A kind of coke oven flue waste gas afterheat recovery unit of integration desulfurization denitration
Technical field
The invention belongs to coke oven for iron field, the coke oven flue waste gas residual heat of more particularly to a kind of integration desulfurization denitration is returned
Receiving apparatus.
Background technology
At present, the desulphurization denitration processing of domestic coke oven flue gas is still in starting stage, most coke-oven plants, Jiao of steel mill
Kiln gas is still directly discharged in air without processing.Such way has had a strong impact on the atmospheric environment of locality, gives people
Health also bring very big hidden danger.With tightened up coke oven flue gas discharge standard GB16171-2012 appearance, coke oven cigarette
The desulphurization and denitration of gas is by the indispensable technique as domestic all coking production factories.It is contemplated that, the discharge standard of following flue gas
It can be drawn close to tightened up International Environmental Protection standard, to adapt to international energy-conserving and environment-protective trend.Therefore it is necessary to have a kind of reliable
System and technique realize the desulphurization denitration of coke oven flue gas and the purpose of waste heat recovery.
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 is accounted for
36%, it is worth with high recycling.At present, the commercial Application of raw coke oven gas is generally realized using cooling handling process,
Traditional handicraft 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 realizes waste heat recovery, however,
This can cause high temperature raw coke oven gas take out of heat 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 was once on five holes
Riser 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, this steel one
The many enterprises such as iron, table mountain coke-oven plant once reclaimed this partial heat in tedge using water vapor cooling technology;In addition,
There is enterprise to use 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 is closely attached to high heat conduction ability, certain thickness high temperature resistant solid dielectric layer, is passed
Heat 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 in stream
The thermal discharge of raw coke oven gas in inner cylinder is absorbed during dynamic, temperature is raised in flow process from bottom to top.Heat-transfer pipe or spiral shell
Screw on to 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
The outer surface of individual heat-transfer pipe;Outer layer is heat insulation protecting layer, and metal material cylinder posts insulation material on internal face, to inner cylinder and
Intercooler 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
Raw coke oven 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 operation
The problem of expanding with heat and contract with cold of process, this causes above method to be either difficult to successful implementation or is difficult to gratifying effect
Really.
The content of the invention
Technical problem:In order to solve the defect of prior art, the invention provides a kind of coke oven of integration desulfurization denitration
Stack gases waste-heat recovery device.
Technical scheme:A kind of coke oven flue waste gas afterheat recovery unit for integration desulfurization denitration that the present invention is provided, bag
Coke oven (1), the first triple valve (2), emergent chimney (3), tank used for storing ammonia (51), ammoniacal liquor preheating device (52), reducing agent is included to carry
For device (81), preheating device (82), the second triple valve (83), residual heat using device (84), the first temperature-detecting device (85)
And be sequentially connected board-like decoking heat exchanger (4), desulfurizer (5), preheating device (6), heater (7), SRC denitrations
Device (8), high-efficiency waste heat recovery device (9), chimney (10);First triple valve (2) respectively with coke oven (1), board-like waste heat
Retracting device (4), emergent chimney (3) connection;The tank used for storing ammonia (51), ammoniacal liquor preheating device (52), desulfurizer (5)
Ammonia spray mouthful is sequentially connected;The reducing agent provides device (81), preheating device (82), the reduction of SRC denitrification apparatus (8)
Agent entrance is sequentially connected;The board-like decoking heat exchanger (4) includes waste heat flue (41), one group of heat exchanger plates (42), cold water
The burnt pipe (45) of pipeline (43), hot water pipeline (44), collection, coke removing appts (46), coke discharging tube (47), one group of heat exchanger plates (42)
It is alternately disposed on waste heat flue (41) upper wall and lower wall, is cold water medium channel in the windward side of heat exchanger plates (42)
(48) it is connected with cold water pipes (43), is hot aqueous medium's passage (49) and hot water pipeline (44) in the lee face of heat exchanger plates (42)
Connection, cold water medium channel (48) and hot aqueous medium's passage (49) are interconnected, and coke removing appts (46) are located at heat exchanger plates (42)
On windward side, coke discharging tube (47) is connected in waste heat flue (41) lower wall and with the burnt pipe (45) of collection;It is described board-like to remove
The hot water pipeline (44) of burnt heat exchanger (4) and the high-temperature medium pipeline of preheating device (6), the high temperature of ammoniacal liquor preheating device (52)
Medium pipeline is sequentially connected cyclization;The high-temperature medium pipe outlet and preheating device (82) of the high-efficiency waste heat recovery device (9)
High-temperature medium pipeline, the first temperature-detecting device (85), the second triple valve (83) be sequentially connected, the second triple valve (83) point
High-temperature medium entrance not with residual heat using device (84) and high temperature exhaust-heat recovery unit (6) is connected, residual heat using device
(84) the high-temperature medium entrance with high temperature exhaust-heat recovery unit (6) is connected.
As an improvement, the waste heat flue (11) is obliquely installed, inclination angle is 5-20 °.
Improved as another, the windward side of the heat exchanger plates (12) is made up of the burnt composite of high-efficiency heat conduction collection, described
High-efficiency heat conduction collection Jiao's composite is made at least to be made up of the component of following parts by weight:100 parts of iron, 11.6-12.9 parts of chromium, nickel
5.42-5.94 parts, 0.66-0.87 parts of silicon, 0.48-0.59 parts of carbon, 0.66-0.85 parts of manganese, 0.4-0.8 parts of titanium nitride, carbon nanometer
1-2 parts of pipe, 0.5-1.5 parts of silicon nitride, 1-3 parts of Nanometer Copper, 1-2 parts of nano aluminium oxide, 0.5-1.5 parts of nano manganese oxide.
Improved as another, in addition to second temperature detection means, the second temperature detection means is located at efficiently remaining
The smoke outlet of heat reclamation device (9).
Improved as another, in addition to control device, the control device respectively with the first triple valve (2), the two or three
Port valve (83), the first temperature-detecting device (85), the connection of second temperature detection means.
Improved as another, the residual heat using device (84) is the steam turbine being connected with TRT.
Improved as another, the high temperature exhaust-heat recovery unit (9) includes high temperature raw coke oven gas pipeline (91), heat exchange disk
Manage (92);The high temperature raw coke oven gas pipeline (91) includes outer tube wall (911), thermal insulation layer (912), solid and is situated between successively from outer to inner
Matter layer (913), inner tube wall (914);The lower flange (94) is welded with outer tube wall (911) bottom, inner tube wall (914) bottom respectively
Connect in succession;The upper flange (95) is provided with ring-shaped depression (951), and the upper flange (95) at the top of outer tube wall (911) with welding
At the top of connection, the inner tube wall (914) in ring-shaped depression (951);The expansion box (93) is fixedly welded on outer tube wall
(911) on lateral wall, the expansion box (93) is provided with welding expansion joint (931);The heat exchange coil (92) is located at flexible solid
In body dielectric layer (913), its lower end is working medium inlet tube (921), and upper end is sender property outlet pipe (922), sender property outlet pipe
(922) outer tube wall (911), expansion box (93), expansion joint (931), sender property outlet pipe (922) and expansion joint (931) are sequentially passed through
Junction is welded to connect;The inner tube wall (914) is made up of high-efficiency heat conduction denitration composite, and the high-efficiency heat conduction denitration is answered
Condensation material is at least made up of the component of following parts by weight:100 parts of iron, 11.2-13.1 parts of chromium, 5.08-5.16 parts of nickel, silicon 0.83-
0.99 part, 0.60-0.70 parts of carbon, 0.65-0.78 parts of manganese, 0.4-0.8 parts of titanium nitride, 0.5-1.5 parts of CNT, Nanometer Copper
1-2 parts, 1-2 parts of Nano-Zinc, 0.2-0.8 parts of chitosan, 1-2 parts of titanium oxide, 0.5-1.0 parts of vanadic anhydride, tungsten oxide 0.2-
0.4 part, 0.1-0.3 parts of molybdenum oxide.
Improved as another, in addition to fin (915), madial wall of the fin (915) located at inner tube wall (914)
On, the fin is made up of high-efficiency heat conduction composite;Also include ailhead (916), described ailhead (916) one end is fixed on interior
On the lateral wall of barrel (914), the other end is fixed on the madial wall of outer tube wall (911).
Beneficial effect:The waste-heat recovery device that the present invention is provided can simultaneous SO_2 and NO removal, and waste heat recovery efficiency high, effect
It is good.
Brief description of the drawings
Fig. 1 is the structural representation of the coke oven flue waste gas afterheat recovery unit of integration desulfurization denitration of the present invention.
Fig. 2 is the board-like structural representation for devoking heat exchanger.
Fig. 3 is the structural representation of high-efficiency waste heat recovery device.
Fig. 4 is the partial enlarged drawing one of high-efficiency waste heat recovery device.
Fig. 5 is the partial enlarged drawing two of high-efficiency waste heat recovery device.
Embodiment
The coke oven flue waste gas afterheat recovery unit of integration desulfurization denitration of the present invention is further illustrated below.
Embodiment 1
The coke oven flue waste gas afterheat recovery unit of integration desulfurization denitration, including coke oven (1), the first triple valve (2),
Emergent chimney (3), tank used for storing ammonia (51), ammoniacal liquor preheating device (52), reducing agent provide device (81), preheating device (82), the
Two triple valves (83), residual heat using device (84), the first temperature-detecting device (85) and the board-like decoking heat exchange being sequentially connected
Device (4), desulfurizer (5), preheating device (6), heater (7), SRC denitrification apparatus (8), high-efficiency waste heat recovery device
(9), chimney (10);First triple valve (2) respectively with coke oven (1), board-like waste-heat recovery device (4), emergent chimney (3)
Connection;The tank used for storing ammonia (51), ammoniacal liquor preheating device (52), the ammonia spray mouthful of desulfurizer (5) are sequentially connected;It is described
Reducing agent provides device (81), preheating device (82), the reducing agent entrance of SRC denitrification apparatus (8) and is sequentially connected;It is described board-like
Devoke heat exchanger (4) include waste heat flue (41), one group of heat exchanger plates (42), cold water pipes (43), hot water pipeline (44),
The burnt pipe (45) of collection, coke removing appts (46), coke discharging tube (47), one group of heat exchanger plates (42) are alternately disposed at waste heat flue
(41) on upper wall and lower wall, it is connected, changes with cold water pipes (43) for cold water medium channel (48) in the windward side of heat exchanger plates (42)
It is connected in the lee face of hot plate (42) for hot aqueous medium's passage (49) with hot water pipeline (44), cold water medium channel (48) and heat
Aqueous medium passage (49) is interconnected, and coke removing appts (46) are on the windward side of heat exchanger plates (42), and coke discharging tube (47) is located at remaining
It is connected in heat smoke pipeline (41) lower wall and with the burnt pipe (45) of collection;The hot water pipeline (44) of the board-like decoking heat exchanger (4)
High-temperature medium pipeline, the high-temperature medium pipeline of ammoniacal liquor preheating device (52) with preheating device (6) are sequentially connected cyclization;It is described
The high-temperature medium pipe outlet of high-efficiency waste heat recovery device (9) and the high-temperature medium pipeline of preheating device (82), the inspection of the first temperature
Survey device (85), the second triple valve (83) be sequentially connected, the second triple valve (83) respectively with residual heat using device (84) and high temperature
The high-temperature medium entrance connection of waste-heat recovery device (6), residual heat using device (84) and high temperature exhaust-heat recovery unit (6)
High-temperature medium entrance connection.
The waste heat flue (11) is obliquely installed, and inclination angle is 5-20 °.
The windward side of the heat exchanger plates (12) is made up of the burnt composite of high-efficiency heat conduction collection, and high-efficiency heat conduction collection Jiao is compound
Material is made at least to be made up of the component of following parts by weight:100 parts of iron, 12.4 parts of chromium, 5.67 parts of nickel, 0.78 part of silicon, carbon 0.55
Part, 0.76 part of manganese, 0.6 part of titanium nitride, 1.5 parts of CNT, 1.0 parts of silicon nitride, 2 parts of Nanometer Copper, 1.5 parts of nano aluminium oxide,
1 part of nano manganese oxide.
Also include second temperature detection means, the second temperature detection means is located at high-efficiency waste heat recovery device (9)
Smoke outlet.
Also include control device, the control device respectively with the first triple valve (2), the second triple valve (83), first temperature
Spend detection means (85), the connection of second temperature detection means.
The residual heat using device (84) is the steam turbine being connected with TRT.
The high temperature exhaust-heat recovery unit (9) includes high temperature raw coke oven gas pipeline (91), heat exchange coil (92);The high temperature
Raw coke oven gas pipeline (91) includes outer tube wall (911), thermal insulation layer (912), solid dielectric layer (913), inner tube wall successively from outer to inner
(914);The lower flange (94) is welded to connect with outer tube wall (911) bottom, inner tube wall (914) bottom respectively;The upper flange
(95) ring-shaped depression (951) is provided with, the upper flange (95) at the top of outer tube wall (911) with being welded to connect, the inner tube wall
(914) top is in ring-shaped depression (951);The expansion box (93) is fixedly welded on outer tube wall (911) lateral wall, institute
Expansion box (93) is stated provided with welding expansion joint (931);The heat exchange coil (92) is interior located at flexible solid dielectric layer (913),
Its lower end is working medium inlet tube (921), and upper end is sender property outlet pipe (922), and sender property outlet pipe (922) sequentially passes through outer tube wall
(911), expansion box (93), expansion joint (931), sender property outlet pipe (922) and expansion joint (931) junction are welded to connect;It is described
Inner tube wall (914) is made up of high-efficiency heat conduction denitration composite, and the high-efficiency heat conduction denitration composite is at least by following weight
The component of part is made:100 parts of iron, 12.5 parts of chromium, 5.12 parts of nickel, 0.88 part of silicon, 0.65 part of carbon, 0.69 part of manganese, titanium nitride 0.6
Part, 1.0 parts of CNT, 1.5 parts of Nanometer Copper, 1.5 parts of Nano-Zinc, 0.5 part of chitosan, 1.5 parts of titanium oxide, vanadic anhydride
0.7 part, 0.3 part of tungsten oxide, 0.2 part of molybdenum oxide.
Also include fin (915), the fin (915) is on the madial wall of inner tube wall (914), and the fin is by height
Effect heat-conductive composite material is made;Also include ailhead (916), the outside of inner tube wall (914) is fixed in described ailhead (916) one end
On wall, the other end is fixed on the madial wall of outer tube wall (911).
The operation principle of the device:Flue gas is by the first triple valve is into recovery waste heat in board-like decoking heat exchanger and removes
Jiao, waste heat is used for preheating device heating, ammoniacal liquor is preheated;Enter back into desulfurization in desulfurizer;Enter preheating device after desulfurization
Preheating, enters back into heater and is heated to being adapted to after the temperature of SRC denitrations, enter back into denitration in SRC denitrification apparatus, denitration
Less, flue gas enters recovery waste heat in high-efficiency waste heat recovery device to temperature change afterwards, and the waste heat of recovery is used to preheat reducing agent
And the purposes such as generating of doing work;Flue gas after recovery waste heat is discharged through chimney;Once running into emergency, flue gas is available should
Anxious chimney is expelled directly out.
Embodiment 2
It is substantially the same manner as Example 1, it the difference is that only:
The burnt composite of the high-efficiency heat conduction collection is made at least to be made up of the component of following parts by weight:100 parts of iron, chromium 12.2
Part, 5.69 parts of nickel, 0.76 part of silicon, 0.57 part of carbon, 0.74 part of manganese, 0.5 part of titanium nitride, 1.7 parts of CNT, silicon nitride 0.8
Part, 1.8 parts of Nanometer Copper, 1.7 parts of nano aluminium oxide, 0.8 part of nano manganese oxide;
The high-efficiency heat conduction denitration composite is at least made up of the component of following parts by weight:100 parts of iron, 11.2 parts of chromium,
5.08 parts of nickel, 0.99 part of silicon, 0.60 part of carbon, 0.78 part of manganese, 0.5 part of titanium nitride, 0.5 part of CNT, Nanometer Copper 2 part, nanometer
2 parts of zinc, 0.2 part of chitosan, 2 parts of titanium oxide, 0.5 part of vanadic anhydride, 0.4 part of tungsten oxide, 0.1 part of molybdenum oxide.
Embodiment 3
It is substantially the same manner as Example 1, it the difference is that only:
The burnt composite of the high-efficiency heat conduction collection is made at least to be made up of the component of following parts by weight:100 parts of iron, chromium 12.6
Part, 5.65 parts of nickel, 0.80 part of silicon, 0.53 part of carbon, 0.78 part of manganese, 0.7 part of titanium nitride, 1.7 parts of CNT, silicon nitride 1.2
Part, 2.2 parts of Nanometer Copper, 1.3 parts of nano aluminium oxide, 1.2 parts of nano manganese oxide;
The high-efficiency heat conduction denitration composite is at least made up of the component of following parts by weight:100 parts of iron, 13.1 parts of chromium,
5.16 parts of nickel, 0.83 part of silicon, 0.70 part of carbon, 0.65 part of manganese, 0.7 part of titanium nitride, 1.5 parts of CNT, Nanometer Copper 1 part, nanometer
1 part of zinc, 0.8 part of chitosan, 1 part of titanium oxide, 1.0 parts of vanadic anhydride, 0.2 part of tungsten oxide, 0.3 part of molybdenum oxide.
Embodiment 4
It is substantially the same manner as Example 1, it the difference is that only:
The burnt composite of the high-efficiency heat conduction collection is made at least to be made up of the component of following parts by weight:100 parts of iron, chromium 11.6
Part, 5.94 parts of nickel, 0.66 part of silicon, 0.59 part of carbon, 0.85 part of manganese, 0.4 part of titanium carbonitride, 1 part of nanotube, 1.5 parts of silicon nitride,
1 part of Nanometer Copper, 2 parts of nano aluminium oxide, 0.5 part of nano manganese oxide;
The high-efficiency heat conduction denitration composite is at least made up of the component of following parts by weight:100 parts of iron, 12.3 parts of chromium,
5.14 parts of nickel, 0.86 part of silicon, 0.67 part of carbon, 0.67 part of manganese, 0.4 part of titanium nitride, 1.2 parts of CNT, 1.3 parts of Nanometer Copper, receive
1.7 parts of zinc of rice, 0.4 part of chitosan, 1.7 parts of titanium oxide, 0.6 part of vanadic anhydride, 0.4 part of tungsten oxide, 0.1 part of molybdenum oxide.
Embodiment 5
It is substantially the same manner as Example 1, it the difference is that only:
The burnt composite of the high-efficiency heat conduction collection is made at least to be made up of the component of following parts by weight:100 parts of iron, chromium 12.9
Part, 5.42 parts of nickel, 0.87 part of silicon, 0.48 part of carbon, 0.66 part of manganese, 0.8 part of titanium nitride, 2 parts of CNT, 0.5 part of silicon nitride,
3 parts of Nanometer Copper, 1 part of nano aluminium oxide, 1.5 parts of nano manganese oxide;
The high-efficiency heat conduction denitration composite is at least made up of the component of following parts by weight:100 parts of iron, 12.7 parts of chromium,
5.10 parts of nickel, 0.90 part of silicon, 0.63 part of carbon, 0.71 part of manganese, 0.8 part of titanium nitride, 0.8 part of CNT, 1.7 parts of Nanometer Copper, receive
1.3 parts of zinc of rice, 0.6 part of chitosan, 1.3 parts of titanium oxide, 0.8 part of vanadic anhydride, 0.2 part of tungsten oxide, 0.3 part of molybdenum oxide.
Comparative example 1
Composite 1 is made up of the component of following parts by weight:100 parts of iron, 12.4 parts of chromium, 5.67 parts of nickel, 0.78 part of silicon,
0.55 part of carbon, 0.76 part of manganese;
Composite 2 is made up of the component of following parts by weight:100 parts of iron, 12.4 parts of chromium, 5.67 parts of nickel, 0.78 part of silicon,
0.55 part of carbon, 0.76 part of manganese, 1.5 parts of CNT;
Composite 3 is made up of the component of following parts by weight:100 parts of iron, 12.4 parts of chromium, 5.67 parts of nickel, 0.78 part of silicon,
0.55 part of carbon, 0.76 part of manganese, 1.0 parts of silicon nitride;
Composite 4 is made up of the component of following parts by weight:100 parts of iron, 12.4 parts of chromium, 5.67 parts of nickel, 0.78 part of silicon,
0.55 part of carbon, 0.76 part of manganese, 2 parts of Nanometer Copper;
Composite 5 is made up of the component of following parts by weight:100 parts of iron, 12.4 parts of chromium, 5.67 parts of nickel, 0.78 part of silicon,
0.55 part of carbon, 0.76 part of manganese, 1.0 parts of nano aluminium oxide;
Composite 6 is made up of the component of following parts by weight:100 parts of iron, 12.4 parts of chromium, 5.67 parts of nickel, 0.78 part of silicon,
0.55 part of carbon, 0.76 part of manganese, 1 part of nano manganese oxide.
Composite 7 is made up of the component of following parts by weight:100 parts of iron, 12.4 parts of chromium, 5.67 parts of nickel, 0.78 part of silicon,
0.55 part of carbon, 0.76 part of manganese;0.6 part of titanium nitride.
Comparative example 2
Composite 11, is at least made up of the component of following parts by weight:100 parts of iron, 12.5 parts of chromium, 5.12 parts of nickel, silicon
0.88 part, 0.65 part of carbon, 0.69 part of manganese.
Composite 12, is at least made up of the component of following parts by weight:100 parts of iron, 12.5 parts of chromium, 5.12 parts of nickel, silicon
0.88 part, 0.65 part of carbon, 0.69 part of manganese, 1.0 parts of CNT.
Composite 13, is at least made up of the component of following parts by weight:100 parts of iron, 12.5 parts of chromium, 5.12 parts of nickel, silicon
0.88 part, 0.65 part of carbon, 0.69 part of manganese, 1.5 parts of Nanometer Copper.
Composite 14, is at least made up of the component of following parts by weight:100 parts of iron, 12.5 parts of chromium, 5.12 parts of nickel, silicon
0.88 part, 0.65 part of carbon, 0.69 part of manganese, 1.5 parts of Nano-Zinc.
The performance of testing example 1 to 5, comparative example 1-2 composite, see the table below.