CN215742843U - Sulfonated tail gas treatment device - Google Patents
Sulfonated tail gas treatment device Download PDFInfo
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- CN215742843U CN215742843U CN202122414797.8U CN202122414797U CN215742843U CN 215742843 U CN215742843 U CN 215742843U CN 202122414797 U CN202122414797 U CN 202122414797U CN 215742843 U CN215742843 U CN 215742843U
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Abstract
The utility model relates to a sulfonated tail gas treatment device, which mainly solves the technical problem of poor tail gas demisting effect of an electrostatic demister in the prior art, and adopts a sulfonated tail gas treatment device comprising an electrostatic demister (2), wherein the electrostatic demister comprises a sulfonated tail gas inlet channel (3), an electrostatic demister tail gas outlet (1) and an electrostatic demister liquid outlet (6), and is characterized in that the sulfonated tail gas inlet channel (3) is provided with a water spray inlet (4).
Description
Technical Field
The utility model relates to a sulfonated tail gas treatment device.
Background
In the sulfonation reactor, with SO3And (diluting with dry air) to obtain sulfonating agent, sulfonating organic materials such as fatty alcohol or fatty alcohol-polyoxyethylene ether to obtain sulfonated material, and gas-liquid separating the sulfonated material in the sulfonation reactor with a gas-liquid standing separator to obtain gas-phase material, i.e. sulfonated tail gas. The sulfonated tail gas contains airAnd entrained SO2、SO3The sulfuric acid ester and other substances are treated and then discharged after reaching the standard, and the prior treatment process mainly comprises the step of removing sulfuric acid ester acid mist and SO from the sulfonated tail gas by an electrostatic demister3Then removing SO by an alkaline tower2And then the wastewater is discharged after reaching the standard. However, in the process of treating sulfonated tail gas in the prior art, sulfuric acid ester carried in tail gas of the electrostatic demister enters the alkaline tower due to poor treatment effect of the electrostatic demister, SO that a large amount of foam is generated in the alkaline tower, and SO is influenced2The absorption also causes a large amount of consumption of spray water, and the recovery liquid of the alkaline tower also causes increased difficulty of post-treatment due to the existence of a large amount of organic matters.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problem that the effect of an electrostatic demister on treating sulfonated tail gas in the prior art is poor, and provides a novel sulfonated tail gas treatment device.
In order to achieve the purpose, the technical scheme of the utility model is as follows:
the sulfonated tail gas treatment device comprises an electrostatic demister (2), wherein the electrostatic demister comprises a sulfonated tail gas inlet channel (3), an electrostatic demister tail gas outlet (1) and an electrostatic demister liquid outlet (6), and the sulfonated tail gas inlet channel (3) is provided with a water spraying inlet (4).
Because the sulfonated tail gas inlet channel (3) is provided with the water spraying inlet (4), compared with the prior art, the utility model has the advantages of good tail gas demisting effect of the electrostatic demister, low foam of a downstream alkaline tower and low organic matter content of a recycle liquid of the alkaline tower.
In the above technical solution, preferably, the sulfonated tail gas treatment device includes an alkaline tower (2), and the tail gas outlet (1) of the electrostatic demister is input to the gas inlet (9) of the alkaline tower.
In the above technical solution, preferably, the caustic tower (2) is provided with a lye supplement port (14).
In the above technical solution, preferably, the caustic tower is provided with a caustic overflow port (13).
In the above technical scheme, preferably, the alkaline tower (2) is provided with an alkaline liquor circulation channel (10), and the alkaline liquor circulation channel takes out alkaline liquor from the bottom of the alkaline tower and conveys the alkaline liquor back to the top of the alkaline tower.
In the above technical solution, preferably, the lye circulation channel (10) is provided with a lye circulation pump (11).
In the above technical solution, preferably, a liquid spraying device (17) is disposed at an upper portion inside the alkaline tower (2), and an end of the alkaline circulation channel (10) returning to the alkaline tower is communicated with the liquid spraying device (17).
In the above technical solution, preferably, the gas inlet (9) of the caustic tower is located lower than the liquid spraying device (17). And a packed bed (15) is preferably arranged between the liquid spraying device (17) and the gas inlet (9) of the alkaline tower, so that the gas flow entering the alkaline tower (2) is fully contacted with the alkaline liquor sprayed by the liquid spraying device, and the alkaline washing effect is improved.
In the above technical solution, preferably, a waste liquid outlet (12) of the caustic washing tower is arranged at the lowest point of the caustic washing tower (2). The caustic tower waste outlet may also be located at any other location deemed suitable by those skilled in the art, such as, but not limited to, locating the caustic tower waste outlet on the caustic recirculation path.
In the above technical solution, preferably, a gas outlet (18) of the caustic tower is arranged at the highest point of the caustic tower (2).
For convenience of comparison, in the examples and comparative examples of the embodiment of the present invention, the sources of the sulfonated tail gas are: with SO3And (diluting with dry air) to obtain sulfonating agent, sulfonating fatty alcohol to obtain sulfonated material, and gas-liquid separating the sulfonated material in the sulfonation reactor in a gas-liquid standing separator to obtain gas-phase material.
The evaluation of the electrostatic demisting effect can be carried out by measuring the content of the anionic surfactant in the alkaline tower waste liquid, and under the comparable condition, the lower the content of the anionic surfactant in the alkaline tower waste liquid is, the better the electrostatic demisting effect is, and conversely, the higher the content of the anionic surfactant in the alkaline tower waste liquid is, the worse the electrostatic demisting effect is.
The method for measuring the content of the anionic surfactant in the waste liquid of the alkaline washing tower comprises the following steps:
except that the step of dripping the sodium hydroxide solution in section 6.3.1 in GB7494-87 (determination of water quality anionic surfactant by methylene blue spectrophotometer) is omitted (namely, section 6.3.1 is specifically changed into 'a sample is transferred to a separating funnel, and 0.5mol/L sulfuric acid (3.2) is dripped into the sample by taking phenolphthalein (3.8) as an indicator until peach red just disappears', the content of the anionic surfactant in the waste liquid of the alkaline washing tower is determined by the GB7494-87 method, and the content of the anionic surfactant is calculated by LAS.
The utility model is described in detail below with reference to the figures and the detailed description.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention:
fig. 2 is a schematic diagram of a prior art apparatus.
In fig. 1 and 2:
1 is a tail gas outlet of an electrostatic demister; 2 is an electrostatic demister; 3 is a sulfonated tail gas inlet channel; 4 is a water injection inlet; 5 is a collecting pipe; 6 is a liquid outlet of the electrostatic demister; 7 is an electrode wire; 8 is a circulating alkali liquor inlet; 9 is a gas inlet of the alkaline washing tower; 10 is an alkali liquor circulating channel; 11 is an alkali liquor circulating pump; 12 is a waste liquid outlet of the alkaline washing tower; 13 is an alkali liquor overflow port; 14 is an alkali liquor replenishing port; 15 is a packed bed; 16 is an alkaline washing tower; 17 is a liquid spraying device; and 18 is a gas outlet of the alkaline washing tower.
Detailed Description
Implementation mode of sulfonated tail gas treatment device adopted by invention
See fig. 1.
Sulfonated tail gas processing apparatus, including electrostatic demister (2), electrostatic demister includes sulfonated tail gas inlet channel (3), electrostatic demister tail gas outlet (1) and electrostatic demister liquid outlet (6), and sulfonated tail gas inlet channel (3) set up water and spout entry (4).
The sulfonated tail gas treatment device comprises an alkaline tower (2), and a tail gas outlet (1) of the electrostatic demister is input into a gas inlet (9) of the alkaline tower.
The alkaline tower (2) is provided with an alkaline liquid supplement port (14).
The alkali wash tower (2) is provided with an alkali liquor overflow port (13).
The alkali washing tower (2) is provided with an alkali liquor circulating channel (10), and alkali liquor is taken out from the bottom of the alkali washing tower through the alkali liquor circulating channel and is conveyed back to the top of the alkali washing tower.
The alkali liquor circulating channel (10) is provided with an alkali liquor circulating pump (11).
And a liquid spraying device (17) is arranged at the upper part in the alkaline tower (2), and the end of the alkaline liquor circulating channel (10) returning to the alkaline tower is communicated with the liquid spraying device (17).
The gas inlet (9) of the alkaline tower is positioned lower than the liquid spraying device (17).
A packed bed (15) is arranged between the liquid spray device (17) and the gas inlet (9) of the alkaline tower.
And an alkaline tower waste liquid outlet (12) is arranged at the lowest point of the alkaline tower (2).
And a gas outlet (18) of the alkaline washing tower is arranged at the highest point of the alkaline washing tower (2).
In the following examples of the present invention,
the mechanical parameters of the electrostatic demister are as follows: the inner diameter of the collecting pipe is 165 mm; the number of the collecting pipes is 175; the length of the accumulation pipe gap is 79 mm; the effective tube length of the collecting tube is 3 m.
The electrical control parameters of the electrostatic demister are as follows: the alternating voltage is 380V; the direct-current voltage is 20 KV; the average electric field intensity is 2.5 KV/cm.
The mechanical parameters of the caustic wash tower are as follows:
the alkaline washing tower is a spray tower, and the specification of the spray tower is phi 1800mm x 7360 mm; the packing of the packed bed 15 is plastic pall rings 25mm by 25mm, and the height of the packing layer is 2800 mm. The liquid spray device 17 is a nozzle, and the spray angle of the nozzle is 95 °.
[ examples ] A method for producing a compound
(I) 7100kg/h of sulfonated tail gas (the composition of the sulfonated tail gas: 0.16% by weight of sulfate, SO) from the sulfonated tail gas inlet channel 330.29% by weight, SO20.33% by weight) was mixed with water injected from the water injection inlet 4 at 10kg/h and then fed to the electrostatic mist eliminator 2.
The working temperature of the electrostatic demister is 55 ℃.
(II) inputting the tail gas of the electrostatic demister discharged from the tail gas outlet 1 of the electrostatic demister into an alkaline tower 16, controlling the working temperature of the alkaline tower to be 25 ℃, and controlling the amount of the alkali filling liquid in the spray tower to be 6m3The alkali liquor is 6.5% sodium hydroxide aqueous solution (32% sodium hydroxide aqueous solution is added into the alkali wash tower through an alkali liquor supplement port 14 to maintain the concentration of the alkali liquor in the tower), and the spraying flow is 70m3/h。
The device runs for 6 hours, a waste liquid sample is taken from a waste liquid outlet (12) of the alkaline washing tower, and the content of the anionic surfactant in the waste liquid is 16.3mg/L through measurement.
Prior art embodiments
See fig. 2.
The sulfonated tail gas treatment apparatus is identical to the above-described embodiment except that the water injection inlet (4) is not provided.
The sulfonated tail gas treatment device comprises an electrostatic demister (2), wherein the electrostatic demister comprises a sulfonated tail gas inlet channel (3), an electrostatic demister tail gas outlet (1) and an electrostatic demister liquid outlet (6).
The sulfonated tail gas treatment device comprises an alkaline tower (2), and a tail gas outlet (1) of the electrostatic demister is input into a gas inlet (9) of the alkaline tower.
The alkaline tower (2) is provided with an alkaline liquid supplement port (14).
The alkali wash tower (2) is provided with an alkali liquor overflow port (13).
The alkali washing tower (2) is provided with an alkali liquor circulating channel (10), and alkali liquor is taken out from the bottom of the alkali washing tower through the alkali liquor circulating channel and is conveyed back to the top of the alkali washing tower.
The alkali liquor circulating channel (10) is provided with an alkali liquor circulating pump (11).
And a liquid spraying device (17) is arranged at the upper part in the alkaline tower (2), and the end of the alkaline liquor circulating channel (10) returning to the alkaline tower is communicated with the liquid spraying device (17).
The gas inlet (9) of the alkaline tower is positioned lower than the liquid spraying device (17).
A packed bed (15) is arranged between the liquid spray device (17) and the gas inlet (9) of the alkaline tower.
And an alkaline tower waste liquid outlet (12) is arranged at the lowest point of the alkaline tower (2).
And a gas outlet (18) of the alkaline washing tower is arranged at the highest point of the alkaline washing tower (2).
The mechanical parameters of the electrostatic mist eliminator, the electrical operating parameters of the electrostatic mist eliminator, and the mechanical parameters of the caustic tower in the following comparative examples were the same as in the above examples, namely:
the mechanical parameters of the electrostatic demister are as follows: the inner diameter of the collecting pipe is 165 mm; the number of the collecting pipes is 175; the length of the accumulation pipe gap is 79 mm; the effective tube length of the collecting tube is 3 m.
The electric operating parameters of the electrostatic demister are as follows: the alternating voltage is 380V; the direct-current voltage is 20 KV; the average electric field intensity is 2.5 KV/cm.
The mechanical parameters of the caustic wash tower are as follows:
the alkaline washing tower is a spray tower, and the specification of the spray tower is phi 1800mm x 7360 mm; the packing of the packed bed 15 is plastic pall rings 25mm by 25mm, and the height of the packing layer is 2800 mm. The liquid spray device 17 is a nozzle, and the spray angle of the nozzle is 95 °.
[ COMPARATIVE EXAMPLE ]
(I) 7100kg/h of sulfonated tail gas (the composition of the sulfonated tail gas: 0.16% by weight of sulfate, SO) from the sulfonated tail gas inlet channel 330.29% by weight, SO20.33% by weight) was fed into the electrostatic precipitator 2.
The working temperature of the electrostatic demister is 55 ℃.
(II) inputting the tail gas of the electrostatic demister discharged from the tail gas outlet 1 of the electrostatic demister into an alkaline tower 16, controlling the working temperature of the alkaline tower to be 25 ℃, and controlling the amount of the alkali filling liquid in the spray tower to be 6m3The alkali liquor is 6.5% sodium hydroxide aqueous solution (32% sodium hydroxide aqueous solution is added into the alkali wash tower through an alkali liquor supplement port 14 to maintain the concentration of the alkali liquor in the tower), and the spraying flow is 70m3/h。
The device runs for 6 hours, a waste liquid sample is taken from a waste liquid outlet (12) of the alkaline washing tower, and the content of the anionic surfactant in the waste liquid is 79.2mg/L through measurement.
It should be noted that the above-mentioned embodiments are only for explaining the present invention, and do not constitute any limitation to the present invention. The present invention has been described with reference to exemplary embodiments, but the words which have been used herein are words of description and illustration, rather than words of limitation. The utility model can be modified, as prescribed, within the scope of the claims and without departing from the scope and spirit of the utility model. Although the utility model has been described herein with reference to particular means, materials and embodiments, the utility model is not intended to be limited to the particulars disclosed herein, but rather extends to all other methods and applications having the same functionality.
Claims (12)
1. Sulfonated tail gas processing apparatus, including electrostatic demister (2), electrostatic demister includes sulfonated tail gas inlet channel (3), electrostatic demister tail gas outlet (1) and electrostatic demister liquid outlet (6), characterized by sulfonated tail gas inlet channel (3) set up water and spout entry (4).
2. The sulfonated tail gas treatment device according to claim 1, wherein the sulfonated tail gas treatment device comprises a caustic tower (16), and the tail gas outlet (1) of the electrostatic demister is input into a gas inlet (9) of the caustic tower.
3. The sulfonated exhaust gas treatment device according to claim 2, wherein the caustic tower (16) is provided with a lye supply port (14).
4. The sulfonated tail gas treatment device according to claim 2, wherein the caustic tower is provided with a lye overflow port (13).
5. The sulfonated tail gas treatment device according to claim 2, wherein the caustic tower (16) is provided with a lye circulation channel (10), and the lye circulation channel takes lye from the bottom of the caustic tower and returns the lye from the top of the caustic tower.
6. The sulfonated tail gas treatment device according to claim 5, wherein the lye circulation channels (10) are provided with a lye circulation pump (11).
7. The sulfonated tail gas treatment device according to claim 6, wherein a liquid spraying device (17) is arranged at the upper part in the caustic tower (16).
8. The sulfonated tail gas treatment device according to claim 7, wherein the end of the alkali liquor circulation channel (10) returning to the caustic tower is communicated with a liquid spraying device (17).
9. The sulfonated tail gas treatment apparatus according to claim 8, wherein the caustic tower gas inlet (9) is located lower than the liquid spray device (17).
10. The sulfonated tail gas treatment device according to claim 9, wherein a packed bed (15) is arranged between the liquid spraying device (17) and the caustic tower gas inlet (9).
11. The sulfonated tail gas treatment device according to claim 2, wherein a caustic tower waste liquid outlet (12) is arranged at the lowest point of the caustic tower (16).
12. The sulfonated exhaust gas treatment device according to claim 2 or 11, wherein a caustic tower gas outlet (18) is provided at the top of the caustic tower (16).
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| CN113798062A (en) * | 2021-10-09 | 2021-12-17 | 上海奥威日化有限公司 | Sulfonated tail gas treatment method |
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| CN113798062A (en) * | 2021-10-09 | 2021-12-17 | 上海奥威日化有限公司 | Sulfonated tail gas treatment method |
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