CN106379915A - Urea desorption hydrolysis tower - Google Patents
Urea desorption hydrolysis tower Download PDFInfo
- Publication number
- CN106379915A CN106379915A CN201610754173.1A CN201610754173A CN106379915A CN 106379915 A CN106379915 A CN 106379915A CN 201610754173 A CN201610754173 A CN 201610754173A CN 106379915 A CN106379915 A CN 106379915A
- Authority
- CN
- China
- Prior art keywords
- tower
- baffle plate
- overflow launder
- tower body
- urea
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/02—Preparation, purification or separation of ammonia
- C01C1/08—Preparation of ammonia from nitrogenous organic substances
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/10—Treatment of water, waste water, or sewage by heating by distillation or evaporation by direct contact with a particulate solid or with a fluid, as a heat transfer medium
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Analytical Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
A urea desorption hydrolysis tower comprises a column tray, an overflow groove baffle plate, a liquid inlet, a steam inlet and a tower body. The top of the tower body is provided with the liquid inlet. The bottom of the tower body is equipped with the steam inlet. The column tray and the overflow groove baffle plate are arranged inside the tower body. The overflow groove baffle plate and the column tray are melted together. The overflow groove baffle plate is 5 cm higher than the column tray. Mainly by increasing height of the overflow groove baffle plate, retention time of a liquid staying on the column tray is increased so as to achieve the purpose of recovering ammonia and CO2. By research and application of the precise structure of the column tray part, steam efficiency of the desorption tower can be effectively enhanced. Meanwhile, conductivity of a process condensate can be effectively reduced, and the process condensate can be recovered for desalinized water. On the original operation basis, the tower of the invention is more stable and convenient.
Description
Technical field
The invention belongs to desorption hydrolysis tower, specially urea desorption hydrolysis tower.
Background technology
Revamp of Urea in existing ammonia synthesis process is sieve-plate tower, and desorption system operating mode is unstable, waste liquid ammonia content
When, have exceeded, reaches 0.1%, in order to control useless ammonia content index, only increases steam consumption, leads to steam consumption to rise 1t/
h；Find that in maintenance desorption tower tray floor fouling is serious, lead to aperture clogs, in production process, there is support liquid phenomenon.Waste liquid ammonia contains
Amount is not up to standard to lead to discharging of waste liquid to be reprocessed to sewage plant, causes ammonia nitrogen total emission volumn to increase, environmental protection pressure increases.Consider simultaneously
Send the corrosion to gas making chuck after gas making to waste liquid, be unfavorable for the stable operation of whole synthesis technique.Due to Revamp of Urea
Desorption quantity is typically only capable to reach 18-22m3/ h, the waste liquid of exclusion can only be up to standard reluctantly, therefore, more can only receive urea originally
The ammoniacal liquor that body produces is it is impossible to receive the ammoniacal liquor that refining produces.In Ammonia Production technological process, refining workshop section is inhaled with desalted water
Ending gas ammonia will produce weak aqua ammonia, and the ammoniacal liquor of refining can only send desulfurization and urea, if do not needed when desulfurization ammoniacal liquor titre is high
Refined ammonia dilutes, and refined ammonia just can only send urea workshop section, reclaim ammonia by desorption apparatus；When desulfurization ammoniacal liquor titre is high just
The ammoniacal liquor of refining can be received.
Country advocates energy-saving and environmental protection etc., and all are conducive to country, the production system technical research of enterprise and transformation,
According to country 13 Growth of Chemical Fertilizer Industry planning, the preferential technical research restoration and reuse supporting existing urea enterprise, increase nitrogen
Fertile enterprise raw material and the policy of dynamic structure adjustment dynamics, it is urine that Revamp of Urea realizes the operation of urea desorption and hydrolysis system tower tray
The implementation internal R＆D restoration and reuse that white, quiet clothes are put, reaches the approach of the development of energy-saving synergy.
Content of the invention
It is an object of the invention to provide urea desorption hydrolysis tower, solve the problems, such as in background technology.
The present invention employs the following technical solutions realization：
Urea desorbs hydrolysis tower, including tower tray, overflow launder baffle plate, liquid inlet, steam inlet and tower body, described tower body top
Portion is provided with liquid inlet, and described tower body bottom is provided with steam inlet, and described tower body is internally provided with tower tray and overflow launder gear
Plate, described overflow launder baffle plate is welded with tower tray, and the height that described overflow launder baffle plate exceeds tower tray is 5cm.
In the present invention, connected by overflow launder baffle plate between adjacent trays.
In the present invention, connected by tower tray between adjacent overflow launder baffle plate.
Beneficial effect：The present invention mainly passes through to increase overflow launder liquid barrier height, when increasing stop on tower tray for the liquid
Between, make ammonia and CO2Reach the purpose of recovery, research application tray section fine structure, desorber steam efficiency can be effectively improved,
Effectively reduce the electrical conductivity of process condensate, by process condensate recoverable to desalted water, and in original operation simultaneously
On the basis of be changed into more stable convenient.
Brief description
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the partial structural diagram of tower tray of the present invention and overflow launder baffle plate.
Specific embodiment
In order that technological means, creation characteristic, reached purpose and effect that the present invention realizes are easy to understand, tie below
Conjunction is specifically illustrating, and the present invention is expanded on further.
Referring to Fig. 1, urea desorbs the structural representation of hydrolysis tower, and urea desorbs hydrolysis tower, including tower tray 1, overflow launder gear
Plate 2, liquid inlet 3, steam inlet 4 and tower body 5, described tower body 5 top is provided with liquid inlet 3, the setting of described tower body 5 bottom
There is steam inlet 4, described tower body 5 is internally provided with tower tray 1 and overflow launder baffle plate 2, described overflow launder baffle plate 2 and tower tray 1 weld,
The height that described overflow launder baffle plate 2 exceeds tower tray 1 is 5cm, is connected by overflow launder baffle plate 2, adjacent overflow between adjacent trays 1
Connected by tower tray 1 between groove baffle plate 2.
Referring to Fig. 2, the partial structural diagram of urea desorption hydrolysis tower tray floor and overflow launder baffle plate, the present invention passes through to solve
Inhaling tower tower tray overflow launder liquid barrier increases to 5cm by 4cm, realizes urea desorption and hydrolysis system process condensate recovery and utilizes
To desalted water.
After present invention research and development restoration and reuse, device is realized improving the water quality of process condensate, reduces in process condensate
Process condensate recovery can be used desalted water, reduce the loss of water resource by ammonia and conductance.Reduce desalted water per hour
The rate of water make-up of 100t/h, that is, protect environment, reduces device consumption again.
After present invention research and development restoration and reuse, put realization and desorber steam utilization is reached best, make operating personnel simultaneously
Desorption and hydrolysis system operating flexibility is increased, increases desorber to ammonia and CO2Absorption, reduce steam consumption, from desorber
Average steam consumption originally per hour 21t/h about decline 18t/h up till now, 0.45MPa about saved by desorber
Steam 3t/h.
The present invention gradually reduces desorber and adds quantity of steam, realizes system process condensate liquid and is recovered to desalted water, by analysis
In process condensate ammonia and conductance content little≤the mode monitoring system process condensate water quality situation of 25PPm.
The present invention, by increasing tower tray overflow launder liquid barrier height, increases the time of staying on tower tray for the liquid, makes desorption
The steam of tower tray floor participates in reaction time prolongation, to research and development restoration and reuse tray section fine structure, can effectively improve desorber
Steam efficiency, effectively reduces the electrical conductivity of process condensate simultaneously, process condensate recoverable to desalted water drops simultaneously
The loss of low water resource, mitigation environmental protection pressure.
Overflow launder liquid barrier is to ensure that gas-liquid two-phase forms enough interphase mass transfer surfaces on column plate, and tower tray must keep
The liquid layer of certain depth, for this reason, the port of export in tower tray arranges overflow launder liquid barrier.On tower tray, height of liquid layer is to a great extent
Highly determined by liquid barrier.Uniform for ensureing liquor stream, also the entrance point in tower tray arranges import liquid barrier.With table below pair
Than, different tower tray baffle plate overflow height, in the case of corresponding flow parameter is constant, see below with heat flow (heat transfer) value changes relation
Table：
The variation relation of heat flow under table 1, different overflow launder baffle plate overflow height
As can be seen from the above table, when the height stating overflow launder baffle plate 2 and exceeding tower tray 1 is 5cm, only in flow parameter and
When heat flow is maximum, the ammonia in liquid and urea are recycled highest, and therefore height of baffle plate 5cm is optimum height.
Domestic certain urea system desorption tower tray floor transformation, implements research transformation in April, 2015 in November, 2015.This
Mesh has shown good economic benefit in actual production.
Before and after research and development restoration and reuse, operational factor is shown in Table 2 and table 3, and before in March, 2015 operational factor transformation in wherein, technique is cold
Lime set ammonia and conductance control in 2.81PPm and 33us/cm, and in November, 2015 operational factor is that real process condensate recovery utilizes
To desalted water.
Table 2, desorber (C801/C802) consumption quantity of steam operational factor contrast
Reach a conclusion by contrast：After transformation, daily desorber reduces steam and is about 3t/h.
Ammonia and the contrast of conductance operational factor in table 3 parsing hydrolysis system process condensate
Reach a conclusion by contrast：After transformation, process condensate recovery uses desalted water, recycles 100t/h per hour
Left and right, makes the ammonia in process condensate and conductance be reduced to desalted water ammonia content≤3PPm simultaneously, conductance≤25us/cm's
In the range of.
General principle and principal character and the advantages of the present invention of the present invention, the technology of the industry have been shown and described above
, it should be appreciated that the present invention is not restricted to the described embodiments, the simply explanation described in above-described embodiment and specification is originally for personnel
The principle of invention, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, these changes
Change and improvement both fall within scope of the claimed invention, claimed scope by appending claims and its
Equivalent thereof.
Claims (3)
1. urea desorption hydrolysis tower, including tower tray, overflow launder baffle plate, liquid inlet, steam inlet and tower body it is characterised in that
Described tower body top is provided with liquid inlet, and described tower body bottom is provided with steam inlet, and described tower body is internally provided with tower tray
With overflow launder baffle plate, described overflow launder baffle plate and tower tray welding, the height that described overflow launder baffle plate exceeds tower tray is 5cm.
2. urea desorption hydrolysis tower according to claim 1 is it is characterised in that pass through overflow launder baffle plate between adjacent trays
Connect.
3. urea desorption hydrolysis tower according to claim 1 is it is characterised in that pass through tower tray between adjacent overflow launder baffle plate
Connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610754173.1A CN106379915A (en) | 2016-08-30 | 2016-08-30 | Urea desorption hydrolysis tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610754173.1A CN106379915A (en) | 2016-08-30 | 2016-08-30 | Urea desorption hydrolysis tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106379915A true CN106379915A (en) | 2017-02-08 |
Family
ID=57917476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610754173.1A Pending CN106379915A (en) | 2016-08-30 | 2016-08-30 | Urea desorption hydrolysis tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106379915A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1215620A (en) * | 1997-10-27 | 1999-05-05 | 王成 | Plate tower for mass-transfer process with thermal reaction |
| CN206089064U (en) * | 2016-08-30 | 2017-04-12 | 贵州兴化化工股份有限公司 | Urea desorption tower of hydrolysising |
-
2016
- 2016-08-30 CN CN201610754173.1A patent/CN106379915A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1215620A (en) * | 1997-10-27 | 1999-05-05 | 王成 | Plate tower for mass-transfer process with thermal reaction |
| CN206089064U (en) * | 2016-08-30 | 2017-04-12 | 贵州兴化化工股份有限公司 | Urea desorption tower of hydrolysising |
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Application publication date: 20170208 |
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