Blast furnace gas power generation combustion equipment
Technical Field
The invention relates to the technical field of iron making, in particular to a blast furnace gas power generation combustion device.
Background
Blast furnace gas is a byproduct combustible gas in the blast furnace ironmaking production process, the main components of the blast furnace gas are CO, CO2, N2, H2, CH4 and the like, if the blast furnace gas is directly discharged without treatment, the environment is polluted, the resource waste is caused, in order to improve the utilization rate of resources and respond to the call of national energy conservation and emission reduction, many steel plants begin to utilize combustion equipment to generate electricity for the blast furnace gas, most of the existing combustion equipment have simple structures, the characteristic of low heat value of the blast furnace gas is not considered, the combustion time is long, the generated energy is low, the production cost is high, in addition, most of the combustion equipment do not utilize and treat the flue gas generated by combustion, for example, a blast furnace gas power generation device with the publication number of CN104420905A, the energy-saving effect is poor, and secondary pollution is easily caused.
Therefore, there is a need to design a blast furnace gas power generation combustion apparatus to solve such problems.
Disclosure of Invention
The present invention is directed to a blast furnace gas power generation combustion facility to solve the problems of the background art described above.
In order to achieve the purpose, the invention provides the following technical scheme: a blast furnace gas power generation combustion device comprises a device body, a blast furnace gas delivery pipe, a gravity dust collector, a primary purified gas delivery pipe, a cyclone dust collector, a secondary purified gas delivery pipe, a bag-type dust collector, a clean gas header pipe, a first branch pipe, a pressure reducing valve group, a clean gas storage tank, a second branch pipe, a steam delivery pipe, a steam turbine, a generator, a steam output pipe, a condenser, a condensate pipe, a water pump, a backflow pipe, a combustion tank, support legs, a programmable program controller, an igniter, a gas inlet, a combustion-supporting air inlet, a smoke extraction pipe, a filter, a water replenishing port, a backflow port, a steam outlet, a combustion chamber, a steam chamber, a sandwich layer, a gas mixing chamber, a smoke outlet, an exhaust fan, a first filter screen, a second filter screen, a dust exhaust port, an inclined plate, a baffle plate, a gas homogenizing plate, the gravity dust collector is installed at one end of the blast furnace gas conveying pipe, the first-stage purified gas conveying pipe is fixedly connected to one end of the gravity dust collector, the cyclone dust collector is installed at one end of the first-stage purified gas conveying pipe, the second-stage purified gas conveying pipe is fixedly connected to the top end of the cyclone dust collector, the bag-type dust collector is installed at one end of the second-stage purified gas conveying pipe, the clean gas header pipe is fixedly connected to one end of the bag-type dust collector, the first branch pipe is arranged at the top end of the clean gas header pipe, the pressure reducing valve group is installed in the middle of the first branch pipe, the clean gas storage tank is installed at one end of the first branch pipe, the second branch pipe is arranged at the bottom end of the clean gas header pipe, the equipment body is installed at one end of the second branch pipe, and the, the programmable logic controller is installed on the front surface of the combustion tank, the interlayer is arranged on the inner side of the combustion tank, the smoke extraction pipe is installed on the top end of the left side of the interlayer, the filter is installed at the bottom end of the smoke extraction pipe, the first filter screen is installed at the top end inside the filter, the dust exhaust port is formed in the bottom side of the first filter screen, the second filter screen is installed at the bottom of the first filter screen, the exhaust fan is installed at the bottom of the second filter screen, the combustion chamber is arranged at the bottom inside the combustion tank, the gas mixing chamber is arranged at the bottom end of the combustion chamber, the gas homogenizing plate is installed at the top end of the gas mixing chamber, the baffle is installed on two sides inside the gas mixing chamber, the gas inlet is formed in the middle of the bottom end of the gas mixing chamber, and the combustion-supporting air inlets are formed in, the igniter is installed on two sides of the middle part of the combustion chamber, the smoke outlet is arranged on the top ends of two sides of the combustion chamber, the steam chamber is arranged on the top part of the combustion chamber, the water replenishing port is arranged on the top end of the left side of the steam chamber, the backflow port is arranged on the top end of the right side of the steam chamber, the steam outlet is arranged on the top end of the steam chamber, the steam conveying pipe is fixedly connected with one end of the steam outlet, the steam turbine is installed on one end of the steam conveying pipe, the generator is installed on one side of the steam turbine, the steam output pipe is fixedly connected with the bottom end of the steam turbine, the condenser is installed on the bottom end of the steam output pipe, the condensate pipe is fixedly connected with the bottom end of the condenser, the support legs are mounted at the bottom of the combustion tank.
Further, the programmable controller is electrically connected with the igniter and the exhaust fan.
Furthermore, the water pump is fixedly connected with the return port through the return pipe.
Furthermore, a heat insulation layer is arranged on the outer side of the interlayer.
Further, the integral structure of the gas mixing chamber is designed to be an inverted frustum.
Further, the first filter screen and the second filter screen are matched for use.
Furthermore, the bottom of first filter screen is provided with the swash plate.
Further, the adjacent baffles are designed in a spaced mode.
Furthermore, a plurality of through holes are formed in the surface of the gas homogenizing plate.
Compared with the prior art, the invention has the beneficial effects that: the blast furnace gas power generation combustion equipment has the advantages that the top end of a blast furnace is fixedly connected with a blast furnace gas conveying pipe, one end of the blast furnace gas conveying pipe is provided with a gravity dust collector, one end of the gravity dust collector is fixedly connected with a primary purified gas conveying pipe, one end of the primary purified gas conveying pipe is provided with a cyclone dust collector, the top end of the cyclone dust collector is fixedly connected with a secondary purified gas conveying pipe, one end of the secondary purified gas conveying pipe is provided with a bag-type dust collector, the gravity dust collector, the cyclone dust collector and the bag-type dust collector are matched for use, the cleaning performance of the blast furnace gas is ensured by the triple purification design, the utilization rate of the blast furnace gas is improved while the follow-up combustion is facilitated; one end of the bag-type dust collector is fixedly connected with a clean gas main pipe, a first branch pipe is arranged at the top end of the clean gas main pipe, a pressure reducing valve group is arranged in the middle of the first branch pipe, a clean gas storage tank is arranged at one end of the first branch pipe, a second branch pipe is arranged at the bottom end of the clean gas main pipe, an equipment body is arranged at one end of the second branch pipe, a combustion tank is arranged at the top of the equipment body, a programmable controller is arranged on the front side of the combustion tank, an interlayer is arranged on the inner side of the combustion tank, and a heat insulation layer is arranged on the outer side of the interlayer, so that the bag-type dust collector is simple in structure, avoids heat loss, improves the utilization rate of smoke generated by gas combustion; the top end of the left side of the interlayer is provided with the smoke extraction pipe, the bottom end of the smoke extraction pipe is provided with the filter, the top end inside the filter is provided with the first filter screen, and the bottom end of the first filter screen is provided with the inclined plate, so that the smoke extraction pipe is simple and practical, the falling of dust is accelerated, the later cleaning frequency is reduced, and the practicability of the filter is improved; the bottom side of the first filter screen is provided with a dust exhaust port, the bottom of the first filter screen is provided with the second filter screen, the first filter screen and the second filter screen are matched for use, and are cooperated with each other, so that smoke generated by gas combustion can be fully filtered, the gas filter is practical and efficient, and secondary pollution is avoided; the exhaust fan is installed at the bottom of the second filter screen, the combustion chamber is arranged at the bottom inside the combustion tank, the gas mixing chamber is arranged at the bottom end of the combustion chamber, the overall structure of the gas mixing chamber is in an inverted frustum design, the volume is gradually increased from bottom to top, the air inflow of mixed gas can be increased, sufficient air supply is ensured, and the ignition rapidness of an igniter is improved; the top end of the gas mixing chamber is provided with the gas homogenizing plate, the surface of the gas homogenizing plate is provided with a plurality of through holes, the gas homogenizing plate is reasonable in layout and uniform in distribution, gas can flow out uniformly, the gas combustion stability is improved, and the combustion effect of the combustion chamber is enhanced; the baffle plates are arranged on two sides in the gas mixing chamber, the adjacent baffle plates are designed at intervals, the baffle plates can play a certain role in blocking gas and combustion-supporting air, the flowing speed of the gas and the combustion-supporting air is reduced, the phenomena of long ignition time and unstable combustion caused by uneven gas mixing are avoided, the gas mixing chamber is simple and practical, the combustion time is saved, the combustion effect is enhanced, the working efficiency of the equipment body is improved, and the combustion cost is reduced; the middle part of the bottom end of the gas mixing chamber is provided with a gas inlet, combustion air inlets are arranged on two sides of the gas inlet, igniters are arranged on two sides of the middle part of the combustion chamber, smoke outlets are arranged on the top ends of two sides of the combustion chamber, a steam chamber is arranged on the top of the combustion chamber, a water replenishing port is arranged on the top end of the left side of the steam chamber, a backflow port is arranged on the top end of the steam chamber, a steam conveying pipe is fixedly connected with one end of each steam outlet, a steam turbine is arranged at one end of the steam conveying pipe, a generator is arranged on one side of the steam turbine, a steam output pipe is fixedly connected with the bottom end of the steam turbine, a condenser is arranged at the bottom end of the steam output pipe, a condensate, the water pump can enable water in the condensate pipe to flow back into the steam chamber again from the return port through the return pipe, the steam chamber is simple and practical, the water resource is recycled, waste is avoided, and meanwhile, the power generation cost of the equipment body is reduced; the stabilizer blade is installed to the bottom of burning jar, and the rubber pad is pasted to the bottom of stabilizer blade, and antiskid is wear-resisting, and is reliable and stable.
Drawings
FIG. 1 is a schematic diagram of a workflow configuration of the present invention;
FIG. 2 is a schematic front view of the present invention;
FIG. 3 is a schematic view of the internal structure of the present invention;
FIG. 4 is a schematic view of the internal structure of the filter of the present invention;
FIG. 5 is a schematic cross-sectional view of a gas mixing chamber of the present invention;
in the reference symbols: 1-an equipment body; 2-blast furnace; 3-blast furnace gas conveying pipe; 4-gravity dust remover; 5-first-stage purified gas conveying pipe; 6-cyclone dust collector; 7-second-stage purified gas delivery pipe; 8-bag dust collector; 9-clean gas main pipe; 10-a first manifold; 11-a pressure reducing valve bank; 12-clean gas storage tank; 13-a second branch; 14-a steam conveying pipe; 15-a steam turbine; 16-a generator; 17-a steam output pipe; 18-a condenser; 19-a condensate pipe; 20-a water pump; 21-a return pipe; 22-a combustion can; 23-a leg; 24-a programmable program controller; 25-an igniter; 26-gas inlet; 27-combustion air inlet; 28-smoke extraction pipe; 29-a filter; 30-water replenishing port; 31-reflux port; 32-a steam outlet; 33-a combustion chamber; 34-a steam chamber; 35-interlayer; 36-a gas mixing chamber; 37-flue gas outlet; 38-an exhaust fan; 39-a first filter screen; 40-a second filter screen; 41-dust exhaust port; 42-a sloping plate; 43-a baffle; 44-gas homogenizing plate; 45-through hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, the present invention provides a technical solution: a blast furnace gas power generation combustion device comprises a device body 1, a blast furnace 2, a blast furnace gas delivery pipe 3, a gravity dust collector 4, a primary purified gas delivery pipe 5, a cyclone dust collector 6, a secondary purified gas delivery pipe 7, a bag-type dust collector 8, a clean gas main pipe 9, a first branch pipe 10, a pressure reducing valve group 11, a clean gas storage tank 12, a second branch pipe 13, a steam delivery pipe 14, a steam turbine 15, a generator 16, a steam output pipe 17, a condenser 18, a condensate pipe 19, a water pump 20, a return pipe 21, a combustion tank 22, a support leg 23, a programmable controller 24, an igniter 25, a gas inlet 26, a combustion-supporting air inlet 27, a smoke extraction pipe 28, a filter 29, a water replenishing port 30, a return port 31, a steam outlet 32, a combustion chamber 33, a combustion chamber 34, an interlayer 35, a gas mixing chamber 36, a smoke outlet 37, an exhaust fan 38, A second filter screen 40, a dust discharge port 41, an inclined plate 42, a baffle 43, a gas homogenizing plate 44 and a through hole 45, wherein the top end of the blast furnace 2 is fixedly connected with a blast furnace gas conveying pipe 3, one end of the blast furnace gas conveying pipe 3 is provided with a gravity dust collector 4, one end of the gravity dust collector 4 is fixedly connected with a primary purified gas conveying pipe 5, one end of the primary purified gas conveying pipe 5 is provided with a cyclone dust collector 6, the top end of the cyclone dust collector 6 is fixedly connected with a secondary purified gas conveying pipe 7, one end of the secondary purified gas conveying pipe 7 is provided with a bag-type dust collector 8, one end of the bag-type dust collector 8 is fixedly connected with a clean gas main pipe 9, the top end of the clean gas main pipe 9 is provided with a first branch pipe 10, the middle part of the first branch pipe 10 is provided with a pressure reducing valve group 11, one end, the equipment body 1 is installed at one end of the second branch pipe 13, the combustion tank 22 is arranged at the top of the equipment body 1, the programmable controller 24 is installed at the front face of the combustion tank 22, the interlayer 35 is arranged at the inner side of the combustion tank 22, the smoke extraction pipe 28 is installed at the top end of the left side of the interlayer 35, the filter 29 is installed at the bottom end of the smoke extraction pipe 28, the first filter screen 39 is installed at the top end inside the filter 29, the dust exhaust port 41 is arranged at the bottom side of the first filter screen 39, the second filter screen 40 is installed at the bottom of the first filter screen 39, the exhaust fan 38 is installed at the bottom of the second filter screen 40, the combustion chamber 33 is arranged at the bottom inside the combustion tank 22, the gas mixing chamber 36 is arranged at the bottom end of the combustion chamber 33, the gas homogenizing plate 44 is installed at the top end of the gas mixing chamber 36, combustion-supporting air inlets 27 are arranged on two sides of the coal gas inlet 26, igniters 25 are arranged on two sides of the middle of the combustion chamber 33, flue gas outlets 37 are arranged on the top ends of two sides of the combustion chamber 33, a steam chamber 34 is arranged on the top of the combustion chamber 33, a water replenishing port 30 is arranged on the top end of the left side of the steam chamber 34, a return port 31 is arranged on the top end of the right side of the steam chamber 34, a steam outlet 32 is arranged on the top end of the steam chamber 34, a steam conveying pipe 14 is fixedly connected with one end of the steam conveying pipe 14, a steam turbine 15 is arranged on one end of the steam conveying pipe 14, a generator 16 is arranged on one side of the steam turbine 15, a steam output pipe 17 is fixedly connected with the bottom end of the steam output pipe 17, a condensate pipe 19 is fixedly connected with the bottom.
Further, the programmable controller 24 electrically connects the igniter 25 and the suction fan 38, and the programmable controller 24 controls the operation of the igniter 25 and the suction fan 38.
Further, water pump 20 and backward flow mouth 31 pass through back flow 21 fixed connection, and water pump 20 can pass through the back flow 21 with the water in the condensate pipe 19 and flow back to steam chamber 34 by backward flow mouth 31 again in, simple and practical realizes the cyclic utilization of water resource, when avoiding extravagant, has also reduced the electricity generation cost of equipment body 1.
Furthermore, the heat preservation layer is arranged on the outer side of the interlayer 35, the structure is simple, heat loss is avoided, the utilization rate of flue gas generated by coal gas combustion is improved, meanwhile, the overhigh external temperature of the equipment body 1 is also prevented, the use safety of the equipment body is improved, and the service life of the equipment body is prolonged.
Further, the overall structure of the gas mixing chamber 36 is designed to be an inverted circular truncated cone, the volume is gradually increased from bottom to top, the air input of the mixed gas can be increased, sufficient air supply is ensured, and the ignition rapidity of the igniter 25 is improved.
Furthermore, the first filter screen 39 and the second filter screen 40 are matched for use, and are cooperated with each other, so that smoke generated by gas combustion can be fully filtered, the gas filter is practical and efficient, and secondary pollution is avoided.
Further, the bottom end of the first filter screen 39 is provided with the inclined plate 42, so that the dust filter is simple and practical, the falling of dust is accelerated, the later cleaning frequency is reduced, and the practicability of the filter 29 is improved.
Further, the design of interval between the adjacent baffle 43, baffle 43 can play certain effect of blockking to coal gas and combustion-supporting air, have reduced their flow velocity, avoid appearing because of the gas mixture is uneven and lead to that the ignition time is long, the unstable phenomenon of burning, simple and practical, when saving burning time, reinforcing combustion effect, also improved the work efficiency of equipment body 1, reduced the combustion cost.
Further, a plurality of through holes 45 have been seted up on even gas board 44's surface, and is rationally distributed, and the distribution is even, and the gas uniform flow of being convenient for has improved gas combustion's stability, has strengthened combustion chamber 33's combustion effect.
The working principle is as follows: when the blast furnace gas power generation and combustion equipment is used, after the blast furnace gas generated from a blast furnace 2 is subjected to triple purification by a gravity dust collector 4, a cyclone dust collector 6 and a bag-type dust collector 8 in sequence, one part of the generated clean gas flows into a clean gas storage tank 12 through a first branch pipe 10 to be stored for other use, the other part of the generated clean gas directly flows into a gas mixing chamber 36 at the bottom of an equipment body 1 through a second branch pipe 13 from a gas inlet 26, is fully mixed with combustion-supporting air under the action of a baffle 43 and then flows into a combustion chamber 33 from a through hole 45 to be combusted, the heat generated by the combustion enables moisture in a steam chamber 34 to be evaporated, the steam enters a steam turbine 15 from a steam outlet 32 through a steam conveying pipe 14, the heat energy is immediately converted into mechanical energy, the mechanical energy drives a generator 16 to generate power, the steam leaked in the steam turbine 15 enters a condenser 18 from a steam output pipe 17, water in condensate pipe 19 flows to steam chamber 34 again in by backward flow mouth 31 through back flow pipe 21 under water pump 20's effect and recycles, the flue gas that the burning produced gets into intermediate layer 35 by exhanst gas outlet 37 and preheats and further heats the back to steam chamber 34, finally enter into filter 29 by smoke extraction pipe 28 under the effect of air exhauster 38 in discharge to the air after the double filtration of first filter screen 39 and second filter screen 40, this kind of blast furnace gas power generation combustion equipment, not only easy operation, high durability and convenient use, and is reliable and stable, safety and practical, energy-concerving and environment-protective, the generating efficiency is high, the combustion effect is good, low in working cost, long service life, resource utilization is high.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.