RU238777U1 - Device for processing suspension waste - Google Patents

Abstract

The utility model relates to the field of thermal processing of suspension media, in particular to the thermal processing of suspension waste with the production of solid and gaseous processing products. The technical result of the utility model is the possibility of processing various suspension wastes, which makes it possible to reduce the amount of waste with the production of solid and gaseous products that can find application in various fields of industry. The technical result is achieved in that a device for processing suspension wastes, designed with the possibility of integration into a production line, comprises a housing equipped with a casing made of a heat-resistant material; a screw mechanism with intensifying inserts located inside the housing, the rotation of which is carried out by means of an electric drive with the possibility of adjusting the rotation speed by means of a regulator; heating elements located outside the housing along its length; a receiving hopper located at the beginning; an exhaust pipe for the gaseous phase and a discharge channel for the solid phase located at the end of the device. Moreover, the housing of the device for processing suspension wastes is designed with the possibility of changing the angle of inclination relative to the horizontal axis. In this case, the exhaust pipe is presented in the form of an exhaust duct located at the pipe outlet, and additional exhaust pipes evenly distributed throughout the middle section.

Description

The utility model relates to the field of thermal processing of suspension media, in particular to the thermal processing of suspension waste with the production of solid and gaseous processing products.

A prior art invention, "Device for Cleaning Oil-Contaminated Soil from Oil Products" (Patent No. 2297288, April 20, 2007), is known. The device comprises a screw conveyor housing, an auger housed within it, an auger drive, a loading hopper, a heater, an oil heating unit, oil supply lines, an oil collection tank, and a conveyor. The heater is oil-filled and consists of a tank filled with oil and an oil heating unit. The screw conveyor housing is housed within the oil heater tank.

A disadvantage of this device is the use of an oil heater, which heats the raw material to a temperature of 50-70°C. At this temperature, the raw material is only heated, not separated into solid and gaseous phases.

Also known is the "Induction thermal desorption unit for thermal neutralization of industrial oil-containing waste" (patent No. 2753356 dated August 13, 2021).

The installation comprises a feedstock feed unit, the outlet of which is connected to the inlet of a heat treatment module via a screw conveyor and/or a pipeline with a pump, wherein both feed lines to the heat treatment unit are equipped with a system for heating the transported material; the solid product outlet of the heat treatment module is connected to a processed material unloading unit, and the gaseous product outlet is connected to a gas cleaning unit, the outlets of which are connected to a condensation and separation unit, as well as to a non-condensed gas cleaning unit; the outlets of the condensation and separation unit are connected via a cooling system unit to storage tanks. The feedstock feed unit comprises a hopper containing at least two mixers and a working platform with a ladder. A feedstock level sensor is additionally installed on the upper part of the feedstock feed unit hopper. The unloading unit comprises a discharge hopper, a discharge auger, a controlled solid phase hopper, on the upper portion of which a processed material level sensor is installed, and a mixer is installed in the hopper, which is configured to control said level sensor, a rotary valve installed between the heat-treated material unloading unit and the unloading auger, configured to regulate the material level. The heat treatment module is designed as a set of sectional heat treatment chambers made of wear-resistant steel with a contactless annular local induction heating system and contains a jacket filled with a coolant, as well as a screw mixer, which ensures the movement of material to the unloading location of the heat-treated material, wherein the scrapers of the screw mixer contain an adjustment mechanism that minimizes the gap between the wall of the heat treatment module and the scraper, and the knives and scrapers of the screw mixer are made with a hard-alloy metal coating.

The disadvantage of this installation is the presence of a heater made in the form of a capacitive jacket filled with a liquid metal coolant, which significantly increases the operational requirements for both the material of the heater itself and the entire installation.

The objective of the utility model is to develop a device for processing suspension waste that eliminates the shortcomings of analogs.

The technical result of the utility model is the possibility of processing various suspension wastes, which allows for a reduction in the amount of waste with the production of solid and gaseous products that can find application in various industrial fields.

The technical result is achieved in that the device for processing suspension waste, designed with the possibility of integration into a production line, contains a housing equipped with a casing made of heat-resistant material; a screw mechanism with intensifying inserts, located inside the housing, the rotation of which is carried out by means of an electric drive with the possibility of adjusting the rotation speed by means of a regulator; heating elements located outside the housing along its length; a receiving bin located at the beginning; an exhaust pipe for the gaseous phase and a discharge channel for the solid phase, located at the end of the device.

In this case, the body of the device for processing suspension waste is designed with the possibility of changing the angle of inclination relative to the horizontal axis.

In this case, the exhaust pipe is presented in the form of an exhaust duct located at the pipe outlet, and additional exhaust pipes evenly distributed throughout the middle section.

The essence of the utility model is explained by the drawing.

Fig. 1 shows a diagram of a device for processing suspension waste.

The numbers in Fig. 1 indicate:

1 - electric drive;

2 - frequency rotation regulator;

3 - body;

4 - screw mechanism;

5 - receiving hopper;

6 - heating elements;

7 - exhaust pipe;

8 - discharge channel;

9 - intensifying inserts.

A device for processing suspension waste comprises a housing (3) adapted to change the angle of inclination relative to the horizontal axis and to be integrated into a production line, and equipped with a casing made of heat-resistant material (not shown in Fig. 1) to prevent heat loss. A receiving bin (5) is mounted at the beginning of the device, and a screw mechanism (4) is mounted inside the housing, the rotation of which is carried out by means of an electric drive (1) with the possibility of adjusting the rotation speed by means of a regulator (2). The screw mechanism is equipped with intensifying inserts (9). Heating of the waste is carried out by heating elements (6). At the outlet of the apparatus, a discharge channel (8) for the solid phase and an exhaust pipe (7) for the gaseous phase are mounted.

The device works as follows.

Suspension waste enters the receiving bin (5) of the device in measured doses. A screw mechanism (4) moves it, mixing, within the housing (3) toward the discharge channel (8). Inserts (9) on the screw mechanism (4) intensify the waste processing process as it moves by breaking up clumps of suspension waste, evenly distributing it along the housing walls for heating, and removing the resulting solid phase from the housing walls. This improves the quality of the suspension separation into solid and gaseous phases and accelerates the process.

Heating of the environment within the device is achieved through heat transfer from the heating elements (6) to the housing wall and then to the feedstock. The heating elements are required to maintain the temperature of the suspended waste within the housing above 100°C to ensure the evaporation of the moisture contained in the waste. During movement with constant mixing and heating within the housing (3), moisture evaporates, and the suspended waste separates into solid and gaseous phases. The solid phase enters the discharge channel (8) and is sent to storage, while the gaseous phase exits through the exhaust pipe (7) for further use. To intensify the moisture evaporation process within the device, the exhaust pipe (7) is designed as an exhaust duct located at the pipe outlet and additional exhaust nozzles evenly distributed throughout the middle section. This arrangement ensures efficient removal of generated vapors along the entire length of the device, reducing the partial pressure of water vapor and preventing condensation and the formation of stagnant zones, which, in turn, increases the evaporation rate.

An example of specific implementation.

The example below illustrates a variant of the claimed utility model, but does not limit it.

An example of a suspension waste is drilling waste, which is a complex mixture of drill cuttings (formed during oil well drilling) and spent drilling fluid. The latter, in turn, is a multicomponent system consisting of water, clay minerals, chemical reagents (including polymers and salts, etc.), drilled rock, and, potentially, petroleum hydrocarbons.

The component composition of drilling waste (DW) is presented in Table 1.

The drilling waste generated during the sludge cleaning stage enters the receiving bin (5), where it moves towards the discharge channel (8). The movement and mixing of the waste is achieved by the operation of the screw mechanism (4), on the blades of which intensifying inserts (9) are horizontally mounted. The speed of the waste movement within the device is regulated by the frequency controller (2), depending on the required time for heating the waste within the device to the temperature of moisture evaporation and the formation of a solid and gaseous phase at the outlet of the device. Also, to regulate the residence time of the waste within, the housing (3) is designed with the ability to adjust the angle of inclination. The intensifying inserts (9), when the screw mechanism (4) rotates, break up the uniform mass of drilling waste (lumps) and evenly distribute it along the walls of the housing, which facilitates the intensification of heat exchange during waste processing. Also, during the movement of the waste in the direction of the discharge channel, the resulting dried solid phase is scraped off the walls of the housing with the help of intensifying inserts (9), with which the screw mechanism is equipped.

Heating of the medium within the device is achieved by heat transfer from the heating elements (6) to the housing wall and then to the slurry waste. In this embodiment, the heating element is an annular ceramic heater mounted externally along the housing of the device. Electrical power is used to heat the annular ceramic heater to 500°C, and its temperature is maintained at this level. Under these conditions, the temperature within the device reaches over 100°C, causing the moisture in the drilling waste to evaporate, transforming into a gaseous phase and forming a solid residue. Upon exiting the device, the solid residue falls out of the discharge channel (8), and the gaseous phase exits through the exhaust pipe (7) for further use. The resulting steam is removed from the moment evaporation begins, thanks to the design of the exhaust pipe.

A second example of suspended waste is sewage sludge, which is generated during the treatment of domestic and industrial wastewater. This sludge is a complex mixture of organic and inorganic substances, microorganisms, and chemical compounds, requiring mandatory treatment before disposal. Proper treatment and disposal of sludge is important for environmental protection and can enable its use as a valuable resource, for example, in agriculture.

The component composition of sewage sludge is presented in Table 2.

The sewage sludge formed in the municipal treatment plant enters the receiving bin (5), where it moves in the direction of the discharge channel (8). The movement and mixing of the sludge is carried out similarly to the first example of the implementation of the utility model.

Heating of the medium within the device is achieved through heat transfer from the heating elements (6) to the housing wall and then to the slurry waste. In this embodiment, a steam jacket surrounding the housing serves as the heating element. It contains heating steam at a temperature of 220-250°C. Under these conditions, the temperature within the device reaches over 100°C, causing the moisture in the sewage sludge to evaporate, transforming into a gaseous phase and forming a solid residue. Upon exiting the device, the solid residue falls out of the discharge channel (8), and the gaseous phase exits through the exhaust pipe (7) for further use. The resulting steam is removed from the moment evaporation begins, thanks to the design of the exhaust pipe.

Based on the processing results, both drilling waste and wastewater sludge were separated into an inert solid residue (solid phase) and a liquid phase. Based on biotesting, the dry solid phase was assigned hazard class 5, meaning it is nonhazardous and can be used in a continuous cycle, such as for backfilling at landfills or at the source for backfilling pits. The use of a ceramic heater and steam heating does not limit the use of other known heater types.

Claims (3)

1. A device for processing suspension waste, designed with the possibility of integration into a production line, comprising a housing equipped with a casing made of heat-resistant material; a screw mechanism with intensifying inserts, located inside the housing, the rotation of which is carried out by means of an electric drive with the possibility of adjusting the rotation speed by means of a regulator; heating elements located outside the housing along its length; a receiving bin located at the beginning; an exhaust pipe for the gaseous phase and a discharge channel for the solid phase, located at the end of the device. 2. A device for processing suspension waste according to paragraph 1, characterized in that the housing is designed with the possibility of changing the angle of inclination relative to the horizontal axis. 3. A device for processing suspension waste according to paragraph 1, characterized in that the exhaust pipe is presented in the form of an exhaust duct located at the outlet of the pipe, and additional exhaust pipes evenly distributed throughout the middle section.