CN116423666A - A dust-proof and dust-removal system for a concrete mixing plant - Google Patents

Abstract

The invention relates to the technical field of dust removal for mixing plants, and specifically discloses a dust-proof and dust-removal system for concrete mixing plants, including a material conveying system, a pneumatic dust-removal system and a water-based dust-removal system. Above, the sand hopper is located behind the dry aggregate hopper; the dust removal pipe is connected to the top of the mixing host, the aggregate buffer hopper and the powder buffer There are air intake and air outlet, the air intake is connected to the air blowing pipe, the air outlet of the air blowing pipe is installed on the rail car, and the rail car automatically moves on the spiral slideway; the spray head is installed on the inner upper part of the mixing main machine; The combination of the dust removal system and the water dust removal system has better dust removal effect and reduces production costs; the automatic cleaning of the fan of the dust removal bag reduces the number of shutdowns for cleaning, reduces maintenance costs, and improves production efficiency.

Description

A dust-proof and dust-removal system for a concrete mixing plant

technical field

The invention relates to the technical field of dust removal for mixing plants, in particular to a dust-proof and dust-removing system for concrete mixing plants.

Background technique

Concrete mixing plant is mainly composed of 5 major systems including mixing host, material weighing system, material conveying system, material storage system and control system and other auxiliary facilities. Compared with the aggregate measurement of the station, the floor aggregate measurement reduces four intermediate links, and the vertical feeding measurement saves the measurement time, thus greatly improving the production efficiency. The raw materials of the concrete mixing plant involve dry aggregates (stones and gravel, etc.) and powder materials (cement, etc.), so dust removal in the mixing plant is a very important issue. In the current dust removal methods and devices, it is generally used to add a dust removal cover to the outside of the conveyor belt, then connect it to the dust removal pipeline of the mixing host and buffer hopper, and finally connect it to the dust collector. This dust removal method is relatively simple, but the dust collector Scabs often form, which affects the dust removal effect. Cleaning the dust collector will affect production efficiency and increase maintenance costs. Therefore, it is urgent to design a dust-proof and dust-removal system for concrete mixing plants with multiple dust-removal methods and automatic cleaning to solve the problems of high maintenance costs and affecting production efficiency of existing dust-removal systems.

Contents of the invention

Aiming at the problems existing in the prior art, the object of the present invention is to provide a dust-proof and dust-removal system for a concrete mixing plant.

The technical solution adopted by the present invention to solve the technical problem is: a dust-proof and dust-removal system for a concrete mixing plant, including a mixing host, an aggregate buffer hopper and a powder buffer buffer, and the aggregate buffer hopper passes through an aggregate pipeline and a control valve Connected to the top of the mixing host, the powder buffer hopper is connected to the top of the mixing host through the powder pipeline and control valve, and also includes a material conveying system, a pneumatic dust removal system and a water dust removal system. The material conveying system is equipped with a flat conveyor belt and a dry aggregate hopper And the sand hopper, the dry aggregate hopper and the sand hopper are installed directly above the flat conveyor belt, and the sand hopper is located behind the dry aggregate hopper;

The pneumatic dust removal system is equipped with a dust collector and a dust removal pipeline. The dust removal pipeline is connected to the top of the mixing main engine, the aggregate buffer hopper and the powder material buffer hopper. The dust removal pipeline is connected to the dirty air chamber at the bottom of the dust collector. The air inlet and the air outlet, the air inlet is connected to the air blowing pipe, the air outlet of the air blowing pipe is installed on the rail car, and the rail car automatically moves on the spiral slideway;

The water dust removal system is equipped with a metering water tank and a spray head, and the spray head is installed on the inner upper part of the mixing main engine.

Specifically, the mixing host is provided with a water inlet, a concrete outlet and a dust inlet, the water inlet is connected to an external automatic metering water supply device, the automatic metering water supply device controls the amount of water added in the mixing host, and the concrete outlet is located at the mixing host At the bottom, the concrete that has been stirred is discharged from the concrete discharge port.

Specifically, a dry aggregate weighing hopper is provided below the dry aggregate hopper, and the dry aggregate weighing hopper measures and controls the feeding weight of the dry aggregate, and the dry aggregate weighing hopper is located above the flat conveyor belt. There is a sand weighing hopper under the sand hopper. The sand weighing hopper measures and controls the feeding weight of the sand. The sand weighing hopper is located above the flat conveyor belt, and the sand weighing hopper is located behind the dry aggregate weighing hopper. Sand with moisture on the flat conveyor belt covers the upper part of the dry aggregate.

Specifically, a feeding conveying belt is arranged at the rear of the flat conveying belt, and the feeding conveying belt is arranged obliquely upward, and the rear of the feeding conveying belt is connected to the aggregate buffer hopper.

Specifically, the material conveying system is also provided with a feeding auger, the bottom of the feeding auger is connected to the powder silo, and the upper part of the feeding auger is connected to the powder buffer hopper.

Specifically, a hollowed-out spiral slideway frame is installed at the connection between the clean air chamber and the dust-removing bag. The drive motor drives the rail car to reciprocate along the spiral slideway. A blowing hose is installed on the rail car. The blowing hose is connected to the blowing pipe. A fan is installed on the blowing pipe. The fan controls the blowing hose to blow into the dust bag. Air cleans dirt.

Specifically, a dust discharge port is provided at the bottom of the dust collector, and the dust discharge port is connected to the dust inlet of the mixing main machine through the dust discharge pipe for dust recovery and utilization.

Specifically, the metering water tank is connected to the reservoir through the water pump one, and the metering water tank is connected to the dust removal water pipe through the water pump two. Spray water inside to reduce dust.

A working method for a dust-proof and dust-removal system of a concrete mixing plant, comprising the following steps:

1) For the dust removal of the material conveying system, the dry aggregate weighing hopper and the sand weighing hopper are successively installed on the flat conveyor belt, so that the dry aggregate is first spread on the flat conveyor belt, and then the moisture-containing sand is spread on the dry aggregate , to dedust the dry aggregate through the moisture of the sand;

2) The feeding auger feeds between the powder silo and the powder buffer hopper, so that the powder is sealed and fed in the feeding auger;

3) Dust removal of the pneumatic dust removal system, the dust removal system absorbs the dust in the aggregate buffer hopper, powder buffer hopper and mixing host through the dust removal pipeline and enters the dirty air chamber of the dust collector, and the dust enters the clean air chamber through the dust removal bag and is discharged from the air outlet ;

4) The fan takes air from the clean air chamber, and the blowing hose on the rail car blows air into the dust removal bag to automatically clean the dust removal bag, and the rail car moves along the spiral slide to clean the dust removal bag at different positions;

5) For the dust removal of the water dust removal system, the control system of the mixing host divides a part of the water supply of the automatic metering water supply equipment to the metering water tank, and the metering water tank draws water corresponding to the water supply from the reservoir through the water pump. A certain amount of water passes through the water pump two to the sprinkler head, and the sprinkler head sprays the mixing host to reduce dust.

The present invention has the following beneficial effects:

The dust-proof and dust-removal system of the concrete mixing plant designed in the present invention adopts the combination of the pneumatic dust-removal system and the water-based dust-removal system, and the dust-removal effect is better, and the dust of the pneumatic dust-removal system is automatically recycled into the mixing main engine, realizing the recycling of raw materials and avoiding the waste of materials Waste and reduce production costs; the designed dust collector is equipped with a fan that automatically cleans the dust bag, keeps the dust bag clean, improves the service life of the dust bag, reduces the number of shutdowns for cleaning, reduces maintenance costs, and improves production efficiency; the design of the water dust removal system The water volume is automatically measured, which does not affect the total amount of water added in the mixing machine, ensuring the quality of the concrete; the designed feeding system adopts a new feeding form of sand covering the dry aggregate, which reduces the use of sealing covers and reduces the cost of use.

Description of drawings

Figure 1 is a schematic structural diagram of the dust control and dust removal system of a concrete mixing plant.

Figure 2 is a schematic structural view of the material conveying system.

Fig. 3 is a structural schematic diagram of the spiral slideway and the rail car.

In the figure: 1-mixing host, 1.1-water inlet, 1.2-concrete outlet, 1.3-dust inlet;

2-material conveying system, 2.1-flat conveying belt, 2.2-feeding conveying belt, 2.3-feeding auger, 2.4-dry aggregate hopper, 2.5-dry aggregate weighing hopper, 2.6-sand hopper, 2.7-sand weighing hopper;

3-Pneumatic dust removal system, 3.1-dust collector; 3.2-dust removal pipe, 3.3-clean air chamber, 3.4-air outlet, 3.5-ash discharge pipe, 3.6-air intake, 3.7-fan, 3.8-spiral slide, 3.9- subway.

4-water dust removal system, 4.1-reservoir, 4.2-metering water tank, 4.3-dust removal water pipe, 4.4-spray head;

5- Aggregate buffer hopper; 6- Powder buffer hopper.

Detailed ways

The technical solutions in the embodiments of the present invention will be described clearly and completely in further detail below in conjunction with the accompanying drawings in the 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.

As shown in Figure 1-3, a dust-proof and dust-removal system for a concrete mixing plant includes a mixing host 1, an aggregate buffer hopper 5 and a powder buffer hopper 6, and the aggregate buffer hopper 5 is connected to the mixing host through an aggregate pipeline and a control valve 1 top, the powder material buffer hopper 6 is connected to the top of the mixing host 1 through the powder material pipeline and the control valve. The mixing host 1 is provided with a water inlet 1.1, a concrete outlet 1.2 and a dust inlet 1.3. The water inlet 1.1 is connected to an external automatic metering water supply device, and the automatic metering water supply device controls the amount of water added in the mixer host 1.1. The concrete outlet 1.2 is located at the mixing At the bottom of the main machine 1, the concrete discharge port 1.2 discharges the stirred concrete.

A dust-proof and dust-removal system for a concrete mixing plant, which also includes a material conveying system 2, a pneumatic dust-removing system 3 and a water-dust removing system 4. The material conveying system 2 is provided with a flat conveying belt 2.1, a feeding conveying belt 2.2, a feeding auger 2.3, Dry aggregate hopper 2.4, dry aggregate weighing hopper 2.5, sand hopper 2.6 and sand weighing hopper 2.7, dry aggregate hopper 2.4 and sand hopper 2.6 are all installed directly above the flat conveyor belt 2.1, and sand hopper 2.6 is located on the dry bone The rear of the material hopper 2.4.

A dry aggregate weighing hopper 2.5 is provided below the dry aggregate hopper 2.4, and an electric control valve is provided at the lower part of the dry aggregate hopper 2.4. Material weight, the dry aggregate weighing hopper 2.5 adopts the existing load cell mode, and the electric control valve at the bottom is automatically opened after reaching a unit weight, and the dry aggregate weighing hopper 2.5 is positioned at the top of the flat conveyor belt 2.1. Sand hopper 2.6 below is provided with sand weighing hopper 2.7, and sand hopper 2.6 bottom is provided with electric control valve, and sand weighing hopper 2.7 measures and controls the loading weight of sand, and sand weighing hopper 2.7 adopts existing load cell mode, After reaching a unit weight, the electric control valve of the bottom is opened automatically, and the sand weighing hopper 2.7 is positioned at the top of the flat conveyor belt 2.1. The sand weighing hopper 2.7 is located behind the dry aggregate weighing hopper 2.5, and is used to cover the upper part of the dry aggregate with the sand with moisture on the flat conveyor belt 1, so as to avoid the dust discharge of the dry aggregate. The feeding system adopts sand A new feeding form covering dry aggregates reduces the use of sealing covers and reduces the cost of use.

The rear portion of the flat conveying belt 2.1 is provided with a feeding conveying belt 2.2, which adopts an inclined upward setting, and the rear portion of the feeding conveying belt 2.2 is connected to the aggregate buffer hopper 5, and the feeding conveying belt 2.2 conveys the mixed aggregate To the aggregate buffer hopper 5. The bottom of the feeding auger 2.3 is connected to the powder silo, the top of the feeding auger 2.3 is connected to the powder buffer hopper 6, and the feeding auger 2.3 transports the powder (cement, etc.) to the powder buffer hopper 6 in a sealed state.

Pneumatic dedusting system 3 is equipped with dust collector 3.1, dust removal pipeline 3.2, fan 3.7, spiral slideway 3.8 and rail car 3.9, dust removal pipeline 3.2 is connected to the top of mixing host 1, aggregate buffer hopper 5 and powder buffer hopper 6, and dust removal pipeline 3.2 The turbid air chamber connected to the bottom of the dust collector 3.1, the clean air chamber 3.3 on the upper part of the dust collector 3.1 is provided with an air intake port 3.6 and an air outlet port 3.4, the air intake port 3.6 is connected to the air blowing pipe, and the air outlet of the air blowing pipe is installed on the rail car 3.9 On the top, the rail car 3.9 automatically moves on the spiral slideway 3.8; a hollowed out spiral slideway frame is installed at the connection between the clean air chamber 3.3 and the dust bag, and the spiral slideway frame is provided with a spiral channel-shaped spiral slideway 3.8, and the hollow shape is different. Affect the rise of the dust removal gas. A rail car 3.9 is provided on the spiral slideway 3.8. A drive motor is installed on the rail car 3.9. The drive motor drives the rail car 3.9 to reciprocate along the spiral slideway 3.8. A blowing hose is installed on the rail car 3.9. The air blowing hose is connected to the air blowing pipeline, and fan 3.7 is installed on the air blowing pipeline, and the blower blower 3.7 controls the blowing hose to blow air to clean dirt in the dust removal cloth bag.

The bottom of the dust collector 3.1 is provided with an ash unloading port, and the ash unloading port is connected to the dust inlet 1.3 of the mixing main engine 1 through the ash unloading pipe 3.5, and is used for dust recovery and utilization. The dust collector 3.1 is equipped with a fan 3.7 for automatically cleaning the dust bag to keep the dust bag clean, improve the service life of the dust bag, reduce the number of shutdowns for cleaning, reduce maintenance costs, and improve production efficiency.

The water dedusting system 4 is provided with a reservoir 4.1, a metering water tank 4.2, a dedusting water pipe 4.3 and a shower head 4.4, and the shower head 4.4 is installed on the inner upper part of the mixing main machine 1. A water level sensor is installed in the metering water tank 4.2 to collect and count the water volume in the metering water tank 4.2. The metering water tank 4.2 is connected to the reservoir 4.1 through the water pump 1, and the metering water tank 4.2 is connected to the dust removal water pipe 4.3 through the water pump 2. The dust removal water pipe 4.3 is installed on the mixing host 1 The inner side of the dust removal water pipe 4.3 is equipped with a plurality of shower heads 4.4, and the shower heads 4.4 spray water into the mixing host 1 to reduce dust.

A working method for a dust-proof and dust-removal system of a concrete mixing plant, comprising the following steps:

1) For the dust removal of the material conveying system 2, the dry aggregate weighing hopper 2.5 and the sand weighing hopper 2.7 are successively installed on the flat conveying belt 2.1, so that the dry aggregate is first spread on the flat conveying belt 2.1, and then the sand containing moisture is laid On the dry aggregate, the dry aggregate is dedusted by the moisture of the sand;

2) The feeding auger 2.3 feeds materials between the powder silo and the powder buffer hopper 6, so that the powder is sealed and fed in the feeding auger 2.3;

3) Dust removal by the pneumatic dust removal system 3, the dust removal system 3 absorbs the dust in the aggregate buffer hopper 5, the powder buffer hopper 6 and the mixing host 1 through the dust removal pipeline 3.2 and enters the dirty air chamber of the dust collector 3.1, and the dust enters through the dust removal bag The clean air chamber 3.3 is discharged from the air outlet 3.4;

4) The fan 3.7 takes air from the clean air chamber 3.3, and the air blowing hose on the rail car 3.9 blows air into the dust removal bag to automatically clean the dust removal bag. cloth bag for cleaning;

5) For the dust removal of the water dust removal system 4, the control system of the stirring host 1 divides a part of the water supply of the automatic metering water supply equipment to the metering water tank 4.2, and the metering water tank 4.2 extracts water corresponding to the water supply from the reservoir 4.1 through the water pump 1 , the fixed amount of water in the metering water tank 4.2 leads to the spray head 4.4 through the water pump two, and the spray head 4.4 sprays dust in the mixing host 1.

The present invention is not limited to the above-mentioned embodiments, and anyone should know that any structural changes made under the inspiration of the present invention, and any technical solutions that are the same as or similar to the present invention, all fall within the protection scope of the present invention.

The technologies, shapes and construction parts not described in detail in the present invention are all known technologies.

Claims (9)

1. A dust-proof and dust-removal system for a concrete mixing plant, comprising a mixing host, an aggregate buffer hopper and a powder buffer hopper, the aggregate buffer hopper is connected to the top of the mixing host through an aggregate pipeline and a control valve, and the powder buffer hopper passes through the powder The material pipeline and the control valve are connected to the top of the mixing main engine, which is characterized in that it also includes a material conveying system, a pneumatic dedusting system and a water dedusting system. The material conveying system is equipped with a flat conveying belt, a dry aggregate hopper and a sand hopper, and the dry aggregate Both the hopper and the sand hopper are installed directly above the flat conveyor belt, and the sand hopper is located behind the dry aggregate hopper; The pneumatic dust removal system is equipped with a dust collector and a dust removal pipeline. The dust removal pipeline is connected to the top of the mixing main engine, the aggregate buffer hopper and the powder material buffer hopper. The dust removal pipeline is connected to the dirty air chamber at the bottom of the dust collector. The air inlet and the air outlet, the air inlet is connected to the air blowing pipe, the air outlet of the air blowing pipe is installed on the rail car, and the rail car automatically moves on the spiral slideway; The water dust removal system is equipped with a metering water tank and a spray head, and the spray head is installed on the inner upper part of the mixing main engine. 2. The dust-proof and dust-removal system of a concrete mixing plant according to claim 1, wherein the mixing main engine is provided with a water inlet, a concrete discharge port and a dust inlet, and the water inlet is connected to an external automatic metering water supply device for automatic metering. The water supply equipment controls the amount of water added in the mixing main machine. The concrete discharge port is located at the bottom of the mixing main machine, and the concrete after mixing is discharged from the concrete discharge port. 3. The dust-proof and dust-removal system of a concrete mixing plant according to claim 1, wherein a dry aggregate weighing hopper is arranged below the dry aggregate hopper, and the dry aggregate weighing hopper measures and controls the weight of the dry aggregate. Loading weight, the dry aggregate weighing hopper is located above the flat conveyor belt, and there is a sand weighing hopper below the sand hopper. The sand weighing hopper measures and controls the feeding weight of the sand. The sand weighing hopper is located above the flat conveyor belt. , The sand weighing hopper is located behind the dry aggregate weighing hopper, and is used to cover the upper part of the dry aggregate with sand with moisture on the flat conveyor belt. 4. The dust-proof and dust-removal system of a concrete mixing plant according to claim 1, wherein a feeding conveying belt is arranged at the rear of the flat conveying belt, and the feeding conveying belt adopts an inclined upward setting, and the rear part of the feeding conveying belt The whole part is connected to the aggregate buffer hopper. 5. The dust-proof and dust-removal system of a concrete mixing plant according to claim 1, wherein the material conveying system is also provided with a feeding auger, the bottom of the feeding auger is connected to a powder silo, and the bottom of the feeding auger The upper part is connected to the powder buffer hopper. 6. The dust-proof and dust-removal system of a concrete mixing plant according to claim 1, characterized in that, a hollow spiral slideway frame is installed at the junction of the clean air chamber and the dust-removing bag, and the spiral slideway frame is provided with a spiral channel-shaped A spiral slideway, a rail car is installed on the spiral slideway, a drive motor is installed on the rail car, the drive motor drives the rail car to reciprocate along the spiral slideway, an air blowing hose is installed on the rail car, and the air blowing hose is connected to the air blowing pipe. A fan is installed on the blowing pipe, and the fan controls the blowing hose to blow air into the dust bag to remove dirt. 7. The dust-proof and dust-removal system of a concrete mixing plant according to claim 1, characterized in that, the bottom of the dust collector is provided with an ash discharge port, and the ash discharge port is connected to the dust inlet of the mixing main engine through the ash discharge pipe for dust removal. recycling is in use. 8. The dust-proof and dust-removal system of a concrete mixing plant according to claim 1, wherein the metering water tank is connected to the reservoir through the first water pump, and the metering water tank is connected to the dust removal water pipe through the second water pump, and the dust removal water pipe is installed on the inner side of the mixing main machine , Multiple sprinklers are installed at the bottom of the dust removal pipe, and the sprinklers spray water into the mixing host to reduce dust. 9. The working method of the dust-proof and dust-removal system of a concrete mixing plant according to any one of claims 1-8, characterized in that it comprises the following steps: 1) For the dust removal of the material conveying system, the dry aggregate weighing hopper and the sand weighing hopper are successively installed on the flat conveyor belt, so that the dry aggregate is first spread on the flat conveyor belt, and then the moisture-containing sand is spread on the dry aggregate , to dedust the dry aggregate through the moisture of the sand; 2) The feeding auger feeds between the powder silo and the powder buffer hopper, so that the powder is sealed and fed in the feeding auger; 3) Dust removal of the pneumatic dust removal system, the dust removal system absorbs the dust in the aggregate buffer hopper, powder buffer hopper and mixing host through the dust removal pipeline and enters the dirty air chamber of the dust collector, and the dust enters the clean air chamber through the dust removal bag and is discharged from the air outlet ; 4) The fan takes air from the clean air chamber, and the blowing hose on the rail car blows air into the dust removal bag to automatically clean the dust removal bag, and the rail car moves along the spiral slide to clean the dust removal bag at different positions; 5) For the dust removal of the water dust removal system, the control system of the mixing host divides a part of the water supply of the automatic metering water supply equipment to the metering water tank, and the metering water tank draws water corresponding to the water supply from the reservoir through the water pump. A certain amount of water passes through the water pump two to the sprinkler head, and the sprinkler head sprays the mixing host to reduce dust.

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