Cold-state tail gas entrainment experiment device

Abstract

The utility model relates to a cold-state tail gas entrainment experiment device, and belongs to the technical field of drying process experiment devices. The cold-state tail gas entrainment experiment device comprises a vertical tower, a discharge port is formed in the bottom end of the vertical tower, an air outlet is formed in the top end of the vertical tower, an air inlet is formed in one side of the bottom of the vertical tower, a feed port is formed in one side of the top of the vertical tower, the air inlet is in butt joint with an air supply device, and the air outlet is in butt joint with a dust recovery device. The discharging port is connected with the feeding port through a circulating feeding device. The experimental device designed by the utility model can be used for simulating a material drying process of a rotary kiln and the like, is used for measuring the section gas velocity of a material sliding pipe for transferring materials and the dust content of tail gas in the drying process, and provides more reference bases for the design of a production device.

Description

Technical Field

[0001] The utility model relates to the technical field of drying process experimental devices, in particular to a cold tail gas entrainment experimental device. Background Art

[0002] The rotary kiln drying process is commonly used in industrial production drying and roasting processes. The rotary kiln uses a single kiln body or is divided into several connected kiln bodies. The material is added at one end of the kiln body's feed hood, moves forward as the kiln body rotates, and is discharged at one end of the discharge hood. During the drying process, depending on the drying and roasting process of the specific material, it is generally necessary to introduce a moisture-carrying gas or a protective gas. The moisture-carrying gas and the protective gas used in the roasting process will fully contact the powdered material during the discharge process, forming dust-laden, high-temperature exhaust gas. When multiple kilns are used in series and connected by a chute for material transfer, the material will collide with the rising exhaust gas during the transfer process, generating dust and causing instability in the continuous discharge. In actual industrial production, the methods for treating dust-laden, high-temperature exhaust gas include dust removal with a dust collector, washing with a scrubber, condensation with a heat exchanger, and a combination of the above methods, with the aim of recovering dust from the exhaust gas. However, in the current exhaust gas treatment of industrial drying and roasting processes, the dust content entrained in the exhaust gas is not measured, and the operating status of the exhaust gas is not understood. Most of the time, the dust recovery device is arranged based on experience, and the dust and air volume are not quantitatively calculated. This leads to a power mismatch between the dust removal equipment, resulting in pipeline blockage, low production efficiency, and increased operating costs. Summary of the Invention

[0003] In order to solve the problems in the existing technology, this utility model patent designs a cold exhaust entrainment experimental device. Through this experimental device, the process of material transfer between kilns in the drying and roasting process is simulated, the dust entrainment of the exhaust gas in the device can be directly observed, the dust content of the exhaust gas can be calculated, and the exhaust gas treatment of the rotary kiln can be more scientifically guided, thereby reducing environmental pollution and improving the exhaust gas treatment efficiency and purification effect.

[0004] The technical solution adopted by the present invention is: the cold exhaust entrainment experimental device includes a vertical tower, the bottom end of the vertical tower is provided with a discharge port, the top end is provided with an air outlet, one side of the bottom of the vertical tower is provided with an air inlet, and one side of the top is provided with a feed port, the air inlet is connected to an air supply device, the air outlet is connected to a dust recovery device, and the discharge port is connected to the feed port through a circulating feeding device.

[0005] Furthermore, the dust recovery device includes a cyclone dust collector, a bag dust collector and an induced draft fan which are sequentially connected by pipelines, and the air inlet end pipeline of the cyclone dust collector is connected to the air outlet at the top of the vertical tower.

[0006] Further, the circulating feeding device comprises a return screw conveyor, a bucket elevator and a feeding screw conveyor connected in sequence, the feeding end of the return screw conveyor is connected to the discharge port of the bottom end of the vertical tower, the discharge end of the bottom of the bucket elevator is connected to the feeding end of the return screw conveyor, the discharge end of the upper part of the bucket elevator is connected to the feeding end of the feeding screw conveyor, and the discharge end of the feeding screw conveyor is connected to the feeding port of the top part of the vertical tower.

[0007] Further, the vertical tower is made of transparent acrylic material, and a plurality of support frames are symmetrically arranged on the outer side of the vertical tower.

[0008] Further, the circulating feeding device further comprises a feeding bin, the feeding bin is arranged between the bucket elevator and the feeding screw conveyor, the discharge end of the bucket elevator is connected to the feeding end of the top part of the feeding bin, and the discharge end of the bottom part of the feeding bin is connected to the feeding end of the feeding screw conveyor.

[0009] Further, a dust sensor is arranged on the connecting pipeline between the air blower and the bag dust collector.

[0010] Further, the air supply device is an air blower, and the air outlet pipeline of the air blower is connected to the air inlet of the bottom part of the vertical tower.

[0011] Further, an air component regulator is arranged on the connecting pipeline between the air blower and the vertical tower.

[0012] Further, the discharge port of the bottom end of the vertical tower is provided with a plug valve.

[0013] Compared with the prior art, the progress of the cold-state tail gas entrainment experimental device lies in that:

[0014] The experimental device constitutes an acrylic experimental table cold-state tail gas entrainment experimental system, the vertical tower replaces the material conveying pipe between the drying roasting process kiln bodies, realizes the simulation of the material state of the low-temperature kiln discharge vertically entering the high-temperature kiln through the material conveying pipe, the vertical tower is made of transparent acrylic material, the movement state of the material in the tower can be directly observed, and the device is more convenient and direct.

[0015] The experimental device is designed to have a circulating feeding device composed of a discharge screw conveyor, a bucket elevator, a feeding bin and a feeding screw conveyor, forms a closed loop of material conveying, can realize the recycling of the material, avoids frequent feeding and discharging operations, saves labor cost and reduces environmental pollution, and meanwhile, the material in the system can be supplemented through the feeding opening in the upper end of the feeding bin when the material in the system is reduced.

[0016] During the experiment, the feed rate, gas flow rate and air composition can be adjusted online to simulate different working conditions. By weighing the dust material carried by the gas collected in the bag filter and cyclone dust collector, the exhaust entrainment under different working parameters can be obtained.

[0017] This experimental device sets a dust sensor on the pipeline before the induced draft fan to detect the exhaust gas after two-stage dust removal, so as to scientifically guide the layout of exhaust gas dust removal equipment in industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the cold exhaust entrainment experimental device.

[0019] Figure 2 It is a schematic diagram of the structure of the vertical tower of the cold exhaust gas entrainment experimental device.

[0020] In the figure, 1 is a vertical tower, 2 is a return screw conveyor, 3 is a bucket elevator, 4 is a feeding bin, 5 is a feed screw conveyor, 6 is a blower, 7 is an air component regulator, 8 is a cyclone dust collector, 9 is a bag dust collector, 10 is an induced draft fan, 11 is a dust sensor, 41 is a feeding port, 31 is a discharge end face, 101 is an air outlet, 102 is a feeding port, 103 is a support frame, 104 is an air inlet, and 105 is a discharge port. DETAILED DESCRIPTION

[0021] The present invention is further described below with reference to the accompanying drawings and specific embodiments. The technical solutions in the embodiments of the present invention are clearly and completely described. The embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0022] like Figure 1 、 2 As shown, the utility model patent designs an embodiment of a cold exhaust entrainment experimental device. In this embodiment, the cold exhaust entrainment experimental device includes a vertical tower 1, an air supply device, a circulating feeding device and a dust recovery device. The vertical tower 1 is an acrylic tower made of a transparent material. Four support frames 103 are symmetrically arranged on the outer side of the middle part of the vertical tower 1 for the installation and support of the vertical tower 1. A discharge port 105 is provided at the bottom end of the vertical tower 1, an air outlet 101 is provided at the top, an air inlet 104 is provided on one side of the bottom of the vertical tower 1, and a feed port 102 is provided on the other side of the top. The air inlet 104 is used for connecting the pipeline to the air supply device, the air outlet 101 is used for connecting the pipeline to the dust recovery device, and a plug valve is provided at the discharge port 105, which is connected to the feed port 102 through a circulating feeding device.

[0023] The air supply device is a blower 6, and the air outlet end pipeline of the blower 6 is connected with the air inlet 104 at the bottom of the vertical tower 1. An air component regulator 7 is arranged on the connecting pipeline between the blower 6 and the vertical tower 1, and is used for adjusting the humidity, component content and the like of the input air.

[0024] The dust recovery device comprises a cyclone dust collector 8, a bag-type dust collector 9 and an air induction fan 10 connected in sequence, and the air inlet end pipeline of the cyclone dust collector 8 is connected with the air outlet 101 at the top end of the vertical tower 1. A dust sensor 11 is arranged on the connecting pipeline between the air induction fan 10 and the bag-type dust collector 9, and is used for detecting the content of dust in the tail gas after the dust is recovered by the two-stage dust collector.

[0025] The circulating feeding device comprises a return screw conveyor 2, a bucket elevator 3, a feeding bin 4 and a feeding screw conveyor 5 connected in sequence, the feeding end of the return screw conveyor 2 is connected with the discharge port 105 at the bottom end of the vertical tower 1, the discharge end of the bucket elevator 3 is connected with the feeding end at the top of the feeding bin 4, the discharge end of the feeding bin 4 is connected with the feeding end of the feeding screw conveyor 5, and the discharge end of the feeding screw conveyor 5 is connected with the feeding port 102 at the top of the vertical tower 1. The upper part of the feeding bin 4 is provided with a feeding opening 41, and the system is supplemented with materials through the feeding opening. The bottom outer side of the bucket elevator 3 is provided with a discharge end face 31, so that the residual materials in the bucket elevator 3 can be conveniently discharged.

[0026] The specific process of the cold-state tail gas entrainment experimental device disclosed by the utility model patent for simulation experiment is as follows: the air induction fan 10, the blower 6 and the air component regulator 7 are started, the tail gas condition of the rotary kiln is simulated, the feeding bin 4 is opened, the materials are fed into the acrylic vertical tower 1 by the feeding screw conveyor 5, the materials are contacted with the rising air flow, part of the particles are carried into the cyclone dust collector 8 and the bag-type dust collector 9 by the air flow, and the materials are collected by the two-stage dust collector. Most of the materials fall into the bottom of the acrylic vertical tower 1, are transported to the bucket elevator 3 by the return screw conveyor 2, are then lifted to the feeding bin 4, and the circulation use of the materials can be realized. The acrylic vertical tower 1 can be used for directly observing the state of the materials in the air flow, the feeding amount can be changed by adjusting the work rate of the feeding screw conveyor 5, the air volume can be adjusted by the blower 6 and the air induction fan 10, the air humidity and the air component can be adjusted by the air component regulator 7, and the real tail gas component can be simulated. The specific tail gas entrainment amount can be obtained by measuring the cross-sectional air speed and collecting the materials collected by the cyclone dust collector 8 and the bag-type dust collector 9. The dust sensor 11 is connected to the rear end of the bag-type dust collector 9, and the purification effect of the tail gas after the two-stage dust collection can be detected.

[0027] The above content is only the preferred embodiment of the present application, and cannot limit the implementation range of the present application. Any simple equivalent change and modification made according to the claims and the description of the present application still belongs to the scope of the present application.

Claims

1. A cold tail gas entrainment experimental device, characterized in that: The cold exhaust entrainment experimental device includes a vertical tower, a discharge port is opened at the bottom of the vertical tower, an air outlet is opened at the top, an air inlet is opened on one side of the bottom of the vertical tower, and a feed port is opened on one side of the top, the air inlet is connected to an air supply device, the air outlet is connected to a dust recovery device, and the discharge port is connected to the feed port through a circulating feeding device.

2. A cold exhaust entrainment experimental device according to claim 1, characterized in that: The dust recovery device comprises a cyclone dust collector, a bag dust collector and an induced draft fan which are sequentially connected by pipelines, and the air inlet end pipeline of the cyclone dust collector is connected to the air outlet at the top of the vertical tower.

3. A cold tail gas entrainment experimental device according to claim 2, characterized in that: The circulating feeding device includes a return screw conveyor, a bucket elevator and a feed screw conveyor which are connected in sequence. The feed end of the return screw conveyor is connected to the discharge port at the bottom end of the vertical tower, and the discharge end is connected to the feed end at the bottom of the bucket elevator. The discharge end at the top of the bucket elevator is connected to the feed end of the feed screw conveyor, and the discharge end of the feed screw conveyor is connected to the feed port at the top of the vertical tower.

4. The cold exhaust entrainment experimental device according to claim 1, characterized in that: The vertical tower is an acrylic tower made of a transparent material, and a plurality of support frames are symmetrically arranged on the outer side of the vertical tower.

5. The cold exhaust entrainment experimental device according to claim 3, characterized in that: The circulating feeding device also includes a feeding bin, which is arranged between the bucket elevator and the feeding screw conveyor. The discharge end of the bucket elevator is connected to the feeding end at the top of the feeding bin, and the discharge end at the bottom of the feeding bin is connected to the feeding end of the feeding screw conveyor.

6. The cold exhaust entrainment experimental device according to claim 2, characterized in that: A dust sensor is provided on the connecting pipeline between the induced draft fan and the bag dust collector.

7. The cold exhaust entrainment experimental device according to claim 1, characterized in that: The air supply device is a blower, and the air outlet pipe of the blower is connected to the air inlet at the bottom of the vertical tower.

8. The cold exhaust entrainment experimental device according to claim 7, characterized in that: An air component regulator is provided on the connecting pipeline between the blower and the vertical tower.

9. The cold exhaust entrainment experimental device according to claim 8, characterized in that: The discharge port at the bottom end of the vertical tower is provided with a plug valve.

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