CN207918026U - Light Jie of one kind flowing air-transport system altogether - Google Patents

Abstract

A light-medium co-flow pneumatic conveying system, including a positive-pressure dense-phase pneumatic conveying system in which light-medium materials and conveyed materials are mixed together, and a negative-pressure suction pneumatic conveying system for light-medium materials; the positive-pressure dense-phase pneumatic conveying system includes high-pressure air Source, co-flow conveying pipeline, light medium feeding device and coarse and heavy conveying material feeding device, the outlet of the co-flow conveying pipeline is connected with a co-flow material collector, and the outlet of the co-flow material collector is connected with a light-heavy material separation The discharge port of the light and heavy material separator is connected with a light medium material material box and a coarse and heavy conveying material material box. The utility model has the advantages of low energy consumption for dense-phase pneumatic conveying, unbreakable materials, less pipe wall wear and wide application range of dilute-phase pneumatic conveying, and can be used for low-speed dense-phase conveying of large-grained, heavy, fragile and other materials that are difficult to convey , can effectively expand the scope of application of dense-phase pneumatic conveying, and can be widely used in industrial fields.

Description

A light medium co-flow pneumatic conveying system

technical field

The utility model belongs to the technical field of pneumatic conveying, in particular to a light medium co-flow pneumatic conveying system.

Background technique

Pneumatic conveying technology uses compressed air to realize short-distance transportation of non-cohesive bulk materials (such as flour, fly ash, wheat, etc.) in pipelines. Pneumatic conveying has the advantages of cleanliness, environmental protection, safety, and high degree of automation, but it also has disadvantages such as large power consumption, easy material breakage, pipeline blockage, and pipeline wear. At present, pneumatic conveying is generally used for conveying powder and fine particle bulk materials. For coarse and heavy materials with large particle size and density, due to the high air velocity required for conveying, most of them can only be conveyed in dilute phase, resulting in energy consumption, material crushing and Pipe wall wear is more serious. Low-speed dense-phase pneumatic conveying is an effective way to solve the above-mentioned problems of pneumatic conveying technology, but it has strict requirements on the properties of conveyed materials and conveying adjustment, and it is difficult to achieve low-speed dense-phase pneumatic conveying conditions for coarse and heavy materials.

Utility model content

In order to solve the deficiencies in the prior art, the utility model provides a low-speed dense-phase conveying that has a wide application range and can realize large-grained, heavy, and fragile materials that are difficult to convey, and can effectively reduce the energy consumption of conveying and reduce the pipeline A light-medium co-flow pneumatic conveying system that reduces abrasion and reduces the crushing of conveyed materials.

In order to solve the above technical problems, the utility model adopts the following technical scheme: a light-medium co-flow pneumatic conveying system, including a positive-pressure dense-phase pneumatic conveying system in which light-medium materials and conveyed materials are mixed and conveyed together, and a negative-pressure suction conveying of light-medium materials Pneumatic conveying system;

The positive pressure dense-phase pneumatic conveying system includes a high-pressure air source, a co-flow conveying pipeline, a light medium feeding device, and a coarse and heavy conveying material feeding device. The feeding port of the feeding device and the feeding port of the coarse and heavy conveying material feeding device are connected to the co-flow conveying pipeline, and the feeding port of the light medium feeding device is adjacent to the supplementary air inlet of the co-flow conveying pipeline The outlet of the co-flow material collector is connected with a co-flow material collector, the outlet of the co-flow material collector is connected with a light-heavy material separator, and the outlet of the light-heavy material separator is connected with a light-medium material bin and a coarse-heavy conveying material bin;

The suction port of the light medium material negative pressure suction pneumatic conveying system is connected with the light medium material material box, and the discharge port of the light medium material negative pressure suction pneumatic conveying system is connected with the feed port of the light medium material feeding device.

The high-pressure air source includes an air compressor and an air storage tank, and the air outlet of the air compressor is connected with the air inlet of the air storage tank.

The light medium feeding device includes a light medium material silo, a first light medium feeding pipe, a second light medium feeding pipe, a first light medium bunker pump and a second light medium bunker pump, the first light medium feeding pipe and The upper end feeding port of the second light medium feeding pipe is connected with the feeding port of the light medium material silo, the first light medium storage pump is arranged on the first light medium feeding pipe, and the second light medium storage pump is arranged on On the second light-medium feeding pipe, the lower port of the first light-medium feeding pipe, the lower port of the second light-medium feeding pipe and the co-flow conveying pipeline are convergingly connected; The first light medium tank pump, the second light medium tank pump, and the supplementary air inlet connection of the co-flow delivery pipeline.

The coarse and heavy conveying material feeding device includes a coarse and heavy conveying material silo, the discharge port of the coarse and heavy conveying material silo is connected with the co-flow conveying pipeline through the coarse and heavy material discharging pipe, and the coarse and heavy conveying material discharging pipe is provided with a rotary feeder.

The light medium material negative pressure suction pneumatic conveying system includes a vortex fan, an exhaust pipe, a light medium material collector, a light medium material negative pressure suction pipeline and the first dust collector, and the lower end of the light medium material collector. It is connected to the top of the light medium material silo, the air outlet of the exhaust duct is connected to the top of the light medium material collector, the air outlet of the exhaust duct is connected to the exhaust outlet of the vortex fan, and the air outlet of the vortex fan is connected to the air compressor connection, the first dust collector is set on the exhaust pipe, the suction port of the light medium material negative pressure suction pipeline is connected to the light medium material material box, and the discharge port of the light medium material negative pressure suction pipeline is connected to the light medium material aggregate connected to the upper side of the device.

The top of the co-flow material collector is connected with the air compressor through the air circulation return pipeline, and the second dust collector is arranged on the air circulation return pipeline.

It also includes an automatic control system; the automatic control system includes a control cabinet, a light medium material feed valve, a first pressure relief valve, a conveying pipeline intake valve, a warehouse pump intake valve, a second pressure relief valve, and a light medium material discharge valve and pressure transmitters;

The light medium material feed valve is set at the discharge port of the light medium material silo, and the light medium material discharge valve is set at the lower port of the first light medium material discharge pipe and the second light medium material discharge pipe. The pressure valve and the second pressure relief valve are respectively arranged on the first light medium warehouse pump and the second light medium warehouse pump, the intake valve of the conveying pipeline is arranged on the high pressure air pipeline, and the inlet valve of the warehouse pump is connected to the first light medium warehouse On the pump and the second light medium pump, pressure transmitters are arranged on the co-flow conveying pipeline and several are arranged along the conveying direction of the co-flow conveying pipeline;

The control cabinet is respectively connected with the light medium material feed valve, the first pressure relief valve, the intake valve of the conveying pipeline, the intake valve of the warehouse pump, the rotary feeder, the second pressure relief valve, the light medium material discharge valve and the light medium material feed valve through the control circuit. Pressure transmitter connection.

With the above technical scheme, the light-medium material is a material with low density, moderate particle size and easy fluidization. When conveying, it first enters the co-flow conveying pipeline and serves as the conveying medium for the coarse and heavy conveying materials; under the action of high-pressure air flow, When the coarse and heavy conveying materials enter the conveying system, the light-medium materials have been completely fluidized and form a low-speed dense-phase conveying flow state. The coarse-heavy conveying materials use the mixture of low-speed dense-phase conveying light-medium materials and airflow as the conveying medium, and are conveyed in co-flow Mixing in the pipeline forms a dense-phase positive pressure pneumatic conveying in which coarse and heavy conveying materials and light medium materials are mixed and conveyed together.

The positive pressure dense phase pneumatic conveying system is also equipped with a number of air supply pipelines connected to the co-flow conveying pipeline. The pneumatic conveying system and the negative pressure suction pneumatic conveying system together constitute a light-medium material circulation pneumatic conveying system, and the combined conveying of the two realizes the recycling of light-medium materials.

The first light medium storage pump and the second light medium storage pump are arranged in parallel, and the first light medium storage pump and the second light medium storage pump pass the light medium material feed valve, light medium material discharge valve, storage pump inlet valve, The combined effect of the first pressure relief valve and the second pressure relief valve realizes the circulation feeding, fluidization and sending of materials by the first light medium storage pump and the second light medium storage pump, and finally realizes the continuous dense phase pneumatic conveying of light medium materials.

Coarse and heavy conveying materials are fed through the rotary feeder to complete the continuous mixing of coarse and heavy conveying materials and light medium materials in the conveying pipeline, realizing co-flow conveying of coarse and heavy conveying materials and light medium materials; after the co-flow material collector completes the co-flow material collection The light-medium material is separated from the transported material through the light-heavy material separator. The separated light-medium material is placed in the light-medium material box and transported to the light-medium material silo by the negative pressure suction system to realize the recycling of the light-medium material. After separation The coarse and heavy conveying materials are stored in the coarse and heavy conveying material bin or transported to the target conveying place according to the conveying requirements.

The first dust collector and the second dust collector are respectively installed above the light medium material collector and the co-flow material collector to ensure that the conveying system is free from dust pollution hazards; the positive pressure dense phase pneumatic conveying system and the light medium material load The conveying air used in the pressure-suction pneumatic conveying system is a circular supply, that is, after the positive-pressure dense-phase pneumatic conveying system collects the material, the air is purified by the second dust collector and then returns to the air inlet of the air compressor, while the negative pressure of the material is lightened. The outlet of the vortex fan of the suction pneumatic conveying system is also connected with the air inlet of the air compressor. Through the automatic control of the control cabinet, the automatic and orderly delivery of the system can be realized.

Coarse and heavy conveying materials are fed through the rotary feeder to complete the continuous mixing of coarse and heavy conveying materials and light medium materials in the conveying pipeline, realizing co-flow conveying of coarse and heavy conveying materials and light medium materials; after the co-flow material collector completes the co-flow material collection , through the light-heavy material separator, the light-medium material is separated from the transported material. The separated light-medium material is transported to the light-medium material silo by the negative pressure suction system to realize the recycling of the light-medium material. The separated coarse and heavy transported material is transported according to the Request delivery to the target delivery location.

In summary, the utility model has the following advantages:

1. The utility model has the advantages of low energy consumption for dense-phase pneumatic conveying, unbreakable materials, less pipe wall wear and wide application range for dilute-phase pneumatic conveying. Phase conveying can effectively expand the scope of application of dense phase pneumatic conveying, and can be widely used in industrial fields.

2. The utility model includes a dense phase positive pressure co-flow conveying system and a light medium material negative pressure suction pneumatic conveying system, which can realize the recycling of light medium materials. At the same time, the air of the above two pneumatic conveying systems is purified and recovered, recycled, and the conveying system The environment is clean and friendly, meeting the requirements of green transportation.

3. All actuators of the utility model include air compressor, vortex fan, gas storage tank, light medium material feed valve, light medium material discharge valve, warehouse pump intake valve, pressure relief valve, and delivery pipeline intake valve , pressure transmitter, etc. are all controlled by the unified system of the control cabinet, which facilitates the orderly transportation of the conveying system and realizes the automatic operation of the conveying system.

4. The utility model has a wide range of applications, and can realize low-speed dense-phase pneumatic conveying of materials that are difficult to convey such as large-grained, heavy, and fragile materials, and can effectively reduce conveying energy consumption, reduce pipeline wear, and reduce conveying material breakage.

Description of drawings

Fig. 1 is the overall structural representation of the utility model;

Fig. 2 is a flow chart of pneumatic conveying of the utility model.

Detailed ways

As shown in Figure 1 and Figure 2, a light-medium co-flow pneumatic conveying system of the present invention includes a positive-pressure dense-phase pneumatic conveying system in which light-medium materials and conveyed materials are mixed and conveyed together, and a negative-pressure suction and delivery air force for light-medium materials Conveyor system;

The positive pressure dense-phase pneumatic conveying system includes a high-pressure air source, a co-flow conveying pipeline 21, a light medium feeding device, and a coarse-heavy conveying material feeding device. , the feeding port of the light medium feeding device and the feeding port of the coarse and heavy conveying material feeding device are connected to the co-flow conveying pipeline 21, and the feeding port of the light medium feeding device is adjacent to the supplementary air inlet of the co-flow conveying pipeline 21 , the outlet of the co-flow conveying pipeline 21 is connected with a co-flow material collector 24, the outlet of the co-flow material collector 24 is connected with a light-heavy material separator 25, and the outlet of the light-heavy material separator 25 is connected with a light medium Material hopper 26 and rough and heavy transport material hopper 27;

The suction port of the light medium material negative pressure suction pneumatic conveying system is connected with the light medium material material bin 26, and the discharge port of the light medium material negative pressure suction pneumatic conveying system is connected with the feed port of the light medium material feeding device.

The high-pressure air source includes an air compressor 1 and an air storage tank 2 , and the air outlet of the air compressor 1 is connected to the air inlet of the air storage tank 2 .

Light medium feeding device comprises light medium material silo 7, the first light medium feeding pipe 29, the second light medium feeding pipe 30, the first light medium bunker pump 10 and the second light medium bunker pump 17, the first light medium feeding pipe The upper end feeding ports of the medium feeding pipe 29 and the second light medium feeding pipe 30 are all connected with the feeding port of the light medium material silo 7, and the first light medium warehouse pump 10 is arranged on the first light medium feeding pipe 29 Above, the second light medium tank pump 17 is arranged on the second light medium feeding pipe 30, the lower port of the first light medium feeding pipe 29, the lower port of the second light medium feeding pipe 30 and the co-flow conveying pipeline 21 Junction connection. The air outlet of the air storage tank 2 is respectively connected with the air inlet of the first light medium warehouse pump 29, the second light medium warehouse pump 30, and the co-flow delivery pipeline 21 through the high-pressure air pipeline 28

The coarse and heavy conveying material feeding device includes a coarse and heavy conveying material silo 13, and the discharge port of the coarse and heavy conveying material silo 13 is connected with the co-flow conveying pipeline 21 through the coarse and heavy material discharging pipe 14, and the coarse and heavy material discharging pipe 14 is provided with a rotary feeding Device 15.

The light medium material negative pressure suction pneumatic conveying system includes a vortex fan 3, an exhaust duct 31, a light medium material collector 12, a light medium material negative pressure suction pipeline 19, a first dust collector 6, and a light medium material collector The lower end outlet of 12 is connected with the top of the light medium material silo 7, the air outlet of the suction duct 31 is connected with the top of the light medium material collector 12, and the air outlet of the suction duct 31 is connected with the suction port of the vortex fan 3 , the air outlet of the vortex blower 3 is connected with the air compressor 1, the first dust collector 6 is arranged on the exhaust pipe 31, and the suction port of the light medium material negative pressure suction pipeline 19 is connected with the top of the light medium material material box 26, The outlet of the light medium material negative pressure suction pipeline 19 is connected with the upper side of the light medium material collector 12 .

The top of the co-flow material collector 24 is connected to the air compressor 1 through the air circulation return pipeline 5 , and the second dust collector 23 is arranged on the air circulation return pipeline 5 .

The utility model also includes an automatic control system; the automatic control system includes a control cabinet 4, a light-medium material feed valve 8, a first pressure relief valve 9, a delivery pipeline intake valve 11, a warehouse pump intake valve 14, a second pressure relief valve Valve 16, light medium material discharge valve 18 and pressure transmitter 22;

The light medium material feed valve 8 is arranged at the discharge port of the light medium material silo 7, and the light medium material discharge valve 18 is arranged at the lower port of the first light medium material discharge pipe 29 and the second light medium material discharge pipe 30 At the position, the first pressure relief valve 9 and the second pressure relief valve 16 are respectively arranged on the first light medium warehouse pump 10 and the second light medium warehouse pump 17, and the delivery pipeline intake valve 11 is arranged on the high pressure air pipeline 28, and the warehouse The pump intake valve 14 is connected to the first light medium tank pump 10 and the second light medium tank pump 17, the pressure transmitter 22 is arranged on the co-flow delivery pipeline 21 and several indivual;

The control cabinet 4 is respectively connected with the light medium material feed valve 8, the first pressure relief valve 9, the intake valve 11 of the conveying pipeline, the intake valve 14 of the warehouse pump, the rotary feeder 15, and the second pressure relief valve 16 through the control line 20 , Light medium material discharge valve 18 and pressure transmitter 22 are connected.

The specific conveying process of the pneumatic conveying of coarse and heavy conveying materials is as follows: After the circulating air is compressed by the air compressor 1, it is stored in the air storage tank 2 and the pressure is stabilized. The high-pressure air pipeline 28 is input to the co-flow conveying pipeline 21 that has been fed stably and continuously; the coarse and heavy conveying materials are evenly and continuously added to the co-flow conveying pipeline 21 from the coarse and heavy conveying material silo 13 by the rotary feeder 15, and are fed by the common flow conveying pipeline 21 after reaching the conveying end. The flow material collector 24 realizes the separation of material and gas. After the high-pressure air is purified by the second dust collector 23, it is sent to the air compressor 1 for recycling through the air circulation return pipeline 5. After the coarse and heavy conveyed materials are separated by the light and heavy material separator 25, they are stored in The thick and heavy conveying material hopper 27 is for standby use, and the conveying material conveying is completed since then.

The specific transportation and recycling process of light medium materials is as follows. After the air is compressed by the air compressor 1, it is stored and stabilized in the air storage tank 2. The storage pump inlet valve 14 and the first pressure relief valve 9 controlled by the control cabinet 4, The light medium material enters the first light medium bin pump 10 and the second light medium bin pump 17 from the first light medium feeding pipe 29 and the second light medium feeding pipe 30 successively, and is released from the light medium material bin 7 to the The fluidized pressurization of the light medium material in the first light medium storage pump 10 and the second light medium storage pump 17, and then through the control cabinet 4, the light medium material feed valve 8, the delivery pipeline inlet valve 11 and the light medium material are unloaded. The material valve 18 is jointly controlled to realize the continuous dense-phase positive pressure delivery of light medium materials to the co-flow delivery pipeline 21, and control the delivery pipeline inlet valve 11 to supply air to the co-flow delivery pipeline 21 according to the needs of delivery, and after reaching the end of the delivery, the The co-flow material collector 24 realizes the separation of material and gas. After the air is purified by the second dust collector 23, it is sent to the air compressor 1 for recycling through the air circulation return pipeline 5. After the light-medium material is separated by the light-heavy material separator 25, it is stored in In the light medium material feed box 26; Simultaneously, the air in the light medium material negative pressure suction pipeline 19 is sucked by the vortex fan 3, realizes the light medium material negative pressure suction and feeds, and the light medium material is in the light medium material negative pressure The suction pipeline 19 is transported to the light medium material collector 12 to realize the separation of material and gas. After the air is purified by the first dust collector 6, it is discharged to the air compressor 1 by the suction pipeline 31 and the vortex fan 3 for recycling. The material is dropped into the light medium material silo 7 to realize automatic circulation conveying.

The specific control strategy of the automatic control system of the present utility model is as follows: the control cabinet 4 controls the loading pressure and unloading pressure of the air compressor 1, controls the stable pressure and fluctuation range of the gas storage tank 2, controls the opening and closing and flow characteristics of the vortex fan 3, and combines Control the opening and closing of the light medium material feed valve 8, the first pressure relief valve 9, the warehouse pump inlet valve 14, the second pressure relief valve 16 and the light medium material discharge valve 18 to realize the first light medium warehouse pump 10 and The circulating fluidization, pressurization and material sending of the second light medium pump 17, and at the same time control the opening and closing of the inlet valve 11 of the delivery pipeline according to the pressure signal transmitted by the pressure transmitter 22 on the co-flow delivery pipeline 21, and finally realize The light-medium material is continuously and stably conveyed by dense-phase positive pressure pneumatically, and all control elements are connected with the control cabinet 4 by the control circuit 20 . Finally, the unified control of the light-medium co-flow conveying system is completed, so that the light-medium materials and air are conveyed in an orderly cycle, and the automatic operation of the conveying system is realized.

This embodiment does not impose any formal restrictions on the shape, material, structure, direction, etc. of the present utility model. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present utility model belong to the utility model. The scope of protection of new technical solutions.

Claims (7)

1. A light-medium co-flow pneumatic conveying system, characterized in that: it includes a positive-pressure dense-phase pneumatic conveying system for mixing and conveying light-medium materials and conveyed materials, and a negative-pressure suction-feeding pneumatic conveying system for light-medium materials, The positive pressure dense-phase pneumatic conveying system includes a high-pressure air source, a co-flow conveying pipeline, a light medium feeding device, and a coarse and heavy conveying material feeding device. The feeding port of the feeding device and the feeding port of the coarse and heavy conveying material feeding device are connected to the co-flow conveying pipeline, and the feeding port of the light medium feeding device is adjacent to the supplementary air inlet of the co-flow conveying pipeline The outlet of the co-flow material collector is connected with a co-flow material collector, the outlet of the co-flow material collector is connected with a light-heavy material separator, and the outlet of the light-heavy material separator is connected with a light-medium material bin and a coarse-heavy conveying material bin; The suction port of the light medium material negative pressure suction pneumatic conveying system is connected with the light medium material material box, and the discharge port of the light medium material negative pressure suction pneumatic conveying system is connected with the feed port of the light medium material feeding device. 2. A light-medium co-flow pneumatic conveying system according to claim 1, characterized in that: the high-pressure air source includes an air compressor and an air storage tank, and the air outlet of the air compressor is connected to the air inlet of the air storage tank . 3. A light-medium co-flow pneumatic conveying system according to claim 2, characterized in that: the light-medium feeding device includes a light-medium material silo, a first light-medium feeding pipe, and a second light-medium feeding pipe , the first light-medium bin pump and the second light-medium bin pump, the upper feed ports of the first light-medium feeding pipe and the second light-medium feeding pipe are connected with the feeding port of the light-medium material silo, the first The light medium warehouse pump is arranged on the first light medium feeding pipe, the second light medium chamber pump is arranged on the second light medium feeding pipe, the lower port of the first light medium feeding pipe, the second light medium feeding pipe The lower port of the lower port is connected with the co-flow conveying pipeline; the air outlet of the gas storage tank is respectively connected with the supplementary air inlet of the first light medium chamber pump, the second light medium chamber pump and the co-flow conveying pipeline through the high-pressure air pipeline. 4. A light-medium co-flow pneumatic conveying system according to claim 3, characterized in that: the coarse and heavy conveying material feeding device includes a coarse and heavy conveying material silo, and the discharge port of the coarse and heavy conveying material silo is discharged through the coarse and heavy material The pipe is connected with the co-flow conveying pipeline, and a rotary feeder is arranged on the coarse and heavy material discharge pipe. 5. A light-medium co-flow pneumatic conveying system according to claim 4, characterized in that: the light-medium material negative pressure suction pneumatic conveying system includes a vortex fan, an exhaust pipe, a light-medium material collector, a light-medium material The material negative pressure suction pipeline and the first dust collector, the lower outlet of the light medium material collector is connected to the top of the light medium material silo, the exhaust port of the exhaust pipe is connected to the top of the light medium material collector, and the air is drawn The air outlet of the pipe is connected to the air outlet of the vortex fan, the air outlet of the vortex fan is connected to the air compressor, the first dust collector is installed on the air suction pipe, the suction port of the light medium material negative pressure suction pipe is connected to the light medium The material hopper is connected, and the discharge port of the light-medium material negative pressure suction pipeline is connected with the upper side of the light-medium material collector. 6. A light medium co-flow pneumatic conveying system according to claim 1, characterized in that: the top of the co-flow material collector is connected to the air compressor through the air circulation return pipeline, and the air circulation return pipeline is provided with a second 2. Dust collector. 7. A light-medium co-flow pneumatic conveying system according to claim 5, characterized in that: it also includes an automatic control system; the automatic control system includes a control cabinet, a light-medium material feed valve, a first pressure relief valve, a conveying Pipeline intake valve, silo pump intake valve, second pressure relief valve, light medium material discharge valve and pressure transmitter; The light medium material feed valve is set at the discharge port of the light medium material silo, and the light medium material discharge valve is set at the lower port of the first light medium material discharge pipe and the second light medium material discharge pipe. The pressure valve and the second pressure relief valve are respectively arranged on the first light medium warehouse pump and the second light medium warehouse pump, the intake valve of the conveying pipeline is arranged on the high pressure air pipeline, and the inlet valve of the warehouse pump is connected to the first light medium warehouse On the pump and the second light medium pump, pressure transmitters are arranged on the co-flow conveying pipeline and several are arranged along the conveying direction of the co-flow conveying pipeline; The control cabinet is respectively connected with the light medium material feed valve, the first pressure relief valve, the intake valve of the conveying pipeline, the intake valve of the warehouse pump, the rotary feeder, the second pressure relief valve, the light medium material discharge valve and the light medium material feed valve through the control circuit. Pressure transmitter connection.