CN206654732U - Synthesize ammonia secondary reformer waste heat recycling system - Google Patents
Synthesize ammonia secondary reformer waste heat recycling system Download PDFInfo
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- CN206654732U CN206654732U CN201720328029.1U CN201720328029U CN206654732U CN 206654732 U CN206654732 U CN 206654732U CN 201720328029 U CN201720328029 U CN 201720328029U CN 206654732 U CN206654732 U CN 206654732U
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- steam
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- secondary reformer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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Abstract
The utility model discloses one kind to synthesize ammonia secondary reformer waste heat recycling system, including secondary reformer body, its top is provided with process gas admission line and air inlet pipeline, the steam aerogenesis interlayer that can bear 0.4MPa low-pressure steam pressure is provided with outside the secondary reformer body, the top of the steam aerogenesis interlayer is provided with low-pressure steam pipeline, steam pressure regulation valve group is provided with the low-pressure steam pipeline, the top of the steam aerogenesis interlayer is provided with boiler feedwater water inlet pipe, the boiler feedwater water inlet pipe is connected with boiler feed pump, pressure-regulating valve group and Liquid level adjusting valve group are provided with the boiler feedwater water inlet pipe.Improved by the utility model, the heat of high temperature of recovery secondary reformer furnace wall is used for rich production low-pressure steam, reduces the consumption of recirculated water and desalted water, the energy consumption of synthetic ammonia installation is significantly reduced, and achieves significant economic benefit.
Description
Technical field
A kind of synthesis ammonia secondary reformer waste heat recycling system is the utility model is related to, belongs to ammonia synthesis process field.
Background technology
Nitrogen fertilizer plant's ammonia synthesis process main-process stream is：Natural gas from long-distance transport pipes initially enters natural gas distribution station, day
Right gas enters the normal temperature desulphurization system of synthetic ammonia installation after gas distribution station enters row buffering and pressure regulation, then by natural gas compressing,
High temperature desulfurizing, one section of steam conversion of heat exchange type, two sections of oxygen-enriched air conversions, the conversion of carbon monoxide high and low temperature, improves hot potash method
Decarburization, methanation deep purifying remove remaining CO and CO2, and synthesis gas compresses, ammonia synthesis under 14.0MPa, freezing separation, finally
Obtain product liquefied ammonia.
Synthetic ammonia installation gas making process enters heat exchange using Auto-thermal reforming process after the heating of natural gas mixed vapour
The tube side of formula reburner, reaction generates CO, CO to most of natural gas in the presence of catalyst in tube side2And H2, fraction is anti-
The natural gas and reacted process gas answered enter from the top of secondary reformer after being come out together from the tube side of heat-exchanged reformer.
Enter from the oxygen-enriched air that heating furnace comes from the top of secondary reformer, process gas is with oxygen-enriched air after the top contact of secondary reformer
Reacted again, now the methane inside natural gas is substantially completely converted into CO, CO2And H2, reacted process gas from
The bottom of secondary reformer enters the shell side of heat-exchanged reformer after coming out, the heat that the process gas of high temperature provides is enough to support to exchange heat
Formula reburner tube side reaction institute calorific requirement, last process gas enter conversion pot after being come out from the shell side bottom of heat-exchanged reformer
Stove produces middle pressure steam.
1250 DEG C or so of high temperature can be produced because natural gas, steam and oxygen-enriched air react inside secondary reformer, and two
Section furnace apparatus shell material is designed as 16MnR, can not bear so high temperature, to solve this problem, require setting in design
Standby the inside one layer of refractory material of liner, also needs to install the water leg that one layer of ordinary carbon steel material is made outside apparatus casing, in chuck
Face adds desalted water, and desalted water enters from the bottom of water leg, and top overflow returns to jacket water (J.W.) groove, in constantly cyclic process
In, the heat of high temperature of secondary reformer housing is desalted water and taken away, so that it is guaranteed that equipment is safe to use.
Chuck tank comes from desalination supply mains with water, and desalted water enters from the top of chuck tank, and desalted water is by folder
Enter after covering water pump pressurization from the bottom of secondary reformer water leg, the desalination coolant-temperature gage after the heating of secondary reformer housing is in 95-98
DEG C, the desalted water after heating enters overflow tank from the top elder generation overflow of water leg, then sequentially enters heat exchanger and water cooler
After heat exchange, the temperature of desalted water drops to 40-45 DEG C and returns to chuck tank to be recycled again.
When desalted water is after multiple circulating-heating use, the ion inside desalted water is constantly concentrated, and this just needs
The desalted water of high concentration is regularly discharged, while supplements a part of fresh desalted water, ensures the indices control of desalted water
System is in the range of requiring.The bottom of secondary reformer water leg is also required to be provided with blowdown pipeline, mainly excludes desalted water in water
The impurity of deposition in chuck.What it is due to water leg holding is atmospheric pressure state, and sewer can only discharge on the spot.At the top of water leg
It is provided with exhausting pipeline to communicate with air, valve is not provided with pipeline, ensures the pressure stability of water leg in atmospheric pressure state.It is de-
Salt solution can produce a small amount of atmospheric steam after the furnace wall heating of secondary reformer, and this part vapor just directly passes through blow-down pipe
Road discharges.Partially desalted water can be also wasted during blowdown simultaneously, this will cause a large amount of consumption of desalted water.Desalted water is heated
Afterwards, also need to cool down desalted water using water cooler to recycle, this just needs to consume substantial amounts of recirculated water.Two
Some vapor can not be recycled due to being normal pressure, can only carry out emptying processing caused by the top of section stove water leg.Two sections
The temperature of stove furnace wall is up to several Baidu, and the technique is not recycled effectively not only to it, causes substantial amounts of desalination on the contrary
Water and recirculated water are consumed, and this make it that the energy expenditure of synthetic ammonia installation is higher.
Utility model content
In order to solve the above-mentioned technical problem, the utility model provides a kind of synthesis ammonia secondary reformer waste heat recycling system,
Energy-saving purpose can be really achieved.
To achieve these goals, the technical solution of the utility model is as follows：One kind synthesis ammonia secondary reformer waste heat recovery profit
With system, including secondary reformer body, its top is provided with process gas admission line and air inlet pipeline, it is characterised in that：Institute
State and be provided with the steam aerogenesis interlayer that can bear 0.4MPa low-pressure steam pressure outside secondary reformer body, in the steam aerogenesis interlayer
Top be provided with low-pressure steam pipeline, steam pressure regulation valve group, steam production are provided with the low-pressure steam pipeline
The top of air casing is provided with boiler feedwater water inlet pipe, and the boiler feedwater water inlet pipe is connected with boiler feed pump, the boiler
Pressure-regulating valve group and Liquid level adjusting valve group are provided with feedwater water inlet pipe.
The bottom of the steam aerogenesis interlayer sets blowdown pipeline, and blowoff valve, the row are provided with the blowdown pipeline
Dirty pipeline is connected with circulating water pool.
After above-mentioned improvement, directly using the high-temperature residual heat of secondary reformer furnace wall come rich production low-pressure steam, it is not necessary to desalination
Water and recirculated water are cooled down, and avoid resource consumption, really play purpose that is energy-saving, turning waste into wealth.
In such scheme：The pressure-regulating valve group includes pressure-regulating valve body, in the pressure-regulating valve body
Choke valve is provided with the boiler feedwater water inlet pipe of front and rear side；The Liquid level adjusting valve group includes Liquid level adjusting valve body, in institute
State and be also equipped with choke valve on the boiler feedwater water inlet pipe of side before and after Liquid level adjusting valve body.Also include the first by-pass line and the
Two by-pass lines, the both ends of first by-pass line are connected to the boiler feedwater water inlet of the front and rear side of pressure-regulating valve group
Guan Shang, the both ends of second by-pass line are connected on the boiler feedwater water inlet pipe of the front and rear side of Liquid level adjusting valve group,
Valve is respectively arranged with first by-pass line and the second by-pass line., can be with when there are emergency situations or maintenance
Use by-pass line.
Beneficial effect：To be improved by the utility model, the heat of high temperature of recovery secondary reformer furnace wall is used for rich production low-pressure steam,
The consumption of recirculated water and desalted water is reduced, the energy consumption of synthetic ammonia installation is significantly reduced, and achieves significant economic benefit.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
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 secondary reformer waste heat recycling system of the present utility model is by secondary reformer sheet
Body 1, process gas admission line 11, air inlet pipeline 12, steam aerogenesis interlayer 2, boiler feedwater water inlet pipe 21, the first shunt valve
Line 22, the second by-pass line 23, low-pressure steam pipeline 24, pressure-regulating valve group, Liquid level adjusting valve group, blowdown pipeline 5, blowoff valve
6th, steam pressure regulation valve group 7 forms.
The top of secondary reformer body 1 is provided with process gas admission line 11 and air inlet pipeline 12, states outside secondary reformer body 1
The steam aerogenesis interlayer 2 of 0.4MPa low-pressure steam pressure can be born by being provided with, and the top of steam aerogenesis interlayer 2 is provided with low pressure
Steam pipe line 24, low-pressure steam pipeline 24 are connected with 0.4MPa low-pressure steam house stewards, and steam is provided with low-pressure steam pipeline 24
Pressure-regulating valve group 7, including steam pressure regulation valve body and the choke valve positioned at its both sides, set on low-pressure steam pipeline 24
Steam by-pass pipeline is equipped with, the both ends of steam by-pass pipeline are connected to the both sides of steam pressure regulation valve group 7.Steam aerogenesis
The top of interlayer 2 is provided with boiler feedwater water inlet pipe 21, and boiler feedwater water inlet pipe 21 is connected with boiler feed pump, and boiler feedwater is entered
Pressure-regulating valve group and Liquid level adjusting valve group are provided with water pipe 21.Pressure-regulating valve group includes pressure-regulating valve body 3, is pressing
Choke valve is provided with the boiler feedwater water inlet pipe 21 of the front and rear side of force regulating valve body 3；Liquid level adjusting valve group is adjusted including liquid level
Valve body 4 is saved, is also equipped with choke valve on the boiler feedwater water inlet pipe 21 of side before and after the Liquid level adjusting valve body 4.First bypass
The both ends of pipeline 22 are connected on the boiler feedwater water inlet pipe 21 of the front and rear side of pressure-regulating valve group 3, the second by-pass line
23 both ends are connected on the boiler feedwater water inlet pipe 21 of the front and rear side of Liquid level adjusting valve group 4, in the first by-pass line 22
Valve is respectively arranged with the second by-pass line 23.
The bottom of steam aerogenesis interlayer 2 sets blowdown pipeline 5, is provided with blowoff valve 6 on blowdown pipeline 5, blowdown pipeline 5 with
Circulating water pool is connected.
The utility model is not limited to above-mentioned specific embodiment, it will be appreciated that one of ordinary skill in the art is without wound
The property made work can makes many modifications and variations according to design of the present utility model.In a word, all technologies in the art
Personnel can be obtained by logical analysis, reasoning, or a limited experiment on the basis of existing technology according to design of the present utility model
The technical scheme arrived, all should be in the protection domain being defined in the patent claims.
Claims (4)
1. one kind synthesis ammonia secondary reformer waste heat recycling system, including secondary reformer body (1), its top are provided with process gas and entered
Gas pipeline (11) and air inlet pipeline (12), it is characterised in that：0.4MPa can be born by being provided with outside the secondary reformer body (1)
The steam aerogenesis interlayer (2) of low-pressure steam pressure, the top of the steam aerogenesis interlayer (2) is provided with low-pressure steam pipeline
(24), be provided with the low-pressure steam pipeline (24) steam pressure regulation valve group (7), the steam aerogenesis interlayer (2) it is upper
Portion is provided with boiler feedwater water inlet pipe (21), and the boiler feedwater water inlet pipe (21) is connected with boiler feed pump, and the boiler is given
Water water inlet pipe is provided with pressure-regulating valve group and Liquid level adjusting valve group on (21).
2. ammonia secondary reformer waste heat recycling system is synthesized according to claim 1, it is characterised in that：The steam aerogenesis folder
The bottom of layer (2) sets blowdown pipeline (5), is provided with blowoff valve (6) on the blowdown pipeline (5), the blowdown pipeline (5) with
Circulating water pool is connected.
3. synthesis ammonia secondary reformer waste heat recycling system according to claim 1 or claim 2, it is characterised in that：The pressure is adjusted
Section valve group includes pressure-regulating valve body (3), the boiler feedwater water inlet pipe of side before and after the pressure-regulating valve body (3)
(21) choke valve is provided with；The Liquid level adjusting valve group includes Liquid level adjusting valve body (4), in the Liquid level adjusting valve body
(4) choke valve is also equipped with before and after on the boiler feedwater water inlet pipe (21) of side.
4. ammonia secondary reformer waste heat recycling system is synthesized according to claim 3, it is characterised in that：Also include the first bypass
Pipeline (22) and the second by-pass line (23), the both ends of first by-pass line (22) are connected to pressure-regulating valve group
On the boiler feedwater water inlet pipe (21) of front and rear side, the both ends of second by-pass line (23) are connected to Liquid level adjusting valve group
Front and rear side boiler feedwater water inlet pipe (21) on, on first by-pass line (22) and the second by-pass line (23) respectively
It is provided with valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720328029.1U CN206654732U (en) | 2017-03-30 | 2017-03-30 | Synthesize ammonia secondary reformer waste heat recycling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720328029.1U CN206654732U (en) | 2017-03-30 | 2017-03-30 | Synthesize ammonia secondary reformer waste heat recycling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206654732U true CN206654732U (en) | 2017-11-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720328029.1U Active CN206654732U (en) | 2017-03-30 | 2017-03-30 | Synthesize ammonia secondary reformer waste heat recycling system |
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| Country | Link |
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| CN (1) | CN206654732U (en) |
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2017
- 2017-03-30 CN CN201720328029.1U patent/CN206654732U/en active Active
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