A solid waste-based cement soil preparation system

Abstract

The utility model discloses a solid waste-based cement soil preparation system, including a feeding device, a first magnetic separation device, a second magnetic separation device, a screening device, an air separation device, a crushing device, a construction slag recycled material storage device, a cement storage device, an admixture storage device, a water storage device, a first scrap iron storage device, a second scrap iron storage device, a light debris storage device and a stirring device; the feeding device is connected to the screening device, the screening device is connected to the air separation device, the screening device is connected to the construction slag recycled material storage device; the air separation device is connected to the crushing device, the crushing device is connected to the feeding device; the construction slag recycled material storage device, the cement storage device, the admixture storage device and the water storage device are respectively connected to the stirring device. The utility model can dispose of construction slag as a resource and use it in backfill engineering, solving the problems of high environmental pollution of construction slag, large project area, and high material transportation and operation and maintenance costs in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of solid waste treatment, in particular to a solid waste-based cement soil preparation system. Background Art

[0002] With the continuous acceleration of my country's urbanization process, the output of construction waste has continued to rise. Construction waste mainly includes construction slag, construction mud, construction waste, demolition waste and decoration waste. According to statistics, my country's construction waste currently accounts for more than 40% of the total urban waste, and the annual production of construction waste exceeds 2 billion tons, of which construction slag accounts for about 60% of the volume of construction waste. At present, most of the domestic construction slag is in a state of disorderly discharge or long-term storage due to its wide source, large volume and low resource attribute. A small part of the construction slag is simply replaced, which occupies a large area and has high transportation costs. In addition, there are strong safety and environmental risks in both the transportation process and the storage process.

[0003] A large amount of backfill materials such as concrete or bare soil are needed in the construction of projects such as road foundation and foundation pit backfill. However, due to the limitations of working space and the performance of the materials themselves, the density and later strength of bare soil backfill are difficult to guarantee. Concrete has good self-compactness, but the material cost is high and the later foundation excavation and maintenance are difficult.

[0004] Cement soil is a cement-based low-strength backfill material with high fluidity that can fill itself with little or no vibration to form a self-compacting structure. It can solve the problems of low construction efficiency and difficult to control backfill quality in various foundation trench backfill projects. The choice of raw materials is diverse, and it has the ability to absorb a large amount of construction waste. On the premise of meeting construction requirements, it can improve the resource utilization rate of construction waste and solve the problem of high material and labor costs. Utility Model Content

[0005] The purpose of the utility model is to provide a solid waste-based cement soil preparation system, which can dispose of engineering waste soil with a wide source, large volume and low resource attribute in a resource-based manner and use it in backfill projects, thereby solving the problems of high environmental pollution of engineering waste soil, large project footprint, and high material transportation and operation and maintenance costs existing in the prior art.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A solid waste-based cement soil preparation system, comprising a feeding device, a first magnetic separation device, a second magnetic separation device, a screening device, a wind separation device, a crushing device, a construction slag recycled material storage device, a cement storage device, an admixture storage device, a water storage device, a first scrap iron storage device, a second scrap iron storage device, a light debris storage device and a stirring device;

[0008] The feeding device is connected to the screening device via a first belt conveyor device, the first magnetic separation device is arranged above the first belt conveyor device, and the first magnetic separation device is connected to the first scrap iron storage device via a second belt conveyor device;

[0009] The screening device is connected to the air selection device through the third belt conveyor device, and the screening device is connected to the construction waste recycled material storage device through the vertical conveyor device; the air selection device is connected to the light debris storage device through the fourth belt conveyor device; the air selection device is connected to the crushing device through the fifth belt conveyor device, and the crushing device is connected to the feeding device through the sixth belt conveyor device; the second magnetic separation device is arranged above the sixth belt conveyor device, and the second magnetic separation device is connected to the second scrap iron storage device through the seventh belt conveyor device; the construction waste recycled material storage device is connected to the stirring device through the eighth belt conveyor device, the cement storage device is connected to the stirring device through a screw conveyor, the admixture storage device and the water storage device are connected to the stirring device through pipelines respectively, and the stirring device is connected with a conveying pump.

[0010] The feeding device is a chain plate feeder.

[0011] The first magnetic separation device and the second magnetic separation device are both suspended permanent magnetic self-unloading iron removers.

[0012] The screening device is a vibrating screening machine, which includes a screen box, a vibrator, a transmission device, and a supporting device. The screen box is composed of a screen frame and a screen surface, and the screen surface has a plurality of screen holes.

[0013] The sieve hole is 9.5mm.

[0014] The air separation device is a positive and negative pressure combined air separation device, the crushing device is an impact crusher, and the vertical conveying device is a bucket elevator.

[0015] The storage device for construction waste recycled materials is a steel silo, which consists of a silo, a level meter, a top negative pressure dust removal device and a discharge valve.

[0016] The cement storage device is a cement tank, which consists of a tank body, a level meter, a top negative pressure dust removal device and a discharge valve; the admixture storage device is a water storage tank, which consists of a tank body, a liquid level meter, an agitator and a valve; the water storage device is a water storage tank, which consists of a tank body, a liquid level meter and a valve.

[0017] The stirring device is a double-stage vibration stirring device.

[0018] The beneficial effects of the technical solution provided by the utility model are as follows: the solid waste-based cement soil preparation system of the utility model adopts the above technical solution, and the scrap iron in the engineering slag is selected by the first magnetic separation device, the light debris in the engineering slag is selected by the air separation device, the engineering slag with a larger volume is crushed by the crushing device, and the exposed scrap iron in the crushed engineering slag is selected by the second magnetic separation device. The crushed engineering slag is returned to the feeding device through the sixth belt conveyor device and merged with the engineering slag raw material again; the engineering slag recycled material is obtained by the screening device and enters the engineering slag recycled material storage device, and the cement in the cement storage device, the engineering slag recycled material in the engineering slag recycled material storage device, the admixture in the admixture storage device and the water in the water storage device are added to the stirring device in proportion for stirring, and after stirring, the solid waste-based cement soil is output through the conveying pump for backfilling engineering. The solid waste-based cement soil preparation system of the utility model adopts economical and environmentally friendly dry sorting technology, scientific process combination, efficient crushing and screening, and sufficient mixing to dispose of engineering slag with a wide source, large volume, and low resource attribute, and process and prepare solid waste-based cement soil, which can be widely used in backfill projects. The coordinated application of dry pretreatment of engineering slag and preparation of solid waste-based cement soil solves the problems of high environmental pollution, large project area, high material transportation and operation and maintenance costs in the existing technology, and improves the resource utilization rate of engineering slag. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a solid waste-based cement soil preparation system of the utility model.

[0020] Reference numerals:

[0021] 1. Feeding device; 2. First magnetic separation device; 3. Second magnetic separation device; 4. Screening device; 5. Air separation device; 6. Crushing device; 7. Storage device for construction waste recycled materials; 8. Cement storage device; 9. Admixture storage device; 10. Water storage device; 11. Stirring device; 12. First scrap iron storage device; 13. Second scrap iron storage device; 14. Light debris storage device. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0023] like Figure 1As shown, the solid waste-based cement soil preparation system of the utility model comprises a feeding device 1, a first magnetic separation device 2, a second magnetic separation device 3, a screening device 4, a wind separation device 5, a crushing device 6, a construction slag recycled material storage device 7, a cement storage device 8, an admixture storage device 9, a water storage device 10, a first scrap iron storage device 12, a second scrap iron storage device 13, a light debris storage device 14 and a stirring device 11;

[0024] The feeding device 1 is connected to the screening device 4 via a first belt conveyor, the first magnetic separation device 2 is arranged above the first belt conveyor, and the first magnetic separation device 2 is connected to the first scrap iron storage device 12 via a second belt conveyor;

[0025] The screening device 4 is connected to the air selection device 5 through the third belt conveyor, and the screening device 4 is connected to the construction waste recycled material storage device 7 through the vertical conveyor; the air selection device 5 is connected to the light debris storage device 14 through the fourth belt conveyor; the air selection device 5 is connected to the crushing device 6 through the fifth belt conveyor, and the crushing device 6 is connected to the feeding device 1 through the sixth belt conveyor; the second magnetic separation device 3 is arranged above the sixth belt conveyor, and the second magnetic separation device 3 is connected to the second scrap iron storage device 13 through the seventh belt conveyor; the construction waste recycled material storage device 7 is connected to the stirring device 11 through the eighth belt conveyor, the cement storage device 8 is connected to the stirring device 11 through a screw conveyor, the admixture storage device 9 and the water storage device 10 are respectively connected to the stirring device 11 through pipelines, and the stirring device 11 is connected with a conveying pump.

[0026] The feeding device 1 is a chain plate feeder.

[0027] The first magnetic separation device 2 and the second magnetic separation device 3 are both suspended permanent magnetic self-unloading iron removers.

[0028] The screening device 4 is a vibrating screening machine, which includes a screen box, a vibrator, a transmission device, and a supporting device. The screen box is composed of a screen frame and a screen surface. The screen surface has multiple screen holes. Specifically, the screen hole is 9.5 mm, which divides the construction waste into screened material with a particle size of >9.5 mm and screened material with a particle size of ≤9.5 mm.

[0029] The air separation device 5 is a positive and negative pressure combined air separation device, the crushing device 4 is an impact crusher, and the vertical conveying device is a bucket elevator.

[0030] The construction waste recycled material storage device 7 is a steel plate silo, which is composed of a silo, a material level meter, a top negative pressure dust removal device and a discharge valve. The undersize material screened by the screening device 4 is transported to the construction waste recycled material storage device 7 by a bucket elevator.

[0031] The cement storage device 8 is a cement tank, which consists of a tank body, a level meter, a top negative pressure dust removal device and a discharge valve; the admixture storage device 9 is a water storage tank, which consists of a tank body, a liquid level meter, an agitator and a valve; the water storage device 10 is a water storage tank, which consists of a tank body, a liquid level meter and a valve.

[0032] The stirring device 11 is a two-stage vibration stirring device.

[0033] The working process of the solid waste-based cement soil preparation system of the utility model is as follows: the construction slag is transported from the feeding device 1 to the screening device 4 through the first belt conveyor, the first magnetic separation device 2 selects the scrap iron in the construction slag passing through the first belt conveyor and sends it to the first scrap iron storage device 12 through the second belt conveyor; the screening device 4 screens the construction slag into oversize and undersize. The oversize enters the air selection device 5 through the third belt conveyor, the air selection device 5 selects the light debris in the construction slag and sends it to the light debris storage device 14 through the fourth belt conveyor; the construction slag enters the crushing device 6 through the fifth belt conveyor after the light debris is removed by the air selection device, the crushed construction slag is sent to the feeding device 1 through the sixth belt conveyor to merge with the construction slag raw material, the second magnetic separation device 3 selects the scrap iron in the construction slag exposed after being crushed by the crushing device 6 on the sixth belt conveyor, and sends it to the second scrap iron storage device 13 through the seventh belt conveyor.

[0034] The construction waste is screened by the screening device 4 and the sieves are sent into the construction waste recycled material storage device 7 through the vertical conveying device. The cement in the cement storage device 8, the construction waste recycled material in the construction waste recycled material storage device 7, the admixture in the admixture storage device 9 and the water in the water storage device 10 are added to the stirring device 11 in proportion for stirring. After stirring, the solid waste-based cement soil is output through the conveying pump.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A solid waste-based cement soil preparation system, characterized in that: It includes a feeding device, a first magnetic separation device, a second magnetic separation device, a screening device, a wind separation device, a crushing device, a construction slag recycled material storage device, a cement storage device, an admixture storage device, a water storage device, a first scrap iron storage device, a second scrap iron storage device, a light sundries storage device and a stirring device; The feeding device is connected to the screening device via a first belt conveyor device, the first magnetic separation device is arranged above the first belt conveyor device, and the first magnetic separation device is connected to the first scrap iron storage device via a second belt conveyor device; The screening device is connected to the air selection device through the third belt conveyor device, and the screening device is connected to the construction waste recycled material storage device through the vertical conveyor device; the air selection device is connected to the light debris storage device through the fourth belt conveyor device; the air selection device is connected to the crushing device through the fifth belt conveyor device, and the crushing device is connected to the feeding device through the sixth belt conveyor device; the second magnetic separation device is arranged above the sixth belt conveyor device, and the second magnetic separation device is connected to the second scrap iron storage device through the seventh belt conveyor device; the construction waste recycled material storage device is connected to the stirring device through the eighth belt conveyor device, the cement storage device is connected to the stirring device through a screw conveyor, the admixture storage device and the water storage device are connected to the stirring device through pipelines respectively, and the stirring device is connected with a conveying pump.

2. The solid waste-based cement soil preparation system according to claim 1, characterized in that: The feeding device is a chain plate feeder.

3. The solid waste-based cement soil preparation system according to claim 1, characterized in that: The first magnetic separation device and the second magnetic separation device are both suspended permanent magnetic self-unloading iron removers.

4. The solid waste-based cement soil preparation system according to claim 1, characterized in that: The screening device is a vibrating screening machine, which includes a screen box, a vibrator, a transmission device, and a supporting device. The screen box is composed of a screen frame and a screen surface, and the screen surface has a plurality of screen holes.

5. The solid waste-based cement soil preparation system according to claim 4, characterized in that: The sieve hole is 9.5mm.

6. The solid waste-based cement soil preparation system according to claim 1, characterized in that: The air separation device is a positive and negative pressure combined air separation device, the crushing device is an impact crusher, and the vertical conveying device is a bucket elevator.

7. The solid waste-based cement soil preparation system according to claim 1, characterized in that: The storage device for construction waste recycled materials is a steel silo, which consists of a silo, a level meter, a top negative pressure dust removal device and a discharge valve.

8. The solid waste-based cement soil preparation system according to claim 1, characterized in that: The cement storage device is a cement tank, which consists of a tank body, a level meter, a top negative pressure dust removal device and a discharge valve; the admixture storage device is a water storage tank, which consists of a tank body, a liquid level meter, an agitator and a valve; the water storage device is a water storage tank, which consists of a tank body, a liquid level meter and a valve.

9. The solid waste-based cement soil preparation system according to claim 1, characterized in that: The stirring device is a double-stage vibration stirring device.

Images