CN204593366U - A kind of tubular heater depth energy-saving system - Google Patents
A kind of tubular heater depth energy-saving system Download PDFInfo
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- CN204593366U CN204593366U CN201520100050.7U CN201520100050U CN204593366U CN 204593366 U CN204593366 U CN 204593366U CN 201520100050 U CN201520100050 U CN 201520100050U CN 204593366 U CN204593366 U CN 204593366U
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- fuel gas
- tubular heater
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- temperature
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The utility model relates to a kind of tubular heater depth energy-saving system, comprise: tubular heater, be arranged on two preheat burners of the import of tubular heater, this pair of preheat burner is connected with the port of export of fuel gas pipeline and air pipe line, be arranged on the fuel gas preheater of fuel gas line upstream and be arranged on the gas sweetening reactor of fuel gas pipe line downstream, being arranged on the air preheater on air pipe line.Compared with prior art, the scope of application of the present utility model is wide, and the cycle of operation is long, reliability and security high, construction investment province, for the energy-conservation of tubular heater provides a kind of improving method.
Description
Technical field
The utility model belongs to tubular heater field, especially relates to a kind of tubular heater depth energy-saving system.
Background technology
For a long time, the acid dew piont corrosion caused by sulfide in flue gas is serious, affects the long period safe operation of heating furnace of oil refining device equipment.In order to proterctive equipment, often need to improve the final exhaust temperature of flue gas, make the temperature of cold surface higher than dew-point temperature, thus prevent from or reduce condensation producing acid corrosion.Along with oil plant is more and more higher to energy-saving and cost-reducing requirement, flue gas acid dew point corrosion becomes the major obstacle reducing tube furnace exhaust gas temperature, the raising thermal efficiency, brings huge puzzlement to oil plant.Seek the method slowing down and prevent flue gas acid dew point from corroding, being not only the key subjects that oil plant heating furnace reduces equipment damage, is also the requirement improving thermal efficiency of heating furnace further.
In order to solve heating furnace and inscribe between heat exchanger cold end corrosion and dust stratification, to allow to reduce exhaust gas temperature, improve heater efficiency, the measure can taked in theory has: (1) strengthens the deep desulfuration process of fuel; (2) high efficient heat exchanging technology is adopted; (3) coordinate the relation of fume side exothermic coefficient and air side heat absorption coefficient, control tube wall temperature; (4) develop the corrosion resistance of coating wearability, heat-resisting acid resistance technology and steel, improve the performance of material.
Patent and the document of current related measure (2) (3) (4) have a lot, propose a lot of process and equipment.Because current oil plant tubular heater uses fuel gas (refinery gas, natural gas or liquefied petroleum gas) mostly, all contain a considerable amount of H
2s gas, but in actual production operation, fuel gas sulfur content detected value is usually 100 ~ 300 μ L/L, and sometimes even higher, cause exhaust gas temperature very high, the thermal efficiency is difficult to reach expected design level.Fundamentally, reduce and corrode the sulphur that must first remove in fuel or hydrogen sulfide, but substantially there is no technique or the equipment of fuel gas deep desulfuration in current published patent and document.But for the first point, strengthen the deep desulfuration process of fuel, not yet have document or patent report at present.
Utility model content
The purpose of this utility model be exactly in order to overcome above-mentioned prior art exist defect and a kind of new tubular heater depth energy-saving system is provided, newly-increased gas sweetening reactor, the sulfur content in fuel gas is made to be not more than 10 μ about L/L, thus the dew-point temperature of tubular heater flue gas and the exhaust gas temperature of tubular heater can be reduced, avoid the dew point corrosion of heat exchanger, can improve the combustion intensity of tubular heater, fuel saving gas, improves the thermal efficiency of tubular heater greatly simultaneously.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of tubular heater depth energy-saving system, comprising:
Tubular heater,
Be arranged on two preheat burners of the import of tubular heater, this pair of preheat burner is connected with the port of export of fuel gas pipeline and air pipe line,
Be arranged on the fuel gas preheater of fuel gas line upstream and be arranged on the gas sweetening reactor of fuel gas pipe line downstream,
Be arranged on the air preheater on air pipe line.
Fuel gas in fuel gas pipeline is preheated to 100-500 DEG C by described fuel gas preheater, then enters gas sweetening reactor.
Described fuel gas pipeline is connected with gas sweetening reactor after tubular heater auxiliary heating.
Described fuel gas pipeline can not also arrange fuel gas preheater.
The utility model is by being optimized improvement to current petrochemical industry tubular heater charging flow process, newly-increased gas sweetening reactor, the sulfur content in fuel gas is made to be not more than 10 μ L/L, reduce the exhaust gas temperature of heating furnace, the thermal efficiency of the whole heating furnace device of abundant guarantee, compared with prior art, have the following advantages:
(1) fuel gas is after deep desulfuration, SO in the flue gas after burning
3content is extremely low, and dew-point temperature reduces, and avoid the dew point corrosion of heat exchanger low-temperature zone heat transfer element, thus can reduce exhaust gas temperature further, the thermal efficiency of heating furnace entirety improves greatly;
(2) fuel gas mainly adopts high-temperature flue gas to carry out preheating, can adopt heating furnace auxiliary heating simultaneously, and technological process is perfect and simple;
(3) enter two preheat burner after fuel gas and air preheating simultaneously, combustion intensity is high, and capacity usage ratio is high, can save fuel.
(4) SO in flue gas after fuel gas deep desulfuration
3extremely low, NO after the two preheat burner of employing
xextremely low, environment protecting is good.
(5) the utility model flow process is simple, and investment cost is lower, can ensure overall flow equipment long-term operation.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present utility model in embodiment 1;
Schematic diagram of the present utility model in Fig. 2 position embodiment 2.
In figure, 1 is fuel gas pipeline, and 11 is fuel gas preheater, and 12 is gas sweetening reactor, and 2 is air pipe line, and 21 is air preheater, and 3 is two preheat burners, and 4 is tubular heater, and 5 is flue gas pipeline.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
Embodiment 1
A kind of tubular heater depth energy-saving system, its structure as shown in Figure 1, comprise: tubular heater 4, be arranged on two preheat burners 3 of the import of tubular heater 4, this pair of preheat burner 3 is connected with the port of export of fuel gas pipeline 1 and air pipe line 2, be arranged on the fuel gas preheater 11 of fuel gas pipeline 1 upstream and be arranged on the gas sweetening reactor 12 in fuel gas pipeline 1 downstream, being arranged on the air preheater 21 on air pipe line 2.
Utilize fuel gas preheater 11 that the fuel gas in fuel gas pipeline is preheated to 100 DEG C, then enter gas sweetening reactor 12, gas sweetening reactor 12 pairs of fuel gas carry out deep desulfuration to wherein sulfur content and are not more than 10 μ L/L.Air preheater is by the air preheat to 100 in air pipe line DEG C.Enter into two preheat burner 3 after fuel gas and air all heat, then burn in tubular heater 4.
Fuel gas is generally refinery gas, natural gas or liquefied petroleum gas, and wherein sulfur content is general all at 100 ~ 300 μ L/L, and temperature is generally normal temperature.First fuel gas enter into fuel gas preheater 11 through fuel gas pipeline 1, is preheating to 100 DEG C by high-temperature flue gas.Subsequently, fuel gas is through gas sweetening reactor 12, desulphurization reaction is there is in gas sweetening reactor 12, sulfur content in fuel gas is reduced to and is not more than 10 μ L/L, after reaction, fuel temperature degree is generally at 100 DEG C, now, fuel gas becomes super-low sulfur high-temperature fuel gas, and last super-low sulfur high-temperature fuel gas enters two preheat burner 3.
Air is combustion air, is generally normal temperature.First air enters into air preheater 21 through air pipe line 2, is preheating to 100 DEG C by high-temperature flue gas, and now air is high temperature air, and final high temperature air enters two preheat burner 3.
Super-low sulfur high-temperature fuel gas and high temperature air enter into tubular heater 4 by two preheat burner 3 and combustion reaction occur, because fuel gas and air are all high-temperature gases, violent burning is there is in tubular heater 4, calorific intensity is relatively high, heat-transfer effect is good, capacity usage ratio can be improved, fuel saving.
High-temperature flue gas after tubular heater 4 combustion enters the fume side of heat exchanger by flue gas pipeline 5.The temperature of high-temperature flue gas is generally at 300-400 DEG C, and because the sulfur content in high-temperature flue gas reduces, dew-point temperature is low, by heat exchanger, exhaust gas temperature can be fallen the end to being not more than 100 DEG C completely, the thermal efficiency of heating furnace is brought up to more than 94%.
During high-intensity combustion, the capacity usage ratio of fuel can improve 2%-10%, exhaust gas temperature reduces greatly simultaneously, under the prerequisite fully ensureing residual neat recovering system security reliability, reduce residual neat recovering system and once invest 5%-20%, the feature of environmental protection of whole technique strengthens further, and sulfureous in flue gas content is compared existing technique reduction 50%-95% and compared existing technique reduction 30%-80% with amount of nitrogen oxides.
Embodiment 2
A kind of tubular heater depth energy-saving system, its structure as shown in Figure 2, substantially identical with embodiment 1, difference is, because fuel gas does not still reach the reaction temperature needed for gas sweetening reactor 12 after fuel gas preheater 11 preheating, need through tubular heater 3 auxiliary heating to 500 DEG C, then enter gas sweetening reactor 12 and carry out deep desulfuration process.Therefore, after fuel gas pipeline 1 connects the outlet of fuel gas preheater 11, be connected with gas sweetening reactor after tubular heater 4 auxiliary heating.Air is combustion air, is generally normal temperature.First air enters into air preheater 21 through air pipe line 2, is preheating to 500 DEG C by high-temperature flue gas, and now air is high temperature air, and final high temperature air enters two preheat burner 3.
Embodiment 3
Tubular heater depth energy-saving system, its structure is substantially identical with embodiment 1, difference is, fuel gas pipeline does not arrange fuel gas preheater, fuel gas without preheating, directly with the laggard furnace fuel device of the operating mode desulfurization of about 40 DEG C, adopt conventional low nitrogen oxide burner, the catalyst of suitable increase gas sweetening inside reactor, extends desulfurization time, improves the efficiency of desulfurization reactor simultaneously.
Claims (3)
1. a tubular heater depth energy-saving system, is characterized in that, this system comprises:
Tubular heater,
Be arranged on two preheat burners of the import of tubular heater, this pair of preheat burner is connected with the port of export of fuel gas pipeline and air pipe line,
Be arranged on the fuel gas preheater of fuel gas line upstream and be arranged on the gas sweetening reactor of fuel gas pipe line downstream,
Be arranged on the air preheater on air pipe line.
2. a kind of tubular heater depth energy-saving system according to claim 1, is characterized in that, described fuel gas pipeline is connected with gas sweetening reactor after tubular heater auxiliary heating.
3. a kind of tubular heater depth energy-saving system according to claim 1, is characterized in that, described fuel gas pipeline can not also arrange fuel gas preheater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520100050.7U CN204593366U (en) | 2015-02-11 | 2015-02-11 | A kind of tubular heater depth energy-saving system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520100050.7U CN204593366U (en) | 2015-02-11 | 2015-02-11 | A kind of tubular heater depth energy-saving system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204593366U true CN204593366U (en) | 2015-08-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520100050.7U Active CN204593366U (en) | 2015-02-11 | 2015-02-11 | A kind of tubular heater depth energy-saving system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204593366U (en) |
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2015
- 2015-02-11 CN CN201520100050.7U patent/CN204593366U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| CB03 | Change of inventor or designer information |
Inventor after: Yan Guanghao Inventor after: Ma Lei Inventor after: Zhang Minghui Inventor before: Ma Lei Inventor before: Zhang Minghui |
|
| COR | Change of bibliographic data | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20161213 Address after: Zuchongzhi road Pudong Zhangjiang High Tech Park of Shanghai city Pudong New Area 201203 Lane 887, room 307 No. 83-84 Patentee after: The great industrial furnace Co., Ltd in Shanghai Patentee after: Shanghai Hoto Engineering Inc. Address before: Zuchongzhi road Pudong Zhangjiang High Tech Park of Shanghai city Pudong New Area 201203 Lane 887, room 307 No. 83-84 Patentee before: The great industrial furnace Co., Ltd in Shanghai |