CN214780873U - Desorption system of hydrogen sulfide gas in underground brine - Google Patents
Desorption system of hydrogen sulfide gas in underground brine Download PDFInfo
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- CN214780873U CN214780873U CN202120902687.3U CN202120902687U CN214780873U CN 214780873 U CN214780873 U CN 214780873U CN 202120902687 U CN202120902687 U CN 202120902687U CN 214780873 U CN214780873 U CN 214780873U
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Abstract
The utility model discloses a desorption system of hydrogen sulfide gas in underground brine, which comprises a first-stage degassing tower, a second-stage degassing tower, a first-stage absorption tower, a second-stage absorption tower, a gas-water separator and a vacuum pump, wherein brine mist spray heads are installed in the first-stage degassing tower and the second-stage degassing tower, a packing layer is arranged below the brine mist spray heads, a first-stage spray pump is arranged between the brine mist spray heads and a raw material tank body, and a second-stage spray pump is arranged between the bottom cavity of the first-stage degassing tower and the brine mist spray heads of the second-stage degassing tower; the first-stage absorption tower and the second-stage absorption tower are sequentially provided with an absorption liquid fog-shaped spray head, a packing layer and a distributor, the first-stage absorption tower distributor is connected with the top exhaust ports of the first-stage degassing tower and the second-stage degassing tower, the second-stage absorption tower distributor is connected with the top exhaust port of the first-stage absorption tower, and the gas-water separator is connected with the top exhaust port of the second-stage absorption tower. The utility model discloses desorption equipment, function under the negative pressure, can improve the desorption and the absorption effect of hydrogen sulfide greatly, and equipment takes up an area of for a short time, investment running cost is low, do not have secondary pollution to the environment.
Description
Technical Field
The utility model relates to a waste gas treatment technical field, concretely relates to desorption system of hydrogen sulfide gas in brine underground.
Background
Hydrogen sulfide is a toxic gas, and lower concentrations can cause poisoning and even death of the human body. The underground brine often contains a certain amount of hydrogen sulfide, which can cause great influence on human bodies, equipment and environment in the production and processing process. The existing methods for treating hydrogen sulfide mainly comprise a chemical precipitation method, an air blowing method and an oxidation method. The chemical precipitation method is to directly precipitate hydrogen sulfide in brine into harmless waste residues by using chemical reagents such as ferrous chloride and the like, has higher production cost and is suitable for treating brine with lower hydrogen sulfide content; the air blowing method directly blows out hydrogen sulfide in brine by using a large amount of air, partial hydrogen sulfide is oxidized into a sulfur simple substance in the blowing process, the brine with high hydrogen sulfide content is applicable, but the blowing method has high energy consumption and high requirement on an absorption device because the gas-liquid ratio is large during blowing; the oxidation method is to add chlorine, ozone or sodium hypochlorite and other oxidants into brine under alkaline condition to convert hydrogen sulfide in the brine into sulfate radical and then remove the sulfate radical, and the method has high production cost, and the oxidants are often required to be excessive, thus easily causing secondary pollution.
SUMMERY OF THE UTILITY MODEL
The utility model discloses it is high to solve current hydrogen sulfide processing method cost, equipment requirement, and the not good problem that just has secondary pollution of simultaneous treatment effect, aim at provides the desorption system of hydrogen sulfide gas body in the brine underground, operates under the negative pressure, desorption and the absorption effect of improvement hydrogen sulfide that can be great, and equipment takes up an area of for a short time, invests in lowly, running cost low, does not have secondary pollution to the environment.
The utility model discloses a following technical scheme realizes:
a system for removing hydrogen sulfide gas in underground brine comprises a primary degassing tower, a secondary degassing tower, a primary absorption tower, a secondary absorption tower and a gas-water separator, wherein the primary degassing tower and the primary absorption tower are sequentially connected with a raw material tank body; two-layer absorption liquid fog form shower nozzle is all installed on upper portion in one-level absorption tower and the second grade absorption tower, absorption liquid fog form shower nozzle below is provided with the packing layer, the packing layer below is provided with the distributor, the gas vent at one-level absorption tower distributor and one-level degasser and second grade degasser top passes through the pipe connection, the gas vent at second grade absorption tower distributor and one-level absorption tower top is connected, deareator links to each other with the gas vent at second grade absorption tower top, be provided with the vacuum pump behind the deareator, one-level absorption tower and second grade absorption tower all are equipped with the spray pump, link to each other with corresponding absorption liquid fog shower nozzle respectively.
The bottom of the first-stage absorption tower is connected with the absorption liquid fog-shaped spray head of the first-stage absorption tower through a first-stage absorption pump, and the bottom of the second-stage absorption tower is connected with the absorption liquid fog-shaped spray head of the second-stage absorption tower through a second-stage absorption pump.
The packing layer is made of polypropylene multi-surface hollow spheres.
The absorption tower is characterized by further comprising an absorption tower mother liquid tank, caustic soda solution with the concentration of 5-50% is added into the absorption tower mother liquid tank, and the absorption tower mother liquid tank is connected with the absorption liquid fog-shaped spray head through a circulating pump.
The working flow of the hydrogen sulfide gas removing equipment mainly comprises the following steps:
firstly, adding hydrochloric acid into the original halogen in the raw material tank to adjust the pH value to 3-7 (preferably 5-6); then starting a vacuum pump, and pre-pumping the primary degassing tower and the secondary degassing tower to negative pressure of-0.1-0 MPa, preferably-0.04 MPa;
adding caustic soda solution with concentration of 5-50% as absorption liquid into mother liquid tanks of the first-stage absorption tower and the second-stage absorption tower, preferably with concentration of 12-14%, starting a circulating pump, pumping the caustic soda solution into the absorption towers from the top, and atomizing by using spray heads;
starting a vacuum pump, starting a primary spray pump to pump the raw brine into a primary degassing tower, atomizing the raw brine by a top nozzle, dispersing the raw brine to a packing layer, allowing the raw brine to fall to the bottom of the degassing tower after passing through the packing layer, automatically flowing to a primary raw brine tank after reaching a certain liquid level, and performing secondary degassing, wherein the content of hydrogen sulfide in the primary degassed brine is lower than 50mg/l by adjusting the spray flow and the atomization effect, and hydrogen sulfide gas enters a primary absorption tower through a top exhaust port;
pumping primary degassed brine in the primary crude brine tank into a secondary degassing tower through a secondary spray pump, atomizing the primary degassed brine by a top nozzle, dispersing the atomized brine to a packing layer, allowing the atomized brine to fall to the bottom of the degassing tower after passing through the packing layer, allowing the atomized brine to automatically flow to the secondary crude brine tank after reaching a certain liquid level for use in a subsequent process, and allowing hydrogen sulfide content in the secondary degassed brine to be lower than 20mg/l by adjusting flow and atomization effect, wherein hydrogen sulfide gas enters a primary absorption tower through a top exhaust port;
hydrogen sulfide gas from the degassing tower enters the primary absorption tower from the bottom and is absorbed by the primary absorption liquid falling from the top in a countercurrent mode, the absorption rate of the hydrogen sulfide can reach more than 95% by adjusting the flow and the atomization effect, then tail gas is discharged from the top and enters the secondary absorption tower, the primary absorption liquid can be recycled, and when the pH value of the absorption liquid is less than 8 and the concentration of sodium sulfide is more than 12%, the absorption liquid is sent into a sodium sulfide evaporation system.
The hydrogen sulfide gas from the first-stage air suction tower enters the second-stage absorption tower from the bottom and is absorbed by the second-stage absorption liquid falling from the top in a countercurrent mode, the absorption rate of the hydrogen sulfide can reach more than 95% by adjusting the flow and the atomization effect, then the tail gas is discharged from the top and enters the gas-liquid separator and the vacuum pump to be evacuated, the second-stage absorption liquid can be recycled or used for supplementing the first-stage absorption liquid, and when the second-stage absorption liquid is used for replacing the first-stage absorption liquid, the second-stage absorption liquid is supplemented by caustic soda solution.
Wherein, the absorbed primary absorption liquid can enter a sodium sulfide evaporation system to be prepared into an alkali sulfide product.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
1. the utility model relates to a desorption system of hydrogen sulfide gas in underground brine, which operates under negative pressure, can greatly improve the desorption and absorption effects of hydrogen sulfide, and has the advantages of small equipment occupation area, low investment, low operation cost and no secondary pollution to the environment;
2. the utility model relates to a desorption system of hydrogen sulfide gas in underground brine, the high concentration hydrogen sulfide of desorption adopt alkali lye to absorb, then make the alkali sulfide product with the absorption liquid, have realized hydrogen sulfide waste gas recycle in the brine, have reduced the cost of treating pollution of enterprise.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic flow chart of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
Examples
As shown in fig. 1 and 2, a system for removing hydrogen sulfide gas from underground brine comprises a first-stage degassing tower, a second-stage degassing tower, a first-stage absorption tower, a second-stage absorption tower and a gas-water separator which are sequentially connected with a raw material tank, wherein two layers of brine mist spray heads are respectively arranged at the upper parts in the first-stage degassing tower and the second-stage degassing tower; two-layer absorption liquid fog form shower nozzle is all installed on upper portion in one-level absorption tower and the second grade absorption tower, absorption liquid fog form shower nozzle below is provided with the packing layer, the packing layer below is provided with the distributor, the gas vent at one-level absorption tower distributor and one-level degasser and second grade degasser top passes through the pipe connection, the gas vent at second grade absorption tower distributor and one-level absorption tower top is connected, deareator links to each other with the gas vent at second grade absorption tower top, be provided with the vacuum pump behind the deareator, one-level absorption tower and second grade absorption tower all are equipped with the spray pump, link to each other with corresponding absorption liquid fog shower nozzle respectively.
Preferably, the bottom of the first-stage absorption tower is connected with the absorption liquid fog-shaped spray head of the first-stage absorption tower through a first-stage absorption pump, and the bottom of the second-stage absorption tower is connected with the absorption liquid fog-shaped spray head of the second-stage absorption tower through a second-stage absorption pump.
Preferably, the packing layer is a polypropylene polyhedral hollow sphere.
Preferably, the device also comprises an absorption tower mother liquid tank, caustic soda solution with the concentration of 5-50% is added into the absorption tower mother liquid tank, and the absorption tower mother liquid tank is connected with the absorption liquid fog-shaped spray head through a circulating pump.
The working flow of the hydrogen sulfide gas removing equipment mainly comprises the following steps:
firstly, adding hydrochloric acid into the raw material tank to adjust the pH value to 3-7 (preferably 5-6), and carrying out steam heat exchange to 10-50 ℃; then starting a vacuum pump, and pre-pumping the primary degassing tower and the secondary degassing tower to negative pressure of-0.1-0 MPa, preferably-0.04 MPa;
adding caustic soda solution with concentration of 5-50% as absorption liquid into mother liquid tanks of the first-stage absorption tower and the second-stage absorption tower, preferably with concentration of 12-14%, starting a circulating pump, pumping the caustic soda solution into the absorption towers from the top, and atomizing by using spray heads;
starting a vacuum pump, starting a primary spray pump to pump the raw brine into a primary degassing tower, atomizing the raw brine by a top nozzle, dispersing the raw brine to a packing layer, allowing the raw brine to fall to the bottom of the degassing tower after passing through the packing layer, automatically flowing to a primary raw brine tank after reaching a certain liquid level, and performing secondary degassing, wherein the content of hydrogen sulfide in the primary degassed brine is lower than 50mg/l by adjusting the spray flow and the atomization effect, and hydrogen sulfide gas enters a primary absorption tower through a top exhaust port;
pumping primary degassed brine in the primary crude brine tank into a secondary degassing tower through a secondary spray pump, atomizing the primary degassed brine by a top nozzle, dispersing the atomized brine to a packing layer, allowing the atomized brine to fall to the bottom of the degassing tower after passing through the packing layer, allowing the atomized brine to automatically flow to the secondary crude brine tank after reaching a certain liquid level for use in a subsequent process, and allowing hydrogen sulfide content in the secondary degassed brine to be lower than 20mg/l by adjusting flow and atomization effect, wherein hydrogen sulfide gas enters a primary absorption tower through a top exhaust port;
hydrogen sulfide gas from the degassing tower enters the primary absorption tower from the bottom and is absorbed by the primary absorption liquid falling from the top in a countercurrent mode, the absorption rate of the hydrogen sulfide can reach more than 95% by adjusting the flow and the atomization effect, then tail gas is discharged from the top and enters the secondary absorption tower, the primary absorption liquid can be recycled, and when the pH value of the absorption liquid is less than 8 and the concentration of sodium sulfide is more than 12%, the absorption liquid is sent into a sodium sulfide evaporation system.
The hydrogen sulfide gas from the first-stage air suction tower enters the second-stage absorption tower from the bottom and is absorbed by the second-stage absorption liquid falling from the top in a countercurrent mode, the absorption rate of the hydrogen sulfide can reach more than 95% by adjusting the flow and the atomization effect, then the tail gas is discharged from the top and enters the gas-liquid separator and the vacuum pump to be evacuated, the second-stage absorption liquid can be recycled or used for supplementing the first-stage absorption liquid, and when the second-stage absorption liquid is used for replacing the first-stage absorption liquid, the second-stage absorption liquid is supplemented by caustic soda solution.
Wherein, the absorbed primary absorption liquid can enter a sodium sulfide evaporation system to be prepared into an alkali sulfide product.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (4)
1. A system for removing hydrogen sulfide gas in underground brine is characterized by comprising a primary degassing tower, a secondary degassing tower, a primary absorption tower, a secondary absorption tower and a gas-water separator, wherein the primary degassing tower, the secondary degassing tower and the gas-water separator are sequentially connected with a raw material tank body; two-layer absorption liquid fog form shower nozzle is all installed on upper portion in one-level absorption tower and the second grade absorption tower, absorption liquid fog form shower nozzle below is provided with the packing layer, the packing layer below is provided with the distributor, the gas vent at one-level absorption tower distributor and one-level degasser and second grade degasser top passes through the pipe connection, the gas vent at second grade absorption tower distributor and one-level absorption tower top is connected, deareator links to each other with the gas vent at second grade absorption tower top, be provided with the vacuum pump behind the deareator, one-level absorption tower and second grade absorption tower all are equipped with the spray pump, link to each other with corresponding absorption liquid fog shower nozzle respectively.
2. The system for removing hydrogen sulfide gas from underground brine according to claim 1, wherein the bottom of the primary absorption tower is connected with the absorption liquid mist spray head of the primary absorption tower through a primary absorption pump, and the bottom of the secondary absorption tower is connected with the absorption liquid mist spray head of the secondary absorption tower through a secondary absorption pump.
3. The system for removing hydrogen sulfide gas from underground brine according to claim 1, wherein the filler layer is a polypropylene multi-faceted hollow sphere.
4. The system for removing hydrogen sulfide gas from underground brine according to claim 1, further comprising a mother liquor tank of the absorption tower, wherein a caustic soda solution with a concentration of 5-50% is added into the mother liquor tank of the absorption tower, and the mother liquor tank of the absorption tower is connected with the mist-like spray head of the absorption liquid through a circulating pump.
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| CN202120902687.3U CN214780873U (en) | 2021-04-28 | 2021-04-28 | Desorption system of hydrogen sulfide gas in underground brine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114307591A (en) * | 2021-12-30 | 2022-04-12 | 南京科盛环保技术有限公司 | Process and device for deep denitrification of petrochemical wastewater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114307591A (en) * | 2021-12-30 | 2022-04-12 | 南京科盛环保技术有限公司 | Process and device for deep denitrification of petrochemical wastewater |
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