CN110125155A - A kind of soil remediation drying pretreatment device - Google Patents

Abstract

The invention discloses a dry pretreatment device for soil restoration, which comprises a crushing box; the right side of the crushing box is fixedly connected with a heat preservation cylinder, and a heating cylinder is arranged in the heat preservation cylinder; a spiral conveying roller is arranged in the heating cylinder, The screw conveying roller includes a rotating shaft, a spiral blade and a nozzle; the rotating shaft is a hollow shaft, and nozzle pipes are evenly distributed on the rotating shaft, and the outer side of the rotating shaft is connected with an air inlet pipe through a rotary joint, and the air inlet pipe is connected to the exhaust gas of the heating and analyzing equipment. The discharge pipe is connected. The present invention is equipped with a feeding cover and a feeding impeller, so that the crushed soil enters the heating cylinder quantitatively, realizes uniform feeding, and ensures the drying effect of the soil; The material roller is used to horizontally turn and convey the soil in the heating cylinder while heating the soil with hot air to dry the soil evenly and efficiently, which is convenient for subsequent thermal desorption processing and improves the efficiency of thermal desorption.

Description

A dry pretreatment device for soil restoration

technical field

The invention relates to the field of soil restoration equipment, in particular to a drying pretreatment device for soil restoration.

Background technique

Thermal desorption is to heat the polluted medium and the organic pollutants contained in it to a sufficient temperature (usually heated to 150~540°C) through direct or indirect heat exchange, so that the organic pollutants can be volatilized or desorbed from the polluted medium. process of separation. Thermal desorption technologies are generally divided into two categories: low-temperature thermal desorption technologies that heat soil or sediment at a temperature of 150-315 °C; high-temperature thermal desorption technologies that reach a temperature of 315-540 °C. Contaminants currently involved in such remediation projects include: Benzene, Toluene, Ethylbenzene, Xylene or Petroleum Hydrocarbons (TPH).

However, when thermal desorption is performed on the soil, the soil itself contains a large amount of water. During thermal desorption, part of the heat is absorbed by the volatilization of water, which reduces the energy utilization efficiency and the effect of thermal desorption. The application provides a soil remediation pretreatment device, which can use the tail gas generated in the thermal desorption process to dry the soil to be treated after purification.

Contents of the invention

The object of the present invention is to provide a dry pretreatment device for soil remediation to solve the problems raised in the above-mentioned background technology.

To achieve the above object, the present invention provides the following technical solutions:

A dry pretreatment device for soil remediation, comprising a crushing box; the right side of the crushing box is fixedly connected with a heat preservation cylinder, and a heating cylinder is arranged in the heat preservation cylinder; a spiral feeding roller is arranged in the heating cylinder, and the spiral conveying roller It includes a rotating shaft, a spiral blade and a nozzle; the rotating shaft is a hollow shaft, and nozzle pipes are evenly distributed on the rotating shaft, and the outer side of the rotating shaft is connected with an air inlet pipe through a rotary joint, and the air inlet pipe is connected with the exhaust gas discharge pipe of the heating and analyzing equipment.

As a further solution of the present invention: the upper end of the crushing box is connected with a feeding hopper, and a group of crushing rollers are arranged in the crushing box, and the rotating shaft of the crushing rollers is rotationally connected with the inner wall of the crushing box and is connected with a first driving motor through a first transmission belt.

As a further solution of the present invention: a blanking cover is provided below the crushing roller, and the lower part of the blanking cover is arc-shaped; a blanking impeller is nested in the blanking cover, and the blanking impeller passes through the shaft and the inner wall of the blanking cover. The output shaft of the first driving motor is rotatably connected and connected through the second transmission belt; the lower part of the lower material cover is communicated with the lower material tube.

As a further solution of the present invention: the heating cylinder communicates with the feeding pipe.

As a further solution of the present invention: the rotating shaft is fixedly connected with a helical blade, the rotating shaft extends to the outside of the insulation cylinder and is connected to the output shaft of the second drive motor through the third transmission belt, and the end of the heating cylinder is connected to a discharge pipe.

As a further solution of the present invention: the upper end of the heating cylinder is connected with an outlet pipe, the upper part of the insulation cylinder is connected with an exhaust pipe, the exhaust pipe is connected with an external waste gas treatment device, and the lower part of the insulation cylinder is connected with a liquid discharge pipe.

As a further solution of the present invention: a ventilating net is provided at the connection between the outlet pipe and the heating cylinder.

Compared with the prior art, the beneficial effect of the present invention is: the present invention is equipped with a feeding cover and a feeding impeller, so that the crushed soil enters the heating cylinder quantitatively, realizes uniform feeding, and ensures the drying effect of the soil ;Through the spiral conveying roller equipped with spiral blades and nozzles, the soil in the heating cylinder is turned and conveyed horizontally while the hot air is heated, and the soil is evenly and efficiently dried, which is convenient for subsequent thermal desorption processing and improves pyrolysis. suction efficiency.

Description of drawings

Fig. 1 is the internal structure schematic diagram of drying pretreatment device for soil remediation;

Fig. 2 is the perspective view of the screw feed roller in the dry pretreatment device for soil remediation;

Fig. 3 is a perspective view of the feeding impeller in the drying pretreatment device for soil remediation.

In the figure: 1-crushing box; 2-feeding hopper; 3-crushing roller; 4-first drive belt; 5-first drive motor; 6-discharging cover; 7-discharging impeller; 9-insulation cylinder; 10-heating cylinder; 11-bolt feed roller; 12-rotation shaft; 13-spiral blade; 14-nozzle; 15-second drive belt; 16-second drive motor; 17-rotary joint ; 18-intake pipe; 19-air outlet pipe; 20-exhaust pipe;

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Example 1

Please refer to Fig. 1-3, in the embodiment of the present invention, a dry pretreatment device for soil remediation includes a crushing box 1; the upper end of the crushing box 1 is connected with a feeding hopper 2, through which the soil to be repaired is put into In the crushing box 1; a group of crushing rollers 3 are arranged in the crushing box 1, and the rotating shaft of the crushing rollers 3 is connected to the inner wall of the crushing box 1 and is connected to the first drive motor 5 through the first transmission belt 4. The first drive motor 5 It is electrically connected with an external power supply, and the first driving motor 5 drives the crushing roller 3 to rotate to squeeze and crush the soil, which is convenient for subsequent uniform heating treatment.

The bottom of the crushing roller 3 is provided with a blanking cover 6, and the lower part of the blanking cover 6 is arc-shaped; the blanking impeller 7 is nested in the blanking cover 6, and the blanking impeller 7 is connected to the inner wall of the blanking cover 6 through the rotating shaft. Rotate and connect and be connected with the output shaft of the first driving motor 5 by the second drive belt 15, the first driving motor 5 drives the blanking impeller 7 to rotate, and the soil falling into the blanking cover 5 is pushed and blanked; The lower part of the material cover 6 is connected with a feeding pipe 8, and the feeding impeller 7 allows a certain amount of soil to enter into the feeding pipe 8, so as to realize quantitative feeding and ensure the follow-up treatment effect.

The right side of the crushing box 1 is fixedly connected with a thermal insulation cylinder 9, and a heating cylinder 10 is arranged in the thermal insulation cylinder 9. The heating cylinder 10 communicates with the feeding pipe 8, and the soil enters the heating cylinder 10 in batches; A screw feed roller 11 is provided, and the screw feed roller 11 includes a rotating shaft 12, a spiral blade 13 and a spray pipe 14; the rotating shaft 12 is fixedly connected with a spiral blade 13, and the rotating shaft 12 extends to the outside of the insulation cylinder 9 and passes through The third transmission belt 22 is connected with the output shaft of the second drive motor 16, and the second drive motor 16 drives the screw feed roller 11 to rotate, pushing the soil to move to the right; the end of the heating cylinder 10 is connected with a discharge pipe 23, and the soil Discharge from the discharge pipe 23.

The rotating shaft 12 is a hollow shaft, and nozzle pipes 14 are evenly distributed on the rotating shaft 12, and the outer side of the rotating shaft 12 is connected with an air inlet pipe 18 through a rotary joint 17, and the air inlet pipe 18 is connected with the exhaust gas discharge pipe of the heating analysis equipment, and the purified The exhaust gas is passed into the rotating shaft 12 and ejected from the nozzle 14 to heat and dry the soil, so that the water in the soil is fully volatilized, which is convenient for the next step of heating and analysis, and the heat can be efficiently used to heat the soil. Organic matter, improve thermal desorption efficiency.

Example 2

The difference between this embodiment and Embodiment 1 is that the upper end of the heating cylinder 10 is connected with an air outlet pipe 19, and the connection between the air outlet pipe 19 and the heating cylinder 10 is provided with a ventilating net to prevent the soil from entering the air outlet pipe 19, and the volatilized moisture passes through the air outlet pipe 19. The air pipe 19 enters the heat preservation cylinder 9; the upper part of the heat preservation cylinder 9 is connected with an exhaust pipe 20, and the exhaust pipe 20 is connected with an external exhaust gas treatment device, and the lower part of the heat preservation cylinder 9 is connected with a liquid discharge pipe 21, and the partially condensed water is discharged from the The liquid pipe 21 discharges.

It should be noted that: the crushing roller in this application is the prior art, and the blanking cover, the blanking impeller, the screw feed roller, and the spray pipe are the innovation points of the application; by being provided with the blanking cover and the blanking impeller, the The crushed soil enters the heating cylinder quantitatively to achieve uniform feeding and ensure the drying effect of the soil; through the spiral conveying roller equipped with spiral blades and nozzles, the soil in the heating cylinder is horizontally turned and conveyed at the same time Heating with hot air can dry the soil evenly and efficiently, which is convenient for subsequent thermal desorption processing and improves the efficiency of thermal desorption.

It will be apparent to those skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only includes an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (7)

1. A dry pretreatment device for soil remediation, comprising a crushing box (1); it is characterized in that, the right side of the crushing box (1) is fixedly connected with a thermal insulation cylinder (9), and a heating cylinder (9) is provided inside the thermal insulation cylinder (9) cylinder (10); the heating cylinder (10) is provided with a screw feed roller (11), and the screw feed roller (11) includes a rotating shaft (12), a spiral blade (13) and a nozzle pipe (14); the The above-mentioned rotating shaft (12) is a hollow shaft, and nozzle pipes (14) are evenly distributed on the rotating shaft (12), and the outer side of the rotating shaft (12) is connected with an air intake pipe (18) through a rotary joint (17), and the air intake pipe (18) It is connected with the exhaust gas discharge pipe of the heating analysis equipment. 2. A dry pretreatment device for soil remediation according to claim 1, characterized in that, the upper end of the crushing box (1) is connected with a feeding hopper (2), and a group of crushing rollers are arranged in the crushing box (1) (3), the rotating shaft of the crushing roller (3) is rotationally connected with the inner wall of the crushing box (1) and is connected with a first driving motor (5) through a first transmission belt (4). 3. A dry pretreatment device for soil remediation according to claim 2, characterized in that a blanking cover (6) is provided below the crushing roller (3), and the lower part of the blanking cover (6) is arc-shaped The blanking impeller (7) is nested in the blanking cover (6), and the blanking impeller (7) is connected to the inner wall of the blanking cover (6) through a rotating shaft and connected to the second transmission belt (15). The output shaft of the first drive motor (5); the lower part of the lower material cover (6) is communicated with the lower material tube (8). 4. A dry pretreatment device for soil restoration according to claim 3, characterized in that the heating cylinder (10) communicates with the feeding pipe (8). 5. A dry pretreatment device for soil remediation according to claim 1, characterized in that, the rotating shaft (12) is fixedly connected with a helical blade (13), and the rotating shaft (12) extends to the insulation cylinder ( 9) The output shaft of the second driving motor (16) is connected to the outer side through the third transmission belt (22), and the end of the heating cylinder (10) is connected to a discharge pipe (23). 6. A dry pretreatment device for soil restoration according to claim 1, characterized in that, the upper end of the heating cylinder (10) is connected with an air outlet pipe (19), and the upper part of the heat preservation cylinder (9) is connected with an exhaust pipe (20), the exhaust pipe (20) communicates with the external waste gas treatment device, and the lower part of the insulation cylinder (9) communicates with a liquid discharge pipe (21). 7 . The dry pretreatment device for soil restoration according to claim 6 , characterized in that, a breathable net is provided at the connection between the outlet pipe ( 19 ) and the heating cylinder ( 10 ).