CN201059534Y

CN201059534Y - Boiler for chemical industry producing

Info

Publication number: CN201059534Y
Application number: CNU2006201679720U
Authority: CN
Inventors: 朱宗林
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-11-16
Filing date: 2006-11-16
Publication date: 2008-05-14
Anticipated expiration: 2016-11-16

Abstract

The utility model belongs to a boiler for chemical production, which mainly uses waste gas and waste residue to generate steam. The boiler integrates the advantages and characteristics of a fluidized bed boiler, a boiling bed boiler and an gas production blowing-air after-heat boiler of synthetic ammonia and methanol, and overcomes the defects existing in the boilers. Now a brief explanation is provided combining an attached figure, which is that: a vertical sectional view of the boiler for chemical production comprises a boiler wall [15], an upper boiler drum [1], a lower boiler drum [6], a front water wall tube [10], left and right water wall tubes [18], a coal feeder [9], convection pipes [12],[4], a superheater [2], an economizer [5] and an air preheater [7]. The utility model is characterized in that; walls of a first fluidized bed [8] and a second fluidized bed [14] are provided with nozzles [11] of gas production blowing air and synthetic relief gas. Compared with the prior art, the utility model reduces the investment cost by three fourths, saves coal by saving 60 percent of consumption based on the original consumption, and has good economic benefit and social benefit.

Description

The boiler that a kind of Chemical Manufacture is used

One, affiliated technical field

The utility model belongs to the boiler that a kind of Chemical Manufacture is used, and mainly is to utilize waste gas, waste residues such as the tail gas waste gas of production water-gas process waste gas, synthetic ammonia and gas-making cinder, offal to produce water vapour.

Two, background technology

Before the utility model is made, chemical industry producers such as general synthetic ammonia, methyl alcohol, most process blowing-out gas waste gas of producing water-gas does not utilize.Producing water vapour produces by fire coal, but also there are indivedual producers to adopt the patented technology of ZL01215849.6, though but this technology can be utilized waste gas, waste residue in synthetic ammonia and the methyl alcohol, but there is a very big shortcoming in it: complex structure, investment are expensive, and to idle can't the utilization of coal-burning boiler of original synthetic ammonia and methanol production configuration.Need to arrange in addition new building site, increase exhaust boiler and other settings again, increase the enterprise investment expense, thereby increase cost.

Three, summary of the invention

The purpose of this utility model provides the boiler that a kind of Chemical Manufacture is used.It is made up of following mode: 1, furnace wall; 2, in furnace wall, be provided with upper drum and lower drum; 3, in burner hearth the front with about face water screen tube (abbreviating preceding water screen tube as, left and right sides water screen tube) is set, and steam superheater is set in the fume high-temperature district, be provided with economizer and air preheater at the flue gas afterbody; It is characterized in that having additional on the furnace wall in the first fluidized bed front in burner hearth and burn producing gas blower and synthetic burner noz(zle) of speeding to exit, its purpose utilizes feeder to send into the heat of high temperature burning things which may cause a fire disaster that coal in the first fluidized bed and gas-making cinder are produced under hot air acting, play ignition action for entering first fluidized bed producing gas blower when this boiler internal combustion with the synthetic venting of speeding, make producing gas blower and the synthetic well burning of speeding to exit, can avoid confined explosion, put the possibility of " big gun ".On the side walls on second fluid bed, have additional and burn partly producing gas blower and the synthetic burner noz(zle) of exitting of speeding.Mainly be the thermal source that utilizes the first fluidized bed, when the producing gas blower and the discharge quantity of speeding are excessive, alleviate the pressure and the load of the first fluidized bed.And make burning more abundant, efficient is better.This utility model is compared with existing other advanced technologies, and it is combined into one the combustion chamber and the boiler of original producing gas blower dexterously.Solved original burning producing gas blower and the defective of speeding to exit and setting up huge combustion chamber and boiler to combine separately, and can form by original old boiler transformation by two specific installations.Therefore, reduced hot loss, improved boiler thermal output, can on original basis, reduce investment outlay 3/4ths, reduced consuming 60%, so its economic benefit and social benefit are all very remarkable.

Four, description of drawings

Now be further described in conjunction with the accompanying drawings:

Accompanying drawing 1 is a longitudinal sectional view of the present utility model, and accompanying drawing 2 is partial lateral cutaway views of the present utility model.

With reference to accompanying drawing 1,2, shell [15] is a stove that consists of with brick and refractory material Wall is provided with water screen tube [10] in the wall front, be provided with water screen tube about wall [18], ceiling pipe [17]. In stove, be provided with two fluid beds [8] and [14], first Bed [8] is provided with air distribution plate, by feeder [9] slag has been mixed coal and has delivered to first [8] burning in reaches and is open at furnace wall blowing up general mood and the venting spray of speeding after the uniform temperature Mouth [11] allows the combustibles gas combustion. This nozzle has flameholding, is difficult for putting out Fire, Load Regulation is convenient, the efficient high. Mainly be to burn in first [8] Coal and gas-making cinder and blowing-out gas, CO, H in speeding to exit₂、CH ₄Deng combustibles, by first [8] uncombusted flying dust and remaining CO, H₂、CH ₄Deng combustibles gas, Then enter second [14] further burning, second [14] bottom is provided with air distribution plate, And have that flue gas flow rate is low, flying dust and combustible can burn at this bed fully. It is surplus Surplus unburned combustible in fly ash is lower than below 1%, also is provided with on second [14] sidewall and blows General mood and the burner noz(zle) [11] of speeding to exit are mainly considered can transfer when tolerance is big Control. Be provided with two drums in the stove, upper drum [1], lower drum [6], low temperature convection tube are arranged Bundle [4], high temperature convection bank [12], and be provided with steam superheater [2], hang water-cooled Screen [16] and header [13]. And be provided with direct current multitube flue dust and separate [3], economizer [5], air preheat [7], by after the smoke duster dedusting, extract out through air-introduced machine again Enter chimney and discharge atmosphere, so just reached the purpose of utility model.

Five, the specific embodiment

Practical operation situation example one:

Boiler at pressure testing, leak test, boil after operations such as stove finish, to boiler feedwater, its boiler carbonated drink flow process: boiler feedwater at first enters drum [1] through economizer [5], stove water enters lower drum [6] by upper drum [1] by low temperature convection bank [4], distributes and forms following four water-flow circuits by being arranged in down-comer on the lower drum [6]:

● pipe laying inlet collection case → pipe laying → pipe laying outlet collection case → hang water-cooled screen inlet header case [13] → hang water-cooled screen [16] → upper drum [1]

● left and right sides water-cooling wall next part → left and right sides water-cooling wall next part case → left and right sides water-cooling wall [18] → left and right sides water-cooling wall upper collecting chamber → upper drum [1]

● preceding water-cooling wall next part case → preceding water-cooling wall [10] and roof tube [17] → upper drum [1]

After saturated vapor is drawn from upper drum [1], form the qualified steam of quality after superheater and outlet collection case are drawn from stop valve through superheater [2].

And flue gas flow: from coal conveyor [9] gas-making cinder and good coal are mixed and to be sent first [8] after joining, after igniting with firewood or charcoal, the air of sending with air blast is sent to first [8] big bellows through air preheater [7] again, go into combustion chamber [8] by air distribution plate, combustible burns first [8], generate the flue gas of high temperature, after reaching uniform temperature, and enable blowing-out gas and speed the valve of exitting, enter nozzle [11], allow waste gas and fuel in first [8], burn as far as possible, the uncombusted solid particle enters second [14] burning through rising and decline flue gas, owing to changed flue gas flow direction and the low cause of cigarette prompt drop, a large amount of unburnt solid particles sediment are in second [14] and convection bank [12] in the flue gas, [4] and multicyclone [3] separate, send second [14] back to by material returning device, blast air-breathing Boiling Combustion again through air preheater [7] heating, the oblique pipe laying of arranging in second [14] can be controlled bed temperature effectively, avoid coking, bed is expected carefully and is more even, the boiling wind speed that is adopted is low to be had only about 1m/s, the flying dust that flue gas carries not only granularity is little, and amount is few, first [8] maintain on the level of higher temperature the whole burner hearth of boiler with second [14] burning, this will very help the smooth combustion of waste gas, the waste gas burning required air can be provided by first [8] blower fan with second [14], the flue gas that the whole combustion process of boiler produces enters superheater [2] together, enter convection bank [12] again, [4] enter multicyclone [3] after, through convection bank [12], [4] separate with the two-stage of multicyclone [3], after comparatively clean flue gas enters economizer [5] and air preheat [7] heat release cooling, enter smoke duster, and extract out into chimney by air-introduced machine, discharge atmosphere, so just reach the purpose of this utility model.

Practical operation situation example two:

When original driving, back operation does not have source exhaust gas.Its operating procedure can be by the fluidized-bed combustion boiler normal operation step, need only will link to each other with dispensing gas firing nozzle [11] with blowing-out gas, and the valve cut-out closes.All the other operations are operated by example one situation, and to the not influence of back operation, just the energy consumption height a bit.

Claims

1. boiler that Chemical Manufacture is used, comprise its furnace wall [15], upper drum [1], lower drum [6], preceding water screen tube [10], left and right sides water screen tube [18], feeder [9], convection tube [12], [4], superheater [2], economizer [5], air preheater [7], its feature: the wall that the wall of the first fluidized bed [8] is provided with the nozzle [11] that burns producing gas blower and the synthetic burning of speeding to exit and second fluid bed [14] is provided with the nozzle [11] that burns part producing gas blower and synthetic dispensing gas firing.