CN203820726U - Furnace body for normal-pressure fixed-bed gas generation furnace - Google Patents

Abstract

The utility model provides a furnace body for a normal-pressure fixed-bed gas generation furnace. The furnace body mainly comprises a furnace body shell, a thermal insulation material, a furnace pipe and the like, wherein the furnace pipe is composed of an inner wall, a lower container, an upper container, a heat exchange tube bundle, a water inlet pipe and a steam outlet pipe; the cross section of the furnace pipe is of a square, and four angles of the square have certain radians; the heat exchange tube bundle is longitudinally welded on the outer surface of the inner wall of the furnace pipe, and the orifice of the heat exchange tube bundle is welded and communicated with the container welded on the outer surface of the inner wall of the furnace pipe; the cross section of the furnace body shell is circular; and the thermal insulation material is filled between the furnace pipe and the furnace body shell. The gasification area of the furnace body is large, so that the production capacity is improved; meanwhile, the self-produced steam pressure is high, and the wall temperature is increased, so that carbon residues in furnace slag can be favorably reduced, the gasifying agent decomposition rate can be favorably increased, and the production cost is reduced.

Description

A kind of immovable bed normal-pressure coal gas generating furnace body of heater

Affiliated field: the present invention provides a kind of body of heater for the immovable bed normal-pressure coal gas generating furnace in coal gas manufacturing.

Background technology: existing taking coal gas as unstripped gas or the enterprise of fuel gas produce the production method of coal gas, mainly taking the moulded coal after lump coal and coal powder formation as raw material, utilize immovable bed normal-pressure coal gas generating furnace to produce coal gas, existing immovable bed normal-pressure coal gas generating furnace is mainly by chassis, ash-pan, taper fire grate and forming with the body of heater of water jacket, be circular with its cross section of body of heater of water jacket, cross-sectional area is less than its external square, be unfavorable for the raising of throughput, this structure bearing capacity is poor simultaneously, operating pressure≤0.2MPa, water jacket outlet steam temperature≤130 DEG C, wall temperature is low, gasification layer temperature near water jacket inwall is low, cause vaporized chemical rate of decomposition low, coal is incomplete at cold zone combustion gasification, slag carbon residue is high, consume high, cost is high, the self-produced vapor pressure of water jacket is low in addition, temperature is low, grade is low.

Goal of the invention.The object of this invention is to provide that a kind of self-produced steam pressure is high, temperature is high, of high grade, be conducive to the reduction of slag carbon residue and the raising of vaporized chemical rate of decomposition simultaneously, be also conducive to the lifting of throughput and can supporting furnace bottom base be foursquare immovable bed normal-pressure coal gas generating furnace.

Summary of the invention: immovable bed normal-pressure coal gas generating furnace body of heater of the present invention, it is mainly by shell, lagging material and by inwall, lower header, upper collecting chamber, heat-exchanging tube bundle, water inlet pipe, the compositions such as the flue that steam outlet pipe forms, the cross section of inboard wall of furnace is square, its foursquare four angles are with radian, the radius R of radian equals the major radius F of the square elbow isometrical in collecting box pipe, heat-exchanging tube bundle is longitudinally welded on the outside surface of inboard wall of furnace, heat-exchanging tube bundle upper, lower nozzle respectively with upper on the outside surface of inboard wall of furnace along horizontal welding, lower header welding UNICOM, lower header taps into water pipe, upper collecting chamber connects steam outlet pipe, the cross section of body of heater shell is circular, fill insulant material between flue and body of heater shell, the object of the present invention is achieved like this, and first making cross section is foursquare inboard wall of furnace, and its foursquare four angles are with radian, and the radius R of radian equals the major radius F of the square elbow isometrical in collecting box pipe, the making of heat-exchanging tube bundle is that steel pipe is cut into two lobes vertically, then the cut surface of every lobe steel pipe is longitudinally attached on the outside surface of inboard wall of furnace along flue, then by good the gap soldering and sealing between every lobe steel pipe and the outside surface of inboard wall of furnace, the making of upper and lower header is that steel pipe is cut into two lobes vertically, then the cut surface of every lobe steel pipe is laterally attached to along flue on the outside surface of inboard wall of furnace, and be bent into the foursquare lasso of four angles with radian, its inner arc radius R of four jiaos equals the major radius F of the square elbow isometrical in collecting box pipe, respectively the upper and lower mouth of pipe that is welded on the heat-exchanging tube bundle on the outside surface of inboard wall of furnace is encapsulated in lasso with lasso again, then by good the gap soldering and sealing between lasso and the outside surface of inboard wall of furnace, then the water inlet pipe of burn-oning on lower header, the steam outlet pipe of burn-oning on upper collecting chamber, so far completes the making of flue, complete after above-mentioned work, flue is carried out to Hydrostatic test, this flue design pressure is 1.6Mpa, operating pressure is 1.3Mpa, after the water test completes, is circular shell at furnace gall periphery suit cross section, again flue and shell are welded with brace rod, and then by fill insulant material between flue and body of heater shell, this lagging material is foamed concrete, adopt integrated foam molding.

Invention advantage: the advantage the utlity model has is that self-produced steam pressure is high, temperature is high, of high grade, flue wall temperature is high, is conducive to the reduction of slag carbon residue and the raising of vaporized chemical rate of decomposition, and throughput is further promoted simultaneously.

Brief description of the drawings: the description of the drawings is as follows: figure mono-is the main sectional view A of equipment---A, and in figure, 1 is that inboard wall of furnace, 2 is that lower header, 3 is that lagging material, 4 is that body of heater shell, 5 is that heat-exchanging tube bundle, 6 is that bracing frame, 7 is that upper collecting chamber, 8 is that refractory brick, a1-3 are that water inlet pipe, b1-3 are steam outlet pipe; Figure bis-is vertical view B---B, and in figure, 1 is that inboard wall of furnace, 2 is that lower header, 5 is that heat-exchanging tube bundle, 6 is that bracing frame, a1-4 are water inlet pipe; Figure tri-is partial enlarged drawing 1---in 1, figure, 1 is that inboard wall of furnace, 2 is that lower header, 4 is that body of heater shell, 5 is that heat-exchanging tube bundle, 6 is bracing frame.

Embodiment: the utility model, in connection with accompanying drawing, thinks that the immovable bed normal-pressure coal gas generating furnace body of heater of certain synthesis ammonia plant design is embodiment, is described in further detail:

For its inboard wall of furnace cross section of immovable bed normal-pressure coal gas generating furnace body of heater of this factory's design is that burner hearth cross section is that 2800 × 2800mm, wall thickness are the high 2600mm of being of 20mm, flue, body of heater external diameter is that 4100mm, wall thickness are 10mm, the high 5600mm of being, flue inflow temperature is 80 DEG C, outlet vapor pressure is that 1.3Mpa, temperature are 190 DEG C, and single producer gas output is 9000NM ³/ h, body of heater operating pressure is 0.03Mpa, concrete data are as shown in the table.

One, list of nozzles

Two, technical characteristic

In addition, the outer cylinder body of this equipment, bracing frame are made of Q235-B steel; Flue is all made of No. 20 boiler steels.

Claims (2)

1. an immovable bed normal-pressure coal gas generating furnace body of heater, it is mainly by shell, lagging material and by inwall, lower header, upper collecting chamber, heat-exchanging tube bundle, water inlet pipe, the compositions such as the flue that steam outlet pipe forms, it is characterized in that: the cross section of inboard wall of furnace is square, its foursquare four angles are with radian, the radius R of radian equals the major radius F of the square elbow isometrical in collecting box pipe, heat-exchanging tube bundle is longitudinally welded on the outside surface of inboard wall of furnace, heat-exchanging tube bundle upper, lower nozzle respectively with upper on the outside surface of inboard wall of furnace along horizontal welding, lower header welding UNICOM, lower header taps into water pipe, upper collecting chamber connects steam outlet pipe, the cross section of body of heater shell is circular, fill insulant material between flue and body of heater shell.

2. a kind of immovable bed normal-pressure coal gas generating furnace body of heater according to claim 1, is characterized in that: the lagging material of filling between flue and body of heater shell is foamed concrete, adopts integrated foam molding.