CN205973827U - Gas system is produced to synthetic ammonia steam - Google Patents
Gas system is produced to synthetic ammonia steam Download PDFInfo
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- CN205973827U CN205973827U CN201620839276.3U CN201620839276U CN205973827U CN 205973827 U CN205973827 U CN 205973827U CN 201620839276 U CN201620839276 U CN 201620839276U CN 205973827 U CN205973827 U CN 205973827U
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Abstract
The utility model discloses a gas system is produced to synthetic ammonia steam, the desalinized water gets into the oxygen -eliminating device from upper portion, be provided with the 0.4Mpa low pressure steam import bottom the oxygen -eliminating device, be provided with the hydrazine import in the lower part of oxygen -eliminating device, the hydrazine import links to each other with the hydrazine syringe pump, the hydrazine syringe pump links to each other with the hydrazine storage tank, the desalinized water export of oxygen -eliminating device links to each other with boiler feed pump, on the pipeline that the exit linkage of aqueous ammonia syringe pump links to each other to oxygen -eliminating device and boiler feed pump, aqueous ammonia syringe pump links to each other with ammonia water storage tank, set up water inlet manifold on boiler feed pump's the delivery port, the phosphate solution storage tank leads to the perphosphate pipeline and mixes the liquid syringe pump and links to each other, the sodium hydroxide solution syringe pump passes through the pipe connection to the phosphate pipeline, the export that mixes the liquid syringe pump is through mixing the liquid pipe connection to the water inlet manifold, water inlet manifold is last set up respectively with the conversion boiler, the branch pipe that the hypermutation boiler links to each other with synthetic boiler, the conversion boiler, the steam outlet of hypermutation boiler links to each other with the strip tower, improve feed water quality of water.
Description
Technical field
This utility model is related to a kind of synthesis ammonia steam gas production system, belongs to ammonia synthesis unit field.
Background technology
Nitrogen fertilizer plant's ammonia synthesis process main-process stream is：Initially enter natural gas distribution station, sky from the natural gas of long-distance transport pipes
So gas enters the room temperature desulphurization system of synthetic ammonia installation after gas distribution station enters row buffering and pressure regulation, then passes through natural gas compressing,
High temperature desulfurizing, one section of steam conversion of heat exchange type, the conversion of two-stage nitration oxygen-enriched air, carbon monoxide high and low temperature converts, and improves hot potash method
Decarburization, methanation deep purifying removes remaining CO and CO2, synthesis gas compression, ammonia synthesis under 14.0MPa, freeze and separate, finally
Obtain product liquefied ammonia.
The steam gas production system that this utility model is related to mainly uses the used heat next life producing in production of synthetic ammonia
Produce the middle pressure steam of 4.2MPa and the secondary middle pressure steam of 2.5MPa.Boiler feed water is derived from removal bitter and fishiness, due to steam pressure relatively
Height, this is higher to the water quality requirement of boiler.In design, the requirement to boiler water water quality mainly has total salt content, dissolved oxygen, PH
Value, silicon dioxide, phosphate radical etc..Above index strictly should be controlled, so that it is guaranteed that boiler is in process of production on producing
Safety and ensure steam quality.
Utility model content
In order to solve above-mentioned technical problem, this utility model provides a kind of synthesis ammonia steam gas production system, can improve boiler
Water water quality.
To achieve these goals, the technical solution of the utility model is as follows：A kind of synthesis ammonia steam gas production system, including
Produce the conversion boiler of the middle pressure steam of 4.2MPa and the high synthesis boiler becoming boiler and producing 2.5MPa middle pressure steam, its feature
It is：Also include oxygen-eliminating device, boiler feed pump, hydrazine storage tank, hydrazine syringe pump, ammonia storage tank, ammonia syringe pump, phosphate molten
Liquid storage tank, mixed liquor syringe pump, sodium hydroxide solution storage tank and sodium hydroxide solution syringe pump, from the desalination of removal bitter and fishiness
Water enters oxygen-eliminating device from top, described oxygen-eliminating device bottom is provided with 0.4Mpa low pressure steam inlet, under described oxygen-eliminating device
Portion is provided with hydrazine import, and described hydrazine import is connected with hydrazine syringe pump by pipeline, and described hydrazine syringe pump is store with hydrazine
Groove is connected, and the desalination water out of described oxygen-eliminating device is connected with the import of boiler feed pump by pipeline, described ammonia syringe pump
Outlet is connected on the pipeline that oxygen-eliminating device is connected with boiler feed pump by pipeline, described ammonia syringe pump and ammonia storage tank phase
Even, the outlet of described boiler feed pump is arranged water inlet manifold, described phosphate solution storage tank passes through phosphate pipeline and mixes
Close liquid injection pump inlet to be connected, described sodium hydroxide solution storage tank is passed through pipeline and is connected with sodium hydroxide solution injection pump inlet,
The outlet of described sodium hydroxide solution syringe pump is connected on phosphate pipeline by pipeline, the outlet of described mixed liquor syringe pump
It is connected to the initiating terminal of water inlet manifold by mixed liquor pipeline, described water inlet manifold is arranged and becomes pot with conversion boiler, height respectively
The arm that stove is connected with synthesis boiler, described conversion boiler, the high steam (vapor) outlet becoming boiler are connected with stripper, described stripper
Steam (vapor) outlet be connected with steam-flow meter.
In such scheme：The top of described oxygen-eliminating device is additionally provided with blow-down pipe, and described blow-down pipe is provided with emptying
Valve.
In such scheme：First valve is arranged on described mixed liquor pipeline, on each arm on described water inlet manifold
It is respectively arranged with the second valve.The so convenient amount controlling the water adding each boiler.
In such scheme, from removal bitter and fishiness desalted water first from the top of oxygen-eliminating device enter, desalted water with
The low-pressure steam of 0.4MPa carries out counter current contacting inside oxygen-eliminating device, is dissolved in the oxygen inside desalted water and is heated by low-pressure steam
And be stripped out, steam and oxygen are directly discharged to inside air by blow-down pipe.Meanwhile, add connection inside oxygen-eliminating device
Ammonia, is reacted with the trace oxygen thoroughly not removed by steam inside desalted water by hydrazine, reaches thorough removal oxygen
Purpose.
The ammonia that boiler water after deoxygenation is sent with ammonia syringe pump enters the import of boiler feed pump, ammonia after being mixed
Water add the purpose of boiler water be the pH value adjusting boiler water in the indication range of 8.8-9.2, prevent boiler water to be in acid rotten
Erosion boiler, thus the use to boiler brings potential safety hazard.Ammonia inside ammonia eventually enters into steam after heating inside boiler
The inside so that the ammon amount of steam increases, when carrying out air stripping later, due in the process condensate that is stripped containing substantial amounts of
Carbon dioxide, carbon dioxide and ammonia react generation carbon ammonium, can block steam-flow meter.Therefore we also design sodium hydroxide solution
Storage tank, when desalted water pH is relatively low, then selecting to add sodium hydroxide solution, thus reducing the addition of ammonia, being lowered into steaming
The content of the ammonia in vapour.
Boiler water respectively enters conversion boiler, high change boiler and synthesis boiler after boiler feed pump pressurization.
Phosphate storage tank store concentration be 1500PPm about aqueous phosphatic, phosphate add boiler water mesh
Be to allow the calcium ion inside phosphate and boiler water react production grain slag, by blowdown pipeline, grain slag is discharged to out-of-bounds, thus
Guarantee that boiler heat exchange tubulation is not deposited on tubulation surface scale because of the concentration of calcium ion concentration, lead to boiler tubulation heat exchange efficiency
Reduction, under serious conditions also can give boiler safety in production bring serious hidden danger.Phosphate solution and sodium hydroxide solution
It is added into respectively after water inlet manifold is mixed with desalted water by mixed liquor syringe pump after mixing and enter each boiler, rather than point
It is not added directly into conversion boiler, high change boiler and synthesis boiler.This is because conversion boiler and the high steam becoming boiler generation
Pressure is 4.2MPa, is 2.5MPa middle pressure steam pressure higher than synthesis boiler generation, if being directly added into each boiler, will
Phosphate is led to add the amount of each boiler to mismatch, the high conversion boiler of pressure and the high boiler addition that becomes are few, pressure
Low synthesis boiler addition is more, causes phosphate content inside conversion boiler and high change boiler very low it is impossible to effectively go
Except the calcium ion inside stove water, and synthesize and inside boiler, add excessive phosphate that substantial amounts of medicine can be caused to waste.We select
Select and allow phosphate solution first to mix with desalted water, add each boiler, it is to avoid each boiler steam that pressure etc. does not cause plus
The uneven situation of medicine, phosphate solution is even added to inside boiler according to the water consumption of each boiler, and the index of phosphate radical obtains
To effective control.
Conversion boiler and the high middle pressure steam becoming boiler by-product 4.2MPa, middle pressure steam enters from the bottom of stripper, with
The process condensate entering from stripper top carries out counter current contacting, the CO inside process condensate2It is stripped out and steam
Pass through steam-flow meter, the middle pressure steam after metering uses as process steam mainly for conversion system after mixing.Close
Become the secondary middle pressure steam of boiler by-product 2.5MPa, this some vapor is sent to time middle pressure steam pipe network and makes for other process units
With.
Beneficial effect：This utility model, first under the collective effect of low-pressure steam and hydrazine, thoroughly removes in desalted water
The oxygen in face, it is to avoid the corrosion that micro amount of oxygen causes to boiler.Combine to adjust pH by sodium hydroxide and ammonia, it is to avoid ammonia
Excessive addition, thus reduce the content of ammonia in steam.It is uniformly added into by phosphatic, remove the calcium ion in desalted water, from
And reach the purpose improving boiler water water quality it is ensured that the quality of the steam producing, reduce the corrosion to equipment and blocking.
Brief description
Fig. 1 is process chart of the present utility model.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples：
Embodiment 1, as shown in Figure 1：Synthesis ammonia steam gas production system of the present utility model is by the middle pressure steam producing 4.2MPa
Conversion boiler 1 and high become boiler 2, the synthesis boiler 3 producing 2.5MPa middle pressure steam, oxygen-eliminating device 4, boiler feed pump 5, hydrazine
Storage tank 6, hydrazine syringe pump 7, ammonia storage tank 8, ammonia syringe pump 9, phosphate solution storage tank 10, mixed liquor syringe pump 11, hydrogen-oxygen
Change sodium solution storage tank 12, sodium hydroxide solution syringe pump 13, water inlet manifold 14, stripper 15, steam-flow meter 16, the first valve
17th, the part such as second valve 18 composition.
Desalted water from removal bitter and fishiness enters oxygen-eliminating device 4 from top, and oxygen-eliminating device 4 bottom is provided with 0.4Mpa low pressure
Steam inlet 4a, is provided with hydrazine import 4b in the bottom of oxygen-eliminating device 4, and the top of oxygen-eliminating device 4 is additionally provided with blow-down pipe 4c, emptying
Atmospheric valve 4d is provided with pipe 4c.Hydrazine import 4b is connected with hydrazine syringe pump 7 by pipeline, hydrazine syringe pump 7 and hydrazine
Storage tank 6 is connected, and the desalination water out of oxygen-eliminating device 4 is connected with the import of boiler feed pump 5 by pipeline, the going out of ammonia syringe pump 9
Mouth is connected on the pipeline that oxygen-eliminating device 4 is connected with boiler feed pump 5 by pipeline, and pipeline and ammonia are passed through in ammonia syringe pump 9 import
Water storage tank 8 is connected, and the outlet of boiler feed pump 5 arranges water inlet manifold 14, and phosphate solution storage tank 10 passes through phosphate pipe
Road is connected with mixed liquor syringe pump 11 import, and sodium hydroxide solution storage tank 12 is entered with sodium hydroxide solution syringe pump 13 by pipeline
Mouth is connected, and the outlet of sodium hydroxide solution syringe pump 13 is connected on phosphate pipeline by pipeline, mixed liquor syringe pump 11
Outlet is connected to the initiating terminal of water inlet manifold 14 by mixed liquor pipeline, and mixed liquor pipeline arranges the first valve 17, and water inlet is total
The arm being connected with conversion boiler 1, high change boiler 2 and synthesis boiler 3 respectively, each on water inlet manifold 14 are arranged on pipe 14
Second valve 18 is respectively arranged with pipe, phosphate solution enters each boiler with desalted water after mixing.Conversion boiler 1, high change
The steam (vapor) outlet of boiler 2 is connected with the steam inlet of stripper 15 bottom, the top setting process condensate import of stripper 15,
It is contained within carbon dioxide from the low process condensate becoming operation, enter from the top of stripper 15, the bottom of stripper 15 sets
Put process condensate outlet.The overhead vapor outlet of stripper 15 is connected with steam-flow meter 16.Steam passes through steam-flow meter
16 go conversion procedure to react.
This utility model is not limited to above-described embodiment it will be appreciated that those of ordinary skill in the art need not be creative
Work just can make many modifications and variations according to design of the present utility model.All technical staff in the art are according to this reality
Pass through the available technical side of logical analysis, reasoning, or a limited experiment with new design on the basis of existing technology
Case, all should be in the protection domain being defined in the patent claims.
Claims (3)
1. a kind of synthesis ammonia steam gas production system, the conversion boiler (1) including the middle pressure steam producing 4.2MPa and high change boiler (2)
And produce 2.5MPa middle pressure steam synthesis boiler (3) it is characterised in that：Also include oxygen-eliminating device (4), boiler feed pump (5),
Hydrazine storage tank (6), hydrazine syringe pump (7), ammonia storage tank (8), ammonia syringe pump (9), phosphate solution storage tank (10), mixed liquor
Syringe pump (11), sodium hydroxide solution storage tank (12) and sodium hydroxide solution syringe pump (13), from the desalination of removal bitter and fishiness
Water enters oxygen-eliminating device (4) from top, described oxygen-eliminating device (4) bottom is provided with 0.4Mpa low pressure steam inlet (4a), described
The bottom of oxygen-eliminating device (4) is provided with hydrazine import (4b), and described hydrazine import (4b) passes through pipeline and hydrazine syringe pump (7) phase
Even, described hydrazine syringe pump (7) is connected with hydrazine storage tank (6), and the desalination water out of described oxygen-eliminating device (4) passes through pipeline and boiler
The import of feed pump (5) is connected, and the outlet of described ammonia syringe pump (9) is connected to oxygen-eliminating device (4) and boiler feedwater by pipeline
On the pipeline that pump (5) is connected, described ammonia syringe pump (9) is connected with ammonia storage tank (8), the water outlet of described boiler feed pump (5)
Setting water inlet manifold (14) on mouth, described phosphate solution storage tank (10) is entered with mixed liquor syringe pump (11) by phosphate pipeline
Mouth is connected, and described sodium hydroxide solution storage tank (12) is connected with sodium hydroxide solution syringe pump (13) import by pipeline, described
The outlet of sodium hydroxide solution syringe pump (13) is connected on phosphate pipeline by pipeline, described mixed liquor syringe pump (11)
Outlet is connected to the initiating terminal of water inlet manifold (14) by mixed liquor pipeline, described water inlet manifold (14) is upper arrange respectively with conversion
The arm that boiler (1), high change boiler (2) and synthesis boiler (3) are connected, described conversion boiler (1), the high steam becoming boiler (2)
Outlet is connected with stripper (15), and the steam (vapor) outlet of described stripper (15) is connected with steam-flow meter (16).
2. according to claim 1 synthesis ammonia steam gas production system it is characterised in that：The top of described oxygen-eliminating device (4) also sets
It is equipped with blow-down pipe (4c), described blow-down pipe (4c) is provided with atmospheric valve (4d).
3. according to claim 1 or claim 2 synthesis ammonia steam gas production system it is characterised in that：Arrange on described mixed liquor pipeline
First valve (17), each arm on described water inlet manifold (14) is respectively arranged with the second valve (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620839276.3U CN205973827U (en) | 2016-08-04 | 2016-08-04 | Gas system is produced to synthetic ammonia steam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620839276.3U CN205973827U (en) | 2016-08-04 | 2016-08-04 | Gas system is produced to synthetic ammonia steam |
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| Publication Number | Publication Date |
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| CN205973827U true CN205973827U (en) | 2017-02-22 |
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| CN201620839276.3U Active CN205973827U (en) | 2016-08-04 | 2016-08-04 | Gas system is produced to synthetic ammonia steam |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107990299A (en) * | 2017-10-25 | 2018-05-04 | 山西潞安煤基精细化学品有限公司 | A kind of water supply line for converting feedwater preheater |
| CN109734104A (en) * | 2018-11-27 | 2019-05-10 | 重庆建峰化工股份有限公司 | A kind of device and method of the periodic off-gases system production ammonium hydroxide using synthesis ammonia |
| CN110686230A (en) * | 2019-10-10 | 2020-01-14 | 王彦淳 | Method for adjusting pH value of boiler feed water |
-
2016
- 2016-08-04 CN CN201620839276.3U patent/CN205973827U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107990299A (en) * | 2017-10-25 | 2018-05-04 | 山西潞安煤基精细化学品有限公司 | A kind of water supply line for converting feedwater preheater |
| CN109734104A (en) * | 2018-11-27 | 2019-05-10 | 重庆建峰化工股份有限公司 | A kind of device and method of the periodic off-gases system production ammonium hydroxide using synthesis ammonia |
| CN109734104B (en) * | 2018-11-27 | 2022-02-08 | 重庆建峰化工股份有限公司 | Device and method for producing ammonia water by using purge gas system of synthetic ammonia |
| CN110686230A (en) * | 2019-10-10 | 2020-01-14 | 王彦淳 | Method for adjusting pH value of boiler feed water |
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