RU2513085C2 - Process conveyor for sorbent powders - Google Patents

Abstract

FIELD: transport.

SUBSTANCE: invention relates to handling of sorbent powders. Proposed conveyor consists of a cistern made from antirust material fixed in stiff carcass and equipped with hatches with covers. Said cistern accommodates air feed circuit (16), hot water feed circuit (17) and water wash system (18) for preparation of sorbent powder for further application. Dust control system (21) is arranged directly under unloading hatches for water spraying to produce anti-dust curtain. Pulp is discharged from container by water feed via pipe into ejector.

EFFECT: expanded performances, higher quality of sorbent powders, lower labour input.

3 cl, 3 dwg

Description

The invention relates to containers (containers) for transporting, storing, unloading and carrying out technological operations with bulk powder materials used in water treatment, mainly powdered activated carbons (PAHs).

In the practice of water treatment, there are flood and emergency periods, which are characterized by multiple (10 times or more) increase in pollutants in the water, but do not last long (from 1 to 20 days). The construction of a full complex of treatment facilities for such situations is not economically feasible, and the storage of emergency stocks of special substances in permanent storage facilities in the territory of water treatment facilities requires additional space and special precautions. For such extraordinary situations, when it is necessary to quickly purify water from toxicants and improve water quality indicators to appropriate standards, special powdered sorption materials are effectively used - sorbents based on mineral chips (clinoptilolite) or microporous carbon materials with a highly developed surface, for example, powdered activated carbons (PAH).

For the implementation of emergency water treatment technology, it is required to quickly deliver the sorbent to the place of intended use, unload it in the supply and solution containers and prepare a working solution of a given concentration for water treatment.

However, in carrying out these operations with PAHs, a number of technical, environmental, and technological problems arise due to their physical properties:

- PAH is a corrosive and fire and explosion hazardous substance, which complicates its transportation and loading and handling operations;

- coal dust generated during unloading of PAHs creates an environmental hazard of environmental pollution, as well as harmful to the health of personnel;

- caking of powdered materials during transportation and storage is the reason for the formation of stagnant zones of the material inside the containers, which makes it difficult to unload;

- since powdered sorbents are usually packaged and transported in bags, the process of unloading from bags and subsequent loading into containers is very time-consuming and lengthy;

- the high complexity of the preparation of the sorbent powder for dosing the working solution (pulp), since the effectiveness of the use of PAHs in the water treatment process directly depends on the quality of its preparation.

The proposed invention aims to solve these problems by creating a universal transport and technological container designed for mobile transportation, unloading, storage and use as a container for preparing PAHs for further use.

A device for transporting bulk materials is known, which is mainly used for loading bulk materials, consisting of a loading hopper, an ejection chamber, a material pipe with a torch-forming nozzle, an ejector and a collector for supplying water. The ejection chamber is located under the hopper and has an aeration bottom through which the mixture is saturated with air and maintained in suspension. An air duct is installed in the ejection chamber connected to the air supply system. The collector for supplying water for wetting the dry mixture is designed to form a torch with the desired consistency (RF patent 2064427, B65G / 30, 1993). The known device allows you to optimize the unloading of bulk materials of various types due to aeration and wetting systems, however, has a narrow specialization and is not adapted to perform other functions than unloading.

A known container for long-term storage and dry unloading of powdered activated carbon (PAH), providing a uniform supply of activated carbon by supplying dry air through the air circuit and air pads located in the lower cone of the container.

The container for PAHs consists of a hopper for storing activated carbon, as well as an air supply system, including an air intake pipe, a plurality of air outlet areas, and a dry air supply device. The activated carbon storage bin is made as a single cylindrical shell with upper and lower conical bottoms. An air supply pipe and air pads connected to it are connected to a dry air supply device. PAHs are unloaded from the container by blowing air through an ejector. The aeration system provides the loosening of the caked mixture, thereby increasing the efficiency and productivity of the discharge. (KR patent 100991701, B65D 88/70, 2010.04.13). A disadvantage of the known device is the limitation of its functions only to storage and unloading, since the container is not intended for transportation or use as a container for the preparation of PAHs. In addition, during dry unloading of PAHs, significant dusting can form, since there are no dust suppression means in the known device.

As a device of the same purpose, the set of features of which is closest to the declared one, this technical solution is taken as a prototype of the proposed invention.

The technical result achieved by the implementation of the invention is the versatility of the proposed container, expanding its functionality, reducing the load on environmental systems and personnel, the efficiency of use in emergency situations due to mobility and efficiency, improving the quality of preparation of powdered sorbents, reducing the complexity of loading and unloading work, as well as operating costs due to savings in production space.

The specified technical result is achieved due to the signs that distinguish the proposed technical solution from the prototype, which includes a cylindrical tank, ejector and air supply system, and consisting in the following:

- the tank is made of corrosion-resistant material and fixed in a rigid frame;

- in the side surface of the tank hatches are made, equipped with covers, between which there are service areas;

- at the end of the tank is a pipe system, including an air supply pipe, a hot water supply pipe to a tank, a water supply pipe to a hydraulic wash, a water supply pipe to a dust suppression, a water supply pipe to an ejector, an overflow pipe, a pulp discharge pipe, an empty pipe for a tank equipped cranes;

- to protect the nozzles during transportation and storage of the container, a casing is provided;

- the air supply system is located inside the tank in its bottom and is a circuit made in the form of a manifold and pipes, in which holes are made from below, and connected to the air supply pipe;

- inside the tank there is a circuit for supplying hot water to the tank, which is a collector with pipes in which holes are made on both sides, and connected to a pipe for supplying hot water to the tank;

- above the hot water and air supply circuits there is a hydraulic flushing system consisting of a continuous supply pipe with a water flushing nozzle connected to a manifold with spray nozzles;

- overflow connected to overflow pipe;

- a circuit for dust suppression installed inside the tank directly under the hatches, connected to a nozzle for supplying water for dust suppression, consisting of pipes with nozzles placed in pairs on them;

- an ejector located inside the tank with a pipe for draining the pulp, connected to a pipe for supplying water to the ejector.

The invention is illustrated by drawings, where Fig. 1 is a general view of a universal container, Fig. 2 is a system of nozzles located at the end of the tank, and Fig. 3 is a layout of water and air supply circuits inside a container tank.

The transport and technological container for powdered sorbents consists of a tank 1 made of a corrosion-resistant material and fixed in a rigid frame 2 that protects the tank during transportation. In the upper part of the tank there are 3 hatches equipped with covers. Near the hatches are platforms 4, designed for maintenance or installation of additional equipment. At the end of the tank is a system of nozzles 5, equipped with taps.

To protect during transportation and storage, the nozzles are closed with a safety box 6. If necessary, for the safety of personnel, the sites can be equipped with fences, as well as stairs 7 to the sites.

Figure 2 shows in more detail the pipe system, which includes: pipe 8 for supplying air, pipe 9 for supplying hot water to the tank, pipe 10 for supplying water for hydraulic washing, pipe 11 for supplying water for dust suppression, pipe 12 for supplying water to the ejector, pipe 13 overflow, pipe 14 for the removal of pulp and pipes 15 for emptying the tank.

According to Fig. 3, an air circuit 16, a lower hot water supply circuit 17, a hydraulic flushing system 18, an overflow 19, an ejector with a water inlet 20, an upper dust suppression circuit 21 connected to the corresponding nozzles via flexible hoses are placed inside the tank.

The air circuit 16 carries out the bubbling of PAHs, its intensive mixing, as well as maintaining in suspension during unloading. The circuit is located in the bottom of the tank and is connected through a pipe 8 to the air supply system through a flexible hose. Air is distributed throughout the thickness of the powder through openings in the walls of the manifold pipes located on both sides of the pipe.

The bottom hot water circuit 17 is located above the air circuit. The circuit is made in the form of a collector and pipes in which there are openings, so that water is distributed throughout the entire thickness of the sorbent and moistens it evenly. The specified circuit is connected through a pipe 9 for supplying water to the hot water supply system through a flexible hose.

A pipe 17 is located above the hot water and air supply circuit, supplying water to the hydraulic washing system, which is designed for hydraulic mixing of coal, erosion of packed coal in stagnant zones, which are formed, as a rule, after a long period of inactivity of the container. The system consists of a continuous supply pipe connected to a collector (comb) with nozzles installed in it, guiding the flush to the side of the nozzles. The water wash system is connected to the water supply system through the pipe 10 by means of a flexible hose.

To unload the pulp PAH from the tank into the ejector 20 through the pipe 12 is supplied with water at high speed and is discharged through the pipe 14 of the pulp.

The dust suppression system 21 is located in the upper part of the tank under the hatches and consists of pipes on which nozzles are installed directly in front of the hatches, providing a fan-shaped spray of water and the creation of a dust suppression curtain. The specified circuit is connected through a pipe 11 to the water supply system through a flexible hose.

The overflow 19 is a pipe connected to the overflow pipe 13. The pipe has a protective cap against dust. When filling the tank, water from the overflow pipe enters the tap and signals its filling.

The discharge pipes 15 are located at the bottom of the tank and serve to remove residual pulp and water from the flushing.

An example implementation of the invention:

The transport and technological container consists of a tank with a useful volume of 20 m ³ made of stainless steel and a steel frame in which the tank is fixed with clamps. The dimensions of the container are approximately 6000x2500x2500 mm. The container can be transported both by rail and by road. For example, PAHs are loaded at the sorbent manufacturer and delivered by road to water treatment plants for storage. In the period of an extraordinary situation at the water source, the container is installed at the place of its unloading. Flexible hoses are connected to the tank nozzles. To soak the sorbent and obtain pulp along circuit 8, hot water is supplied to the tank with a temperature of about 60 ° C, a flow rate of 3-6 m ³ / h. In the lower part of the pipes of the circuit, facing the bottom, there are holes located at an angle of 90 ° to each other, ensuring uniform wetting of the entire thickness of the powder. The degree of filling of the tank is controlled by overflow 13. The container can withstand 4-6 hours. Then, through circuit 7, air is supplied for 15-20 minutes, gradually increasing the flow rate to 175 m ³ / h, pressure, thereby intensively mixing the mixture. Cold water is supplied through circuit 11 to ensure dust suppression, which is sprayed through nozzles directly under the discharge hatches 3, suppressing the PAH dust cloud. After that, for unloading the pulp with an ejector, water is supplied to the circuit 10 and the valve of the pipe branch pipe 11 is opened. The remains of the pulp after unloading and washing the container are discharged through the nozzles 14 drain.

Thus, the claimed container simultaneously combines the functions of a container for transportation, storage of the soaking of the sorbent. The presence of systems inside the tank that ensure uniform mixing and wetting of PAHs makes it possible to efficiently prepare the sorbent to obtain a working solution.

Claims (3)

1. Transport and technological container for powdered sorbents, including a cylindrical tank, an ejector, and an air supply system, characterized in that the tank is made of corrosion-resistant material and is fixed in a rigid frame, hatches are provided on the side of the tank with lids, between which there are platforms, and at its end there is a system of nozzles, including nozzles for air supply, hot water supply to the tank, water supply for hydraulic washing, water supply for dust suppression, water supply for the ejector, overflow, discharge of pulp and emptying the tank, equipped with cranes, while the air supply system is located inside the tank in its bottom and is a circuit in the form of a collector and pipes in which holes are made from below; in addition, inside the tank, above the air supply circuit, there is a circuit for supplying hot water to the tank, made in the form of a manifold with pipes in which holes are made on both sides, as well as a water wash system located above them, consisting of a continuous supply pipe and a collector nozzles, as well as an overflow and an ejector with a pipe for pulp removal; in the upper part of the tank, directly under the hatches, a water supply circuit for dust suppression is installed, consisting of pipes with nozzles placed in pairs on them; moreover, each of the circuits and the ejector is connected to the corresponding pipe of the system. 2. The transport and technological container according to claim 1, characterized in that the nozzles of the system are closed with a safety casing. 3. The transport and technological container according to claim 1, characterized in that the sites have fences and stairs.

Images