JPH11263606A - Sulfuric acid producing equipment - Google Patents

Sulfuric acid producing equipment

Info

Publication number
JPH11263606A
JPH11263606A JP6322698A JP6322698A JPH11263606A JP H11263606 A JPH11263606 A JP H11263606A JP 6322698 A JP6322698 A JP 6322698A JP 6322698 A JP6322698 A JP 6322698A JP H11263606 A JPH11263606 A JP H11263606A
Authority
JP
Japan
Prior art keywords
gas
sulfuric acid
combustion furnace
combustion
air
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
Application number
JP6322698A
Other languages
Japanese (ja)
Inventor
Shoichi Kamenosono
正一 亀之園
Original Assignee
Ishikawajima Harima Heavy Ind Co Ltd
石川島播磨重工業株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ishikawajima Harima Heavy Ind Co Ltd, 石川島播磨重工業株式会社 filed Critical Ishikawajima Harima Heavy Ind Co Ltd
Priority to JP6322698A priority Critical patent/JPH11263606A/en
Publication of JPH11263606A publication Critical patent/JPH11263606A/en
Pending legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To provide a sulfuric acid producing equipment capable of efficiently recovering the kinetic energy and heat energy of SO2 gas from a combustion furnace. SOLUTION: Molten sulfur 2 (elemental sulfur) is burned in a combustion furnace 3 to form SO2 gas 6, the SO2 gas 6 is oxidized to SO3 gas 9, and the SO3 gas 9 is absorbed in dil. sulfuric acid 12 to form concd. sulfuric acid 13 by this sulfuric acid producing equipment. A compressor 21 for compressing the atmosphere as a means for boosting the combustion supporting gas necessary for the combustion is connected to the combustion furnace 3, and a gas-turbine generator 19 driven with the SO2 gas 6 from the combustion furnace 3 as the power source is furnished.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a sulfuric acid production facility.

[0002]

2. Description of the Related Art FIG. 3 shows an example of a conventional sulfuric acid production facility, in which molten sulfur 2 stored in a sulfur dissolving tank 1 is removed.
(Combustion air) from the blower 4 in the combustion furnace 3
Generate SO 2 gas 6 by mixing to be burned and, after the SO 2 gas 6 to recover the exhaust heat through waste heat boiler 7, the SO 2 gas 6 by the action of a catalyst such as platinum in the converter 8 It is oxidized and converted into SO 3 gas 9, and the reaction heat generated at that time is recovered by a heat exchanger 10 A, and the heat is further recovered by a heat exchanger 10 B arranged as a cooler on the outlet side of the converter 8 to adjust the temperature. Then, the SO 3 gas 9 whose temperature has been adjusted is absorbed in diluted sulfuric acid 12 in an absorption tower 11 to generate concentrated sulfuric acid 13, and a part of the concentrated sulfuric acid 13 generated here is diluted with dilution water 14.
The diluted sulfuric acid is added to dilute sulfuric acid 12 so as to be circulated and used in the absorption tower 11.

[0003] Further, a waste heat boiler 7 and a heat exchanger 10A,
In 10B, the supplied water 15 is converted into steam 16 by the recovered heat.
The steam 16 is effectively used in the facility. For example, the steam 16 having a high pressure is guided to a steam turbine generator to be used for power generation.

Further, the exhaust gas 18 from the absorption tower 11 is
After being processed by a gas processing facility (not shown), it is released to the atmosphere.

The reaction in the combustion furnace 3 is as follows:

S + O 2 → SO 2 , and the reaction in the converter 8 is

2SO 2 + O 2 → 2SO 3 , and the reaction in the absorption tower 11 is as follows:

## EQU3 ## SO 3 + H 2 O → H 2 SO 4

[0006]

However, in the above-mentioned conventional sulfuric acid production facility, the exhaust heat and reaction heat of the SO 2 gas 6 and SO 3 gas 9 are recovered by the exhaust heat boiler 7 and the heat exchangers 10A and 10B. However, in reality, the kinetic energy and the heat energy potentially contained in the SO 2 gas 6 before the heat recovery sent from the combustion furnace 3 are not efficiently recovered.

That is, the combustion air 5 supplied to the combustion furnace 3 as a supporting gas required for combustion does not need to be specially pressurized simply to generate SO 2 gas as a process gas for sulfuric acid production. In the combustion of the molten sulfur 2 by the combustion air 5 having a low pressure, the blower 4 merely guides the supply pressure to the combustion furnace 3 at a feed pressure slightly higher than the atmospheric pressure. Since it is not possible to generate SO 2 gas 6 having a pressure high enough to drive a generator or the like without hindrance, a technique for specifically recovering kinetic energy and heat energy of SO 2 gas 6 from combustion furnace 3 is not described. However, the design concept of recovering such kinetic energy and thermal energy was completely lacking.

The present invention has been made in view of the above circumstances, and has as its object to provide a sulfuric acid production facility capable of efficiently recovering kinetic energy and thermal energy of SO 2 gas from a combustion furnace.

[0009]

Means for Solving the Problems The present invention generates the SO 2 gas by burning the elemental sulfur in the combustion furnace, and converted to SO 3 gas to oxidize the SO 2 gas, a rare the SO 3 gas In a sulfuric acid production facility that generates concentrated sulfuric acid by absorbing it with sulfuric acid, the combustion furnace is connected to a pressurizing and feeding means that pressurizes and guides a supporting gas required for combustion, and the SO 2 gas from the combustion furnace is used as a power source. And a gas turbine generator that is driven as.

[0010] With this configuration, in the combustion furnace, the elemental sulfur is burned by the supportive gas which is pressurized and guided from the pressurized feeding means, and SO 2 gas having a high pressure is generated in the combustion furnace. Therefore, when this high-pressure SO 2 gas is guided from the combustion furnace to the gas turbine generator, the gas turbine generator is driven without hindrance and power is efficiently generated, and SO 2 gas is generated.
The kinetic energy and heat energy of the two gases are efficiently recovered as electric power.

Further, in the present invention, the pressurizing and feeding means can be constituted by a compressor that compresses the atmosphere and guides the compressed air to the combustion furnace. In this case, the conventional blower is replaced with a compressor. With a simple equipment change, compressed air compressed to several times the atmospheric pressure is sent as a supporting gas to the combustion furnace, and high-pressure SO 2 gas is generated inside the combustion furnace to generate gas turbine power. The machine can be driven without hindrance.

The pressurizing and feeding means includes an air fractionating device that fractionates components other than oxygen from liquid air obtained by liquefying the atmosphere to produce liquid oxygen, and a pressure boosting device that guides liquid oxygen from the air fractionating device to increase the pressure. Pump, and a vaporizer that vaporizes the liquid oxygen from the pump and guides it to the combustion furnace.If the liquid oxygen generated by the air fractionator is pressurized in the liquid phase by the pump, Finally, it is possible to easily increase the pressure of pure oxygen vaporized by the vaporizer and sent to the combustion furnace to several times the atmospheric pressure, and furthermore, pure oxygen is used as a supporting gas required for combustion in the combustion furnace. Therefore, it is necessary to consider a flow volume of an air component (mainly nitrogen) other than oxygen unnecessary for generation of SO 2 gas as compared with a case where combustion air is conventionally used. And the construction of sulfuric acid production facilities It becomes possible to shrink without reducing the productivity of the volume of the various equipment and piping systems.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of an embodiment of the present invention, and portions denoted by the same reference numerals as those in FIG. 3 represent the same components.

In the sulfuric acid production facility of this embodiment, a gas turbine generator 19 driven by the SO 2 gas 6 as a power source is provided upstream of the waste heat boiler 7 between the combustion furnace 3 and the converter 8. The gas turbine generator 19
A compressor 21 for compressing and sending the atmosphere is provided on the same axis as the turbine 20 of the above, and instead of the blower 4 which supplies the combustion air 5 to the combustion furnace 3 in the conventional equipment of FIG. The compressor 21 is connected to the combustion furnace 3 as a pressurizing and feeding means for pressurizing and guiding the supporting gas required for combustion.

If such a configuration is adopted, compressed air 22 several times higher than the atmospheric pressure is supplied to the combustion furnace 3 by the compressor 21 as a combustion supporting gas. Sulfur is burned and SO 2 having a high pressure in the combustion furnace 3
Since two gases 6 are generated, this high-pressure SO 2 gas 6
Is guided from the combustion furnace 3 to the gas turbine generator 19, the gas turbine generator 19 is driven without hindrance to efficiently generate power, and the kinetic energy and heat energy of the SO 2 gas 6 are efficiently recovered as electric power. Will be done.

In this embodiment, the compressor 21 which compresses the atmosphere and guides the compressed air to the combustion furnace 3 is provided coaxially with the turbine 20 of the gas turbine generator 19. If the turbine generator 19 is driven, the compressor 21 is driven together with the gas turbine generator 19 using the SO 2 gas 6 as a power source thereafter.

Therefore, according to the above embodiment, the gas turbine generator 19 is driven by the high pressure SO 2 gas 6 generated in the combustion furnace 3 without any trouble, and the kinetic energy of the SO 2 gas 6 from the combustion furnace 3 is increased. Since heat and heat energy can be efficiently recovered as electric power, the production cost can be reduced by using this electric power in the facility, and the concentrated sulfuric acid 13 can be produced at low cost.

In this embodiment, in particular, a simple equipment change in which the conventional blower 4 (see FIG. 3) is replaced with a compressor 21 arranged coaxially with the turbine 20 of the gas turbine generator 19, and the atmospheric pressure is reduced. Is supplied to the combustion furnace 3 as a supporting gas, and the compressed air
Since the gas turbine generator 19 can be driven without any trouble by generating the SO 2 gas 6 having a high pressure inside, it can be implemented inexpensively without increasing the equipment cost.

FIG. 2 shows another embodiment of the present invention.
As a pressurized supply means for pressurizing and introducing a supporting gas required for combustion to the combustion furnace 3, a component having a boiling point higher than oxygen such as nitrogen, such as nitrogen, is cooled from a liquid air which is cooled to a critical temperature or lower and simultaneously pressurized and liquefied. An air fractionation device 24 that fractionates to produce liquid oxygen 23, a pump 25 that guides liquid oxygen 23 from the air fractionation device 24 and pressurizes the liquid oxygen 23, and discharges the liquid oxygen 23 supplied by the pump 25 to a facility. A vaporizer 26 for vaporizing using heat or the like.

In such a sulfuric acid production facility, if the pressure of the liquid oxygen 23 generated by the air fractionator 24 in the liquid state is increased by the pump 25, the vaporizer 26
It is possible to easily increase the pressure of the pure oxygen 27 vaporized in the combustion furnace 3 and sent to the combustion furnace 3 to about several times the atmospheric pressure.
Pure oxygen 27 is used as a supporting gas required for combustion in the combustion furnace 3.
Is used, so that the combustion air 5
It is no longer necessary to consider the flow volume of air components (mainly nitrogen) other than oxygen unnecessary for the generation of SO 2 gas 6 as compared with the case where sulfur is used, and various devices and piping constituting the sulfuric acid production facility It is possible to reduce the volume of the system without reducing productivity.

The sulfuric acid production equipment of the present invention is not limited to the above-described embodiment, but has been described in the case where molten sulfur is introduced into a combustion furnace for combustion. It is needless to say that combustion may be performed as it is, and that various changes may be made without departing from the spirit of the present invention.

[0023]

According to the above-mentioned sulfuric acid production equipment of the present invention, the following various excellent effects can be obtained.

(I) According to the first aspect of the present invention, the gas turbine generator is driven without any trouble by the high-pressure SO 2 gas generated in the combustion furnace, and the S
Since the kinetic energy and heat energy of O 2 gas can be efficiently recovered as electric power, the production cost can be reduced by using this electric power in the facility,
Concentrated sulfuric acid can be produced at low cost.

(II) According to the invention described in claim 2 of the present invention, compressed air compressed to about several times the atmospheric pressure is supported by a simple equipment change by simply changing the conventional blower to a compressor. Since the gas can be sent to the combustion furnace as flammable gas and high-pressure SO 2 gas can be generated in the combustion furnace to drive the gas turbine generator without any trouble, the cost can be reduced without increasing equipment costs. be able to.

(III) According to the third aspect of the present invention, the liquid oxygen generated by the air fractionating apparatus is pressurized in a liquid phase by a pump, and finally vaporized by a vaporizer. The pressure of pure oxygen sent to the combustion furnace can be easily increased to about several times the atmospheric pressure. In addition, by using pure oxygen as a supporting gas required for combustion in the combustion furnace, combustion can be performed as in the past. In comparison with the case where air for use is used, there is no need to consider the flow volume of air components other than oxygen (mainly nitrogen) that are not necessary for the generation of SO 2 gas, and various devices constituting sulfuric acid production equipment and The volume of the piping system can be reduced without reducing productivity.

[Brief description of the drawings]

FIG. 1 is a system diagram showing an example of an embodiment for implementing the present invention.

FIG. 2 is a system diagram showing another embodiment of the present invention.

FIG. 3 is a system diagram showing a conventional example.

[Explanation of symbols]

2 Molten sulfur (single sulfur) 3 Combustion furnace 6 SO 2 gas 9 SO 3 gas 12 Dilute sulfuric acid 13 Concentrated sulfuric acid 19 Gas turbine generator 21 Compressor (pressurized feeding means) 22 Compressed air (combustible gas) 23 Liquid oxygen Reference Signs List 24 Air fractionation device (Pressure supply means) 25 Pump (Pressure supply means) 26 Vaporizer (Pressure supply means) 27 Pure oxygen (combustible gas)

Claims (3)

[Claims]
1. A elemental sulfur was burned in the combustion furnace to generate SO 2 gas, and converted to SO 3 gas to oxidize the SO 2 gas,
In a sulfuric acid production facility for producing concentrated sulfuric acid by absorbing the SO 3 gas into dilute sulfuric acid, a pressurizing and feeding means is connected to the combustion furnace to pressurize and guide the supporting gas required for combustion, and A sulfuric acid production facility provided with a gas turbine generator driven by using SO 2 gas as a power source.
2. The pressurizing and feeding means is constituted by a compressor that compresses air and guides the compressed air to a combustion furnace.
2. A sulfuric acid production facility according to item 1.
3. A pressurizing and feeding means, comprising: an air fractionating device that fractionates components other than oxygen from liquid air obtained by liquefying the atmosphere to produce liquid oxygen; 2. The sulfuric acid production equipment according to claim 1, wherein the sulfuric acid production equipment comprises:
JP6322698A 1998-03-13 1998-03-13 Sulfuric acid producing equipment Pending JPH11263606A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6322698A JPH11263606A (en) 1998-03-13 1998-03-13 Sulfuric acid producing equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6322698A JPH11263606A (en) 1998-03-13 1998-03-13 Sulfuric acid producing equipment

Publications (1)

Publication Number Publication Date
JPH11263606A true JPH11263606A (en) 1999-09-28

Family

ID=13223094

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6322698A Pending JPH11263606A (en) 1998-03-13 1998-03-13 Sulfuric acid producing equipment

Country Status (1)

Country Link
JP (1) JPH11263606A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1329289C (en) * 2005-10-13 2007-08-01 中国石油化工集团公司 Method for preparing sulfuric acid by using sulfur from gas turbine
WO2008034229A1 (en) * 2006-09-19 2008-03-27 Bogdan Wojak Gas turbine topping in sulfuric acid manufacture
EP2042470A3 (en) * 2007-09-25 2010-01-27 Bodgan Wojak Gas turbine topping device in a sytem for manufacturing sulfuric acid and method of using turbine to recover energy in manufacture of sulphuric acid
CN103318850A (en) * 2013-07-17 2013-09-25 上海奥格利环保工程有限公司 Low-temperature waste heat recovery system for pyrite and metallurgical off-gas acid making device
CN103848403A (en) * 2013-04-11 2014-06-11 襄阳泽东化工集团有限公司 Medium-low-grade heat energy recycling system and method in acid production by using iron pyrite

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1329289C (en) * 2005-10-13 2007-08-01 中国石油化工集团公司 Method for preparing sulfuric acid by using sulfur from gas turbine
WO2008034229A1 (en) * 2006-09-19 2008-03-27 Bogdan Wojak Gas turbine topping in sulfuric acid manufacture
EP2069233A1 (en) * 2006-09-19 2009-06-17 Bogdan Wojak Gas turbine topping in sulfuric acid manufacture
EP2069233A4 (en) * 2006-09-19 2010-01-06 Bogdan Wojak Gas turbine topping in sulfuric acid manufacture
EP2042470A3 (en) * 2007-09-25 2010-01-27 Bodgan Wojak Gas turbine topping device in a sytem for manufacturing sulfuric acid and method of using turbine to recover energy in manufacture of sulphuric acid
CN103848403A (en) * 2013-04-11 2014-06-11 襄阳泽东化工集团有限公司 Medium-low-grade heat energy recycling system and method in acid production by using iron pyrite
CN103848403B (en) * 2013-04-11 2015-08-05 襄阳泽东化工集团有限公司 A kind of pyrite-based sulfuric acid production produce in, recovery system of low-grade heat energy and method
CN103318850A (en) * 2013-07-17 2013-09-25 上海奥格利环保工程有限公司 Low-temperature waste heat recovery system for pyrite and metallurgical off-gas acid making device

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