CN209237691U - Tail gas and subsequent acidic water treatment facilities when a kind of damage - Google Patents
Tail gas and subsequent acidic water treatment facilities when a kind of damage Download PDFInfo
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- CN209237691U CN209237691U CN201821978435.3U CN201821978435U CN209237691U CN 209237691 U CN209237691 U CN 209237691U CN 201821978435 U CN201821978435 U CN 201821978435U CN 209237691 U CN209237691 U CN 209237691U
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- inlet pipe
- stripper
- water
- alkali cleaning
- tail gas
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Abstract
Tail gas and subsequent acidic water treatment facilities when a kind of damage of the utility model, including alkali cleaning/stripper, fluid cushion tank, NaOH solution circulating pump, lye heat exchanger, purified water delivery pump, purification water- to-water heat exchanger and liquid alkaline mixer, the utility model is after original Crouse's recovery process hydrogenation plant and this technological process device is accessed in hydrogenation reduction process quenching apparatus front end.The technique of the utility model patent is very simple, easy to use, while tail gas treatment process when by damage mentions in conjunction with rational technology with subsequent acidic steam, greatly reduces coming into operation for equipment cost, ensure that the high efficiency smooth of technique.
Description
Technical field
The utility model relates to the tail gas and subsequent acidic water treatment facilities when a kind of damage.
Background technique
Currently, large petrochemical plant in terms of handling sulfur-containing tail gas, generallys use mature claus process+hydrogenating reduction
(amine absorption-regeneration) technique disposes tail gas recycle, it is ensured that final discharge is up to state standards.Although hydrogenating reduction (amine liquid
Absorption-regeneration) it is stable under technique nominal situation and national related environmental requirement can be reached, but Crouse+hydrogenating reduction (amine
Liquid absorption-regeneration) in the driving and parking stage since tolerance is smaller and tolerance fluctuation is larger, combustion furnace air distribution is difficult to effectively control technique
The problems such as making, be easy to causeing air distribution too large or too small, easily there is the stifled problem of sulphur in follow-up equipment chilling tower, so that flue gas SO2
Short time discharge is exceeded, is more than national requirements for environmental protection.Acid water treatment technology generallys use oxidizing tower process at present, need to add
Enter liquid alkaline and air oxidation, processing cost is higher, and treated when liquid alkaline abundance, and technique water conductivity is higher, is unfavorable for recycling again
Utilize, when liquid alkaline filling is insufficient, is easy to appear the case where sulphur is precipitated, equipment is caused to block, especially damage when generate
Acid water contain H2The fluctuation of S amount is larger, is less useful for the processing of current technique, influences normally to keep the safety in production.
Summary of the invention
To solve the above technical deficiency, tail gas and subsequent acid when the utility model provides a kind of damage
Property water treatment facilities, greatly reduces coming into operation for equipment cost, ensure that the high efficiency smooth of technique.
The utility model is realized by following measures:
Tail gas and subsequent acidic water treatment facilities when a kind of damage of the utility model, including alkali cleaning/stripping
Tower, fluid cushion tank, NaOH solution circulating pump, lye heat exchanger, purified water delivery pump, purification water- to-water heat exchanger and liquid alkaline mixer, institute
Three layers of spray equipment above and below being provided in alkali cleaning/stripper are stated, upper layer spray equipment is circumscribed with desalted water inlet pipe, middle layer and lower layer
Spray equipment fluid cushion pot bottom is connected by inlet pipe, the NaOH solution circulating pump and lye heat exchanger are arranged in feed liquor
On pipeline, the alkali cleaning/stripper top is connected with tail gas comb, is connected in the middle part of alkali cleaning/stripper and sprays dress positioned at lower layer
Set lower section plus hydrogen tail gas inlet pipe, alkali cleaning/stripper bottom be connected with low-pressure steam inlet pipe, alkali cleaning/stripper bottom and alkali cleaning/
Circulation line is connected between in the middle part of stripper, the purified water delivery pump and purification water- to-water heat exchanger are arranged on circulation line,
Acid water inlet pipe is connected on the circulation line, circulation line is connected with fluid cushion tank top by inlet tube, liquid
Surge tank lower part connects liquid alkaline mixer by inlet tube, and the liquid alkaline mixer is connected with liquid alkaline inlet pipe and desalted water inlet pipe,
It is connected in the middle part of fluid cushion tank top and alkali cleaning/stripper by return line, it is the desalted water inlet pipe, inlet pipe, low
Pressure steam inlet tube, circulation line are provided with valve on inlet tube.
The beneficial effects of the utility model are: the technique of the utility model patent is very simple, it is easy to use, while will be non-
Tail gas treatment process when nominal situation mentions in conjunction with rational technology with subsequent acidic steam, greatly reduces the throwing of equipment cost
With, and when effectively reducing driving and parking damage because of the problems such as air distribution caused by the exceeded situation of short-term exhaust emissions, together
When the recycling and reusing of process water that generates of system provide a possibility that unlimited, industrial water consumption is greatly saved, guarantees
The high efficiency smooth of technique.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Wherein: 1 alkali cleaning/stripper, 2 fluid cushion tanks, 3 NaOH solution circulating pumps, 4 lye heat exchangers, 5 purified water delivery pumps, 6
Purify water- to-water heat exchanger, 7 liquid alkaline mixers, 8 tail gas combs, 9 desalted water inlet pipes, 10 plus hydrogen tail gas inlet pipe, 11 low-pressure steam inlet pipes,
12 inlet pipes, 13 circulation lines, 14 acid water inlet pipes.
Specific embodiment
Further detailed description is done to the utility model with reference to the accompanying drawing:
As shown in Figure 1, tail gas and subsequent acidic water treatment facilities when a kind of damage of the utility model, including
Alkali cleaning/stripper 1, fluid cushion tank 2, NaOH solution circulating pump 3, lye heat exchanger 4, purified water delivery pump 5, purification water- to-water heat exchanger 6
With liquid alkaline mixer 7, it is provided with three layers of spray equipment, upper layer spray equipment up and down in the alkali cleaning/stripper 1 and is circumscribed with desalination
The spray equipment of water inlet pipe 9, middle layer and lower layer connects 2 bottom of fluid cushion tank, the NaOH solution circulating pump 3 by inlet pipe 12
It is arranged in inlet pipe 12 with lye heat exchanger 4, tail gas comb 8, alkali cleaning/stripping is connected at the top of the alkali cleaning/stripper 1
Below lower layer's spray equipment plus hydrogen tail gas inlet pipe 10 is connected in the middle part of tower 1,1 bottom of alkali cleaning/stripper is connected with low pressure
Steam inlet tube 11,1 bottom of alkali cleaning/stripper and alkali cleaning/stripper are connected with circulation line 13, the purified water between 1 middle part
Delivery pump 5 and purification water- to-water heat exchanger 6 are arranged on circulation line 13, are connected with acid water inlet pipe 14 on the circulation line 13,
Circulation line 13 is connected with 2 top of fluid cushion tank by inlet tube, and 2 lower part of fluid cushion tank connects liquid alkaline by inlet tube
Mixer 7, the liquid alkaline mixer 7 are connected with liquid alkaline inlet pipe and desalted water inlet pipe 9,2 top of fluid cushion tank and alkali cleaning/stripping
Be connected in the middle part of tower 1 by return line, desalted water inlet pipe 9, inlet pipe 12, low-pressure steam inlet pipe 11, circulation line 13, into
Valve is provided in liquid pipe.
The following steps are included:
Step 1, in system driving and parking damage, first by liquid alkaline mixer 7 by the liquid alkaline of 32% concentration with
Desalted water is configured to 5%~10% solution, is stored in fluid cushion tank 2, is delivered in lye/stripper through liquid alkaline circulating pump
Spray equipment；
Step 2, tail gas to be processed enters middle part in lye/stripper, and then tail gas to be processed and spray equipment spray
The lye drenched comes into full contact with reaction, and the sulphur-containing substance in tail gas is completely converted into saline solution, which enters
In fluid cushion tank 2, then the solution in fluid cushion tank 2, which continues cycling through, is delivered to spray equipment, until the solution is saturated；?
In step 1 and step 2, exchanged heat by lye heat exchanger 4, control alkali cleaning/stripper 1 in absorption temperature 80 DEG C with
Interior, 1 inner top pressure of alkali cleaning/stripper is controlled in 10-30Kpa.
Step 3, after the normal smooth discharge of system is up to standard, the circular response in step 2 is out of service, and by subsequent generation
Stripping disposition is carried out in acid wastewater transportation to alkali cleaning/stripper 1.In step 3, by subsequent acid wastewater transportation to alkali cleaning/vapour
In stripper 1, it then is passed through low-pressure steam into alkali cleaning/stripper 1, is heated and is stirred, acid water passes through circulation line 13
Circular treatment is carried out in alkali cleaning/stripper 1, until the H in acid water2S content is minimum.In step 3, by subsequent acidic water
Temperature is improved to 110 DEG C.
1) sorting: tail gas when choosing damage after the hydrogenated reaction of Crouse's recovery technology of sulfur Process Gas, 5%
~10% sodium hydroxide solution, acid water (sulfide hydrogen).
2) technological principle: the utility model is after original Crouse's recovery process hydrogenation plant and hydrogenation reduction process chilling
This technological process device is accessed in device front end.This technique considers that exhaust gas component is disposed when processing driving and parking damage, and after
Continuous acidity water treatment problems: it is formed after adding hydrogen by Crouse company Process Gas in tail gas when damage, but due to matching disturbance
The problems such as dynamic, cause in tail gas that ingredient fluctuation is larger, ingredient is mainly H2S、SO2、S、CO2Deng；Subsequent acidic water mainly contains
H2S waste water.
Tail gas treatment process: it is molten that 32% concentration liquid alkaline is configured to 5%~10% with desalted water by liquid alkaline mixer 7
Liquid is stored in fluid cushion tank 2, is delivered in lye/stripper through liquid alkaline circulating pump, and tail gas to be processed is in lye/stripping
Tower middle and lower part enter in, the lye that top spray gets off come into full contact with and react on structured packing, by containing in tail gas
Sulfur material is completely converted into saline solution, and the saline solution of production is continued cycling through by entering communicating pipe inside fluid cushion tank 2
Spray-absorption, until absorbing liquid is saturated, it is subsequent to pass through lye due to absorbing part reaction heat during absorbing liquid cyclic absorption
Heat exchanger 4 carries out heat exchange, and control tower class absorbs temperature within 80 DEG C, and tower top pressure control guarantees to inhale in 10-30Kpa
It produces effects rate.After the normal smooth discharge of system is up to standard, lye circulation is out of service, and will be in the acid wastewater transportation to tower of subsequent generation
Carry out stripping disposition.
Acid water treatment technology: the acid water of subsequent generation to lye/stripper, passes through low pressure in tower by pipeline
Steam injection heating is simultaneously stirred, and subsequent acidic coolant-temperature gage is improved to 110 DEG C, by the H in the acid water of subsequent generation2S
Etc. being stripped in gas phase, enter hydrogenating reduction quenching apparatus regeneration from top of tower, it is defeated that acid water largely passes through purified water
Pump 5 is sent to carry out circulation stripping, until H in acid water2S content minimizes, and is down at least partially through the purification heat exchange of water- to-water heat exchanger 6
The laggard device of room temperature recycles.
The above is only the preferred embodiment of this patent, it is noted that for the ordinary skill people of the art
For member, under the premise of not departing from the art of this patent principle, several improvement and replacement can also be made, these are improved and replacement
Also it should be regarded as the protection scope of this patent.
Claims (1)
1. tail gas and subsequent acidic water treatment facilities when a kind of damage, it is characterised in that: including alkali cleaning/stripper,
Fluid cushion tank, NaOH solution circulating pump, lye heat exchanger, purified water delivery pump, purification water- to-water heat exchanger and liquid alkaline mixer, the alkali
Wash/stripper in be provided with three layers of spray equipment up and down, upper layer spray equipment is circumscribed with desalted water inlet pipe, the spray in middle layer and lower layer
Shower device connects fluid cushion pot bottom by inlet pipe, and the NaOH solution circulating pump and lye heat exchanger are arranged in inlet pipe
On, the alkali cleaning/stripper top is connected with tail gas comb, is connected under lower layer's spray equipment in the middle part of alkali cleaning/stripper
Side adds hydrogen tail gas inlet pipe, and alkali cleaning/stripper bottom is connected with low-pressure steam inlet pipe, alkali cleaning/stripper bottom and alkali cleaning/stripping
Circulation line is connected between in the middle part of tower, the purified water delivery pump and purification water- to-water heat exchanger are arranged on circulation line, described
Acid water inlet pipe is connected on circulation line, circulation line is connected with fluid cushion tank top by inlet tube, fluid cushion
Tank lower part connects liquid alkaline mixer by inlet tube, and the liquid alkaline mixer is connected with liquid alkaline inlet pipe and desalted water inlet pipe, liquid
It is connected in the middle part of alkali cleaning/stripper by return line at the top of surge tank, the desalted water inlet pipe, inlet pipe, low pressure are steamed
Vapour inlet pipe, circulation line are provided with valve on inlet tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821978435.3U CN209237691U (en) | 2018-11-15 | 2018-11-15 | Tail gas and subsequent acidic water treatment facilities when a kind of damage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821978435.3U CN209237691U (en) | 2018-11-15 | 2018-11-15 | Tail gas and subsequent acidic water treatment facilities when a kind of damage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209237691U true CN209237691U (en) | 2019-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821978435.3U Active CN209237691U (en) | 2018-11-15 | 2018-11-15 | Tail gas and subsequent acidic water treatment facilities when a kind of damage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109351158A (en) * | 2018-11-15 | 2019-02-19 | 山东金典化工有限公司 | Tail gas and subsequent acidic water treatment facilities and method when a kind of damage |
-
2018
- 2018-11-15 CN CN201821978435.3U patent/CN209237691U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109351158A (en) * | 2018-11-15 | 2019-02-19 | 山东金典化工有限公司 | Tail gas and subsequent acidic water treatment facilities and method when a kind of damage |
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