阅读说明：本技术 一种粉状物料浓相环保连续输送设备及其输送方法 (Concentrated phase environment-friendly continuous conveying equipment for powdery material and conveying method thereof ) 是由 张梦真 尹青亚 娄广辉 李银保 刘荣荣 常永 李文锋 李静 郭蕊 尹蕊 徐元盛 于 2021-08-13 设计创作，主要内容包括：本发明属于粉状物料浓相输送领域,具体涉及一种粉状物料浓相环保连续输送设备及其输送方法。连续输送设备包括原料仓,原料仓上连接有拉链机,拉链机末端连接有缓冲料仓,拉链机底部并排设有多个低压空气管道；缓冲料仓底部并联有两个浓相气力输送仓,两个浓相气力输送仓底部的输入端分别连接有两个高压空气管道,两个浓相气力输送仓底部的输出端分别连接有两条第二气固混合管；两条第二气固混合管回合至主输出管,再经第二分离器后连接至成品仓。本发明通过两个并行设置的浓相气力输送仓实现交替进料、浓相输送,使得粉状物料的输送过程能够连续进行,提高粉状物料的输送效率。(The invention belongs to the field of dense phase conveying of powdery materials, and particularly relates to a dense phase environment-friendly continuous conveying device and a conveying method of the dense phase environment-friendly continuous conveying device. The continuous conveying equipment comprises a raw material bin, a zipper machine is connected to the raw material bin, the tail end of the zipper machine is connected with a buffer bin, and a plurality of low-pressure air pipelines are arranged at the bottom of the zipper machine side by side; the bottom of the buffer bin is connected with two concentrated-phase pneumatic conveying bins in parallel, the input ends of the bottoms of the two concentrated-phase pneumatic conveying bins are respectively connected with two high-pressure air pipelines, and the output ends of the bottoms of the two concentrated-phase pneumatic conveying bins are respectively connected with two second gas-solid mixing pipes; and the two second gas-solid mixing pipes go round to the main output pipe and then are connected to the finished product bin after passing through the second separator. According to the invention, alternate feeding and concentrated phase conveying are realized through the two concentrated phase pneumatic conveying bins which are arranged in parallel, so that the conveying process of the powdery material can be continuously carried out, and the conveying efficiency of the powdery material is improved.)

1. The dense-phase environment-friendly continuous conveying equipment for the powdery materials is characterized by comprising a raw material bin for placing the powdery materials, wherein a zipper machine is connected to an outlet of the raw material bin, the tail end of the zipper machine is connected with a buffer bin, a plurality of low-pressure air branch pipes are arranged at the bottom of the zipper machine side by side, and the end parts of the low-pressure air branch pipes are connected with low-pressure air pipelines; a first air outlet pipe is arranged at the top of the zipper machine; the bottom of the buffer bin is connected with two concentrated-phase pneumatic conveying bins in parallel, valves are arranged on feeding pipes of the two concentrated-phase pneumatic conveying bins respectively, input ends of the bottoms of the two concentrated-phase pneumatic conveying bins are connected with two high-pressure air pipelines respectively, output ends of the bottoms of the two concentrated-phase pneumatic conveying bins are connected with two second gas-solid mixing pipes respectively, and valves are arranged on the two high-pressure air pipelines respectively; the two second gas-solid mixing pipes are converged to the main output pipe and then connected to the finished product bin after passing through the second separator.

2. The environmental-friendly continuous conveying equipment for the concentrated phase of the powdery material as claimed in claim 1, wherein a heating device is arranged on the low-pressure air pipeline.

3. The environment-friendly continuous concentrated-phase conveying equipment for powdery materials according to claim 1 or 2, wherein a shunt pipe is arranged at the tail end of the zipper machine, a valve is arranged on the shunt pipe, an outlet of the shunt pipe is connected with a temporary storage bin, the bottom of the temporary storage bin is connected to a material pipe between the zipper machine and a buffer bin, and a valve is arranged between the temporary storage bin and the material pipe; the top of the temporary storage bin is connected with a second air outlet pipe with a valve, the second air outlet pipe is connected to the first separator after being converged with the first air outlet pipe, and the bottom of the first separator is connected to the buffer bin.

4. The environment-friendly continuous conveying equipment for concentrated phases of powdery materials as claimed in claim 3, wherein the top of the buffer bin is connected to the first separator through a first gas-solid mixing pipe.

5. The environmental-friendly continuous conveying equipment for concentrated phases of powdery materials as claimed in claim 4, wherein the first separator is a one-stage dust remover, and the second separator is a two-stage dust remover.

6. The environmental-friendly continuous conveying equipment for the concentrated phase of the powdery material as claimed in claim 1, wherein ball valves are arranged on the plurality of low-pressure air branch pipes which are arranged side by side.

7. The dense phase environment-friendly continuous conveying method for the powdery material is characterized by comprising the following steps of:

(1) conveying the powdery material in the raw material bin into the zipper machine through a material pipe, and conveying low-pressure compressed air into the zipper machine by using a low-pressure air pipeline to enable the powdery material in the zipper machine to be in a suspension state;

(2) conveying the powdery material suspended in the zipper machine to a buffer bin through a material pipe;

(3) opening a valve on one of the feeding pipes at the bottom of the buffer bin to enable the powdery material in the buffer bin to be conveyed to a concentrated phase pneumatic conveying bin connected with the feeding pipe through the feeding pipe with the valve opened, closing the valve on the feeding pipe after feeding, simultaneously opening a valve on a high-pressure air pipeline connected with the concentrated phase pneumatic conveying bin, and introducing high-pressure compressed air into the concentrated phase pneumatic conveying bin through the high-pressure air pipeline to enable the powdery material to be conveyed to a finished product bin after sequentially passing through a second gas-solid mixing pipe, a main output pipe and a second separator which are connected with the concentrated phase pneumatic conveying bin under the action of the high-pressure compressed air; the feeding time is the same as the concentrated phase pneumatic conveying time;

(4) when the valve on the previous high-pressure air pipeline is opened for carrying out dense-phase pneumatic transmission, the valve on the previous feeding pipe is closed to stop feeding of the previous dense-phase pneumatic transmission bin, and meanwhile, the valve on the other feeding pipe is opened to enable the other dense-phase pneumatic transmission bin to carry out feeding, namely when the previous dense-phase pneumatic transmission bin carries out dense-phase pneumatic transmission, the other dense-phase pneumatic transmission bin carries out feeding operation; when the feeding of the other concentrated phase pneumatic conveying bin is finished, closing the valve on the other feeding pipe, simultaneously opening the valve on the other high-pressure air pipeline for concentrated phase pneumatic conveying, and simultaneously opening the valve on the previous feeding pipe to perform feeding operation on the previous concentrated phase pneumatic conveying bin, namely when the other concentrated phase pneumatic conveying bin performs concentrated phase pneumatic conveying, performing feeding operation on the previous concentrated phase pneumatic conveying bin;

(5) and (4) repeating the steps (3) to (4) to ensure that the two concentrated-phase pneumatic conveying bins periodically and alternately feed and convey the powdery material, thereby achieving the purpose of continuous conveying.

8. The environmental-friendly continuous conveying method for the dense phase of the powdery material as claimed in claim 7, characterized in that when the humidity of the powdery material does not meet the humidity requirement of dense phase conveying, the heating device is started to heat the low-pressure compressed air, so that the heated low-pressure compressed air dries the powdery material in the zipper machine to meet the requirement of dense phase conveying on the humidity of the material.

9. The method for dense-phase and environment-friendly continuous conveying of powdery materials according to claim 7, characterized in that when the flow of the powdery materials in the zipper machine suddenly increases and exceeds the load of the zipper machine, the valve on the shunt pipe is opened to convey the redundant powdery materials to the temporary storage bin through the shunt pipe, and after the flow of the powdery materials in the zipper machine is stable, the valve at the bottom of the temporary storage bin is opened to convey the powdery materials in the temporary storage bin to the buffer bin.

10. The dense-phase environment-friendly continuous conveying method for powdery materials according to claim 8 or 9, characterized in that the relative pressure of the low-pressure compressed air is 49.9KPa, and the solid-gas ratio in the zipper machine 2 is 8 Kg/Kg; the relative pressure of the high-pressure compressed air is 0.6 MPa; the solid-gas ratio in the concentrated phase pneumatic conveying bin is 40 Kg/Kg; the feeding time and the dense phase conveying time of the dense phase pneumatic conveying bin are both 300 s.

Technical Field

The invention belongs to the field of dense phase conveying of powdery materials, and particularly relates to a dense phase environment-friendly continuous conveying device and a conveying method of the dense phase environment-friendly continuous conveying device.

Background

In industries and fields mainly using powdery materials, the powdery materials are generally pneumatically conveyed by compressed air, for example, in a dense phase conveying mode with a high solid-gas ratio, the dense phase conveying has the advantages of long conveying distance and low power consumption, so the method is widely applied to conveying the powdery materials. The prior dense phase conveying is periodical and intermittent operation, namely, the next feeding and conveying process can be carried out after the feeding and conveying process of materials are completely finished every time, so that the conveying efficiency of the powdery materials is lower. In addition, the humidity of the powdery material is required to be not higher than 0.5% in the general dense phase conveying process, and the humidity of the material which is very easy to be affected by the weather is greatly affected, so that the moistened powdery material is attached to the wall of a pipeline in the dense phase conveying process of the powdery material in the humid weather, and the dense phase conveying of the powdery material is not facilitated.

Disclosure of Invention

The invention aims to provide the environment-friendly continuous conveying equipment for the concentrated phase of the powdery material, so as to improve the humidity of the powdery material and continuously convey the powdery material, thereby improving the conveying efficiency of the concentrated phase; the invention provides a high-efficiency and environment-friendly concentrated phase environment-friendly continuous conveying method for powdery materials.

Based on the purpose, the invention adopts the following technical scheme: a dense-phase environment-friendly continuous conveying device for powdery materials comprises a raw material bin for placing the powdery materials, wherein a zipper machine is connected to an outlet of the raw material bin, the tail end of the zipper machine is connected with a buffer bin, a plurality of low-pressure air branch pipes are arranged at the bottom of the zipper machine side by side, and the end parts of the low-pressure air branch pipes are connected with low-pressure air pipelines; a first air outlet pipe is arranged at the top of the zipper machine; the bottom of the buffer bin is connected with two concentrated-phase pneumatic conveying bins in parallel, the feeding pipes of the two concentrated-phase pneumatic conveying bins are respectively provided with a valve, the input ends of the bottoms of the two concentrated-phase pneumatic conveying bins are respectively connected with two high-pressure air pipelines, and the output ends of the bottoms of the two concentrated-phase pneumatic conveying bins are respectively connected with two second gas-solid mixing pipes; valves are respectively arranged on the two high-pressure air pipelines; and the two second gas-solid mixing pipes go round to the main output pipe and then are connected to the finished product bin after passing through the second separator.

Furthermore, a heating device is arranged on the low-pressure air pipeline, and a low-pressure compressed air device is connected to the initial end of the low-pressure air pipeline.

Furthermore, the starting ends of the two high-pressure air pipelines are connected with a compressed air storage tank, and the compressed air storage tank is connected with a high-pressure compressed air device.

Furthermore, the compressed air storage tank is also connected with a high-pressure air branch pipe, the high-pressure air branch pipe and the main output pipe are arranged in parallel, and a plurality of ball valves are arranged between the high-pressure air branch pipe and the main output pipe.

Further, the heating device is a resistance wire heating device.

Furthermore, a shunt pipe is arranged at the tail end of the zipper machine, a valve is arranged on the shunt pipe, a temporary storage bin is connected to the outlet of the shunt pipe, the bottom of the temporary storage bin is connected to a material pipe between the zipper machine and the buffer bin, and a valve is arranged between the temporary storage bin and the material pipe; the top of the temporary storage bin is connected with a second air outlet pipe with a valve, the second air outlet pipe is connected to the first separator after being converged with the first air outlet pipe, and the bottom of the first separator is connected to the buffer bin.

Further, the top of the buffer bin is connected to the first separator through a first gas-solid mixing pipe.

Furthermore, the first separator is a first-stage dust remover, and the second separator is a second-stage dust remover; the dust collectors in the first separator and the second separator are both connected with fans; the first separator and the second separator are used for filtering and dedusting the dust-containing gas, so that dust pollution in the dense phase conveying process is avoided.

Furthermore, ball valves are arranged on a plurality of low-pressure air branch pipes which are arranged side by side.

A dense phase environment-friendly continuous conveying method for powdery materials comprises the following steps:

(1) powdery materials in the raw material bin are conveyed into the zipper machine through the material pipe, and low-pressure compressed air is conveyed into the zipper machine through the low-pressure air branch pipe, so that the powdery materials in the zipper machine are in a suspension state.

(2) The powder material suspended in the zipper machine is conveyed to the buffer bin through the material pipe.

(3) Opening a valve on one of the feeding pipes at the bottom of the buffer bin to enable the powdery material in the buffer bin to be conveyed to a concentrated phase pneumatic conveying bin connected with the feeding pipe through the feeding pipe with the valve opened, closing the valve on the feeding pipe after feeding, simultaneously opening a valve on a high-pressure air pipeline connected with the concentrated phase pneumatic conveying bin, and introducing high-pressure compressed air into the concentrated phase pneumatic conveying bin through the high-pressure air pipeline to enable the powdery material to be conveyed to a finished product bin after sequentially passing through a second gas-solid mixing pipe, a main output pipe and a second separator which are connected with the concentrated phase pneumatic conveying bin under the action of the high-pressure compressed air; and the feeding time is the same as the dense phase pneumatic conveying time.

(4) When the valve on the previous high-pressure air pipeline is opened for carrying out dense-phase pneumatic transmission, the valve on the previous feeding pipe is closed to stop feeding of the previous dense-phase pneumatic transmission bin, and meanwhile, the valve on the other feeding pipe is opened to enable the other dense-phase pneumatic transmission bin to carry out feeding, namely when the previous dense-phase pneumatic transmission bin carries out dense-phase pneumatic transmission, the other dense-phase pneumatic transmission bin carries out feeding operation; and when the feeding of the other concentrated phase pneumatic conveying bin is finished, closing the valve on the other feeding pipe, simultaneously opening the valve on the other high-pressure air pipeline for concentrated phase pneumatic conveying, and simultaneously opening the valve on the previous feeding pipe to perform feeding operation on the previous concentrated phase pneumatic conveying bin, namely, when the other concentrated phase pneumatic conveying bin performs concentrated phase pneumatic conveying, performing feeding operation on the previous concentrated phase pneumatic conveying bin.

(5) And (4) repeating the steps (3) to (4) to ensure that the two concentrated-phase pneumatic conveying bins periodically and alternately feed and convey the powdery material, thereby achieving the purpose of continuous conveying.

Further, when the humidity of the powdery material does not meet the humidity requirement of dense phase conveying, if the humidity of the powdery material is 3% or higher than 3%, the heating device is started to heat the low-pressure compressed air, so that the heated low-pressure compressed air is used for drying the powdery material in the zipper machine, and the humidity of the powdery material is reduced to 0.5% so as to meet the requirement of dense phase conveying on the humidity of the material.

Further, when the flow of powdery material suddenly increased and exceeded the zipper machine load in the zipper machine, open the valve on the shunt tubes for unnecessary powdery material passes through the shunt tubes and carries to temporarily storing the storehouse, treat the steady back of flow of powdery material in the zipper machine, open the valve of temporarily storing the bottom of the storehouse, carry the powdery material in the storehouse to buffering feed bin temporarily.

Further, the relative pressure of the low-pressure compressed air is 49.9KPa, and the solid-gas ratio in the zipper machine 2 is 8 Kg/Kg; the relative pressure of the high-pressure compressed air is 0.6 MPa; the solid-gas ratio in the concentrated phase pneumatic conveying bin is 40 Kg/Kg; the feeding time and the dense phase conveying time of the dense phase pneumatic conveying bin are both 300 s.

Further, in the process that the powdery material is conveyed to the buffer bin through the zipper machine, dust-containing gas is filtered and reduced through the first separator; and in the process of conveying the powdery materials to the finished product bin through the two concentrated-phase pneumatic conveying bins, filtering dust-containing gas through a second separator for dust reduction.

Compared with the prior art, the invention has the following beneficial effects:

(1) the invention adopts the technical scheme that two concentrated phase pneumatic conveying bins are arranged at the bottom of a buffer bin in parallel, valves are respectively arranged on the feeding pipes of the two concentrated phase pneumatic conveying bins, the input ends of the bottoms of the two concentrated phase pneumatic conveying bins are respectively connected with two high-pressure air pipelines, the output ends of the bottoms of the two concentrated phase pneumatic conveying bins are respectively connected with two second gas-solid mixing pipes, and the valves are respectively arranged on the two high-pressure air pipelines, so that the feeding pipes and the high-pressure air pipelines which are respectively connected with the two concentrated phase pneumatic conveying bins are independently controlled, the two concentrated phase pneumatic conveying bins can alternately carry out feeding and high-pressure conveying operations, and the conveying process of the powdery material can be continuously carried out, thereby solving the problems that the existing single concentrated phase conveying is gap conveying and the conveying efficiency is low.

(2) According to the invention, the heating device is arranged on the low-pressure air pipeline, and the low-pressure compressed air is heated by the heating device, so that after the heated low-pressure compressed air and the powdery material are mixed in the zipper machine, the powdery material can be dried, the humidity of the powdery material is reduced, the powdery material is prevented from being attached to the inner wall of the pipeline due to high humidity in the conveying process, and the smooth concentrated phase conveying is facilitated.

(3) According to the invention, the plurality of low-pressure air branch pipes are arranged at the bottom of the zipper machine side by side, so that low-pressure compressed air in the zipper machine can be divided and fed, the zipper blocking phenomenon of the zipper machine is effectively reduced, and the conveying efficiency of the zipper machine is improved.

(4) According to the invention, the shunt pipe is arranged at the tail end of the zipper machine, the valve is arranged on the shunt pipe, the outlet of the shunt pipe is connected with the temporary storage bin, when the flow of the powdery material in the zipper machine is suddenly increased to exceed the load of the zipper machine, the valve on the shunt pipe is opened, so that the redundant powdery material can enter the temporary storage bin through the shunt pipe, and the overload operation of the zipper machine is avoided; store the storehouse bottom temporarily and be connected to on the material pipe between zip fastener machine and the buffering feed bin, store temporarily and be equipped with the valve between storehouse and the material pipe, after the flow of the powdery material in the zip fastener machine is steady, open the valve of storing the storehouse bottom temporarily, carry the powdery material in the storehouse to buffering feed bin temporarily to avoid the waste of powdery material.

(5) The top of the temporary storage bin is connected with a second air outlet pipe, the second air outlet pipe is connected to the first separator after being converged with the first air outlet pipe, so that dust-containing gas conveyed by the first air outlet pipe and the second air outlet pipe is filtered and dusted by the first separator in the process of conveying the powdery material to the buffer bin through the zipper machine; a second separator is arranged between the main output pipe and the finished product bin, so that dust-containing gas conveyed by the main pipe is filtered and reduced by the second separator in the process of conveying the powdery material to the finished product bin through the two concentrated-phase pneumatic conveying bins; the first separator and the second separator are used for filtering and dedusting the dust-containing gas, so that dust pollution in the dense phase conveying process is avoided.

(6) The invention also adopts the technical scheme that the output end of the compressed air storage tank is connected with the high-pressure air branch pipe, the high-pressure air branch pipe is arranged in parallel with the main output pipe, a plurality of ball valves are arranged between the high-pressure air branch pipe and the main output pipe, and the high-pressure air branch pipe can perform dispersed gas injection to the main output pipe by opening the ball valves connected with the high-pressure air branch pipe, so that the blockage of the main output pipe is avoided, and the conveying efficiency of the powdery material is improved.

In conclusion, the alternating feeding and dense phase conveying are realized through the two dense phase pneumatic conveying bins which are arranged in parallel, so that the conveying process of the powdery material can be continuously carried out, and the conveying efficiency of the powdery material is improved; by arranging the temporary storage bin, excessive powdery materials in the zipper machine are shunted and temporarily stored, so that the zipper machine is prevented from running under overload; through setting up first separator and second separator, effectively avoid producing dust pollution among the powdery material transportation process.

Drawings

Fig. 1 is a schematic view of the conveying equipment and the corresponding conveying process of the invention.

In the figure: 1. a raw material bin; 2. a zipper machine; 3. a buffer bin; 4. a low pressure air conduit; 5. a low pressure air manifold; 6. a first air outlet pipe; 7. a second air outlet pipe; 8. a first concentrated phase pneumatic conveying bin; 9. a second concentrated phase pneumatic conveying bin; 10. a high pressure air conduit; 11. a first gas-solid mixing tube; 12. a second gas-solid mixing pipe; 13. a main output pipe; 14. a finished product warehouse; 15. a heating device; 16. a shunt tube; 17. a temporary storage bin; 18. a first material pipe; 19. a second material pipe; 20. a third material pipe; 21. a fourth material pipe; 22. a feed pipe; 23. a dust remover; 24. a fan; 25. a low pressure compressed air device; 26. a high pressure compressed air device; 27. a main high pressure air conduit; 28. a compressed air storage tank; 29. a third gas-solid mixing pipe; 30. a high pressure air branch pipe.

The valves in the figure are numbered: d1, a first butterfly valve; d2, a second butterfly valve; d3, a third butterfly valve; d4, a fourth butterfly valve; d5, a fifth butterfly valve; d6, a sixth butterfly valve; d7, a seventh butterfly valve; d8, an eighth butterfly valve; d9, ninth butterfly valve; AD1, first pneumatic butterfly valve; AD2, second pneumatic butterfly valve; AD3, third pneumatic butterfly valve; AD4, fourth pneumatic butterfly valve; BAV, ball valve.

Detailed Description

Example 1

The utility model provides a continuous conveying equipment of likepowder material dense phase environmental protection, including the former feed bin 1 of placing likepowder material, be connected with in the export of former feed bin 1 and draw zipper machine 2, the end of drawing zipper machine 2 is connected with buffering feed bin 3 through first material pipe 18, there are two dense phase pneumatic conveying storehouses buffering feed bin 3 bottom through two inlet pipe 22 parallel connection, the input of two dense phase pneumatic conveying storehouse bottoms is connected with two high-pressure air pipeline 10 respectively, the output of two dense phase pneumatic conveying storehouse bottoms is connected with two second gas-solid hybrid tubes 12 respectively, two second gas-solid hybrid tubes 12 rounds are to main output tube 13, be connected to finished product storehouse 14 behind the second separator again. The feeding pipe 22 and the high-pressure air pipeline 10 which are connected with the two concentrated-phase pneumatic conveying bins are separately controlled, so that the two concentrated-phase pneumatic conveying bins can alternately carry out feeding and high-pressure conveying operations, the conveying process of the powdery material can be continuously carried out, and the problems that the existing single concentrated-phase conveying is gap conveying and low conveying efficiency are solved.

Draw zipper machine 2 bottom to be equipped with a plurality of low pressure air branch pipes 5 side by side, all be equipped with ball valve BVA on every low pressure air branch pipe 5 for draw zipper machine 2 interior low pressure compressed air to shunt and admit air, effectively reduce zipper machine 2's card chain phenomenon, improve zipper machine 2's conveying efficiency. The end part of the low-pressure air branch pipe 5 is connected with a low-pressure air pipeline 4, and the starting end of the low-pressure air pipeline 4 is connected with a low-pressure compressed air device 25 through a first butterfly valve D1; the low-pressure air pipeline 4 is provided with a heating device 15, and the heating device 15 can adopt a resistance wire heating device or other common heating devices; utilize heating device 15 to heat low pressure compressed air for after low pressure compressed air after the heating mixes the back with powdery material in zip fastener machine 2, can carry out drying process to powdery material, reduce powdery material's humidity, avoid in transportation process powdery material because of humidity height attached to the pipeline inner wall, the going on smoothly of being convenient for dense phase and carrying.

A first air outlet pipe 6 is arranged at the top of the zipper machine 2, and a second butterfly valve D2 is arranged on the first air outlet pipe 6; the tail end of the zipper machine 2 is provided with a flow dividing pipe 16, the flow dividing pipe 16 is provided with a third butterfly valve D3, the outlet of the flow dividing pipe 16 is connected with a temporary storage bin 17, the bottom of the temporary storage bin 17 is connected to a first material pipe 18 between the zipper machine 2 and the buffer bin 3, and a fifth butterfly valve D5 is arranged between the temporary storage bin 17 and the material pipe; the top of the temporary storage bin 17 is connected with a second air outlet pipe 7, the second air outlet pipe 7 is provided with a fourth butterfly valve D4, the second air outlet pipe 7 is connected to the first separator after being converged with the first air outlet pipe 6, and the bottom of the first separator is connected to the buffer bin 3 through a second material pipe 19; the top of the buffer bin 3 is connected to the first separator through a first gas-solid mixing pipe 11, and a sixth butterfly valve D6 is arranged on the first gas-solid mixing pipe 11.

Through setting up shunt tubes 16 at 2 ends of zipper machine, shunt tubes 16 exit linkage has temporarily to store storehouse 17, and the flow of powdery material increases suddenly in zipper machine 2 when surpassing zipper machine load for unnecessary powdery material can get into temporarily to store storehouse 17 through shunt tubes 16, avoids zipper machine 2's overload operation. Store storehouse 17 bottom temporarily and be connected to on the material pipe between zip fastener machine 2 and the buffer bin 3, draw the steady back of the flow of the powdery material in the fastener machine 2, open the fifth butterfly valve D5 of storing storehouse 17 bottom temporarily, carry the powdery material in the storehouse 17 to the buffer bin 3 in temporarily to avoid the waste of powdery material.

In addition, at the first gas-solid hybrid tube 11 that buffer bin 3 top set up, first gas-solid hybrid tube 11 is connected with first separator for the powdered material of suspension in the buffer bin 3 is carried powdered material to buffer bin 3 once more through first gas-solid hybrid tube 11, first separator and second material pipe 19 in proper order, when avoiding producing dust pollution, has also reduced powdered material's waste.

Two dense phase pneumatic conveying storehouses are parallelly connected to buffer bin 3 bottom and set up, record as first dense phase pneumatic conveying storehouse 8 and second dense phase pneumatic conveying storehouse 9 respectively, buffer bin 3 bottom is connected with first dense phase pneumatic conveying storehouse 8, second dense phase pneumatic conveying storehouse 9 respectively through two inlet pipes 22, be equipped with first pneumatic butterfly valve AD1 on the inlet pipe 22 of first dense phase pneumatic conveying storehouse 8, be equipped with second pneumatic butterfly valve AD2 on the inlet pipe 22 of second dense phase pneumatic conveying storehouse 9. The input ends of the bottoms of the two concentrated-phase pneumatic conveying bins are respectively connected with two high-pressure air pipelines 10, the high-pressure air pipeline 10 connected with the first concentrated-phase pneumatic conveying bin 8 is provided with a third pneumatic butterfly valve AD3, and the high-pressure air pipeline 10 connected with the second concentrated-phase pneumatic conveying bin 9 is provided with a fourth pneumatic butterfly valve AD 4. The output ends of the bottoms of the two concentrated phase pneumatic conveying bins are respectively connected with two second gas-solid mixing pipes 12, the two second gas-solid mixing pipes 12 go round to a main output pipe 13, the main output pipe 13 is connected to a finished product bin 14 through a third gas-solid mixing pipe 29 after passing through a second separator, and a ninth butterfly valve D9 is arranged on the third gas-solid mixing pipe 29.

The two high-pressure air pipelines 10 are converged to a main high-pressure air pipeline 27 and then connected with a compressed air storage tank 28, and an eighth butterfly valve D8 is arranged on the main high-pressure air pipeline 27. The compressed air storage tank 28 is connected with the high-pressure compressed air device 26, and a seventh butterfly valve D7 is arranged on a pipeline connecting the compressed air storage tank 28 with the high-pressure compressed air device 26. Compressed air storage tank 28 still is connected with high-pressure air branch pipe 30, and this high-pressure air branch pipe 30 sets up with main output tube 13 is parallel, and is equipped with a plurality of ball valve BVAs between high-pressure air branch pipe 30 and the main output tube 13, through opening a plurality of ball valve BVAs that are connected with high-pressure air branch pipe 30 for high-pressure air branch pipe 30 can disperse the gas injection to main output tube 13, avoids main output tube 13 to block up, improves the conveying efficiency of powdery material.

In addition, the first separator is a first-stage dust remover, and the second separator is a second-stage dust remover; the dust collectors 23 in the first separator and the second separator are both connected with a fan 24; the dust remover 23 in the first separator inputs the separated powdery material into the buffer bin 3 through the second material pipe 19, and the two dust removers 23 in the second separator convey the separated powdery material to the finished product bin 14 through the third material pipe 20 and the fourth material pipe 21 respectively, so that the waste of the powdery material is effectively reduced. First separator and second separator all filter the dusty gas and retrieve powdery material, and the dustless gas of discharge effectively avoids producing dust pollution in dense phase transportation process.

Example 2

A dense phase environment-friendly continuous conveying method for powdery materials comprises the following steps:

(1) powdery materials in the raw material bin 1 are conveyed into the zipper machine 2 through a material pipe, the running speed of a chain in the zipper machine 2 is 0.8m/s, the low-pressure compressed air device 25 is opened, and meanwhile, the first butterfly valve D1 and the ball valve BVA are opened, so that low-pressure compressed air provided by the low-pressure compression control device is uniformly distributed at the bottom of the zipper machine 2, and the powdery materials in the zipper machine 2 are in a suspension state; wherein, the relative pressure of the low-pressure compressed air is 49.9KPa, and the solid-gas ratio in the zipper machine 2 is 8 Kg/Kg.

(2) The powdery material of suspension form in the zip fastener machine 2 is carried to buffer bin 3 through first material pipe 18, keeps the open mode of second butterfly valve D2 and sixth butterfly valve D6 simultaneously for draw the fastener machine 2 and the dusty gas in buffer bin 3 behind first separator, powdery material falls and falls into buffer bin 3 once more, and dustless gas is discharged through fan 24.

(3) The unloading of buffer bin 3 carries out the unloading according to the operating cycle in dense phase pneumatic conveying storehouse, when first dense phase pneumatic conveying storehouse 8 begins to operate, opens first pneumatic butterfly valve AD1, and first dense phase pneumatic conveying storehouse 8 begins the feeding, and the input time is 300s, finishes the back when the feeding of first dense phase pneumatic conveying storehouse 8, closes first pneumatic butterfly valve AD1, opens second pneumatic butterfly valve AD2 and third pneumatic butterfly valve AD 3.

After the third pneumatic butterfly valve AD3 is opened, high-pressure compressed air provided by the high-pressure compressed air device 26 is conveyed to the first concentrated phase pneumatic conveying bin 8 through the compressed air storage tank 28, the high-pressure air main pipeline 27 and the high-pressure air pipeline 10, and the first concentrated phase pneumatic conveying bin 8 carries out concentrated phase conveying on the powdery material, so that the powdery material is conveyed to the finished product bin 14 after sequentially passing through the second gas-solid mixing pipe 12, the main output pipe 13 and the second separator which are connected with the first concentrated phase pneumatic conveying bin 8 under the action of the high-pressure compressed air; wherein, the conveying time of the concentrated phase is 300s, the relative pressure of the high-pressure compressed air is 0.6MPa, and the solid-gas ratio is 40 Kg/Kg.

After the second pneumatic butterfly valve AD2 is opened, the second dense-phase pneumatic conveying bin 9 starts feeding, the feeding time is 300s, the feeding condition is the same as that of the first dense-phase pneumatic conveying bin 8, namely when the first dense-phase pneumatic conveying bin 8 carries out dense-phase conveying of powdery materials, the second dense-phase pneumatic conveying bin 9 carries out feeding operation, and the dense-phase conveying time and the feeding time are both 300 s.

(4) And when the dense phase conveying of the first dense phase pneumatic conveying bin 8 is finished, namely the feeding of the second dense phase pneumatic conveying bin 9 is finished, closing the second pneumatic butterfly valve AD2 and the third pneumatic butterfly valve AD3, and opening the first pneumatic butterfly valve AD1 and the fourth pneumatic butterfly valve AD 4.

The first pneumatic butterfly valve AD1 is opened, the first dense-phase pneumatic conveying bin 8 starts feeding, the feeding time is 300s, and the feeding conditions such as the relative pressure of compressed air and the solid-gas ratio are consistent with the above.

And the fourth pneumatic butterfly valve AD4 is opened, the second concentrated phase pneumatic conveying bin 9 starts to convey the concentrated phase of the powdery material, and the concentrated phase conveying condition is consistent with the conditions. Namely, when the second concentrated phase pneumatic conveying bin 9 is used for carrying out concentrated phase conveying on the powdery material, the first concentrated phase pneumatic conveying bin 8 is used for carrying out feeding operation, and the concentrated phase conveying time and the feeding time are both 300 s.

(5) And (4) repeating the steps (3) to (4) to ensure that the two concentrated-phase pneumatic conveying bins periodically and alternately feed and convey the powdery material, thereby achieving the purpose of continuous conveying.

(6) In the operation process of the two concentrated-phase pneumatic conveying bins, the ball valve BVA arranged between the main output pipe 13 and the high-pressure air branch pipe 30 is kept in an open state, and the main output pipe is subjected to dispersed gas injection through the plurality of ball valves BVA, so that the main output pipe is prevented from being blocked; after the suspended materials in the main output pipe pass through the second separator, the powdery materials fall into the finished product bin, the dust-containing gas in the finished product bin enters the second separator through the third gas-solid mixing pipe 29, the powdery materials separated by the second separator fall back to the finished product bin through the third material pipe 20 and the fourth material pipe 21, and the dust-free gas separated by the second separator is discharged through the fan 24, so that dust pollution in the concentrated phase conveying process is avoided.

Example 3

The difference between the environment-friendly continuous dense-phase conveying method for the powdery material provided by this embodiment and embodiment 2 is that when the humidity of the conveyed powdery material is high and does not meet the dense-phase conveying requirement, for example, when the humidity of the powdery material is 3% or higher than 3%, the dense-phase conveying is directly performed according to the method in embodiment 1, which may cause the powdery material to adhere to the inner wall of the pipeline, so that the dense-phase conveying cannot be performed normally.

For solving this problem, this embodiment adopts former feed bin 1 to begin when 2 baits draw zipper machine, just open heating device 15, utilize heating device 15 to heat low pressure compressed air, make low pressure compressed air after the heating mix the back with powdery material in draw zipper machine 2, can carry out drying process to powdery material, reduce powdery material's humidity to 0.5%, in order to reach the requirement of dense phase transport to material humidity, avoid powdery material to adhere to in pipeline inner wall because of humidity is high in transportation process, be convenient for carry going on smoothly dense phase.

Example 4

When the flow of the powdery material in the zipper machine 2 is suddenly increased to exceed the normal load of the zipper machine 2, the following method is adopted to continuously convey the dense-phase powdery material, and the method comprises the following steps:

(1) powdery materials in the raw material bin 1 are conveyed into the zipper machine 2 through a material pipe, the running speed of a chain in the zipper machine 2 is 0.8m/s, the low-pressure compressed air device 25 is opened, and meanwhile, the first butterfly valve D1 and the ball valve BVA are opened, so that low-pressure compressed air provided by the low-pressure compression control device is uniformly distributed at the bottom of the zipper machine 2, and the powdery materials in the zipper machine 2 are in a suspension state; wherein, the relative pressure of the low-pressure compressed air is 49.9KPa, and the solid-gas ratio in the zipper machine 2 is 8 Kg/Kg.

(2) Powdery materials suspended in the zipper machine 2 are conveyed to the buffer bin 3 through the first material pipe 18, and meanwhile, the opening states of the second butterfly valve D2, the third butterfly valve D3, the fourth butterfly valve D4 and the sixth butterfly valve D6 are kept, so that after dust-containing gas in the zipper machine 2 and the buffer bin 3 passes through the first separator, the powdery materials fall into the buffer bin 3 again, and the dust-free gas is discharged through the fan 24;

and, carry the excessive powdery material in the zipper machine 2 to the temporary storage bin 17 through the shunt tubes 16, after the flow of the powdery material in the zipper machine 2 is steady, open the fifth butterfly valve D5, carry the powdery material in the temporary storage bin 17 to the buffer bin 3, in order to avoid the overload operation of zipper machine 2, after the dusty gas in the temporary storage bin 17 passes through the first separator, the powdery material falls back to the buffer bin 3 through the second material pipe 19, dustless gas discharges through the fan 24.

(3) The unloading of buffer bin 3 carries out the unloading according to the operating cycle in dense phase pneumatic conveying storehouse, when first dense phase pneumatic conveying storehouse 8 begins to operate, opens first pneumatic butterfly valve AD1, and first dense phase pneumatic conveying storehouse 8 begins the feeding, and the input time is 300s, finishes the back when the feeding of first dense phase pneumatic conveying storehouse 8, closes first pneumatic butterfly valve AD1, opens second pneumatic butterfly valve AD2 and third pneumatic butterfly valve AD 3.

After the third pneumatic butterfly valve AD3 is opened, high-pressure compressed air provided by the high-pressure compressed air device 26 is conveyed to the first concentrated phase pneumatic conveying bin 8 through the compressed air storage tank 28, the high-pressure air main pipeline 27 and the high-pressure air pipeline 10, and the first concentrated phase pneumatic conveying bin 8 carries out concentrated phase conveying on the powdery material, so that the powdery material is conveyed to the finished product bin 14 after sequentially passing through the second gas-solid mixing pipe 12, the main output pipe 13 and the second separator which are connected with the first concentrated phase pneumatic conveying bin 8 under the action of the high-pressure compressed air; wherein, the conveying time of the concentrated phase is 300s, the relative pressure of the high-pressure compressed air is 0.6MPa, and the solid-gas ratio is 40 Kg/Kg.

After the second pneumatic butterfly valve AD2 is opened, the second dense-phase pneumatic conveying bin 9 starts feeding, the feeding time is 300s, the feeding condition is the same as that of the first dense-phase pneumatic conveying bin 8, namely when the first dense-phase pneumatic conveying bin 8 carries out dense-phase conveying of powdery materials, the second dense-phase pneumatic conveying bin 9 carries out feeding operation, and the dense-phase conveying time and the feeding time are both 300 s.

(4) And when the dense phase conveying of the first dense phase pneumatic conveying bin 8 is finished, namely the feeding of the second dense phase pneumatic conveying bin 9 is finished, closing the second pneumatic butterfly valve AD2 and the third pneumatic butterfly valve AD3, and opening the first pneumatic butterfly valve AD1 and the fourth pneumatic butterfly valve AD 4.

The first pneumatic butterfly valve AD1 is opened, the first dense-phase pneumatic conveying bin 8 starts feeding, the feeding time is 300s, and the feeding conditions such as the relative pressure of compressed air and the solid-gas ratio are consistent with the above.

And the fourth pneumatic butterfly valve AD4 is opened, the second concentrated phase pneumatic conveying bin 9 starts to convey the concentrated phase of the powdery material, and the concentrated phase conveying condition is consistent with the conditions. Namely, when the second concentrated phase pneumatic conveying bin 9 is used for carrying out concentrated phase conveying on the powdery material, the first concentrated phase pneumatic conveying bin 8 is used for carrying out feeding operation, and the concentrated phase conveying time and the feeding time are both 300 s.

(5) And (4) repeating the steps (3) to (4) to ensure that the two concentrated-phase pneumatic conveying bins periodically and alternately feed and convey the powdery material, thereby achieving the purpose of continuous conveying.

(6) In the operation process of the two concentrated-phase pneumatic conveying bins, the ball valve BVA arranged between the main output pipe 13 and the high-pressure air branch pipe 30 is kept in an open state, and the main output pipe is subjected to dispersed gas injection through the plurality of ball valves BVA, so that the main output pipe is prevented from being blocked; after the suspended materials in the main output pipe pass through the second separator, the powdery materials fall into the finished product bin, the dust-containing gas in the finished product bin enters the second separator through the third gas-solid mixing pipe 29, the powdery materials separated by the second separator fall back to the finished product bin through the third material pipe 20 and the fourth material pipe 21, and the dust-free gas separated by the second separator is discharged through the fan 24, so that dust pollution in the concentrated phase conveying process is avoided.