A kind of anti-coking coke oven flue waste gas afterheat recovery unit
Technical field
The invention belongs to coke oven for iron field, more particularly to a kind of anti-coking coke oven flue waste gas afterheat recovery unit.
Background technology
Coke oven can do high-temperature retorting processing to coal, be efficiently converted to coke, coke-stove gas, coal tar, crude benzol
It is efficient energy conversion kiln Deng product.Hanker in coke oven expenditure, the heat of taking out of of 650 DEG C of -700 DEG C of raw coke oven gas accounts for 36%,
It is worth with high recycling.At present, the commercial Application of raw coke oven gas, traditional work are generally realized using cooling handling process
Skill is:Spraying a large amount of 70 DEG C of -75 DEG C of cyclic ammonia waters to high temperature raw coke oven gas makes it cool, and waste heat recovery is realized, however, this can cause
High temperature raw coke oven gas is taken heat out of and wasted because of a large amount of evaporations of cyclic ammonia water.
In the 1980s, conduction oil was once used for tedge recovery raw coke oven gas by major part coke-oven plant of Japan takes heat out of:
Tedge is made jacket pipe by them, and conduction oil passes through jacket pipe and high temperature raw coke oven gas indirect heat exchange, heated high-temperature heat-conductive
Oil can be used for multiple use, such as ammonia still process, Doak Tar Oil, dry as-fired coal etc..Later, China's Ji steel once rose in five holes
Pipe has carried out similar experiment;China's Wuhan Iron and Steel Plant, Ma Gang, Anshan iron and steel plant, ripples steel, Beijing coke-oven plant, the factory of Shenyang coal gas two, the iron of this steel one,
The many enterprises such as table mountain coke-oven plant once reclaimed this partial heat in tedge using water vapor cooling technology;In addition, also there is enterprise
Industry uses the method by medium of nitrogen, with high temperature raw coke oven gas indirect heat exchange.
Existing coke oven coke oven uprising tube raw coke oven gas waste heat recovery takes the structure of thermal, in overall point, in, outer three layers basic knot
Structure.Internal layer is high temperature resistant, the cylinder of corrosion resistant steel alloy material, and raw coke oven gas flows through from bottom to top in cylinder.Centre is core
Heart heat transfer layer, the outer wall of inner cylinder, heat transfer are closely attached to high heat conduction ability, certain thickness high temperature resistant solid dielectric layer
Pipe is in close contact through solid dielectric layer, and with solid dielectric layer, and what is flowed through in heat-transfer pipe is to take thermal medium, and it is being flowed over
The thermal discharge of raw coke oven gas in inner cylinder is absorbed in journey, temperature is raised in flow process from bottom to top.On heat-transfer pipe or spiral
Rise and spiral in the solid dielectric, or be uprightly arranged in solid dielectric layer from bottom to top, solid dielectric layer need to cover whole biography
The outer surface of heat pipe;Outer layer is heat insulation protecting layer, and metal material cylinder posts insulation material on internal face, to inner cylinder and centre
Core heat transfer layer plays a part of being incubated and protected, and reduces heat loss, is not hit.
However, existing coke oven coke oven uprising tube raw coke oven gas waste heat recovery takes thermal more or less to there is problems with:Pass
The structure design of thermal process is unreasonable, low, the raw coke oven gas side wall tar that circulates not unobstructed enough, heat exchange efficiency is bonded causes to block waste
Gas passage, conduction oil coking and blocking conduction oil passage, easily corroded by medium etc. or can not effectively be solved driving and parking and ran
The problem of expanding with heat and contract with cold of journey, this causes above method to be either difficult to successful implementation or is difficult to gratifying effect.
The content of the invention
Technical problem:In order to solve the defect of prior art, more than a kind of anti-coking coke oven flue waste gas
Heat reclamation device.
Technical scheme:A kind of anti-coking coke oven flue waste gas afterheat recovery unit that the present invention is provided, including medium pipeline
(4) and be sequentially connected pressurization superheat section (1), decompression decoking section (2), preheating section (3);The pressurization superheat section (1) is vertical
Set, and internal diameter successively decreases from bottom to top;The decompression decoking section (2) is horizontally disposed with, and internal diameter is incremented by from left to right, decompression decoking
Section (2) bottom angled is set, and lowest part is provided with macropore wire netting (22) provided with collection Jiao's groove (21) at the top of the burnt groove of collection;The preheating
Section (3) is vertically arranged, and its internal diameter is constant;The medium pipeline (4) is located at preheating section (3) and the side wall of pressurization superheat section (1)
It is interior.
As an improvement, the side wall from-inner-to-outer of the pressurization superheat section (1) is sequentially provided with superheat section inner housing (11), overheat
Section heat-conducting medium layer (12), superheat section thermal insulation layer (13) and superheat section shell body (14);The superheat section inner housing (11) is by height
Effect heat-conductive composite material is made, and the high-efficiency heat conduction composite is at least made up of the component of following parts by weight:100 parts of iron, chromium
14.1-15.3 parts, 4.21-4.38 parts of nickel, 0.76-0.91 parts of silicon, 0.45-0.58 parts of carbon, 0.67-0.81 parts of manganese, molybdenum 0.25-
0.38 part, 0.4-0.8 parts of titanium nitride, 1-2 parts of CNT, 1-2 parts of Nanometer Copper.
Improved as another, the high-efficiency heat conduction composite is at least made up of the component of following parts by weight:Iron 100
Part, 14.5-14.7 parts of chromium, 4.28-4.30 parts of nickel, 0.84-0.86 parts of silicon, 0.49-0.51 parts of carbon, 0.75-0.77 parts of manganese, molybdenum
0.29-0.31 parts, 0.5-0.7 parts of titanium nitride, 1.4-1.6 parts of CNT, 1.4-1.6 parts of Nanometer Copper.
Improved as another, the high-efficiency heat conduction composite is at least made up of the component of following parts by weight:Iron 100
Part, 14.6 parts of chromium, 4.29 parts of nickel, 0.85 part of silicon, 0.50 part of carbon, 0.76 part of manganese, 0.30 part of molybdenum, 0.6 part of titanium nitride, CNT
1.5 parts, 1.5 parts of Nanometer Copper.
Improved as another, in addition to fin (15), the fin (15) is located at the inner side of superheat section inner housing (11)
On wall, the fin is made up of high-efficiency heat conduction composite.
Improved as another, in addition to ailhead (16), superheat section inner housing (11) is fixed in described ailhead (16) one end
Lateral wall on, the other end is fixed on the madial wall of superheat section thermal insulation layer (13).
Improved as another, the side wall from-inner-to-outer of the preheating section (3) is sequentially provided with preheating section inner housing (31), pre-
Hot arc heat-conducting medium layer (32), preheating section thermal insulation layer (33) and preheating section shell body (34).
Improved as another, the preheating section inner housing (31) is made up of middle effect heat-conductive composite material, the middle effect is led
Hot composite is at least made up of the component of following parts by weight:100 parts of iron, 14.1-15.3 parts of chromium, 4.21-4.38 parts of nickel, silicon
0.76-0.91 parts, 0.45-0.58 parts of carbon, 0.67-0.81 parts of manganese, 0.25-0.38 parts of molybdenum, 1-2 parts of Nanometer Copper.
Present invention also offers a kind of high-efficiency heat conduction composite for coke oven flue waste gas afterheat recovery unit, at least
It is made up of the component of following parts by weight:100 parts of iron, 14.1-15.3 parts of chromium, 4.21-4.38 parts of nickel, 0.76-0.91 parts of silicon, carbon
0.45-0.58 parts, 0.67-0.81 parts of manganese, 0.25-0.38 parts of molybdenum, 0.4-0.8 parts of titanium nitride, 1-2 parts of CNT, Nanometer Copper
1-2 parts.
Present invention also offers a kind of middle effect heat-conductive composite material for coke oven flue waste gas afterheat recovery unit, at least
It is made up of the component of following parts by weight:100 parts of iron, 14.1-15.3 parts of chromium, 4.21-4.38 parts of nickel, 0.76-0.91 parts of silicon, carbon
0.45-0.58 parts, 0.67-0.81 parts of manganese, 0.25-0.38 parts of molybdenum, 1-2 parts of Nanometer Copper.
Beneficial effect:The waste-heat recovery device that the present invention is provided is simple in construction, and anti-coking effect is good, waste heat recovery efficiency
It is high.
Brief description of the drawings
Fig. 1 is the structural representation of anti-coking coke oven flue waste gas afterheat recovery unit of the present invention.
Fig. 2 is the partial enlarged drawing of pressurization superheat section.
Fig. 3 is the partial enlarged drawing of preheating section.
Embodiment
Anti-coking coke oven flue waste gas afterheat recovery unit of the present invention is further illustrated below.
Embodiment 1
Anti-coking coke oven flue waste gas afterheat recovery unit, including medium pipeline (4) and be sequentially connected pressurization overheat
Section (1), decompression decoking section (2), preheating section (3);The pressurization superheat section (1) is vertically arranged, and internal diameter successively decreases from bottom to top;Institute
Decompression decoking section (2) is stated to be horizontally disposed with, and internal diameter is incremented by from left to right, decompression decoking section (2) bottom angled is set, and lowest part is set
Have and be provided with macropore wire netting (22) at the top of the burnt groove (21) of collection, the burnt groove of collection;The preheating section (3) is vertically arranged, and its internal diameter is constant;
The medium pipeline (4) is in the side wall of preheating section (3) and pressurization superheat section (1).
The side wall from-inner-to-outer of the pressurization superheat section (1) is sequentially provided with superheat section inner housing (11), superheat section heat conduction and is situated between
Matter layer (12), superheat section thermal insulation layer (13) and superheat section shell body (14);The superheat section inner housing (11) is answered by high-efficiency heat conduction
Condensation material is made;Also include fin (15), the fin (15) is on the madial wall of superheat section inner housing (11), the fin
It is made up of high-efficiency heat conduction composite;Also include ailhead (16), superheat section inner housing (11) is fixed in described ailhead (16) one end
Lateral wall on, the other end is fixed on the madial wall of superheat section thermal insulation layer (13).
The high-efficiency heat conduction composite is at least made up of the component of following parts by weight:100 parts of iron, 14.6 parts of chromium, nickel
4.29 parts, 0.85 part of silicon, 0.50 part of carbon, 0.76 part of manganese, 0.30 part of molybdenum, 0.5 part of titanium nitride, 1.5 parts of CNT, Nanometer Copper
1.5 part.
The side wall from-inner-to-outer of the preheating section (3) is sequentially provided with preheating section inner housing (31), preheating section heat-conducting medium layer
(32), preheating section thermal insulation layer (33) and preheating section shell body (34).
The preheating section inner housing (31) by it is middle effect heat-conductive composite material be made, it is described it is middle effect heat-conductive composite material at least by
The component of following parts by weight is made:100 parts of iron, 14.6 parts of chromium, 4.28 parts of nickel, 0.84 part of silicon, 0.52 part of carbon, 0.75 part of manganese, molybdenum
0.31 part, 1.5 parts of Nanometer Copper.
The operation principle of the device:(1) because the shape for heating superheat section is set, flue gas is when the superheat section that pressurizes is in pressurization
Recovery waste heat, the section can make smoke temperature change small, while recovery section waste heat, it is to avoid coking;(2) due to decompression decoking section
Shape is set, and flue gas causes temperature to reduce in this section decompression, and a large amount of cokings can be formed on the wire netting of bottom, are removed so as to play
Burnt effect;(3) flue gas makes media preheating in preheating section and media for heat exchange, although except the reduction of defocused temperature, being still difficult to tie
It is burnt.
Embodiment 2
It is substantially the same manner as Example 1, it the difference is that only:
The high-efficiency heat conduction composite is at least made up of the component of following parts by weight:100 parts of iron, 14.5 parts of chromium, nickel
4.28 parts, 0.86 part of silicon, 0.49 part of carbon, 0.77 part of manganese, 0.29 part of molybdenum, 0.5 part of titanium nitride, 1.6 parts of CNT, Nanometer Copper
1.4 part.
The preheating section inner housing (31) by it is middle effect heat-conductive composite material be made, it is described it is middle effect heat-conductive composite material at least by
The component of following parts by weight is made:100 parts of iron, 14.5 parts of chromium, 4.28 parts of nickel, 0.86 part of silicon, 0.49 part of carbon, 0.77 part of manganese, molybdenum
0.29 part, 1.4 parts of Nanometer Copper.
Embodiment 3
It is substantially the same manner as Example 1, it the difference is that only:
The high-efficiency heat conduction composite is at least made up of the component of following parts by weight:100 parts of iron, 14.7 parts of chromium, nickel
4.30 parts, 0.84 part of silicon, 0.51 part of carbon, 0.75 part of manganese, 0.31 part of molybdenum, 0.7 part of titanium nitride, 1.4 parts of CNT, Nanometer Copper
1.6 part.
The preheating section inner housing (31) by it is middle effect heat-conductive composite material be made, it is described it is middle effect heat-conductive composite material at least by
The component of following parts by weight is made:100 parts of iron, 14.7 parts of chromium, 4.30 parts of nickel, 0.84 part of silicon, 0.51 part of carbon, 0.75 part of manganese, molybdenum
0.31 part, 1.6 parts of Nanometer Copper.
Embodiment 4
It is substantially the same manner as Example 1, it the difference is that only:
The high-efficiency heat conduction composite is at least made up of the component of following parts by weight:100 parts of iron, 14.1 parts of chromium, nickel
4.21 parts, 0.76 part of silicon, 0.58 part of carbon, 0.67 part of manganese, 0.38 part of molybdenum, titanium nitride 0.4,1 part of CNT, 2 parts of Nanometer Copper.
The middle effect heat-conductive composite material is at least made up of the component of following parts by weight:100 parts of iron, 14.1 parts of chromium, nickel
4.21 parts, 0.76 part of silicon, 0.58 part of carbon, 0.67 part of manganese, 0.38 part of molybdenum, 2 parts of Nanometer Copper.
Embodiment 5
It is substantially the same manner as Example 1, it the difference is that only:
The high-efficiency heat conduction composite is at least made up of the component of following parts by weight:100 parts of iron, 15.3 parts of chromium, nickel
4.38 parts, 0.91 part of silicon, 0.45 part of carbon, 0.81 part of manganese, 0.25 part of molybdenum, 0.8 part of titanium nitride, 2 parts of CNT, 1 part of Nanometer Copper.
The middle effect heat-conductive composite material is at least made up of the component of following parts by weight:100 parts of iron, 15.3 parts of chromium, nickel
4.38 parts, 0.91 part of silicon, 0.45 part of carbon, 0.81 part of manganese, 0.25 part of molybdenum, 1 part of Nanometer Copper.
Comparative example 1
Composite 1, is at least made up of the component of following parts by weight:100 parts of iron, 14.6 parts of chromium, 4.29 parts of nickel, silicon 0.85
Part, 0.50 part of carbon, 0.76 part of manganese, 0.30 part of molybdenum.
Comparative example 2
Composite 2, is at least made up of the component of following parts by weight:100 parts of iron, 14.6 parts of chromium, 4.29 parts of nickel, silicon 0.85
Part, 0.50 part of carbon, 0.76 part of manganese, 0.30 part of molybdenum, 1.5 parts of CNT.
Comparative example 3
Composite 3, is at least made up of the component of following parts by weight:100 parts of iron, 14.6 parts of chromium, 4.29 parts of nickel, silicon 0.85
Part, 0.50 part of carbon, 0.76 part of manganese, 0.30 part of molybdenum, 1.5 parts of Nanometer Copper.
Comparative example 4
Composite 1, is at least made up of the component of following parts by weight:100 parts of iron, 14.6 parts of chromium, 4.29 parts of nickel, silicon 0.85
Part, 0.50 part of carbon, 0.76 part of manganese, 0.30 part of molybdenum, 0.6 part of titanium nitride.
The performance of testing example 1 to 5, comparative example 1-3 composite, see the table below.
Composite is originated |
Thermal conductivity factor (W/m.K) |
Composite is originated |
Thermal conductivity factor (W/m.K) |
Embodiment 1 |
1669 |
Comparative example 1 |
479 |
Embodiment 2 |
1492 |
Comparative example 2 |
958 |
Embodiment 3 |
1481 |
Comparative example 3 |
642 |
Embodiment 4 |
1411 |
Comparative example 4 |
581 |
Embodiment 5 |
1397 |
|
|