CN211328762U - Energy-saving hydrochloric acid tail gas purification device that multistage cooling separation was retrieved - Google Patents
Energy-saving hydrochloric acid tail gas purification device that multistage cooling separation was retrieved Download PDFInfo
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- CN211328762U CN211328762U CN201921108097.2U CN201921108097U CN211328762U CN 211328762 U CN211328762 U CN 211328762U CN 201921108097 U CN201921108097 U CN 201921108097U CN 211328762 U CN211328762 U CN 211328762U
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Abstract
The utility model discloses an energy-saving hydrochloric acid tail gas purification device that multistage cooling separation was retrieved belongs to hydrochloric acid tail gas clean-up equipment technical field. The washing tank is connected with the water mist cooler, the descaling bath is connected with first vapour and liquid separator through the acid mist cooler, and first vapour and liquid separator's liquid outlet and acid circulation jar are connected, water mist cooler and first vapour and liquid separator pass through pipeline and are connected with fourth vapour and liquid separator, this energy-saving hydrochloric acid tail gas purification device that multistage cooling separation retrieved is through addding water mist cooler and vapour and liquid separator, realize the reutilization of washing tank steam, prevent the self temperature rise of acid mist purifying tower, avoid producing secondary acid gas pollution, improve whole purifying effect, realize the biggest recycle of HCL, thereby reduce the purifying tower and trade the water frequency and reduce water consumption and water handling capacity, improve simultaneously because inside and outside difference in temperature is too big winter, and then the problem of a large amount of steam of chimney discharge that produces.
Description
Technical Field
The utility model relates to an energy-saving hydrochloric acid tail gas purification device that multistage cooling separation was retrieved belongs to hydrochloric acid tail gas clean-up equipment technical field.
Background
After acid mist generated by the pickling tank is cooled by an acid mist cooler and is separated by a gas-liquid separator, a large amount of HCL gas still needs to enter an acid mist purification tower for purification treatment, so that the acid concentration in the purification tower is increased quickly, and the emission can reach the standard only by replacing and supplementing a large amount of water;
the cleaning water in the cleaning tank has a certain temperature, and the heat is directly brought into the purification tower along with the overflow of water vapor, so that the temperature of the absorption liquid in the acid mist purification tower is gradually increased, and the absorption liquid in the purification tower generates steam, and the generated secondary steam causes secondary pollution because the absorption liquid is used for absorbing residual HCL gas and has certain acidity. In order to solve the problem, the purpose of reducing the acid concentration of the absorption liquid and cooling the absorption liquid is achieved by increasing the water exchange frequency of the purification tower. Meanwhile, the problem that a chimney discharges a large amount of water vapor is caused due to overlarge temperature difference between the inside and the outside in winter, and the situation that little rain (snow) is generated near the chimney in serious cases.
The problems that the emission numerical value after the hydrochloric acid tail gas purification treatment is not easy to reach the standard, the water consumption is high, the HCL loss is serious, the water treatment capacity is high, the temperature rise of the purification tower generates secondary pollution, and a chimney discharges a large amount of water vapor due to overlarge internal and external temperature difference are directly caused by the aspects.
SUMMERY OF THE UTILITY MODEL
To the above problem, the to-be-solved technical problem of the utility model is to provide an energy-saving hydrochloric acid tail gas cleanup unit that multistage cooling separation was retrieved.
The utility model discloses an energy-saving hydrochloric acid tail gas purification device of multistage cooling separation recovery, it contains washing tank, water smoke cooler, descaling bath, acid mist cooler, first vapour and liquid separator, acid circulating tank, conveying line, fourth vapour and liquid separator, washing waste liquid jar, acid mist purifying tower, second vapour and liquid separator, acid mist fan, third vapour and liquid separator and chimney, the washing tank is connected with the water smoke cooler, the descaling bath is connected with first vapour and liquid separator through the acid mist cooler, and the liquid outlet of first vapour and liquid separator is connected with the acid circulating tank, water smoke cooler and first vapour and liquid separator are connected with fourth vapour and liquid separator through the conveying line, fourth vapour and liquid separator liquid outlet is connected with washing waste liquid jar, fourth vapour and liquid separator's gas outlet is connected with the acid mist purifying tower, the acid mist purifying tower is connected with the acid mist fan through second vapour and liquid separator, the acid mist fan is connected with the chimney through a third gas-liquid separator;
the water mist cooler is a floating tube type graphite heat exchanger and comprises a shell, end sockets, graphite tubes, baffle plates, a cooling water inlet, a cooling water outlet, a water mist outlet and a water mist inlet, wherein the shell is internally provided with a plurality of graphite tubes and a plurality of baffle plates;
the first gas-liquid separator, the fourth gas-liquid separator, the second gas-liquid separator and the third gas-liquid separator are identical in internal structure, the first gas-liquid separator comprises a separator shell, a hand hole, polyhedral hollow ball filler, separator baffle plates, a liquid discharge port, a defogging layer, a tail gas inlet and a tail gas inlet, the hand hole is formed outside the separator shell, the polyhedral hollow ball filler is filled in the separator shell, the baffle plates of the separators are longitudinally distributed in the separator shell in a staggered manner, the tail gas inlet and the tail gas inlet are respectively formed in the left side and the right side of the separator shell, and the defogging layer is arranged at the inlet of the tail gas inlet;
the acid mist purification tower comprises a water storage layer, an absorption liquid cooling device, an acid mist purification tower main body, a primary circulating spraying layer, a primary filler absorption layer, a secondary circulating spraying layer, a pore plate diffusion layer, a secondary filler absorption layer, a water replenishing spraying layer, a primary defogging layer, a secondary defogging layer, a tertiary defogging layer, a water replenishing adjusting and filtering device and a water outlet filtering device, wherein the water storage layer is arranged at the lower part of the acid mist purification tower main body, the absorption liquid cooling device is arranged in the water storage layer, the primary filler absorption layer and the secondary filler absorption layer are arranged in the middle of the acid mist purification tower main body, the primary circulating spraying layer is positioned below the primary filler absorption layer, the secondary circulating spraying layer is positioned below the secondary filler absorption layer, the pore plate diffusion layer is arranged between the secondary circulating spraying layer and the secondary filler absorption layer, and the water replenishing spraying layer is arranged above the secondary filler absorption layer, and the moisturizing sprays the layer top and is provided with one-level defogging layer, acid mist purification tower main part top is provided with second grade defogging layer and tertiary defogging layer, the moisturizing mouth department of acid mist purification tower main part is provided with the moisturizing and adjusts filter equipment, the delivery port department of acid mist purification tower main part is provided with delivery port filter equipment.
Preferably, an air pipe is arranged above the second gas-liquid separator, and an air valve is arranged on the air pipe.
Preferably, the liquid outlets of the second gas-liquid separator and the third gas-liquid separator are connected with the acid mist purification tower.
Compared with the prior art, the beneficial effects of the utility model are that: this energy-saving hydrochloric acid tail gas purification device that multistage cooling separation retrieved realizes the reutilization of washing tank steam through addding water smoke cooler and vapour and liquid separator, prevents the self temperature rise of acid mist purifying column, avoids producing secondary acid gas pollution, improves whole purifying effect, realizes the recycle of HCL at utmost, thereby it reduces water consumption and water treatment capacity to reduce purifying column water changing frequency, improve simultaneously because the inside and outside difference in temperature is too big winter, and then the problem of a large amount of steam of chimney discharge that produces.
Drawings
FIG. 1 is a flow chart of hydrochloric acid tail gas purification;
FIG. 2 is a flow chart of the hydrochloric acid tail gas purification process of the present invention;
FIG. 3 is a schematic structural view of the water mist cooler of the present invention;
FIG. 4 is a schematic structural view of a first gas-liquid separator according to the present invention;
FIG. 5 is a schematic structural view of a second gas-liquid separator according to the present invention;
fig. 6 is a schematic structural view of the acid mist purification tower of the present invention.
Reference numerals: cleaning tank 1, water mist cooler 2, shell 201, end enclosure 202, graphite pipe 203, baffle 204, cooling water inlet 205, cooling water outlet 206, water mist outlet 207, water mist inlet 208, pickling tank 3, acid mist cooler 4, first gas-liquid separator 5, separator shell 501, hand hole 502, multi-surface hollow ball filler 503, separator baffle 504, liquid outlet 505, demisting layer 506, tail gas inlet 507, tail gas outlet 508, acid circulation tank 6, conveying pipeline 7, fourth gas-liquid separator 8, cleaning waste liquid tank 9, acid mist purification tower 10, water storage layer 1001, absorption liquid cooling device 1002, acid mist purification tower main body 1003, primary circulation spraying layer 1004, primary filler absorption layer 1005, secondary circulation spraying layer 1006, orifice plate diffusion layer 1007, secondary filler absorption layer 1008, water replenishing spraying layer, primary demisting layer 1010, secondary demisting layer 1011, tertiary demisting layer 1012, water replenishing spraying layer 1009, The device comprises a water supplementing adjusting and filtering device 1013, a water outlet filtering device 1014, a second gas-liquid separator 11, a convection pipe 1101, an air valve 1102, an acid mist fan 12, a third gas-liquid separator 13 and a chimney 14.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1 to 6, the following technical solutions are adopted in the present embodiment: it comprises a cleaning tank 1, a water mist cooler 2, a pickling tank 3, an acid mist cooler 4, a first gas-liquid separator 5, an acid circulating tank 6, a conveying pipeline 7, a fourth gas-liquid separator 8, a cleaning waste liquid tank 9, an acid mist purification tower 10, a second gas-liquid separator 11, an acid mist fan 12, a third gas-liquid separator 13 and a chimney 14, wherein the cleaning tank 1 is connected with the water mist cooler 2, the pickling tank 3 is connected with the first gas-liquid separator 5 through the acid mist cooler 4, a liquid outlet of the first gas-liquid separator 5 is connected with the acid circulating tank 6, the water mist cooler 2 and the first gas-liquid separator 5 are connected with the fourth gas-liquid separator 8 through the conveying pipeline 7, a liquid outlet of the fourth gas-liquid separator 8 is connected with the cleaning waste liquid tank 9, a gas outlet of the fourth gas-liquid separator 8 is connected with the acid mist purification tower 10, the acid mist purification tower 10 is connected with the acid mist, the acid mist fan 12 is connected with the chimney 14 through the third gas-liquid separator 13, and the liquid outlets of the second gas-liquid separator 11 and the third gas-liquid separator 13 are connected with the acid mist purification tower 10.
The water mist cooler 2 is a floating tube type graphite heat exchanger, so as to adapt to the working condition of large temperature difference and ensure the heat exchange effect and the equipment stability, the water mist cooler 2 comprises a shell 201, end enclosures 202, graphite tubes 203, baffle plates 204, a cooling water inlet 205, a cooling water outlet 206, a water mist outlet 207 and a water mist inlet 208, a plurality of graphite tubes 203 and a plurality of baffle plates 204 are arranged in the shell 201, the graphite tubes 203 are distributed along the axial direction of the shell 201, the baffle plates 204 are distributed along the longitudinal direction of the shell 201 in a staggered way, the shell 201 is provided with the cooling water inlet 205 and the cooling water outlet 206, the end enclosures 202 are arranged on two sides of the shell 201, the water mist outlet 207 and the water mist inlet 208 are respectively arranged on the end enclosures 202 on the two sides, a water mist cooler 2 is additionally arranged on the water mist conveying pipeline of the washing tank 1, the high, most of the water mist is condensed into small liquid drops, so that the water mist is better utilized to absorb HCL in the subsequent process, the purification effect is further improved, the temperature rise speed of the acid mist purification tower is reduced, and the water change frequency of the purification tower is reduced, so that the purposes of reducing water consumption and water treatment capacity are achieved.
The first gas-liquid separator 5, the fourth gas-liquid separator 8, the second gas-liquid separator 11 and the third gas-liquid separator 13 have the same internal structure, the first gas-liquid separator 5 comprises a separator shell 501, a hand hole 502, a polyhedral hollow ball filler 503, a separator baffle plate 504, a liquid outlet 505, a demisting layer 506, a tail gas inlet 507 and a tail gas outlet 508, the hand hole 502 is arranged outside the separator shell 501, the polyhedral hollow ball filler 503 is filled inside the separator shell 501, a plurality of separator baffle plates 504 are longitudinally distributed inside the separator shell 501 in a staggered manner, the tail gas inlet 507 and the tail gas inlet 508 are respectively arranged on the left side and the right side of the separator shell 501, the demisting layer 506 is arranged at the inlet of the tail gas inlet 507, the fourth gas-liquid separator 8 is additionally arranged in front of the acid mist purification tower 10, so that water mist cooled and condensed by a water mist cooler is mixed and absorbed with residual tail gas in the delivery pipeline, and enters the fourth gas-liquid separator 8 to further absorb and purify the HCL gas and separate gas and liquid so as to realize the purposes of secondary utilization of water vapor in the cleaning tank 1, further reducing the entering amount of the HCL gas in the acid mist purification tower 10, improving the overall purification effect and reducing the water changing frequency of the purification tower so as to reduce the water consumption and the water treatment capacity. The separated and collected dilute acid liquid flows into a cleaning waste liquid tank 9 for regeneration; the inside baffling formula structure that adopts of vapour and liquid separator uses the multiaspect clean shot to fill, and the afterbody is equipped with the defogging device to improve mist's stroke, fully improve area of contact, and furthest's realization gas-liquid separation effect.
The acid mist purification tower 10 comprises a water storage layer 1001, an absorption liquid cooling device 1002, an acid mist purification tower body 1003, a primary circulating spray layer 1004, a primary filler absorption layer 1005, a secondary circulating spray layer 1006, a pore plate diffusion layer 1007, a secondary filler absorption layer 1008, a water replenishing spray layer 1009, a primary demisting layer 1010, a secondary demisting layer 1011, a tertiary demisting layer 1012, a water replenishing adjusting filter 1013 and a water outlet filter 1014, wherein the water storage layer 1001 is arranged at the lower part of the acid mist purification tower body 1003, the absorption liquid cooling device 1002 is arranged in the water storage layer, the primary filler absorption layer 1005 and the secondary filler absorption layer 1008 are arranged in the middle of the acid mist purification tower body 1003, the primary circulating spray layer 1004 is positioned below the primary filler absorption layer 1005, the secondary circulating spray layer 1006 is positioned below the secondary filler absorption layer 1008, and the pore plate diffusion layer 1007 is arranged between the secondary circulating spray layer 1006 and the secondary filler absorption layer 1008, the second grade is packed the absorbed layer 1008 top and is provided with the moisturizing and sprays layer 1009, and the moisturizing sprays the layer 1009 top and be provided with one-level defogging layer 1010, and acid mist purification tower main part 1003 top is provided with second grade defogging layer 1011 and tertiary defogging layer 1012, and the moisturizing mouth department of acid mist purification tower main part 1003 is provided with the moisturizing and adjusts filter equipment 1013, and the delivery port department of acid mist purification tower main part 1003 is provided with delivery port filter equipment 1014.
A set of absorption liquid cooling device 1002 is arranged on a water storage layer 1001 at the bottom of the acid mist purification tower 10, circulating cooling water is used for cooling absorption liquid, secondary acid gas pollution caused by temperature rise of the purification tower is prevented, and a floating tube type graphite heat exchanger is adopted for the absorption liquid cooling device 1002 to ensure heat exchange effect and equipment stability; a non-blocking design is adopted, and a water outlet at the bottom of the acid mist purification tower 10 and a water replenishing port are respectively provided with a filtering device, so that a nozzle is ensured to be free of blocking; the tail gas is absorbed and purified by adopting a multi-stage full-coverage spraying mode, so that no dead angle is ensured for atomization spraying; the purification treatment of HCL is realized more scientifically and more in a mode of combining various fillers and structures, and meanwhile, the key parts adopt visual structures, so that the spraying condition, the circulating water level and the filler condition in the tower can be directly observed, and the water supplement amount can be controlled by adjusting the water inlet pressure; the top of the acid mist purification tower 10 adopts a three-stage combined mist removal mode, the amount of water mist output is reduced, and the third-stage mist removal layer adopts a whole pulling and inserting type structure, so that the acid mist purification tower is convenient to detach, wash and install.
The air pipe 1101 is arranged above the second gas-liquid separator 11, the air valve 1102 is installed on the air pipe 1101, the internal pressure of the device can be controlled by adjusting the opening and closing amount of the valve, cold and heat exchange with tail gas in the device is realized by introducing external cold air into the device, gas-liquid separation is carried out, and the effect of further removing water vapor in the tail gas is achieved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides an energy-saving hydrochloric acid tail gas cleanup unit that multistage cooling separation was retrieved which characterized in that: it comprises a cleaning tank (1), a water mist cooler (2), a pickling tank (3), an acid mist cooler (4), a first gas-liquid separator (5), an acid circulating tank (6), a conveying pipeline (7), a fourth gas-liquid separator (8), a cleaning waste liquid tank (9), an acid mist purification tower (10), a second gas-liquid separator (11), an acid mist fan (12), a third gas-liquid separator (13) and a chimney (14), wherein the cleaning tank (1) is connected with the water mist cooler (2), the pickling tank (3) is connected with the first gas-liquid separator (5) through the acid mist cooler (4), a liquid outlet of the first gas-liquid separator (5) is connected with the acid circulating tank (6), the water mist cooler (2) and the first gas-liquid separator (5) are connected with the fourth gas-liquid separator (8) through the conveying pipeline (7), and a liquid outlet of the fourth gas-liquid separator (8) is connected with the cleaning waste liquid tank (9), the gas outlet of the fourth gas-liquid separator (8) is connected with an acid mist purification tower (10), the acid mist purification tower (10) is connected with an acid mist fan (12) through a second gas-liquid separator (11), and the acid mist fan (12) is connected with a chimney (14) through a third gas-liquid separator (13).
2. The energy-saving hydrochloric acid tail gas purification device for multistage cooling separation recovery according to claim 1, characterized in that: the water mist cooler (2) is a floating tube type graphite heat exchanger, the water mist cooler (2) comprises a shell (201), an end enclosure (202), graphite pipes (203), baffle plates (204), a cooling water inlet (205), a cooling water outlet (206), a water mist outlet (207) and a water mist inlet (208), the shell (201) is internally provided with a plurality of graphite pipes (203) and a plurality of baffle plates (204), the graphite pipes (203) are axially distributed along the shell (201), the baffle plates (204) are longitudinally distributed along the shell (201) in a staggered manner, the shell (201) is provided with the cooling water inlet (205) and the cooling water outlet (206), the two sides of the shell (201) are provided with the end enclosure (202), and the end enclosures (202) on the two sides are respectively provided with the water mist outlet (207) and the water mist inlet (208).
3. The energy-saving hydrochloric acid tail gas purification device for multistage cooling separation recovery according to claim 1, characterized in that: the first gas-liquid separator (5), the fourth gas-liquid separator (8), the second gas-liquid separator (11) and the third gas-liquid separator (13) have the same internal structure, the first gas-liquid separator (5) comprises a separator shell (501), a hand hole (502), multi-surface hollow sphere packing (503), a separator baffle plate (504), a liquid discharge port (505), a demisting layer (506), a tail gas inlet (507) and a tail gas outlet (508), a hand hole (502) is arranged outside the separator shell (501), a polyhedral hollow ball filler (503) is filled inside the separator shell (501), a plurality of separator baffle plates (504) are longitudinally and alternately distributed in the separator shell (501), the left side and the right side of the separator shell (501) are respectively provided with a tail gas inlet (507) and a tail gas outlet (508), and the inlet of the tail gas inlet (507) is provided with a defogging layer (506).
4. The energy-saving hydrochloric acid tail gas purification device for multistage cooling separation recovery according to claim 1, characterized in that: the acid mist purification tower (10) comprises a water storage layer (1001), an absorption liquid cooling device (1002), an acid mist purification tower main body (1003), a primary circulating spraying layer (1004), a primary filler absorption layer (1005), a secondary circulating spraying layer (1006), a pore plate diffusion layer (1007), a secondary filler absorption layer (1008), a water replenishing spraying layer (1009), a primary defogging layer (1010), a secondary defogging layer (1011), a tertiary defogging layer (1012), a water replenishing adjusting and filtering device (1013) and a water outlet filtering device (1014), wherein the water storage layer (1001) is arranged at the lower part of the acid mist purification tower main body (1003), the absorption liquid cooling device (1002) is arranged in the water storage layer (1001), the primary filler absorption layer (1005) and the secondary filler absorption layer (1008) are arranged at the middle part of the acid mist purification tower main body (1003), and the primary circulating spraying layer (1004) is positioned below the primary filler absorption layer (1005), the second grade circulation sprays the layer (1006) and is located second grade and packs absorbed layer (1008) below, and the second grade circulation sprays and is provided with orifice plate diffusion layer (1007) between layer (1006) and second grade filler absorbed layer (1008), second grade filler absorbed layer (1008) top is provided with the moisturizing and sprays layer (1009), and the moisturizing sprays layer (1009) top and is provided with one-level defogging layer (1010), acid mist purification tower main part (1003) top is provided with second grade defogging layer (1011) and tertiary defogging layer (1012), the moisturizing mouth department of acid mist purification tower main part (1003) is provided with moisturizing regulation filter equipment (1013), the delivery port department of acid mist purification tower main part (1003) is provided with delivery port filter equipment (1014).
5. The energy-saving hydrochloric acid tail gas purification device for multistage cooling separation recovery according to claim 1, characterized in that: an air-to-air pipe (1101) is arranged above the second gas-liquid separator (11), and an air valve (1102) is installed on the air-to-air pipe (1101).
6. The energy-saving hydrochloric acid tail gas purification device for multistage cooling separation recovery according to claim 1, characterized in that: the liquid outlets of the second gas-liquid separator (11) and the third gas-liquid separator (13) are connected with the acid mist purification tower (10).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921108097.2U CN211328762U (en) | 2019-07-16 | 2019-07-16 | Energy-saving hydrochloric acid tail gas purification device that multistage cooling separation was retrieved |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921108097.2U CN211328762U (en) | 2019-07-16 | 2019-07-16 | Energy-saving hydrochloric acid tail gas purification device that multistage cooling separation was retrieved |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112458478A (en) * | 2020-10-23 | 2021-03-09 | 宝钢集团南通线材制品有限公司 | Galvanized steel wire pickling tank and pickling production line |
| CN112717648A (en) * | 2020-12-11 | 2021-04-30 | 深圳金基珠宝首饰有限公司 | Acid boiling and tail gas absorption equipment |
-
2019
- 2019-07-16 CN CN201921108097.2U patent/CN211328762U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112458478A (en) * | 2020-10-23 | 2021-03-09 | 宝钢集团南通线材制品有限公司 | Galvanized steel wire pickling tank and pickling production line |
| CN112717648A (en) * | 2020-12-11 | 2021-04-30 | 深圳金基珠宝首饰有限公司 | Acid boiling and tail gas absorption equipment |
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