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Classifications

• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
  • C10B27/00—Arrangements for withdrawal of the distillation gases
• • 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

Definitions

• This invention relates to the recovery of heat from industrial gases and particularly to a method of supplying the steam required in the operation of water gas sets in an economical manner by utilizing waste heat which is normally discharged with the stack gases.
• the steam which is supplied during the make is derived ordinarily from boilers which are operated for that purpose, or it may be exhauststeam from other sources. sary to provide boilers and to operate them at considerable expense, in order that the required amount of steam may be available.
• waste heat boilers through which the stack gases are conducted during the blow period.
• waste heat boilers are expensive to install and to maintain.
• a flash boiler has been suggested in which water is sprayed upon surfaces previously heated by contact with the hot stack gases.
• the flash boiler is, however, subject to the objection that the water which is sprayed therein takes up an excessive amount of heat, so that the steam is raised to a high temperature before it leaves the boiler.
• the additional heat over and above that necessary to vaporize the water is carried away with the steam, and it is impossible to restore the heat at a sufficient rate to maintain the temperature necessary for water vaporization. Consequently the boiler ceases to operate after a few successive sive runs and is no longer effective as a source of steam for operation of the plant.
• the invention affords a simple and effective solution of the problem of providing steam for water gas sets and renders unnecessary the provision of auxiliary boilers.
• the water thus initially heated is delivered during the proper interval to the flash boiler, and being already heated it is readily converted into steam which returns to the heat transformer as hereinbefore described.
• the steam in. the transformer after giving up its excess heat to the water and being augmented by steam which is formed in the transformer, is delivered to the base of the generator and utilized in the manufacture of water gas.
• the operation as described permits the production of steam in a sufficiently continuous manner and in suflicient volume to supply the generator.
• the invention affords a saving in cost of installing and maintaining boilers and the cost of fuel used therein, and utilizes also heat which otherwise would become a total loss in the process.
• 5 indicates the water gas generator, 6 the carburetor, and '7 the superheater of a water gas set. It is to be understood that suitable provision is made for the introduc- 5 tion of carbonaceous fuel, as for example through charging hole 41, to the generator and for the introduction of carburetting material to the carburetor.
• the carburetting material may be introduced through oil inlet 42.
• the ap- 110 paratus is equipped to permit the introduction of the necessary air to the generator.
• the boiler is provided with a plurality of heat absorbing surfaces 11, preferably of refractory material, so disposed as to permit the circulation of the-gas thereabout and the absorption of heat therefrom.
• the gas escapes from the top of the boiler through an outlet which may be closed by a cover 12,.
• the boiler ' may be provided with an opening at its bottom, normally. closed by a cover 13, to permit the withdrawal of accumulations of finely di-.
• the. water gas produced in the generator by the reaction of steam on the fuel bed is passed into the carburetor, where it is enriched with oil or other enriching medium introduced through 42.
• the carburetted water gas thus produced is passed through the carburetor and superheater 7 into washbox 44. During adownrun water gas.
• water gas produced-in the generator by the reaction of steam on the hot vfuel bed is withdrawn through pipe 45, which leads into the washbox 44.
• the gas may pass to a holder'or suitable gas purification appa-- Simultaneously with the passage of steam'through the fuel bed, wateris introduced through a pipe 14 and'directed by spray nozzles 15 onto the heated surfaces within the boiler.
• the steam is withdrawn through a pipe 16 and'is delivered thereby to a distributor 17 having openings 18 in the bottom thereof.
• the distributor may be generally cylindrical, in form and is disposed within a heat transformer l9 also of cylindrical form and constructed with sufficient strength to resist the pressure of the steam developed.
• the openings in the distributor 17 are disposed beneath the level of the water which is maintained in the transformer, the level being kept constant by means of a valve 20 controlled by a float 21, the valve beingv disposed in 5 temperature of the water in the heat transformer is raised, and the heat carried from the boiler is thus conserved.
• the steam from the heat transformer is delivered through a pipe 24 to the generator 5 and is utilized therein forthe purpose of the operation.
• the water which is heated in the heat transformer 19 may be delivered through a pipe-25 and strainer 26 to a circulating pump 27 which returns it through a pipe 28 to the pipe 14. Additional water may be'supplied to'the pipe "which is carried away with the steam is promptly returned to the boiler in the preheated water.
• blow gas is delivered from the superheater 7 through a pipe 9 to a flash boiler 10 which may be generally cylindrical in form and constructed"
• the operation of the apparatus as hereinbefore described does not interfere with the normal operation of the water gas set, which follows the usual cycle including the air blow period during which the gases are delivered to the flash boiler for the purpose of heating the contact surfaces are diverted from the flash boiler and water is introduced thereto for the purpose of producing steam.
• the method and apparatus as described afford a simple and economical arrangement whereby the steam required for the operation of the water gas set may be produced solely by the utilization of waste heat therefrom. It is adapted to plants of any size, but is particularly useful in connection with small plants or plants which are operated for only a portion of the time, because .it avoids the necessity. for the construction and maintenance of aseparate boiler plant for the production of steam.
• a flash boiler including a surface adaptedto absorb heat from the gases, means for delivering the gases to the boiler and for supplying water thereto, means for maintaining a body of water, means for delivering. 1 steam produced in the boiler beneath the surface of the water'whereby surplus heat carried by the steam is conserved, and means for recirculating water which is not converted into steam by initial contact with the heated surface;
• a flash boiler including a surface adapted to absorb heat from the gases, means for delivering the gases to the boiler and for supplying water thereto, means for maintaining a body of water, means for delivering steam produced in the boiler beneath the surface of the water whereby surplus heat carried by the steam is conserved, and means for delivering water from the said body to the boiler.
• a water gas generator means to supply air to a body of fuel maintained therein, a flash boiler including a surface adapted to absorb heat, means for delivering gases from the generator to the boiler, means for supplying water to the boiler, means for maintaining a body of water, means for delivering steam produced in the boiler beneath the surface of the water whereby surplus heat carried by the steam is conserved and means for conveying the steam to the generator.
• a generator means to supply air to a body of fuel maintained therein, a flash boiler including a surface adapted to absorb heat, means for delivering gases from the generator to the boiler, means for supplying water to the boiler, means for maintaining a body of water, means for delivering steam produced in the boiler beneath the surface of the water whereby surplus heat carried by the steam is conserved, means for conveying the steam to the generator, and means for recirculating water which is not converted into steam by initial contact with the heated surface.
• a generator means to supply air to a body of fuel maintained therein, a flash boiler including a surface adapted to absorb heat, means for delivering gases from the generator to the boiler, means for supplying water to the boiler, means for maintaining a body of water, means for delivering steam produced in the boiler beneath the surface of the water whereby surplus heat carried by the steam is conserved, means for conveying the steam to the generator, and means for delivering water from said body to the boiler.
• a carburetted water gas set comprising a generator, a carburetor and a superheater connected in series and operating with alternate air blasting and water gas making periods, a flash boiler including a surface adapted to absorb heat from the blast gases formed in the generator during the air blasting period, means for passing blast gases from the generator through the flash boiler, means for supplying water to the flash boiler during the water gas making periods, means for maintaining a body of water, means for delivering steam produced in the flash boiler beneath the surface of the body of water whereby surplus heat carried by the steam is conserved, means for conveying the steam to the generator during the water gas making periods, and means for delivering water from said body of Water to the flash boiler.

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Materials Engineering (AREA)
• Organic Chemistry (AREA)
• Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Description

Priority Applications (1)

Applications Claiming Priority (1)

Publications (1)

Family

ID=23244834

Family Applications (1)

Country Status (1)

• 1928
  • 1928-11-17 US US320089A patent/US1967013A/en not_active Expired - Lifetime

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