarding maintainability, each structure is different, but there are problems such as occurrence of structural defects due to vibration, material getting caught in moving parts, heat resistance problems due to rotational movement, gas sealing performance, and material leakage during opening/closing operations. A means to deal with damage etc. is required.

Regarding the quantitative nature of discharge, substances are constantly deposited in the lower accumulation part, and the substances tend to drift and fall, making it difficult to ensure an even discharge amount.

Therefore, the object of the present invention is to quantitatively remove solid particulate matter in a moving bed whose activity has decreased in a continuous moving bed type gas-solid contact device from the bottom of the device without causing damage, and also to prevent drifting and falling in large devices. There is one device that provides a device that can discharge the water uniformly and uniformly.

That is, the gist of the present invention is to provide a continuous moving bed type gas-solid contacting apparatus in which a moving bed is formed of an easily shatterable solid particulate active substance, and a gas to be treated is passed through the moving bed to carry out a contact operation. A device for quantitatively discharging one solid substance with reduced activity from the bottom of the container without crushing the solid substance,
(1) a base provided directly below the contact device; (2) a notch provided in the lower side wall of the contact device for discharging and accumulating the solid substance in an amount corresponding to the angle of repose on the base; (3) and the above. The apparatus for quantitatively discharging solid particulate matter with reduced activity is characterized by comprising a variable reciprocating scraper sliding on the base for scraping a fixed amount of discharged accumulated matter.

The present invention will be explained below with reference to the accompanying drawings.

FIG. 1 is an elevational view of a continuous moving bed type gas-solid contact apparatus using the scraper of the present invention, and FIG. 2 is a plan view of the apparatus shown in FIG. 1.

In FIG. 1, a gas-solid contact device 3 consisting of a particle hopper 2 and baffle plates 4 and 5 is filled with solid particulate matter 9.

Process gas conduits 7, 8 are installed across said apparatus 3, with process gas entering at port A and flowing through solid particulate matter transfer bed 6 to outlet B.

Since the lower side wall of the gas-solid contact device 3 is configured in the shape of a slot over its depth, the substance 9 in the gas-solid contact device 3 deposits an angle of repose on the base 10 by its own weight as shown in the figure. In one embodiment of the ejection mechanism implementing the device according to the invention, the scraper 1 has baffle plates 4, 5 orthogonal to the gas flow.
It reciprocates while sliding on the base 10 parallel to the above, and scrapes off a fixed amount of the substance.

After scraping, the material in the gas-solid contact device immediately forms its angle of repose due to gravity, and its volume remains constant.

As a result, the contained material is always scraped off in a quantitative manner in a very natural and unobstructed manner, and at the same time is always ready for subsequent operation, and particle breakage is significantly less than in conventional devices.

Since the movement of the discharge mechanism is reciprocating, the operation is simple and smooth, and excellent quantitative performance with ease of maintenance is guaranteed.

The results of a comparative experiment of the device of the present invention with a conventional device under various conditions and conditions show that the degree of particle breakage is 1/70 to 1/110 compared to the rotary feeder method and 1/2 compared to the electromagnetic vibration feeder method. ~1/l 5, 11 for damper method
5-1/6, l/1.5-1 for table feeder method
/2, showing outstanding effectiveness as well as quantitative performance.

The device of the present invention can be operated automatically and continuously using an electric motor, pneumatic pressure, or the like as power, or can be discharged intermittently at will by using a timer.

Furthermore, it is also possible to use a scraper mounted on a seamless belt that passes through the area where the angle of repose is formed.

[Brief explanation of the drawing]

FIG. 1 is an elevational view of a continuous moving bed type gas-solid contact apparatus using a discharge device according to the present invention, and FIG. 2 is a plan view of the apparatus shown in FIG. 1. 1... Scraper, 2... Solid particulate matter hopper, 3... Gas-solid contact device, 4...
... Baffle plate, 5... Baffle plate ~
g, 6... solid particulate matter transfer layer, 7...
... conduit, 8 ... conduit, 9 ... solid particulate matter, 10 ... base.

Claims (1)

[Claims] 1. In a continuous moving bed type gas-solid contact device in which a moving bed is formed of an easily shatterable solid particulate active substance and a gas to be treated passes through the moving bed to perform a contact operation, the activity decreases from the bottom of the device. A device for quantitatively discharging the above-mentioned solid substance without crushing, comprising: (1) a base provided directly below the above-mentioned contact device; (2) an amount of the solid substance equivalent to forming an angle of repose on the base; (3) a notch provided in the lower side wall of the contact device for discharge and accumulation; and a variable reciprocating scraper that slides on the base for scraping a certain amount of the discharged accumulated material. A device for quantitatively discharging solid particulate matter with reduced activity.