CN115624836A - Granulation tower tail gas purifier - Google Patents

Abstract

The invention relates to the technical field of tail gas treatment equipment, and discloses a prilling tower tail gas purification device, which includes a washing tower. The lower side of the washing tower is provided with a tail gas inlet, and the top is provided with a tail gas discharge port. A gas splitting part, a packing part and an exhaust gas filtering part are arranged on the top; a spray head is arranged between the packing part and the tail gas filtering part; the gas splitting part is a cylinder matching the internal structure of the washing tower Shaped structure, the top of which is concavely formed with an accommodating cavity, and a plurality of guide parts protrude from the accommodating cavity, and the guide part is a net-shaped structure on the top sealing side; the guide part It is connected with the air intake passage at the bottom of the gas diversion part, and a dust absorption part is arranged in the gas passage; the present invention can perform preliminary filtration on the exhaust gas when it passes through the gas diversion part, so as to improve the exhaust gas treatment effect; reduce dust The blockage on the top of the gas splitter reduces the probability of being blocked when the gas flows upwards.

Description

A prilling tower tail gas purification device

technical field

The invention relates to the technical field of tail gas treatment equipment, in particular to a prilling tower tail gas purification device.

Background technique

In the relevant production process of high-tower granulation, due to the problems of equipment and production process, the exhaust gas will contain many polluting liquid droplets and dust. If it is not treated in time and directly discharged, it will cause great damage to the air. , which seriously violates the national requirements for environmental protection; in the prior art, in the process of treating the tail gas of the prilling tower, in order to ensure the uniformity of gas distribution when the gas rises inside the scrubber, deflectors are usually installed, but in the prior art The deflector can only guide the gas, and cannot perform preliminary filtration on the gas when the gas rises, so as to achieve the purpose of preliminary removal of dust, increase the difficulty of subsequent treatment, and reduce the treatment effect; in addition, the deflector in the prior art provides The through holes for the exhaust gas to flow out are all set on the top of the deflector, and the exhaust gas flows straight up after passing through the deflector. Fluidity during treatment reduces the efficiency of tail gas treatment.

Contents of the invention

The purpose of the present invention is to provide a prilling tower tail gas purification device, which can perform preliminary filtration on the tail gas when it passes through the gas splitter, so as to reduce the difficulty of subsequent processing and improve the tail gas treatment effect; The guide part is provided to reduce the clogging of the top end of the gas diversion part by dust, and reduce the probability of gas being blocked when the gas flows upward.

The present invention adopts following technical scheme:

A prilling tower tail gas purification device, comprising a washing tower, the lower side of the washing tower is provided with a tail gas inlet, and the top is provided with a tail gas discharge port, and the washing tower is sequentially provided with a gas diversion part, a packing part and a Exhaust gas filtering part; a spray head connected to the filtered water source is arranged between the packing part and the exhaust gas filtering part; the gas splitting part is a cylindrical structure matching the internal structure of the washing tower, which The accommodating cavity is formed in the top concave, and a number of guide parts protrude from the accommodating cavity, and the guide part is a net-like structure on the sealing side of the top end; the guide part and the gas The air intake channel at the bottom of the splitter part is conducted, and a dust absorbing part is arranged in the gas channel.

Preferably, the dust absorbing part includes a support rod arranged in the gas channel, and the support rod is provided with multiple sets of dust removal filter elements through which the gas can pass.

Preferably, each of the dust-removing filter elements takes the support rod as the center of a circle, and is in a diverging state inclined upward.

Preferably, the size of the dust removal filter element gradually increases from bottom to top.

Preferably, the flow guide part is a cylindrical structure, and the top end of the flow guide part is provided with an arc-shaped sealing top surface.

Preferably, an annular gas passage is provided in the gas distribution part outside the accommodation chamber, and a down blower communicating with the gas passage is provided on the side wall of the gas distribution part outside the accommodation chamber. The gas port, the lower gas blowing port is arranged obliquely downward; the top of the gas diversion part is provided with a lower gas pipe connected to the gas channel, and the lower gas pipe is connected to an external gas source.

Preferably, the packing part includes a support ring with an annular cavity inside, a packing frame is arranged in the middle of the support ring, and packing is arranged in the packing frame; , the gas delivery ring is in communication with an external air source, the gas delivery ring is provided with an upper air pipe, the upper air pipe is in communication with the support ring, and the inner wall of the support ring is provided with an upwardly inclined upper air blowing port .

Preferably, both the lower blowing port and the upper blowing port are provided with dust-proof nets.

Preferably, the packing frame is an upwardly convex arc-shaped structure, and the connection between the bottom of the packing frame and the support ring is set as a transition slope inclined toward the center of the support ring.

Preferably, a collection box is connected to the bottom of the washing tower, and the collection box is connected to a water pipe arranged outside the washing tower through a water delivery pump, and the water pipe is connected to the spraying water pipe arranged in the washing tower. Head conduction

Compared with the prior art, the beneficial effect of the present invention is that: the present invention sets a dust absorbing part in the gas channel at the bottom of the gas distribution part, and can perform primary filtration on the tail gas when it passes through the gas distribution part, and the dust of large particles is passed through the gas distribution part. The dust absorption part is filtered to reduce the difficulty of subsequent treatment of exhaust gas and ensure the effect of exhaust gas treatment; by setting the diversion part with a mesh structure at the top of the gas diversion part, it is convenient for exhaust gas to flow out from the circumference of the diversion part, increasing the The space for the exhaust gas to flow out avoids the situation that the top of the gas splitter is blocked by the accumulation of dust, which affects the upward flow of the exhaust gas.

Description of drawings

Fig. 1 is the structural representation of the embodiment of the present application;

Fig. 2 is a schematic structural view of the gas splitter of the embodiment of the present application;

Fig. 3 is a schematic diagram of the internal structure of the gas splitter of the embodiment of the present application;

Fig. 4 is a schematic diagram of the connection between the gas distribution part and the gas transfer ring according to the embodiment of the present application.

Detailed ways

The present invention will be described clearly and completely below in conjunction with accompanying drawing and embodiment:

As shown in Figures 1 to 4, a prilling tower tail gas purification device according to the present invention includes a washing tower 1, a tail gas inlet 2 is arranged on the lower side of the washing tower 1, and a tail gas discharge port 3 is arranged on the top end of the washing tower. 1 is provided with a gas splitter 4 in order from bottom to top, which is used to divert the tail gas entering the scrubber 1, so that it can be more evenly distributed in the scrubber 1, and prevent the bias flow of the tail gas in the scrubber 1; packing Part 5 is used to increase the gas-liquid contact surface, improve mass transfer efficiency, and improve the purification effect of tail gas; the tail gas filter part generally uses a wire mesh demister to remove the liquid droplets entrained in the tail gas in time to ensure mass transfer Efficiency, to ensure the discharge of tail gas up to standard; between the filler part 5 and the tail gas filter part, a spray head connected to the filtered water source is arranged, and the spray head is connected to the collection box 6 arranged at the bottom of the washing tower 1 through the water pipe, and the water pipe A water delivery pump 7 is also arranged between the collection box 6. The collection box 6 is used to collect the spray liquid. The collected liquid is treated in the collection box 6 and then transported to the washing tower 1 by the water delivery pump 7 for recycling. , to reduce the waste of water sources; among them, a filter screen is also provided at the communication part between the water delivery pump 7 and the collection box 6, which is used to filter out the dust in the collected liquid, so as not to cause blockage to the spray head; the bottom of the collection box 6 has a The side is also provided with a discharge port 8, so that the dust accumulated in it is removed regularly. A fan is also arranged on the top of the washing tower 1 to assist in discharging the treated tail gas.

The gas splitter 4 is a cylindrical structure that matches the internal structure of the washing tower 1, and its top is concavely formed with an accommodating cavity 9, which can temporarily accommodate the spray liquid and the dust washed down from the exhaust gas , and then smoothly flow out from the bottom of the diversion part 10 into the collection box 6; a plurality of diversion parts 10 are protrudingly arranged in the accommodating chamber 9, and the diversion part 10 is a net-shaped structure on the top sealing side, which is convenient for exhaust gas Flow out from the circumference, increase the outflow channel of the exhaust gas, reduce the probability that the dust washed and fallen by the washing liquid will block the exhaust gas outlet, and ensure the washing efficiency; preferably, the guide part 10 is a cylindrical structure to ensure the smooth transition of its circumference, Avoid the accumulation of dust at the corners of the bottom of the structure with sharp edges and corners. In addition, the top of the guide part 10 is provided with a circular arc-shaped sealing top surface, which can prevent the dust from being washed by the washing liquid from accumulating on it. When the spray liquid falls on it, it can provide a diversion effect for the whereabouts of the spray liquid, and the dust can flow down along its arc surface along with the scouring of the spray liquid; each diversion part 10 is connected to the bottom of the gas diversion part 4 The air intake channel 11 at the end is connected, and a dust absorbing part is arranged in the air intake channel 11 .

The dust absorbing part is used to filter and remove the exhaust gas that enters the washing tower 1 for the first time, so as to reduce the difficulty of subsequent treatment of the dust in the exhaust gas; The rod 13 is installed inside the air intake channel 11, and the support rod 12 is provided with multiple sets of dust removal filter elements 14 for the gas to pass through. The dust removal filter elements 14 can be made of the same material as the dust removal filter bag to filter the exhaust gas flowing through; , each dust removal filter element 14 takes the support rod 12 as the center of a circle, and is in an upwardly diverging state to reduce the resistance when the exhaust gas flows upward; preferably, the size of the dust removal filter element 14 gradually increases from bottom to top, so as to ensure the dust removal effect At the same time, it reduces the resistance when the exhaust gas rises and improves the efficiency of exhaust gas treatment.

Further, an annular gas passage 15 is provided in the gas distribution part 4 outside the accommodation cavity 9, and a plurality of lower blowing ports 16 communicating with the gas passage 15 are provided on the side wall of the gas distribution part 4 outside the accommodation chamber 9 , the lower blowing port 16 is set obliquely downward to ensure that the gas blown from the lower blowing port 16 acts obliquely downward to the bottom position of the flow guide part 10 in the accommodating part, so that the dust accumulated here that is inconvenient to fall under the action of the high-pressure gas The bottom is blown out along the mesh holes in the 10 circles of the flow guide part; the top of the gas diversion part 4 is provided with a lower gas pipe 17 connected to the gas channel 15, and the lower gas pipe 17 is connected to an external gas source.

The packing part 5 includes a support ring 5-1 with an annular cavity inside, a packing frame 5-2 is arranged in the middle of the top of the support ring 5-1, and packing is arranged in the packing frame 5-2. The plastic filler has the advantages of corrosion resistance, light weight, low price, easy availability of raw materials, good toughness and impact resistance; in addition, the connection between the bottom of the filler frame 5-2 and the support ring 5-1 is set to the center of the support ring 5-1 The transitional slope 5-3 with an inclined direction allows the spray liquid to flow down and prevent the accumulation of the spray liquid; the top of the lower air pipe 17 is connected with an air transmission ring 18, and the air transmission ring 18 is connected to the external air source, and the air transmission The ring 18 is provided with an upper air pipe 19, the upper air pipe 19 communicates with the support ring 5-1, and the inner wall of the support ring 5-1 is provided with an upward blowing port, which is not shown in the figure, and the upward blowing port is not shown in the figure. The upper air blowing port can apply high-pressure gas blowing to the bottom of the upwardly convex packing frame 5-2, blow off the dust accumulated in the packing layer in time, ensure the contact area between gas and liquid, and improve the mass transfer efficiency. In this embodiment, both the lower blowing port 16 and the upper blowing port are provided with a dust-proof net 20 to prevent dust from splashing into the inside and causing blockage thereof, thereby improving the practicability of the present invention.

When the present invention is in use, the tail gas is first passed into the scrubber 1 through the tail gas inlet 2, and at the same time, the spray head and the fan are turned on to work, and then the tail gas will pass through the gas diversion part 4, the packing part 5 and the tail gas filter part in sequence , and finally discharged from the washing tower 1 under the action of the fan; when the packing part 5 and the gas splitting part 4 need to be processed regularly, the introduction of the exhaust gas and the spraying of the spray head can be stopped first, and the gas source can be started to The packing frame 5-2 of the packing part 5 and the guide part 10 in the accommodating chamber 9 are purged to blow off the accumulated dust, which facilitates the subsequent exhaust gas treatment.

Claims (10)

1. The utility model provides a prilling tower tail gas purifier which characterized in that: the washing tower is internally provided with a gas flow dividing part, a filling part and a tail gas filtering part from bottom to top in sequence; a spray header communicated with a filtered water source is arranged between the filler part and the tail gas filtering part; the gas flow dividing part is of a cylindrical structure matched with the internal structure of the washing tower, the top of the gas flow dividing part is concave inwards to form an accommodating cavity, a plurality of flow guide parts are arranged on the accommodating cavity in a protruding mode, and the flow guide parts are of a structure with the top end sealed and the periphery of the flow guide parts being meshed; the diversion part is communicated with an air inlet channel at the bottom end of the air diversion part, and a dust absorption part is arranged in the air inlet channel.

2. The prilling tower tail gas cleanup device according to claim 1, wherein: the dust absorption part comprises a support rod arranged in the gas channel, and a plurality of groups of dust removal filter cores capable of allowing gas to pass are arranged on the support rod.

3. The prilling tower tail gas cleanup device according to claim 2, wherein: each dust removal filter core takes the support rod as a circle center and is in an inclined and upward divergent state.

4. The prilling tower tail gas cleanup device according to claim 3, wherein: the size of the dust removal filter element is gradually increased from bottom to top.

5. The prilling tower tail gas cleanup device according to claim 1, wherein: the flow guide part is of a cylindrical structure, and the top end of the flow guide part is provided with a circular arc-shaped sealing top surface.

6. The prilling tower tail gas purification device according to claim 1, characterized in that: an annular gas channel is arranged in the gas flow dividing part outside the accommodating cavity, a lower gas blowing opening communicated with the gas channel is arranged on the side wall of the gas flow dividing part outside the accommodating cavity, and the lower gas blowing opening is obliquely arranged downwards; the top of the gas flow dividing part is provided with a lower gas pipe communicated with the gas channel, and the lower gas pipe is communicated with an external gas source.

7. The prilling tower tail gas cleanup device according to claim 6, wherein: the packing part comprises a support ring with an annular cavity arranged inside, a packing frame is arranged in the middle of the support ring, and packing is arranged in the packing frame; the top end of the lower air pipe is communicated with an air conveying ring, the air conveying ring is communicated with an external air source, an upper air pipe is arranged on the air conveying ring, the upper air pipe is communicated with the support ring, and an upward blowing opening inclined upwards is arranged on the inner wall of the support ring.

8. The prilling tower tail gas cleanup device according to claim 7, wherein: and dust screens are arranged on the lower air blowing port and the upper air blowing port.

9. The prilling tower tail gas purification device according to claim 7, characterized in that: the joint of the bottom of the packing frame and the support ring is provided with a transition slope surface inclined towards the center direction of the support ring.

10. The prilling tower tail gas cleanup device according to claim 1, wherein: the bottom of the washing tower is provided with a collecting box in a communicating mode, the collecting box is communicated with a water pipe arranged outside the washing tower through a water delivery pump, and the water pipe is communicated with a spray header arranged in the washing tower.

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