CN200982634Y - Cluster type gasification or combustion nozzle - Google Patents

Abstract

The utility model relates to a synthetic gas preparing apparatus utilizing hydrocarbons as raw material and discloses a bunched nozzle for gasification or combustion, which comprises a shell (5) and plural nozzles (11) arranged inside the shell (5). Each nozzle (11) comprises an outer casing (3), an inner casing (4) inside the outer casing (3), a lower pipe board (6), an upper pipe board (7), and a cooling chamber (13). Compared with traditional concentric casing-type nozzles (two-channel nozzles, three-channel nozzles and multi-channel nozzles for instance), the utility model has the advantages that, the flame is relatively short and essentially takes a shape of a rectangle, which is favorable for prolonging useful life and protecting firebricks on the lower portion of a gasification furnace, the retention time is in narrow distribution, which improves carbon transformation, and the nozzles are of reasonable structures, which is favorable for improving useful lives of nozzles.

Description

Beaming type gasification or burner noz(zle)

Technical field

It is the device of feedstock production synthesis gas that the utility model relates to the hydrocarbons, relates in particular to a kind of gasification or burner noz(zle).

Background technology

Synthesis gas is common techniques, source technology, the key technology of producing synthetic ammonia (presoma of urea), synthesizing methanol, dimethyl ether, artificial oil, hydrogen manufacturing, sponge iron production, and nozzle is one of key technology of air flow bed production synthesis gas, people have carried out a large amount of R﹠D works in this field, many patents have been formed, representationally be: Shell (ZL 90103807.5), Texaco (ZL94193847.6) and East China University of Science (ZL 98110616.1).But from the conversion ratio of raising coal and the angle in service life of refractory brick, these technology can't satisfy industrial requirements.The conversion ratio of above-mentioned gasification technology coal is low, refractory brick life short, and outside the Pass having with technological factor, major reason is relevant with nozzle arrangements.The outer mix nozzle of air-flowing type thimble tube belongs to the jet type, forms restricted jet in gasification furnace, owing to entrainment, reflux mass is more than the several times of jet quality:

$\frac{m_e}{m_0}=0.32\frac{x}{d_0}-1---\left(1\right)$

m _e-entrainment the current mass flow rate; m ₀-jet total amount flow rate; The x-axis direction is apart from spout length, m; d ₀-nozzle diameter, m.([1]Ricou，F.P.and?spalding，D.B.，“measurements?ofentrainments?by?axisymmetrical?turbulent?jets”，J.Fluid?Mech.，1961，1，pp21-32)。The semiempirical formula of the relevant length of flame:

$\frac{L}{d}=6(R+1){\left(\frac{{\mathrm{\ρ}}_e}{{\mathrm{\ρ}}_F}\right)}^{\frac{1}{2}}---\left(2\right)$

R is chemistry meter heavy air/fuel mass than (with CH ₄Be example, R=17.25); ρ _e-fuel density; The L-length of flame, m; ρ _F-average flame gas density; The d-nozzle diameter, m.([2]Guenther，R.，Gaswrme，1966，15，p376)。

Know that by (2) formula nozzle diameter reduces will make the drop of the flame; Know by (1) formula, carry (entrainmenting) amount accordingly and must reduce.

Summary of the invention

The utility model technical issues that need to address are to disclose a kind of beaming type gasification or burner noz(zle), to overcome the above-mentioned defective that prior art exists.

Beaming type gasification described in the utility model or burner noz(zle) comprise housing and N the nozzle that is arranged in the housing, N＞1;

Said nozzle comprises outer tube and is arranged on outer tube interior inner sleeve, lower perforated plate, upper perforated plate and cooling chamber;

Said outer tube flushes with the inner sleeve lower end, and outer tube and lower perforated plate are affixed, and inner sleeve and upper perforated plate are affixed, and lower perforated plate and upper perforated plate are affixed with the inwall of housing respectively;

Cooling chamber is arranged on the exit of nozzle;

The top of housing is provided with coal slurry or other hydrocarbons imports and gasifying medium import, and coal slurry or other hydrocarbons imports are connected with inner sleeve, and the gasifying medium import is connected with outer tube;

Beaming type gasification of the present utility model or burner noz(zle) can be installed in it on air flow bed, and being used for the hydrocarbons is the feedstock production synthesis gas, comprises the steps:

Hydrocarbons enters inner sleeve from inlet, and its speed is 1～20m/s;

Gasifying medium enters outer tube from inlet, and its speed is 10～200m/s;

Said gasifying medium is selected from pure O2, CO2, water vapour, airborne a kind of or their mixture;

The air flow bed operating pressure is 1.0～10.0MPa, and temperature is 1200～1700 ℃;

Said hydrocarbons comprises the material of coal, water-coal-slurry, natural gas, living beings and other hydrocarbon-containiproducts.

Adopt above-mentioned above-mentioned beaming type gasification or burner noz(zle), under the identical situation of other process conditions, it is compared with traditional concentric locking collar tubular type nozzle (for example two passages, triple channel, multi-channel nozzle), advantage is as follows: flame is shorter relatively, be tending towards rectangle, help protecting gasification furnace middle and lower part refractory brick, prolong its service life; The time of staying distributes narrower, helps improving the conversion ratio of carbon; Nozzle arrangements is reasonable, helps improving nozzle service life.

Description of drawings

Fig. 1 is beaming type gasification or burner noz(zle) elevation cross-sectional view;

Fig. 2 is that the A-A of Fig. 1 is to section.

The specific embodiment

Referring to Fig. 1 and Fig. 2, beaming type gasification described in the utility model or burner noz(zle) comprise housing 5 and N the nozzle 11 that is arranged in the housing 5, and nozzle 11 preferably is vertically set in the housing 5, and the axis of nozzle 11 is preferably parallel to each other, N＞1, preferred N=2～300;

Said nozzle 11 comprises outer tube 3 and the inner sleeve 4, lower perforated plate 6, upper perforated plate 7 and the cooling chamber 13 that are arranged in the outer tube 3;

Said outer tube 3 flushes with inner sleeve 4 lower ends, and outer tube 3 is affixed with lower perforated plate 6, and inner sleeve 4 is affixed with upper perforated plate 7, and lower perforated plate 6 and upper perforated plate 7 are affixed with the inwall of housing 5 respectively, outer tube 3 and inner sleeve 4 the two best coaxial line;

Tube pitch is d～10d between the outer tube 3, and d is outer tube 3 overall diameters;

Cooling chamber 13 is arranged on outlet 17 places of nozzle 11, and said cooling chamber 13 comprises the cover plate 2 on the U-shaped shell 1 of fixedlying connected with housing 5, U-shaped shell 1 top and is arranged on cooling water inlet pipe 14 and outlet pipe 15 on the cover plate 2; Cooling water inlet pipe 14 preferably insert U-shaped shell 1 the interior end and, and outlet pipe 15 makes the cooling waters in the cooling chamber 13 form rotation near cover plates 2, more helps conducting heat;

The top of housing 5 is provided with coal slurry or other hydrocarbons imports 10 and gasifying medium import 8, and coal slurry or other hydrocarbons imports 10 are connected with inner sleeve 4, and gasifying medium import 8 is connected with outer tube 3;

U-shaped shell 1 is healed height better with the affixed position of cover plate 2 far from the bottom, and the preferred L of the utility model is～40mm;

Nozzle height H is 100～3000mm, and too high then resistance increases, too short then flame instability.

Location tube sheet 12 with limits nozzle 11 vibration when working is set in the middle part of being preferably in the housing 5.

Claims (6)

1. beaming type gasification or burner noz(zle) is characterized in that, comprise housing (5) and are arranged on N nozzle (11) in the housing (5), N＞1;

Said nozzle (11) comprises outer tube (3) and is arranged on outer tube (3) interior inner sleeve (4), lower perforated plate (6), upper perforated plate (7) and cooling chamber (13);

Said outer tube (3) flushes with inner sleeve (4) lower end, and outer tube (3) is affixed with lower perforated plate (6), and inner sleeve (4) is affixed with upper perforated plate (7), and lower perforated plate (6) and upper perforated plate (7) are affixed with the inwall of housing (5) respectively; Nozzle (11) is vertically set in the housing (5), and the axis of nozzle (11) is parallel to each other; Outer tube (3) and the two coaxial line of inner sleeve (4);

Cooling chamber (13) is arranged on the outlet (17) of nozzle (11) and locates;

The top of housing (5) is provided with coal slurry or other hydrocarbons imports (10) and gasifying medium import (8), coal slurry or other hydrocarbons imports (10) are connected with inner sleeve (4), gasifying medium import (8) is connected with outer tube (3), tube pitch is d～10d between the outer tube (3), and d is outer tube (a 3) overall diameter.

2. beaming type gasification according to claim 1 or burner noz(zle), it is characterized in that said cooling chamber (13) comprises the cover plate (2) on the U-shaped shell (1) of fixedlying connected with housing (5), U-shaped shell (1) top and is arranged on cooling water inlet pipe (14) and outlet pipe (15) on the cover plate (2).

3. beaming type gasification according to claim 2 or burner noz(zle) is characterized in that cooling water inlet pipe (14) inserts the inner bottom surface of U-shaped shell (1), and outlet pipe (15) is near cover plate (2).

4. beaming type gasification according to claim 2 or burner noz(zle) is characterized in that U-shaped shell (1) with the affixed position L of cover plate (2) is～40mm.

5. beaming type gasification according to claim 1 or burner noz(zle) is characterized in that nozzle height H is 100～3000mm, N=2～300.

6. according to claim 1～5 each described beaming type gasification or burner noz(zle), it is characterized in that the middle part is provided with a location tube sheet (12) with limits nozzle (11) vibration when working in housing (5).

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