CN201615601U - Rice husk powder combustion hot-blast stove - Google Patents

Abstract

The utility model discloses a rice husk powder combustion hot-blast stove, which relates to a hot-blast stove and aims at the problems that fuels cannot be burned out, exhausted flue gas cannot meet the national standard and the environment is polluted in the current biomass hot-blast stove during use. A combustion-supporting air inlet is arranged at the bottom of a combustion chamber; a combustion-supporting gate is arranged on the combustion-supporting air inlet; the other end of a discharge pipe passes through the combustion-supporting air inlet and is arranged in the combustion chamber; two ends of an upper arc and two side walls of the combustion chamber are bricked into a whole; two ends of a lower arc and the two side walls of the combustion chamber are bricked into a whole; a fuel diffusion spray nozzle is arranged in the combustion chamber of the upper arc; a shell and tube heat exchanger and a hot gas blower are arranged in a second-stage settling chamber; a flue is arranged at the bottom of the shell and tube heat exchanger and is communicated with a chimney through a flue leading blower; a stove body is provided with a plurality of ash scooping gates; and two ash scooping gates are respectively arranged in the positions, which correspond to the first-stage settling chamber and the second-stage settling chamber, on the side wall of the stove body. The utility model is used for supplying heat by hot air.

Description

A kind of powdered rice hulls combustion heat wind furnace

Technical field

The utility model relates to a kind of hot-blast stove.

Background technology

There is fuel after-flame fully in use in the biomass thermal wind furnace at present, and the discharging flue gas does not meet national standard, causes environmental pollution problems.

The utility model content

The purpose of this utility model provides a kind of powdered rice hulls combustion heat wind furnace, has fuel after-flame fully in use to solve present biomass thermal wind furnace, and the discharging flue gas does not meet national standard, causes environmental pollution problems.

The utility model is to solve the problems of the technologies described above the technical scheme of taking to be: described hot-blast stove comprises body of heater, a plurality of doors of scratching in the ashes, tubular heat exchanger, smoke suction machine, chimney, combustion-supporting door, flue, feeding hopper, motor, the feed screw feeder, material receiving tube, high pressure is inhaled the feed blower fan, discharge nozzle, fuel divergent nozzle and air-heater, the output shaft of described motor and feed screw feeder are in transmission connection, described feed screw feeder is contained in the bottom in the feeding hopper, the outlet of described feeding hopper is connected with an end of material receiving tube, the other end of described material receiving tube is connected with the suction feed import that high pressure is inhaled the feed blower fan, the suction feed outlet that described high pressure is inhaled the feed blower fan is connected with an end of discharge nozzle, the other end of described discharge nozzle is connected with the fuel divergent nozzle, described hot-blast stove also comprises arc arch and arc arch down, interior the building by laying bricks or stones successively from front to back by first refractory brickwork and second refractory brickwork of described body of heater is divided into the combustion chamber, first order expansion chamber and second level expansion chamber, the bottom of described combustion chamber is provided with combustion air inlet, described combustion air inlet is provided with combustion-supporting door, the other end of described discharge nozzle passes combustion air inlet and is located in the combustion chamber, be provided with arc arch and arc arch down in the described combustion chamber, the two ends of described arc arch and the two side of combustion chamber are built by laying bricks or stones and are integral, the two ends that described arc encircles down and the two side of combustion chamber are built by laying bricks or stones and are integral, described arc arch is positioned at the top of arch under the arc, described fuel divergent nozzle is located in the combustion chamber of arch under the arc, form the first flue gas communication port between the lower surface of described first refractory brickwork and the bottom of body of heater, form the second flue gas communication port between the upper surface of described second refractory brickwork and the top of body of heater, be provided with tubular heat exchanger and air-heater in the expansion chamber of the described second level, described air-heater is arranged on the top of tubular heat exchanger and is connected with it, the bottom of described tubular heat exchanger is provided with flue, described flue is communicated with chimney by smoke suction machine, be provided with a plurality of doors of scratching in the ashes with combustion chamber opposite position place on the described side wall of furnace, respectively be provided with the door of scratching in the ashes with first order expansion chamber and expansion chamber opposite position place, the second level on the described side wall of furnace.

The utlity model has following beneficial effect: the utility model powdered rice hulls is sprayed into by fuel divergent nozzle 20 by high pressure suction feed blower fan 18 suction backs and carries out suspension combustion in the combustion chamber 1; Powdered rice hulls is under the effect of smoke suction machine 7, and flame is the rising state, and powdered rice hulls is fully burned in arc arch 11, and combustion air is entered by combustion air inlet 3, helps powdered rice hulls fully to fire only in arc 11 spaces that arch up; The setting of first order expansion chamber 4 and second level expansion chamber 5 is used for prolonging the burning time of powdered rice hulls and can precipitates the interior dust of flue gas preferably in the body of heater simultaneously, makes emission of smoke tallies national standard of the present utility model, the protection environment.

Description of drawings

Fig. 1 is a structural representation of the present utility model, and Fig. 2 is the A-A cutaway view of Fig. 1.

The specific embodiment

The specific embodiment one: present embodiment is described in conjunction with Fig. 1 and Fig. 2, the hot-blast stove of present embodiment comprises body of heater, a plurality of doors 2 of scratching in the ashes, tubular heat exchanger 6, smoke suction machine 7, chimney 8, combustion-supporting door 9, flue 13, feeding hopper 14, motor 15, feed screw feeder 16, material receiving tube 17, high pressure is inhaled feed blower fan 18, discharge nozzle 19, fuel divergent nozzle 20 and air-heater 25, the output shaft of described motor 15 and feed screw feeder 16 are in transmission connection, described feed screw feeder 16 is contained in the bottom in the feeding hopper 14, the outlet of described feeding hopper 14 is connected with an end of material receiving tube 17, the other end of described material receiving tube 17 is connected with the suction feed import that high pressure is inhaled feed blower fan 18, the suction feed outlet that described high pressure is inhaled feed blower fan 18 is connected with an end of discharge nozzle 19, the other end of described discharge nozzle 19 is connected with fuel divergent nozzle 20, described hot-blast stove also comprises arc arch 11 and arc arch 12 down, interior the building by laying bricks or stones successively from front to back by first refractory brickwork 21 and second refractory brickwork 22 of described body of heater is divided into combustion chamber 1, first order expansion chamber 4 and second level expansion chamber 5, the bottom of described combustion chamber 1 is provided with combustion air inlet 3, described combustion air inlet 3 is provided with combustion-supporting door 9, the other end of described discharge nozzle 19 passes combustion air inlet 3 and is located in the combustion chamber 1, be provided with arc arch 11 and arc arch 12 down in the described combustion chamber 1, the two ends of described arc arch 11 and the two side of combustion chamber 1 are built by laying bricks or stones and are integral, the two side of the two ends of arch 12 and combustion chamber 1 is built by laying bricks or stones and is integral under the described arc, described arc arch 11 is positioned at the top of arch 12 under the arc, described fuel divergent nozzle 20 is located in the combustion chamber 1 of arch 12 under the arc, form the first flue gas communication port 23 between the lower surface of described first refractory brickwork 21 and the bottom of body of heater, form the second flue gas communication port 24 between the upper surface of described second refractory brickwork 22 and the top of body of heater, be provided with tubular heat exchanger 6 and air-heater 25 in the described second level expansion chamber 5, described air-heater 25 is arranged on the top of tubular heat exchanger 6 and is connected with it, the bottom of described tubular heat exchanger 6 is provided with flue 13, described flue 13 is communicated with chimney 8 by smoke suction machine 7, arc arch 11 and the zone between the arc arch 12 corresponding on the described side wall of furnace are provided with a plurality of doors 2 of scratching in the ashes, and respectively are provided with the door 2 of scratching in the ashes with first order expansion chamber 4 and second level expansion chamber 5 opposite position places on the described side wall of furnace.

Heating load of the present utility model can reach 60-360 ten thousand kilocalories/hour, the thermal efficiency is 65-70%; Wherein fuel powdered rice hulls mass density is 100-135kg/m ³, moisture accounts for 9-14% in the powdered rice hulls, and intrinsic charcoal composition accounts for 16-18%, and volatile substance accounts for 56-68%, and ash content accounts for 18-21%, and the calorific value of powdered rice hulls is 3340-3580kcal, and the heat of 2kg powdered rice hulls is equivalent to the heat of 1kg coal; Powdered rice hulls also has the characteristics of vaporized fuel: the little and epigranular of granularity, and the combustion reaction surface is bigger, the air distributed uniform; Powdered rice hulls silicon sintering machinery intensity height can keep profile after the vaporization, and not easily broken have certain heat endurance; A little less than the glutinous burning property, be difficult for coking damage inboard wall of furnace body in body of heater, slag tap easily.

The utility model is energy-conservation, economic and practical; Its burning fee is low, be equivalent to coal 1/3, diesel oil 1/7, power consumption is 1/3 of a general hot-blast stove, the body of heater low cost of manufacture is equivalent to 1/2 of ordinary hot wind furnace; Powdered rice hulls is a kind of effective way that relaxes energy contradiction as drying source.Powdered rice hulls be rice a processing waste, cheap, unit price is 1/6 of a coal, 1/2 of diesel oil, and calorific value be equivalent to coal 1/2, diesel oil 1/3, be the propagable fuel of a kind of cheapness so compare with conventional energy resource.

The specific embodiment two: in conjunction with Fig. 1 present embodiment is described, the hot-blast stove of present embodiment also comprises secondary air register 10, and described secondary air register 10 is located on the front wall of body of heater.Combustion case according to the powdered rice hulls in the combustion chamber 1 is regulated combustion air volume by the switch secondary air register.Other composition and annexation are identical with the specific embodiment one.

Operation principle: powdered rice hulls is inserted into feeding hopper 14, starter motor 1, the output shaft of motor 1 is given feed screw feeder 16 with transmission of power, after feed screw feeder 16 stirs powdered rice hulls in feeding hopper 14, powdered rice hulls is inhaled 18 suctions of feed blower fan by high pressure and is sprayed into to combustion chamber 1 by fuel divergent nozzle 20, powdered rice hulls is lighted, powdered rice hulls carries out suspension combustion in combustion chamber 1, under the effect of smoke suction machine 7, the powdered rice hulls combustion flame is the rising state, make powdered rice hulls in fully burning between the arch 12 under arc arch 11 and the arc, combustion air is entered by combustion air inlet 3 simultaneously, and fully combustion is clean in arc arches up 11 spaces to help powdered rice hulls; Remaining ashes after powdered rice hulls has burnt can be got rid of its ashes by the door 2 of scratching in the ashes.The temperature of flue gas can reach 600-700 degree centigrade in the body of heater, flue gas from the combustion chamber 1 come out the back enter first order expansion chamber 4 by the first flue gas communication port 23, in first order expansion chamber 4, carry out the dust post precipitation and enter second level expansion chamber 5 through the second flue gas communication port 24, in second level expansion chamber 5, carry out the dust post precipitation and enter tubular heat exchanger 6, be used for heating by air-heater 25 inhaled airs, enter chimney 8 rows afterwards to the external world, wherein air carries out exporting hot blast by exchanging air after the heat exchange in tubular heat exchanger 6, temperature can reach 200-250 degree centigrade, can be used as drying source.

Claims (2)

1. powdered rice hulls combustion heat wind furnace, described hot-blast stove comprises body of heater, a plurality of doors (2) of scratching in the ashes, tubular heat exchanger (6), smoke suction machine (7), chimney (8), combustion-supporting door (9), flue (13), feeding hopper (14), motor (15), feed screw feeder (16), material receiving tube (17), high pressure is inhaled feed blower fan (18), discharge nozzle (19), fuel divergent nozzle (20) and air-heater (25), the output shaft of described motor (15) and feed screw feeder (16) are in transmission connection, described feed screw feeder (16) is contained in the bottom in the feeding hopper (14), the outlet of described feeding hopper (14) is connected with an end of material receiving tube (17), the other end of described material receiving tube (17) is connected with the suction feed import that high pressure is inhaled feed blower fan (18), the suction feed outlet that described high pressure is inhaled feed blower fan (18) is connected with an end of discharge nozzle (19), the other end of described discharge nozzle (19) is connected with fuel divergent nozzle (20), it is characterized in that described hot-blast stove also comprises arc arch (11) and arc arch (12) down, interior the building by laying bricks or stones successively from front to back by first refractory brickwork (21) and second refractory brickwork (22) of described body of heater is divided into combustion chamber (1), first order expansion chamber (4) and second level expansion chamber (5), the bottom of described combustion chamber (1) is provided with combustion air inlet (3), described combustion air inlet (3) is provided with combustion-supporting door (9), the other end of described discharge nozzle (19) passes combustion air inlet (3) and is located in the combustion chamber (1), be provided with arc arch (11) and arc arch (12) down in the described combustion chamber (1), the two ends of described arc arch (11) and the two side of combustion chamber (1) are built by laying bricks or stones and are integral, the two side of the two ends of arch (12) and combustion chamber (1) is built by laying bricks or stones and is integral under the described arc, described arc arch (11) is positioned at the top of arch (12) under the arc, described fuel divergent nozzle (20) is located in the combustion chamber (1) of arch (12) under the arc, form the first flue gas communication port (23) between the lower surface of described first refractory brickwork (21) and the bottom of body of heater, form the second flue gas communication port (24) between the upper surface of described second refractory brickwork (22) and the top of body of heater, be provided with tubular heat exchanger (6) and air-heater (25) in the described second level expansion chamber (5), described air-heater (25) is arranged on the top of tubular heat exchanger (6) and is connected with it, the bottom of described tubular heat exchanger (6) is provided with flue (13), described flue (13) is communicated with chimney (8) by smoke suction machine (7), arc arch (11) and the zone between the arc arch (12) corresponding on the described side wall of furnace are provided with a plurality of doors (2) of scratching in the ashes, and respectively are provided with the door (2) of scratching in the ashes with first order expansion chamber (4) and second level expansion chamber (5) opposite position place on the described side wall of furnace.

2. according to the described a kind of powdered rice hulls combustion heat wind furnace of claim 1, it is characterized in that described hot-blast stove also comprises secondary air register (10), described secondary air register (10) is located on the front wall of body of heater.

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