Alkali transportation wet dust removal device for combined alkali production and calcination

Abstract

The utility model relates to the technical field of gas dust removal, in particular to an alkali transportation wet dust removal device for combined alkali production and calcination, which reduces the contact between alkali dust and washing liquid at an air inlet pipe opening, prevents the alkali dust from scabbing at the air inlet pipe opening to cause blockage, ensures the unobstructed state of an air inlet pipe, and is convenient to use and high in practicability. Comprising a washing tower which is internally provided with a round straight cylinder and upper and lower sealing heads; the device further comprises an air inlet pipe, an air outlet pipe, a liquid inlet pipe, a liquid discharge pipe and a water distribution device; the air inlet pipe is installed at the upper end of the washing tower, the lower end of the air inlet pipe is communicated with the upper portion of the washing tower round straight cylinder, the liquid inlet pipe is fixedly installed on the upper portion of the washing tower round straight cylinder, the output end of the liquid inlet pipe is connected with the water distribution device, and the water distribution device is installed on the upper portion of the washing tower round straight cylinder and has the water distribution and scabbing prevention functions. The air outlet pipe and the liquid discharge pipe are both mounted at the lower part of the washing tower, the input ends of the air outlet pipe and the liquid discharge pipe are both communicated with the round straight cylinder of the washing tower, and the liquid discharge pipe is lower than the air outlet pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of gas dust removal, in particular to a combined alkali production, calcination and alkali transportation wet dust removal device. Background Art

[0002] In the calcination production process of the combined alkali production method, wet heavy alkali (NaHCO3) will decompose to produce soda ash (Na2CO3) and water vapor after being heated in the calcining furnace. Since the water content in wet heavy alkali is high, and the decomposition of heavy alkali itself during the heating process will also produce moisture, part of this water vapor will be led out to the outside by the furnace gas system, and the remaining water vapor will enter the alkali transportation system together with the high-temperature materials. Since some alkali dust will be generated during the alkali transportation process, and due to the cooling during the alkali transportation process, condensed water will form scars with the alkali dust, affecting the normal operation of the alkali transportation system, an induced draft dust removal system is required to remove the alkali dust and water vapor in the alkali transportation system.

[0003] The induced draft dust removal system in the prior art generally includes an induced draft fan, a washing tower and a pipeline, and generally adopts a countercurrent washing method. An air inlet pipe is arranged at the lower part of the washing tower, and a water inlet pipe and a spray device are arranged at the upper part of the washing tower. The air inlet pipe of the washing tower is connected to the alkali transport system. When it is in use, the induced draft fan is turned on to make the washing tower negative pressure, and then the alkali dust and water vapor in the alkali transport system enter the washing tower through the air inlet pipe, and at the same time, the washing liquid is sprayed into the washing tower through the water inlet pipe spray device at the upper part of the washing tower, so that the washing liquid contacts the alkali dust in the process of descending, and the washing liquid is washed. The washing liquid adsorbs the dust, and at the same time, the washing liquid exchanges heat with water vapor. The water vapor cools down to form liquid water and falls into the washing tower. The washed gas is then discharged to the outside through the induced draft fan. The following problems exist during use. Since the air inlet of the washing tower is arranged at the lower part of the washing tower, when the washing liquid descends in the washing tower, a small amount of washing liquid is easy to contact with the alkaline dust at the air inlet, which is easy to cause the alkaline dust to form scars, and then cause the air inlet to be blocked, affecting the overall operation of the device. Therefore, a device that can prevent the alkaline dust from forming scars at the air inlet is needed. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a device for preventing alkali dust from contacting with washing liquid at the air inlet pipe mouth, thereby preventing alkali dust from forming scars in the air inlet pipe and causing blockage, thereby ensuring the unobstructed state of the air inlet pipe. The utility model is easy to use and has high practicality for the combined alkali production, calcination and alkali transportation wet dust removal device.

[0005] The utility model discloses a combined alkali making, calcining, alkali transporting and wet dust removal device, comprising a washing tower, the washing tower comprising a round straight cylinder, an upper end cap and a lower end cap, the upper end cap and the lower end cap are respectively mounted on the upper and lower parts of the round straight cylinder, a chamber is arranged in the round straight cylinder; the utility model is characterized in that the utility model further comprises an air inlet pipe, an air outlet pipe, a liquid discharge pipe, a liquid inlet pipe and a water distribution device, the air inlet pipe is mounted on the upper end cap of the washing tower, the lower end of the air inlet pipe is communicated with the upper part of the round straight cylinder of the washing tower, the liquid inlet pipe is fixedly mounted on the upper end of the round straight cylinder, the output end of the liquid inlet pipe is connected with the water distribution device, the water distribution device is mounted on the upper part of the round straight cylinder, the water distribution device has water distribution and anti-blocking functions, the water distribution device is located below the air inlet pipe, the air outlet pipe is mounted on the lower part of the round straight cylinder, the liquid discharge pipe is mounted on the lower part of the lower end cap of the washing tower, the input ends of the air outlet pipe and the liquid discharge pipe are both communicated with the chamber of the round straight cylinder, and the height of the liquid discharge pipe is lower than the height of the air outlet pipe. During operation, the induced draft fan is turned on to make the circular cylinder of the washing tower in a negative pressure state, so that the air containing alkali dust and water vapor in the alkali transport system enters the circular cylinder of the washing tower through the air inlet pipe, and then the circulation pump is turned on to make the washing liquid enter the water distribution device through the liquid inlet pipe, and then the washing liquid evenly overflows downward from the upper part of the circular cylinder of the washing tower through the water distribution device, and at the same time, the washing liquid contacts with the alkali dust and water vapor during the descent process, and the washing liquid adsorbs the alkali dust, and at the same time, the washing liquid cools the water vapor, and then the washing liquid falls to the lower part of the circular cylinder of the washing tower and is discharged and collected through the drain pipe, and the clean gas after washing is discharged through the outlet pipe; because the air inlet pipe is arranged at the upper end of the washing tower, and the height of the air inlet pipe is higher than the height of the water distribution device in the washing tower, the air containing alkali dust will not contact with the washing liquid near the air inlet pipe, so that the alkali dust is prevented from scarring and blocking at the air inlet pipe mouth, and the unobstructed state of the air inlet pipe is ensured, which is convenient to use and highly practical.

[0006] Preferably, the water distribution device includes a trough-type water distributor, a water distribution main pipe and a plurality of water distribution branch pipes. The trough-type water distributor is fixedly installed in the round straight cylinder of the washing tower, a main water distribution trough is provided in the middle of the trough-type water distributor, a plurality of water distribution branch troughs connected to the main water distribution trough are provided on both sides of the trough-type water distributor, the water distribution main pipe is fixedly installed on the trough-type water distributor, the water distribution main pipe is located in the main water distribution trough, the input end of the water distribution main pipe is connected to the liquid inlet pipe, the plurality of water distribution branch pipes are all connected to the water distribution main pipe, the plurality of water distribution branch pipes are respectively located in the plurality of water distribution branch troughs, a plurality of drainage holes are provided on both sides of the water distribution main pipe, and a plurality of water distribution branch pipes are provided on both sides of the left and right sides. Drainage hole; when the washing liquid enters the water distribution main pipe through the liquid inlet pipe, the washing liquid will enter the multiple groups of water distribution branch pipes through the water distribution main pipe, and then the washing liquid will be discharged into the water distribution main tank and the water distribution branch tank through the drainage holes on the water distribution main pipe and the multiple groups of water distribution branch pipes respectively. The washing liquid will overflow evenly into the round cylinder of the washing tower through the water distribution main tank and the water distribution branch tank on the trough-type water distributor, so that the washing liquid will be evenly washed and descended in the round cylinder of the washing tower, thereby increasing the contact area between the washing liquid and the gas in the round cylinder of the washing tower and ensuring the washing effect.

[0007] Preferably, it also includes a spray filler, which is fixedly installed in the middle of the round cylinder of the washing tower and is located below the water distribution device. Through the above arrangement, the washing liquid can form a water film on the spray filler after falling on the spray filler, thereby increasing the washing contact area between the washing liquid and the gas in the round cylinder, and increasing the washing effect on the gas in the round cylinder of the washing tower; at the same time, the gas deflection generated by the spray filler can improve the washing efficiency of the alkali dust.

[0008] Preferably, the height of the trough-type water distributor is 100-150 mm, preferably 120 mm.

[0009] Preferably, the spray filler is a ball ring made of stainless steel with a height of 480-520 mm.

[0010] Preferably, the distance between the trough-type water distributor and the spray filler is greater than or equal to 200 mm.

[0011] Preferably, it also includes an annular tube, which is fixedly installed on the top of the round straight cylinder, and a plurality of groups of drainage holes are arranged at the lower part of the annular tube, and the plurality of drainage holes are evenly distributed at the lower part of the annular tube; two groups of output ends are arranged on the liquid inlet pipe, and the two groups of output ends of the liquid inlet pipe are respectively connected with the annular tube and the water distribution main pipe; the external circulation pump is turned on to make the washing liquid enter the annular tube and the trough type water distributor respectively through the two groups of output ends on the liquid inlet pipe, and the washing liquid entering the annular tube is discharged through the plurality of drainage holes at the lower end of the annular tube and evenly sprayed onto the inner wall of the washing tower, and then the washing liquid flows up and down through the inner wall of the washing tower, and the washing liquid flushes the inner wall of the washing tower to prevent the alkali from forming scars on the inner wall of the washing tower, which is convenient to use and highly practical.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The wet dust removal device is set to a co-directional washing mode. Compared with reverse washing, it prevents alkaline dust from forming scars at the air inlet pipe and causing blockage, ensuring the unobstructed state of the air inlet pipe. It is easy to use and highly practical.

[0014] 2. The water distribution device can prevent blockage. A trough-type water distributor is set up, and overflow is used for washing. The airflow containing alkaline dust enters from the upper part of the overflow water. The dry-wet junction is above the water surface, which can eliminate the crystallization boundary area at the dry-wet junction. There is no fulcrum to form alkali scars. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional structural schematic diagram of the utility model;

[0016] Figure 2 It is a schematic diagram of the structure of the water distribution device from a top view;

[0017] Figure 31 is a schematic diagram of the structure of the annular tube when viewed from above;

[0018] Figure 4 It is an axonometric structural diagram of the water distribution device;

[0019] Figure 5 It is a structural diagram of the water distribution main pipe and the water distribution branch pipe.

[0020] Markings in the attached figure: 1. washing tower; 2. air inlet pipe; 3. air outlet pipe; 4. drain pipe; 5. liquid inlet pipe; 6. trough water distributor; 7. water distribution main pipe; 8. water distribution branch pipe; 9. annular pipe; 10. spray filler; 11. liquid baffle. DETAILED DESCRIPTION

[0021] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant drawings. The utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0022] Example

[0023] like Figures 1 to 5The utility model of the combined alkali production, calcination and alkali transportation wet dust removal device comprises a washing tower 1, which comprises a round straight cylinder, an upper end cap and a lower end cap, which are respectively mounted on the upper and lower parts of the round straight cylinder, and a chamber is arranged in the round straight cylinder; it is characterized in that it also comprises an air inlet pipe 2, an air outlet pipe 3, a liquid discharge pipe 4, a liquid inlet pipe 5 and a water distribution device, the air inlet pipe 2 is mounted on the upper end cap of the washing tower 1, the lower end of the air inlet pipe 2 is connected to the upper part of the round straight cylinder of the washing tower 1, and the liquid inlet pipe 5 is fixed to the upper end cap of the washing tower 1. The water distribution device is fixedly installed at the upper end of the round cylinder, the output end of the liquid inlet pipe 5 is connected to the water distribution device, the water distribution device is installed at the upper part of the round cylinder, the water distribution device has the function of water distribution and anti-blocking, the water distribution device is located below the air inlet pipe 2, the air outlet pipe 3 is installed at the lower part of the round cylinder, the drain pipe 4 is installed at the lower part of the lower head of the washing tower 1, the input ends of the air outlet pipe 3 and the drain pipe 4 are both connected to the chamber of the round cylinder, and the height of the drain pipe is lower than the height of the air outlet pipe; during operation, the induced draft fan is turned on to make the round cylinder of the washing tower 1 The straight cylinder is in a negative pressure state, so that the gas containing alkali dust and water vapor in the alkali transport system enters the round straight cylinder of the washing tower 1 through the air inlet pipe 3, and then the circulating pump is turned on to allow the washing liquid to enter the water distribution device through the liquid inlet pipe 5. Then the washing liquid overflows downward evenly at the upper part of the round straight cylinder of the washing tower 1 through the water distribution device. The washing liquid contacts the alkali dust and water vapor during the descent process, and the washing liquid adsorbs the alkali dust. At the same time, the washing liquid cools the water vapor. Then the washing liquid falls to the lower part of the round straight cylinder of the washing tower 1 and is discharged and collected through the drain pipe 4. The clean gas after washing is discharged through the outlet pipe 3. Since the air inlet pipe 2 is arranged at the top of the washing tower 1, and the height of the air inlet pipe 2 is higher than the height of the water distribution device in the washing tower 1, the air containing alkali dust will not contact the washing liquid near the air inlet pipe 2, so the alkali dust is prevented from scarring and blocking at the mouth of the air inlet pipe 2, ensuring the unobstructed state of the air inlet pipe 2, which is convenient to use and highly practical.

[0024] like Figure 1 The washing tower 1 is composed of an upper head, a lower head and a circular straight cylinder in the middle. The upper and lower heads are fixedly welded and installed at the upper and lower ends of the straight cylinder head respectively. The air inlet pipe is arranged at the top of the upper head of the washing tower 1, and the discharge pipe 4 is arranged at the bottom of the lower head of the washing tower 1. The water distribution device and the filler are arranged in the circular straight cylinder, and the liquid inlet and the exhaust port are arranged at the upper and lower ends of the circular straight cylinder respectively.

[0025] like Figure 2 , Figure 3 and Figure 5The water distribution device includes a trough-type water distributor 6, a water distribution main pipe 7 and a plurality of water distribution branch pipes 8. The trough-type water distributor 6 is fixedly installed in the round straight cylinder of the washing tower 1. A water distribution main trough is arranged in the middle of the trough-type water distributor 6. A plurality of water distribution branch troughs communicating with the water distribution main trough are arranged on both sides of the trough-type water distributor 6. The water distribution main pipe 7 is fixedly installed on the trough-type water distributor 6. The water distribution main pipe 7 is located in the water distribution main trough. The input end of the water distribution main pipe 7 is communicated with the liquid inlet pipe 5. The plurality of water distribution branch pipes 8 are all communicated with the water distribution main pipe 7. The plurality of water distribution branch pipes 8 are respectively located in the plurality of water distribution branch troughs. The left and right sides of the water distribution main pipe 7 are provided with a plurality of drainage holes. The left and right sides of the plurality of water distribution branch pipes 8 are provided with a plurality of drainage holes. There are multiple sets of drainage holes on both sides; when the washing liquid enters the water distribution main pipe 7 through the liquid inlet pipe 5, the washing liquid will enter the multiple sets of water distribution branch pipes 8 through the water distribution main pipe 7, and then the washing liquid will be discharged into the water distribution main tank and the water distribution branch tank through the drainage holes on the water distribution main pipe 7 and the multiple sets of water distribution branch pipes 8 respectively. When the washing liquid in the water distribution main tank and the water distribution branch tank is full, the washing liquid will overflow evenly into the round cylinder of the washing tower 1 through the main water distribution tank and the water distribution branch tank on the trough-type water distributor 6, so that the washing liquid can evenly descend in the round cylinder of the washing tower 1, thereby increasing the contact area between the washing liquid and the gas in the round cylinder of the washing tower 1 and ensuring the washing effect.

[0026] like Figure 1 and Figure 3 The annular tube 9 is fixedly installed on the upper part of the circular cylinder of the washing tower 1, and a plurality of drainage holes are arranged at the lower part of the annular tube 9, which are evenly distributed at the lower part of the annular tube 9. Two groups of output ends are arranged on the liquid inlet pipe 5, and the two groups of output ends of the liquid inlet pipe 5 are respectively connected with the annular tube 9 and the water distribution main pipe 7; the circulating pump is turned on, so that the washing liquid enters the annular tube 9 and the trough water distributor 6 respectively through the two groups of output ends on the liquid inlet pipe 5, and the washing liquid entering the annular tube 9 is discharged through the plurality of drainage holes at the lower end of the annular tube 9 and evenly sprayed on the inner wall of the washing tower 1, and then the washing liquid flows up and down through the inner wall of the washing tower 1, and the washing liquid flushes the inner wall of the washing tower 1, thereby preventing the alkali from forming scars on the inner wall of the washing tower 1, which is convenient to use and highly practical.

[0027] like Figure 1 The spray filler 10 is fixedly installed in the middle of the round cylinder of the washing tower 1, and the spray filler is located below the water distribution device; through the above arrangement, the washing liquid can form a water film on the spray filler 10 after falling on the spray filler 10, thereby increasing the contact area between the washing liquid and the gas in the round cylinder, and improving the washing effect on the gas in the round cylinder of the washing tower 1. At the same time, the gas deflection effect generated by the spray filler 10 can improve the washing efficiency of the alkali dust.

[0028] The spray filler 10 may be a ball ring made of stainless steel with a height of 480-520 mm and a specification of 100*100 mm.

[0029] The distance between the trough water distributor 6 and the spray filler 10 is greater than or equal to 200 mm.

[0030] like Figure 2 The water distribution device of the wet dust removal device is composed of a water distribution trough and a water distribution pipe. The water distribution trough is composed of a main trough and symmetrical water distribution branch troughs at both ends. The water distribution pipe is composed of a main pipe and symmetrical distribution branch pipes at both ends. The distribution pipe is arranged in the water distribution trough. The water distribution branch pipes are evenly connected to the water distribution main pipe, and holes are opened on the left and right sides of the main branch pipe to ensure that the water flow in the water distribution trough is evenly distributed. The main trough and branch trough of the water distribution trough are of the same height and are installed horizontally to ensure that the spray water overflows evenly from the top of the trough. During operation, the airflow containing alkaline dust enters from the upper part of the overflow water, and the dry-wet junction point is above the water surface, which can eliminate the dry-wet junction crystallization boundary area, and there is no fulcrum to form alkali scars; at the same time, the overflow water body is completely covered by the overflow water, which can effectively disperse the airflow evenly and enter the washing area below.

[0031] The height of the trough type water distributor 6 is 100-150 mm, preferably 120 mm.

[0032] like Figure 1 The liquid baffle plate 11 is fixedly installed on the inner wall of the washing tower 1 at an angle, and is located above the outlet pipe 3; through the shielding of the liquid baffle plate 11, the washing liquid falling into the outlet pipe 3 in the round cylinder of the washing tower 1 is reduced, and the washing liquid entering the outlet pipe is reduced.

[0033] The spray filler 10 of the combined alkali production, calcination and alkali transportation wet dust removal device of the utility model is purchased on the market, and technicians in the industry only need to install and operate it according to the accompanying instruction manual, without the need for creative work by technicians in this field.

[0034] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A wet dust removal device for combined alkali production, calcination and alkali transportation, comprising a washing tower (1), wherein the washing tower (1) comprises a round straight cylinder, an upper end cap and a lower end cap, wherein the upper end cap and the lower end cap are respectively mounted on the upper and lower parts of the round straight cylinder, and a chamber is arranged in the round straight cylinder; characterized in that: It also comprises an air inlet pipe (2), an air outlet pipe (3), a liquid discharge pipe (4), a liquid inlet pipe (5) and a water distribution device. The air inlet pipe (2) is mounted on the upper end cap of the washing tower (1). The lower end of the air inlet pipe (2) is in communication with the upper part of the round cylinder of the washing tower (1). The liquid inlet pipe (5) is fixedly mounted on the upper end of the round cylinder. The output end of the liquid inlet pipe (5) is connected to the water distribution device. The water distribution device is mounted on the upper part of the round cylinder. The water distribution device has water distribution and anti-blocking functions. The water distribution device is located below the air inlet pipe (2). The air outlet pipe (3) is mounted on the lower part of the round cylinder. The liquid discharge pipe (4) is mounted on the lower part of the lower end cap of the washing tower (1). The input ends of the air outlet pipe (3) and the liquid discharge pipe (4) are both in communication with the chamber of the round cylinder. The height of the liquid discharge pipe is lower than that of the air outlet pipe.

2. A wet dust removal device for combined alkali production, calcination and alkali transportation as claimed in claim 1, characterized in that: The water distribution device comprises a trough-type water distributor (6), a water distribution main pipe (7) and a plurality of water distribution branch pipes (8). The trough-type water distributor (6) is fixedly installed in the round straight cylinder of the washing tower (1). The trough-type water distributor (6) is provided with a water distribution main trough and a plurality of water distribution branch troughs communicated with the water distribution main trough. The water distribution main pipe (7) is fixedly installed on the trough-type water distributor (6). The water distribution main pipe (7) is located in the water distribution main trough. The input end of the water distribution main pipe (7) is communicated with the liquid inlet pipe (5). The plurality of water distribution branch pipes (8) are communicated with the water distribution main pipe (7). The plurality of water distribution branch pipes (8) are respectively located in the plurality of water distribution branch troughs. The left and right sides of the water distribution main pipe (7) are provided with a plurality of drainage holes. The left and right sides of the plurality of water distribution branch pipes (8) are provided with a plurality of drainage holes.

3. A wet dust removal device for combined alkali production, calcination and alkali transportation as claimed in claim 1, characterized in that: It also comprises an annular tube (9), which is fixedly mounted on the top of the round straight cylinder, and a plurality of groups of drainage holes are arranged at the bottom of the annular tube (9), and the plurality of groups of drainage holes are evenly distributed at the bottom of the annular tube (9); and two groups of output ends are arranged on the liquid inlet pipe (5), and the two groups of output ends of the liquid inlet pipe (5) are respectively connected to the annular tube (9) and the water distribution main pipe (7).

4. A wet dust removal device for combined alkali production, calcination and alkali transportation as claimed in claim 2, characterized in that: It also includes a spray filler (10), which is fixedly installed in the middle of the round straight cylinder of the washing tower (1).

5. A wet dust removal device for combined alkali production, calcination and alkali transportation as claimed in claim 2, characterized in that: The height of the trough-type water distributor (6) is 100-150 mm.

6. A wet dust removal device for combined alkali production, calcination and alkali transportation as claimed in claim 4, characterized in that: The spray filler (10) is a ball ring made of stainless steel and has a height of 480-520 mm.

7. A wet dust removal device for combined alkali production, calcination and alkali transportation as claimed in claim 4, characterized in that: The distance between the trough-type water distributor (6) and the spray filler (10) is greater than or equal to 200 mm.

8. A wet dust removal device for combined alkali production, calcination and alkali transportation as claimed in claim 1, characterized in that: It also comprises a liquid baffle plate (11), which is fixedly installed on the inner wall of the washing tower (1) in an inclined manner, and is located above the air outlet pipe (3).

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