Rotary kiln dust removal device for tricalcium phosphate

Abstract

The utility model discloses a dust removal device of a rotary kiln for tricalcium phosphate. The dust removal device comprises a Venturi dust remover, a cyclone separator, an electrostatic dust remover and a water spray tower which are communicated with a waste gas outlet of the rotary kiln, a liquid outlet of the cyclone separator is communicated with a vertical flow type sedimentation tank, and a gas outlet of the vertical flow type sedimentation tank is communicated with a water spray tower; an overflow port is formed in the upper part of the vertical-flow sedimentation tank, an overflow groove is formed in the side wall of the vertical-flow sedimentation tank at the overflow port, a water suction pump is arranged in the overflow groove, and the water suction pump is communicated with the Venturi dust remover through a pipeline. The device is good in dust removal effect, waste liquid in the dust removal process is recycled, and the dust removal cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of dust removal devices, in particular to a rotary kiln dust removal device for tricalcium phosphate. Background Art

[0002] Calcium phosphate is an inorganic compound that is a white crystal or amorphous powder. It is slightly soluble in water, easily soluble in dilute hydrochloric acid and nitric acid, and insoluble in ethanol, acetone and ether. It is often used as an anti-caking agent, acidity regulator, nutritional supplement (fortified calcium), flavor enhancer, stabilizer, moisture retainer, and as an antacid in medicine.

[0003] At present, when producing inositol, the phytin hydrolyzate and lime water are usually mixed to react to generate tricalcium phosphate insolubles, which are then filtered through a plate and frame filter. The filter cake obtained by filtration is dried and calcined to obtain the by-product tricalcium phosphate. The wet tricalcium phosphate contains a large amount of organic matter and other impurities. The process of calcining the wet tricalcium phosphate in a rotary kiln will produce a large amount of organic smoke and dust waste gas. The previous method of reducing smoke is mainly to use a cyclone separator and a bag dust collector for treatment. The above method has poor effect and is easy to clog. Therefore, in order to solve the above technical problems, it is necessary to provide a rotary kiln dust removal device with good dust removal effect. Utility Model Content

[0004] The technical problem to be solved by the utility model is: in view of the deficiencies in the prior art, a rotary kiln dust removal device for tricalcium phosphate is provided, the dust removal effect of the device is good, and the waste liquid in the dust removal process is recycled, which greatly reduces the dust removal cost.

[0005] In order to solve the above technical problems, the technical solution of the utility model is:

[0006] A rotary kiln dust removal device for tricalcium phosphate comprises a venturi dust collector connected to the exhaust gas outlet of the rotary kiln, a cyclone separator, an electrostatic dust collector and a water spray tower; the liquid outlet of the cyclone separator is connected to a vertical flow sedimentation tank, and the gas outlet of the vertical flow sedimentation tank is connected to the water spray tower; an overflow port is provided at the top of the vertical flow sedimentation tank, an overflow trough is provided on the side wall of the vertical flow sedimentation tank at the overflow port, a water pump is provided in the overflow trough, and the water pump is connected to the venturi dust collector through a pipeline.

[0007] As an improved technical solution, the electrostatic precipitator is also connected to a compressed air storage tank via a backflush pipe, and an electromagnetic pulse valve is provided on the backflush pipe.

[0008] As an improved technical solution, a dust collecting plate is provided in the electrostatic precipitator, a pressure sensor is provided at the bottom of the dust collecting plate, and the pressure sensor is interlocked with the electromagnetic pulse valve.

[0009] As an improved technical solution, a vertical flow pipe is provided in the vertical flow sedimentation tank, and a feed pipe of the vertical flow sedimentation tank extends into the interior of the vertical flow pipe.

[0010] As an improved technical solution, a spray head with an upward opening is provided at the end of the feed pipe.

[0011] As an improved technical solution, an umbrella-shaped baffle is provided at the exhaust port of the vertical flow sedimentation tank.

[0012] As an improved technical solution, the sewage outlet of the vertical flow sedimentation tank is connected to a chamber filter press.

[0013] As an improved technical solution, a spray mechanism is provided in the water spray tower, and the spray mechanism includes a spray pipe and a spray head connected to the spray pipe, and the spray pipe is connected to a tap water pipeline.

[0014] As an improved technical solution, the bottom of the water spray tower is also connected to a drainage pipe, and a drainage pump is provided on the drainage pipe.

[0015] As an improved technical solution, a density meter is provided on the discharge pipe, and the discharge pipe is also connected to a circulation pipe and a recovery pipe. The circulation pipe and the recovery pipe are respectively provided with a first electric valve and a second electric valve; the circulation pipe is connected to a spray pipe, and the recovery pipe is connected to a Venturi dust collector.

[0016] As an improved technical solution, a porous plate is provided on the top of the water spray tower.

[0017] Due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0018] The utility model provides a rotary kiln dust removal device for tricalcium phosphate, comprising a venturi dust collector connected to the exhaust gas outlet of the rotary kiln, a cyclone separator, an electrostatic dust collector, a vertical flow sedimentation tank and a water spray tower; in the device, the smoke generated by the rotary kiln enters the venturi dust collector, the dust in the smoke is fully contacted with atomized water droplets, the formed dust droplets and wind mixture are separated by the cyclone separator, and the gas enters the electrostatic dust collector, under the action of high-voltage charge, the charged dust is adsorbed on the dust collecting plate, when the dust collected on the dust collecting plate reaches a certain amount, the electromagnetic pulse valve is opened, the electrostatic dust collector is cleaned, and at the same time, under the action of high-voltage charge, part of the organic waste gas is decomposed into odorless gas, and finally the purified tail gas is drawn into the water spray tower, sprayed for deodorization again, thereby improving the dust removal effect and avoiding the occurrence of device blockage during dust removal.

[0019] The waste liquid outlet of the cyclone separator in the device is connected to the vertical flow sedimentation tank to carry out sedimentation treatment on the waste liquid. The supernatant after sedimentation enters the overflow trough through the overflow port for collection and is used in the Venturi dust collector, thus realizing the recycling of waste water, reducing the waste water treatment cost on the one hand and the dust removal cost on the other.

[0020] In the device, a vertical flow pipe is provided in the vertical flow sedimentation tank, and a feed pipe of the vertical flow sedimentation tank extends into the interior of the vertical flow pipe; a spray head with an upward opening is provided at the end of the feed pipe, and the upward opening of the spray head increases the descending path of the waste liquid in the vertical flow sedimentation tank, is more conducive to solid-liquid separation, and improves the sedimentation effect.

[0021] In this device, an umbrella-shaped baffle is provided at the exhaust port of the vertical flow sedimentation tank. The setting of the umbrella-shaped baffle is convenient for collecting waste gas generated by sludge precipitation and fermentation, further improving the dust removal effect and avoiding secondary pollution.

[0022] The drainage pipe at the bottom of the water spray tower of the device is connected to the circulation pipe and the recovery pipe through a drainage pump. The drainage pipe is provided with a density meter, and the circulation pipe and the recovery pipe are respectively provided with a first electric valve and a second electric valve; the waste liquid after spraying and absorption is discharged from the drainage pipe, and the density of the waste liquid is tested by the density meter. If the density is too large, the second electric valve is opened through the external control system, and the waste liquid enters the Venturi dust collector for recycling; if the density is small, the first electric valve is opened through the external control system, and the waste liquid re-enters the water spray tower for utilization, which greatly reduces the dust removal cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] Figure 1 It is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0025] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0026] In the figure, 1. Venturi dust collector; 2. Cyclone separator; 3. Electrostatic precipitator; 4. Vertical flow sedimentation tank; 5. Chamber filter press; 6. Water spray tower; 7. Overflow port; 8. Overflow trough; 9. Water pump; 10. Vertical flow pipe; 11. Feed pipe; 12. Spray head; 13. Umbrella baffle; 14. Backflush pipe; 15. Compressed air storage tank; 16. Electromagnetic pulse valve; 17. Dust collecting plate; 18. Perforated plate; 19. Spray pipe; 20. Spray head; 21. Tap water pipe; 22. Drain pipe; 23. Drain pump; 24. Densitometer; 25. Circulation pipe; 26. Recovery pipe; 27. First electric valve; 28. Second electric valve. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0028] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0030] Example 1

[0031] like Figure 1 and Figure 2 As shown, a rotary kiln dust removal device for tricalcium phosphate includes a venturi dust collector 1 connected to the exhaust gas outlet of the rotary kiln, a cyclone separator 2, an electrostatic dust collector 3, a vertical flow sedimentation tank 4, a chamber filter press 5 and a water spray tower 6;

[0032] like Figure 1 As shown, the liquid outlet of the cyclone separator 2 is connected to the vertical flow sedimentation tank 4, and the wastewater after preliminary dust removal enters the vertical flow sedimentation tank 4 for sedimentation treatment. The gas outlet of the vertical flow sedimentation tank 4 is connected to the water spray tower 6; the upper part of the vertical flow sedimentation tank 4 is provided with an overflow port 7, and the side wall of the vertical flow sedimentation tank 4 is provided with an overflow trough 8 at the overflow port 7. The overflow trough 8 is provided with a pump 9, and the pump 9 is connected to the venturi dust collector 1 through a pipeline. Through the above-mentioned arrangement, after the dust removal waste liquid in the vertical flow sedimentation tank 4 is precipitated, the supernatant flows out with the overflow port 7 and enters the overflow trough 8 during the rising process, and enters the venturi dust collector 1 under the action of the pump 9 for recycling, thereby reducing the dust removal cost.

[0033] like Figure 1 and Figure 2 As shown together, further, in this embodiment, a vertical flow pipe 10 is provided in the vertical flow sedimentation tank 4, and a feed pipe 11 of the vertical flow sedimentation tank 44 extends into the interior of the vertical flow pipe 10; a spray head 12 with an opening facing upward is provided at the end of the feed pipe 11. The spray head 12 with an opening facing upward increases the downward path of the waste liquid in the vertical flow sedimentation tank 4, is more conducive to solid-liquid separation, and improves the sedimentation effect. The precipitated sludge is filtered by a chamber filter press 5, and the filtered waste residue is treated to remove the sludge.

[0034] Further, in this embodiment, if Figure 1 As described, an umbrella-shaped baffle 13 is provided at the exhaust port of the vertical flow sedimentation tank 4. The setting of the umbrella-shaped baffle 13 facilitates the collection of waste gas generated by sludge precipitation and fermentation, further improves the dust removal effect, and avoids secondary pollution.

[0035] Further, in this embodiment, if Figure 1 As shown, the electrostatic precipitator 3 is connected to the compressed air storage tank 15 through the backflush pipe 14, and the backflush pipe 14 is provided with an electromagnetic pulse valve 16; a dust collecting plate 17 is provided in the electrostatic precipitator 3, and a pressure sensor (not shown in the figure) is provided at the bottom of the dust collecting plate 17, and the pressure sensor is interlocked with the electromagnetic pulse valve 16. The setting of the pressure sensor facilitates real-time monitoring of the amount of dust on the dust collecting plate 17. When the amount of dust reaches a certain level, the pressure sensor transmits a signal to an external control system (not shown in the figure), and the external control system automatically controls the opening of the electromagnetic pulse valve 16, and passes compressed air into the electrostatic precipitator 3 through the backflush pipe 14 for backflush, thereby achieving the purpose of dust removal, and the cleaned dust and sludge treatment.

[0036] Further, in this embodiment, if Figure 1 As shown, a porous plate 18 is provided at the top of the water spray tower 6, and a spray mechanism is provided in the water spray tower 6, and the spray mechanism includes a spray pipe 19 and a spray head 20 connected to the spray pipe 19, and the spray pipe 19 is connected to a tap water pipe 21; further, the bottom of the water spray tower 6 is also connected to a drainage pipe 22, and a drainage pump 23 is provided on the drainage pipe 22; a density meter 24 is provided on the drainage pipe 22, and the drainage pipe 22 is also connected to a circulation pipe 25 and a recovery pipe 26, and the circulation pipe 25 and the recovery pipe 26 are respectively provided with a first electric valve 27 and a second electric valve 28; the circulation pipe 25 is connected to the spray pipe 19, and the recovery pipe 26 is connected to the Venturi dust collector 1. Based on the above arrangement, water is added into the water spray tower 6 through the tap water pipe 21, the spray pipe 19 and the spray head 20 to absorb the waste gas, and the absorbed waste liquid is discharged from the drainage pipe 22, and then the density of the waste liquid is tested by the density meter 24. If the density is small, the first electric valve 27 is opened through the external control system, and the waste liquid re-enters the water spray tower 6 for utilization; if the density is too large, the second electric valve 28 is opened through the external control system, and the waste liquid enters the Venturi dust collector 1 for recycling, which greatly reduces the dust removal cost, and the unabsorbed waste gas is discharged from the top of the water spray tower for sewage treatment; the waste liquid absorbed by the water spray tower is discharged from the sewage pipe for sewage treatment after sedimentation.

[0037] In addition, it should be understood that after reading the contents taught in the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A rotary kiln dust removal device for tricalcium phosphate, characterized in that: It includes a Venturi dust collector, a cyclone separator, an electrostatic dust collector and a water spray tower which are connected to the exhaust gas outlet of the rotary kiln; the liquid outlet of the cyclone separator is connected to a vertical flow sedimentation tank, and the gas outlet of the vertical flow sedimentation tank is connected to the water spray tower; an overflow port is provided at the top of the vertical flow sedimentation tank, an overflow trough is provided on the side wall of the vertical flow sedimentation tank at the overflow port, a water pump is provided in the overflow trough, and the water pump is connected to the Venturi dust collector through a pipeline.

2. A rotary kiln dust removal device for tricalcium phosphate according to claim 1, characterized in that: The electrostatic precipitator is also connected to a compressed air storage tank via a backflush pipe, and an electromagnetic pulse valve is provided on the backflush pipe.

3. A rotary kiln dust removal device for tricalcium phosphate according to claim 2, characterized in that: A dust collecting plate is arranged in the electrostatic precipitator, a pressure sensor is arranged at the bottom of the dust collecting plate, and the pressure sensor is interlocked with the electromagnetic pulse valve.

4. A rotary kiln dust removal device for tricalcium phosphate according to claim 1, characterized in that: A vertical flow pipe is arranged in the vertical flow sedimentation tank, and a feed pipe of the vertical flow sedimentation tank extends into the interior of the vertical flow pipe.

5. A rotary kiln dust removal device for tricalcium phosphate according to claim 4, characterized in that: A spray head with an upward opening is arranged at the end of the feed pipe.

6. A rotary kiln dust removal device for tricalcium phosphate according to claim 1, characterized in that: An umbrella-shaped baffle is provided at the exhaust port of the vertical flow sedimentation tank.

7. A rotary kiln dust removal device for tricalcium phosphate according to claim 1, characterized in that: The sewage outlet of the vertical flow sedimentation tank is connected to the chamber filter press.

8. A rotary kiln dust removal device for tricalcium phosphate according to claim 1, characterized in that: A porous plate is arranged on the top of the water spray tower, a spray mechanism is arranged inside the water spray tower, the spray mechanism comprises a spray pipe and a spray head connected with the spray pipe, and the spray pipe is connected with a tap water pipeline.

9. A rotary kiln dust removal device for tricalcium phosphate according to claim 8, characterized in that: The bottom of the water spray tower is also connected to a drainage pipeline, and a drainage pump is provided on the drainage pipeline.

10. A rotary kiln dust removal device for tricalcium phosphate according to claim 9, characterized in that: A density meter is provided on the discharge pipe, and the discharge pipe is also connected with a circulation pipe and a recovery pipe. The circulation pipe and the recovery pipe are respectively provided with a first electric valve and a second electric valve; the circulation pipe is connected with a spray pipe, and the recovery pipe is connected with a Venturi dust collector.

Images