CN216223653U

CN216223653U - Concentrated tail gas absorbing device of spent acid

Info

Publication number: CN216223653U
Application number: CN202122888354.2U
Authority: CN
Inventors: 李华; 冯殿兴; 颜涛; 金健; 陈波; 李祥
Original assignee: Sennics Co ltd
Current assignee: Sennics Co ltd
Priority date: 2021-11-23
Filing date: 2021-11-23
Publication date: 2022-04-08
Anticipated expiration: 2031-11-23

Abstract

The embodiment of the application provides a concentrated tail gas absorbing device of spent acid, including the vacuum tank that is arranged in collecting tail gas among the concentrated acid system, the vacuum tank is through first connecting pipe connection dry-type screw vacuum pump inlet end, dry-type screw vacuum pump gives vent to anger the end and passes through the second connecting pipe and connect tail gas condenser inlet end, first blow-down pipe is installed at tail gas condenser top, first blow-down pipe passes through the third connecting pipe and connects the sprayer, the sprayer is installed in the tail gas absorption tank upper end that is used for storing alkali lye, tail gas absorption tank lower extreme surface has tail gas circulating pump inlet end through the pipe connection, the tail gas circulating pump gives vent to anger the end and is linked together with the sprayer through the gas-supply pipe, tail gas absorption tank upper surface mounting has the blast pipe that is connected with the second blow-down pipe. Compared with the prior art, the method has the following beneficial effects: the waste water treatment cost is reduced, the energy-saving effect is achieved, partial materials are recycled, the consumption is reduced, and the smoke is avoided.

Description

Concentrated tail gas absorbing device of spent acid

Technical Field

The application relates to a waste acid concentrated tail gas absorbing device, and belongs to the technical field of tail gas treatment.

Background

In chemical industrial production, it is generally necessary to use acids as a reaction raw material, a medium, or a catalyst, and after the reaction, a large amount of industrial waste acid is generally generated after washing with water. After the waste acid is concentrated, the waste acid concentrated tail gas is pumped out by a water ring vacuum pump, but the water ring vacuum pump generates more acidic wastewater, the recovery rate of the tail gas is low, and the tail gas pipe emits yellow smoke containing 1-3% of sulfuric acid, so that the waste acid concentrated tail gas does not meet the requirement of environmental protection.

SUMMERY OF THE UTILITY MODEL

To the not enough that prior art exists, this application aim at provides a waste acid concentration tail gas absorbing device to solve the problem that proposes in the above-mentioned background art.

In order to realize the above-mentioned purpose, the application provides a waste acid concentration tail gas absorbing device, including the vacuum tank that is arranged in collecting tail gas among the concentrated acid system, the vacuum tank passes through first connecting pipe and connects dry-type screw vacuum pump inlet end, dry-type screw vacuum pump give vent to anger the end and connect tail gas condenser inlet end through the second connecting pipe, first blow-down pipe is installed at tail gas condenser top, first blow-down pipe upper end is connected with the second blow-down pipe through the stop valve, first blow-down pipe passes through the third connecting pipe and connects the sprayer, the sprayer is installed in the tail gas absorption tank upper end that is used for storing alkali lye, tail gas absorption tank lower extreme surface has tail gas circulating pump feed liquor end through the pipe connection, tail gas circulating pump goes out the liquid end and is linked together through transfer line and sprayer, tail gas absorption tank upper surface mounting has the blast pipe that is connected with the second blow-down pipe, and a collecting piece for collecting leakage is arranged on the lower side of the tail gas circulating pump.

Further, the collecting part comprises a bottom box, the bottom box is arranged under the tail gas absorption tank, a bracket is arranged at the bottom in the bottom box, and the tail gas circulating pump is arranged on the upper surface of the bracket.

Further, the bottom of the tail gas absorption tank is fixedly connected with a supporting plate, four support rods are uniformly arranged on the lower surface of the supporting plate, and the lower ends of the support rods are fixed at the bottom of the bottom box.

Further, upper portion position is equipped with vertical arrangement's uide bushing in the end box, uide bushing surface fixedly connected with L type pole, the L type pole other end and end box fixed connection, slidable mounting has vertical arrangement's ejector pin in the uide bushing, the kicking block is installed to the ejector pin lower extreme, the ejector pin upside is equipped with travel switch, travel switch installs at tail gas absorption tank surface, travel switch passes through wire and air pump electric connection, the air pump is installed at the liquid storage pot surface, the air pump is given vent to anger the end and is installed the gas-supply pipe, the one end that the air pump was kept away from to the gas-supply pipe extends to siphon pipe orifice department, the siphon upper end is installed at liquid storage pot upper end surface and is extended to in the liquid storage pot, the siphon lower extreme extends to end box bottom in.

Furthermore, a support plate is fixedly connected to the outer surface of the tail gas absorption tank, the travel switch is installed on the lower surface of the support plate, a support plate is installed on the outer surface of the upper end of the liquid storage tank, and the air pump is installed on the upper surface of the support plate.

Further, a wide-mouth tube is installed at one end of the siphon in the liquid storage tank, the wide-mouth tube is located under the gas conveying pipe, and the diameter of the wide-mouth tube is larger than that of the siphon.

Further, the upper end of the ejector rod is fixedly connected with a disc head, the disc head is arranged right below the travel switch, and the disc head and the ejector rod are of an integrally formed structure.

Furthermore, a blind hole is formed in the position, where the ejector rod is installed on the upper surface of the floating block, and the lower end of the ejector rod is fixed in the blind hole.

Further, the outer surface mounting of tail gas absorption jar upper end has annotates the liquid pipe, the one end of annotating the liquid pipe and keeping away from the tail gas absorption jar is installed and is used for connecting the ball valve of alkali liquor pipeline, tail gas absorption jar lower extreme outer surface mounting has the blowoff valve.

Further, a liquid discharge valve is installed at the lower end of the tail gas condenser and is connected with a recovery tank for collecting condensed recovery liquid through a pipeline.

The beneficial effect of this application:

1. the utility model provides a concentrated tail gas absorbing device of spent acid adopts dry-type screw vacuum pump, stops waste water and produces, reduces the waste water treatment expense, compares with water ring vacuum pump, and dry-type screw vacuum pump's motor power is lower, has energy-conserving effect, and vacuum pump exhaust installation tail gas condenser can condense recovery part waste gas, and recovery part material reduces the consumption, and remaining waste gas uses 10% ~ 20% alkali lye vacuum ejector and discharges after with, stops the glass soot smoke.

2. The application discloses concentrated tail gas absorbing device of spent acid, when the tail gas circulating pump inlet end or give vent to anger the end and appear the weeping condition because of sealed inefficacy, the alkali lye that spills drips in the end box, realizes concentrating the alkali lye of collecting the leakage, and the alkali lye of preventing leaking drips at will.

3. The utility model provides a concentrated tail gas absorbing device of spent acid, increase along with alkali lye is collected in the end box, the floating block drives the ejector pin along uide bushing rebound, after ejector pin upper end extrusion travel switch contact position, travel switch is closed, and then the circuit of switch-on air pump, work is carried the air in to the gas-supply pipe after the air pump circular telegram, the air in the gas-supply pipe flows from the one end that the siphon is in the liquid storage pot, thereby make the both ends of siphon produce the pressure differential, under the effect of pressure differential, alkali lye in the end box flows into in the liquid storage pot along the siphon, realize shifting the alkali lye in the end box, prevent that alkali lye in the end box from overflowing in the end box because of not in time clearing up.

The foregoing summary is provided for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present application will be readily apparent by reference to the drawings and following detailed description.

Drawings

In the drawings, like reference numerals refer to the same or similar parts or elements throughout the several views unless otherwise specified. The figures are not necessarily to scale. It is appreciated that these drawings depict only some embodiments in accordance with the disclosure and are therefore not to be considered limiting of its scope.

FIG. 1 is a schematic structural diagram of a waste acid concentrated tail gas absorption device according to an embodiment of the present application;

FIG. 2 is a schematic view illustrating an assembly of a top rod and a bottom box in the waste acid concentrated tail gas absorption device according to an embodiment of the present application;

FIG. 3 is a schematic view of the siphon, gas pipe and liquid storage tank in the waste acid concentrated tail gas absorption apparatus according to an embodiment of the present application;

in the figure: 1-vacuum tank, 2-first connecting pipe, 3-dry screw vacuum pump, 4-second connecting pipe, 5-tail gas condenser, 6-liquid discharge valve, 7-first vent pipe, 8-stop valve, 9-second vent pipe, 10-third connecting pipe, 11-exhaust pipe, 12-liquid injection pipe, 13-tail gas absorption tank, 14-ejector, 15-gas pipe, 16-support plate, 17-travel switch, 18-support plate, 19-blow-off valve, 20-support rod, 21-bottom box, 22-ejector rod, 23-bracket, 24-tail gas circulating pump, 25-siphon pipe, 26-gas pipe, 27-air pump, 28-support plate, 29-liquid storage tank, 30-guide sleeve, 31-floating block, 32-L-shaped rod, 33-round pan head and 34-wide mouth tube.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present application. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

Referring to fig. 1 to 3, the present application provides a waste acid concentrated tail gas absorption apparatus, which includes a vacuum tank 1 for collecting tail gas in a concentrated acid system, the vacuum tank 1 is connected to an air inlet end of a dry screw vacuum pump 3 through a first connecting pipe 2, and an air outlet end of the dry screw vacuum pump 3 is connected to an air inlet end of a tail gas condenser 5 through a second connecting pipe 4. First blow-down pipe 7 is installed at 5 tops of tail gas condenser, and 7 upper ends of first blow-down pipe are connected with second blow-down pipe 9 through stop valve 8. The first emptying pipe 7 is connected with an ejector 14 through a third connecting pipe 10, and the ejector 14 is arranged at the upper end of a tail gas absorption tank 13 for storing alkali liquor. The outer surface of the lower end of the tail gas absorption tank 13 is connected with the gas inlet end of a tail gas circulating pump 24 through a pipeline, and the gas outlet end of the tail gas circulating pump 24 is communicated with the ejector 14 through a gas conveying pipe 15. And the upper surface of the tail gas absorption tank 13 is provided with an exhaust pipe 11 connected with the second emptying pipe 9. The application discloses concentrated tail gas absorbing device of spent acid stops waste water and produces through changing water ring vacuum pump for dry-type screw vacuum pump 3, reduces the waste water treatment expense to after changing for dry-type screw vacuum pump 3, the motor power of device reduces, reaches energy-conserving effect, vacuum pump exhaust installation tail gas condenser 5, and partial waste gas is retrieved in the condensation, retrieves partial material, reduces the consumption. The residual waste gas is discharged after being neutralized by using an alkali liquor vacuum ejector 14 with the mass percent of 10-20%, so that the smoke and the smoke are eliminated. Wherein the alkali solution can be sodium hydroxide solution and/or potassium hydroxide solution.

As an embodiment of this application, tail gas circulating pump 24 downside is equipped with the end box 21 that is used for collecting the weeping, end box 21 sets up under tail gas absorption tank 13, bracket 23 is installed to the bottom in the end box 21, tail gas circulating pump 24 installs at bracket 23 upper surface, tail gas absorption tank 13 bottom fixedly connected with layer board 18, four vaulting poles 20 are evenly installed to layer board 18 lower surface, the bottom is fixed in end box 21 to the vaulting pole 20 lower extreme, vaulting pole 20 and layer board 18 play the effect of supporting tail gas circulating pump 24 jointly, when the weeping circumstances appears because of sealed the inefficacy in tail gas circulating pump 24 inlet end or outlet end, the alkali lye that spills drips in end box 21, realize concentrating and collecting the alkali lye that leaks, the alkali lye of preventing leaking drips at will.

As an embodiment of the application, a vertically arranged guide sleeve 30 is arranged at an upper position in the bottom box 21, and an L-shaped rod 32 is fixedly connected to the outer surface of the guide sleeve 30. The other end of the L-shaped rod 32 is fixedly connected with the bottom box 21, a vertically arranged ejector rod 22 is slidably mounted in the guide sleeve 30, a floating block 31 is mounted at the lower end of the ejector rod 22, and a travel switch 17 is arranged on the upper side of the ejector rod 22. A support plate 16 is fixedly connected to the outer surface of the tail gas absorption tank 13, a travel switch 17 is installed on the lower surface of the support plate 16, and the support plate 16 provides an installation carrier for the travel switch 17. The travel switch 17 is electrically connected with the air pump 27 through a conducting wire, the outer surface of the upper end of the liquid storage tank 29 is provided with a support plate 28, the air pump 27 is arranged on the upper surface of the support plate 28, the support plate 28 provides an installation carrier for the air pump 27, the air outlet end of the air pump 27 is provided with an air pipe 26, one end of the air pipe 26, which is far away from the air pump 27, extends to the pipe orifice of the siphon 25, and the upper end of the siphon 25 is arranged on the outer surface of the upper end of the liquid storage tank 29 and extends into the liquid storage tank 29. The lower end of the siphon 25 extends to the bottom of the bottom box 21, and the floating block 31 drives the top rod 22 to move upwards along the guide sleeve 30 along with the increase of the alkali liquor collected in the bottom box 21. When the upper end of the ejector rod 22 presses the contact part of the travel switch 17, the travel switch 17 is closed, and then the circuit of the air pump 27 is connected, the air pump 27 works to convey air into the air conveying pipe 26 after being electrified, the air in the air conveying pipe 26 flows out from one end of the siphon pipe 25, which is positioned at the liquid storage tank 29, so that pressure difference is generated between two ends of the siphon pipe 25, alkali liquid in the bottom box 21 flows into the liquid storage tank 29 along the siphon pipe 25 under the action of the pressure difference, the alkali liquid in the bottom box 21 is transferred, and the alkali liquid in the bottom box 21 is prevented from overflowing from the bottom box 21 due to untimely cleaning.

As an embodiment of the application, a wide-mouth tube 34 is installed at one end of the siphon pipe 25 in the liquid storage tank 29, the wide-mouth tube 34 is positioned under the air conveying pipe 26, the diameter of the wide-mouth tube 34 is larger than that of the siphon pipe 25, and the cross section of one end of the siphon pipe 25 in the liquid storage tank 29 is increased due to the design of the wide-mouth tube 34.

According to an embodiment of the application, the upper end of the ejector rod 22 is fixedly connected with the disc head 33, the disc head 33 is arranged right below the travel switch 17, the disc head 33 and the ejector rod 22 are of an integrally formed structure, the area of the contact part of the ejector rod 22 and the travel switch 17 is increased by the disc head 33, a blind hole is formed in the position, on the floating block 31, of the ejector rod 22, the lower end of the ejector rod 22 is fixed in the blind hole, and the connection stability of the ejector rod 22 and the floating block 31 is improved.

As an embodiment of this application, tail gas absorption tank 13 upper end surface mounting has notes liquid pipe 12, and the ball valve that is used for connecting alkali lye pipeline is installed to the one end of annotating liquid pipe 12 and keeping away from tail gas absorption tank 13, and exhaust valve 19 is installed to tail gas absorption tank 13 lower extreme surface, connects the ball valve on alkali lye pipeline, opens the ball valve after, and alkali lye in the alkali lye pipeline flows into tail gas absorption tank 13 in through annotating liquid pipe 12, realizes replenishing alkali lye to the tail gas absorption tank 13 in.

As an embodiment of the application, a drain valve 6 is installed at the lower end of the tail gas condenser 5, the drain valve 6 is communicated with a recovery tank for collecting condensed recovery liquid through a pipeline, and after the drain valve 6 is opened, the condensed recovery liquid in the tail gas condenser 5 flows into the recovery tank through the pipeline.

According to the specific implementation mode, the water ring vacuum pump is replaced by the dry screw vacuum pump 3, waste water is prevented from being generated, waste water treatment cost is reduced, after the water ring vacuum pump is replaced by the dry screw vacuum pump 3, the power of a motor is reduced, an energy-saving effect is achieved, the tail gas condenser 5 is installed in the exhaust of the vacuum pump, partial waste gas is condensed and recycled, partial materials are recycled, consumption is reduced, and residual waste gas is discharged after being neutralized by the 10% -20% alkali liquor vacuum ejector 14, so that the smoke is prevented.

When the liquid leakage occurs at the liquid inlet end or the liquid outlet end of the tail gas circulating pump 24 due to sealing failure, the leaked alkali liquor drops into the bottom box 21 to realize centralized collection of the leaked alkali liquor, the leaked alkali liquor drops randomly, the floating block 31 drives the ejector rod 22 to move upwards along the guide sleeve 30 along with the increase of the alkali liquor collected in the bottom box 21, when the upper end of the mandril 22 extrudes the contact part of the travel switch 17, the travel switch 17 is closed, and then the circuit of the air pump 27 is connected, the air pump 27 works to convey air into the air pipe 26 after being electrified, the air in the air pipe 26 flows out from one end of the siphon pipe 25 positioned at the liquid storage tank 29, so that the pressure difference is generated at the two ends of the siphon pipe 25, under the action of pressure difference, the alkali liquor in the bottom box 21 flows into the liquid storage tank 29 along the siphon 25, so that the alkali liquor in the bottom box 21 is transferred, and the alkali liquor in the bottom box 21 is prevented from overflowing from the bottom box 21 due to untimely cleaning.

While there have been shown and described what are at present considered the fundamental principles and essential features of the application and its advantages, it will be apparent to those skilled in the art that the application is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics of the application. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a concentrated tail gas absorbing device of spent acid, includes vacuum tank (1) that is arranged in collecting tail gas among the concentrated acid system, its characterized in that, vacuum tank (1) is through the inlet end of first connecting pipe (2) connection dry-type screw vacuum pump (3), the inlet end of tail gas condenser (5) is connected through second connecting pipe (4) to the end of giving vent to anger of dry-type screw vacuum pump (3), first blow-down pipe (7) is installed at the top of tail gas condenser (5), first blow-down pipe (7) upper end is connected with second blow-down pipe (9) through stop valve (8), first blow-down pipe (7) are through third connecting pipe (10) connection sprayer (14), sprayer (14) are installed in tail gas absorption tank (13) upper end that is used for storing alkali lye, tail gas absorption tank (13) lower extreme surface has the inlet end of tail gas circulating pump (24) through the pipe connection, the end of giving vent to anger of tail gas circulating pump (24) is linked together through gas-supply pipe (15) and sprayer (14), surface mounting has blast pipe (11) that are connected with second blow-down pipe (9) on tail gas absorption tank (13), tail gas circulating pump (24) downside is equipped with the collection piece that is used for collecting the weeping.

2. A waste acid concentrated tail gas absorption device according to claim 1, wherein the collecting member comprises a bottom box (21), the bottom box (21) is arranged right below the tail gas absorption tank (13), a bracket (23) is arranged at the bottom in the bottom box (21), and the tail gas circulating pump (24) is arranged on the upper surface of the bracket (23).

3. A waste acid concentrated tail gas absorption device according to claim 2, wherein a supporting plate (18) is fixedly connected to the bottom of the tail gas absorption tank (13), four support rods (20) are uniformly mounted on the lower surface of the supporting plate (18), and the lower ends of the support rods (20) are fixed to the bottom of a bottom box (21).

4. A waste acid concentrated tail gas absorption device as claimed in claim 2, wherein a vertically arranged guide sleeve (30) is arranged at the upper position in the bottom box (21), an L-shaped rod (32) is fixedly connected to the outer surface of the guide sleeve (30), the other end of the L-shaped rod (32) is fixedly connected with the bottom box (21), a vertically arranged ejector rod (22) is slidably mounted in the guide sleeve (30), a floating block (31) is mounted at the lower end of the ejector rod (22), a travel switch (17) is arranged on the upper side of the ejector rod (22), the travel switch (17) is mounted on the outer surface of the tail gas absorption tank (13), the travel switch (17) is electrically connected with the air pump (27) through a lead, the air pump (27) is mounted on the outer surface of the liquid storage tank (29), the air delivery pipe (26) is mounted at the air outlet end of the air pump (27), one end of the air pump (26) far away from the air pump (27) extends to the pipe orifice of the siphon (25), the upper end of the siphon (25) is arranged on the outer surface of the upper end of the liquid storage tank (29) and extends into the liquid storage tank (29), and the lower end of the siphon (25) extends to the bottom in the bottom box (21).

5. A waste acid concentrated tail gas absorption device as claimed in claim 4, wherein a support plate (16) is fixedly connected to the outer surface of the tail gas absorption tank (13), the travel switch (17) is mounted on the lower surface of the support plate (16), a support plate (28) is mounted on the outer surface of the upper end of the liquid storage tank (29), and the air pump (27) is mounted on the upper surface of the support plate (28).

6. A waste acid concentrated tail gas absorption device as claimed in claim 4, wherein a wide-mouth tube (34) is mounted at one end of the siphon (25) in the liquid storage tank (29), the wide-mouth tube (34) is positioned under the gas conveying tube (26), and the diameter of the wide-mouth tube (34) is larger than that of the siphon (25).

7. A waste acid concentrated tail gas absorption device according to claim 4, wherein a disc head (33) is fixedly connected to the upper end of the ejector rod (22), the disc head (33) is arranged right below the stroke switch (17), and the disc head (33) and the ejector rod (22) are of an integrally formed structure.

8. A waste acid concentrated tail gas absorption device as claimed in claim 4, wherein a blind hole is formed in the position of the upper surface of the floating block (31) where the ejector rod (22) is mounted, and the lower end of the ejector rod (22) is fixed in the blind hole.

9. A waste acid concentrated tail gas absorption device as claimed in claim 1, wherein a liquid injection pipe (12) is installed on the outer surface of the upper end of the tail gas absorption tank (13), a ball valve for connecting an alkali liquor conveying pipeline is installed at one end, away from the tail gas absorption tank (13), of the liquid injection pipe (12), and a blow-down valve (19) is installed on the outer surface of the lower end of the tail gas absorption tank (13).

10. A waste acid concentrated tail gas absorption device as claimed in claim 1, wherein a liquid discharge valve (6) is installed at the lower end of the tail gas condenser (5), and the liquid discharge valve (6) is communicated with a recovery tank for collecting condensed recovery liquid through pipeline connection.