US3421481A - Multi-stage vaporization steam generator - Google Patents

Multi-stage vaporization steam generator Download PDF

Info

Publication number
US3421481A
US3421481A US631296A US3421481DA US3421481A US 3421481 A US3421481 A US 3421481A US 631296 A US631296 A US 631296A US 3421481D A US3421481D A US 3421481DA US 3421481 A US3421481 A US 3421481A
Authority
US
United States
Prior art keywords
coil
pipe
burner
steam
chamber
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.)
Expired - Lifetime
Application number
US631296A
Other languages
English (en)
Inventor
Mario Carloni
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3421481A publication Critical patent/US3421481A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B21/00—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically
    • F22B21/22—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from water tubes of form other than straight or substantially straight

Definitions

  • the present invention relates to a steam generator, in which vaporization is divided into several successive stages, especially for the production of dry, saturated steam.
  • immediate vaporization steam generators are already known, operating according to the principle of water circulating in a coil struck by a burner flame or by combustion products. These generators have the inconvenience of very high operating costs, and of generating often unsufficiently dry saturated steam which contains a high percentage of finely subdivided water particles, a defect preventing their utilization in some industrial sectors.
  • the object of the present invention is to provide a steam generator avoiding the above-mentioned inconveniences, and capable of producing dry, saturated steam without suspended water particles, thus being suitable for all industrial fields, at very low operating costs.
  • Another object of the present invention is the provision of a steam generator ensuring good heat transmission between the combustion products and the water to be vaporized, with minimum losses from the thermal point of view, and particularly with suflicient elasticity of operation, in the sense that any unexpected increases in the steam demand may be easily met.
  • the steam generator which includes a boiler, a burner, a plurality of pipes within said boiler, a non-linear path between said pipes for the combustion products originating from said burner, a preheater occupying part of said boiler, water inlet and dry steam outlet pipes, and comprises at least one tendentially cylindrical outer element, a tendentially cylindrical inner element, said outer element and said inner element being not co-axial, but one inside the other, a plurality of annular cross walls between said elements, a plurality of expansion chambers between said elements, cross annular walls, a frontal coil remote with respect to said burner, a connection of said frontal coil to said water inlet pipe, hydraulic connections between each of said expansion chambers, a connection between the expansion chamber nearest to said frontal coil and said frontal coil itself, and a connection between the chamber closest to said burner and the dry steam outlet pipe.
  • FIG. 1 shows a longitudinal diagrammatic sectional view of a generator according to the invention
  • FIGS. 2 and 3 show cross sectional views according to lines lI-II and IIIIII respectively, of FIG. 1.
  • the generator comprises a boiler defined by walls 1.
  • Burner 2 is conventionally fixed to the boiler, irontally.
  • a cylinder 3 is arranged in axial prolongation to said burner.
  • This cylinder 3 is inside another cylinder 4, non-coaxial, that is, eccentric in cross-section compared with cylinder 3.
  • An annular chamber is thus formed between the walls of the two cylinders.
  • This chamber is subdivided into a number of expansion chambers, 5, and by a number of annular walls 6.
  • each of these chambers will define, in transverse section, an upper zone of greater section compared with the lower zone, of smaller section.
  • FIG. 7 indicates a water inlet pipe (FIG. 2) which enters the collector pipes 8, flowing from these pipes into the lower pipes 9 and from these into the upper pipes 10 of the preheater formed precisely of this nest of pipes, and situated close to the areas where the combustion products circulate, in the boiler.
  • these pipes are arranged in layers similar to jackets adjacent to the walls defining the boiler itself.
  • Pipe 11 and a pipe 12 branch off from the upper pipes 10.
  • Pipe 12 consists of a breather pipe for the preheater, while pipe 11 passes through the pump (not illustrated), and terminates at inlet 13 in the boiler, from which pipe 514 branches off in the direction of the burner inside cylinder 4.
  • pipe 14 starts to form a cylindrical spiral coil 15 inside cylinder 4, forming a kind of protective screen with regard to the flame and to the combustion products coming from the burner.
  • the space within the turns of the coil 15 in turn, forms the flue for said flame, as well as a first portion of the path travelled by said combustion products.
  • coil 15 continues with a pipe 16 which joins to the centre of a frontal plane coil 17.
  • the other peripheral end 18 of the coil has a curved course and is connected to the inlet of the expansion chamber 5 which is further away from the burner. The end reaches a lower point of this chamber, according to a direction close to the tangential one (directed downwards) with respect to the outer cylinder 4.
  • pipe 19 branches olf and extends to form in an upper part of the boiler a series of curves which form an irregular coil 20, best visible in FIG. 3.
  • This coil provides a free passage for the combustion products and, in any case, extends downwards with a pipe 18a which, like pipe 18, reaches, with an almost tangential direction, inclined downwards, a lower point of the second expansion chamber 5.
  • pipe 19 branches which forms another irregular coil 20a, and so on, in relation to the second, third, and fourth expansion chamber 5.
  • arrows F1, F2, F3, F4, F5, F6, F7, F8 and F9 indicate the path of the combustion products (flame, smoke, hot air).
  • the steam generator operates as follows:
  • a steam generator including a boiler, a burner, a
  • each of the said chambers comprises a pipe branching from the larger section upper part of the chamber, an irregular coil connected to said pipe, a descending pipe connected to said irregular coil and also to a low point of a chamber successive to said expansion chamber, said descending duct having in correspondence to said lower point a substantially tangential direction compared with the circular boundaries of said successive chamber.
  • a steam generator comprising at the inside of the inner cylindrical wall, a coil of cylindrical turns, said means connecting said frontal coil to said preheater including said coil of cylindrical turns being connected to the preheater at the burner end of the inner element and connected to the frontal coil at the end of the inner element remote from the burner.
  • a steam generator characterized by the fact that said preheater comprises a number of pipes in hydraulic communication with one another, situated externally to said boiler, and a course for the combustion products defined by walls leading said combustion products through at least part of said numerous pipes, the water inlet pipe being directly connected to a point which forms one end of said numerous pipes, while the other end is connected to a pipe which, through a pump, connects with the frontal coil connecting means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
US631296A 1966-04-19 1967-04-17 Multi-stage vaporization steam generator Expired - Lifetime US3421481A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT14366 1966-04-19

Publications (1)

Publication Number Publication Date
US3421481A true US3421481A (en) 1969-01-14

Family

ID=11097874

Family Applications (1)

Application Number Title Priority Date Filing Date
US631296A Expired - Lifetime US3421481A (en) 1966-04-19 1967-04-17 Multi-stage vaporization steam generator

Country Status (4)

Country Link
US (1) US3421481A (ref)
BE (1) BE697172A (ref)
DE (1) DE1526908A1 (ref)
ES (1) ES340194A1 (ref)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1070529A (en) * 1909-04-22 1913-08-19 Theodore J Radke Water-heater.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1070529A (en) * 1909-04-22 1913-08-19 Theodore J Radke Water-heater.

Also Published As

Publication number Publication date
ES340194A1 (es) 1968-09-01
DE1526908A1 (de) 1970-09-17
BE697172A (ref) 1967-10-02

Similar Documents

Publication Publication Date Title
US2867416A (en) Tubular combustion chamber lining for forced flow steam generators
US3509867A (en) Radiant and convective heater
US2383924A (en) Heater
US3051146A (en) Water tube boiler or steam generator
US3192906A (en) Boilers for reducing temperature gradient and improving water circulation
US3421481A (en) Multi-stage vaporization steam generator
US3642061A (en) Heat exchanger
US3368531A (en) Vapor generator
US2183893A (en) Fluid heater
US3301224A (en) Steam generator organization
CN105473939B (zh) 具有双道锅炉设计的连续流动蒸汽发生器
JP2002535588A (ja) 化石燃料ボイラ
EP4246052A1 (en) Cogeneration boiler
US1618735A (en) Water heater
US2367870A (en) Steam boiler
US3386420A (en) Atmospheric fired boiler
US3266466A (en) Vapor generator and furnace wall therefor
US1971068A (en) Boiler
US3382848A (en) Boilers
US2455201A (en) Furnace baffle
US3153402A (en) Steam generator
US1577549A (en) Boiler
US2105863A (en) Steam baking oven
US790378A (en) Flash steam-generator.
US1651613A (en) Boiler for hot-water heating plants