CN209957703U - Multi-return-stroke biomass solid gas preparation system with waste heat utilization function - Google Patents

Abstract

The utility model relates to a living beings solid gas preparation equipment. The system for preparing the multi-return biomass solid fuel gas with the waste heat utilization function is characterized by comprising a multi-return biomass solid fuel gas cracking purification furnace, a heat exchanger, a cold water pipe and a hot water pipe; the multi-return stroke biomass solid fuel gas cracking and purifying furnace comprises a furnace body, a spiral feeder, a blanking hopper, a front carrier roller, an annular driven gear, a rear carrier roller, a cyclone cylinder, a multi-return stroke rotating body, a main motor, a waste heat recovery pipe and a burner; the rear part of the multi-return-stroke rotating body is placed on the rear carrier roller; an annular driven gear is fixed on the outer wall of the front part of the multi-return-stroke rotating body; the discharge port of the discharge hopper is communicated with the feed port of the screw feeder, and the discharge port of the screw feeder is positioned in the feed port of the first rotary body of the multi-return-stroke rotary body; the hot flue gas chamber is communicated with a combustion chamber of the combustor; the multi-return-stroke rotating body comprises 2-3 rotating bodies. The system has the characteristics of full utilization of heat energy and utilization of waste heat to generate hot water.

Description

Multi-return-stroke biomass solid gas preparation system with waste heat utilization function

Technical Field

The utility model relates to a living beings solid gas preparation equipment, concretely relates to many return strokes living beings solid gas preparation system with waste heat utilization function.

Background

The biomass fuel can not only solve the problem of air pollution caused by straw burning, but also can replace fossil energy. At present, two methods are mainly adopted for biomass fuel production. The first is a physical method: the components of the biomass cannot be changed, and the biomass is mostly briquettes (particles); the disadvantages are that: the heat medium is difficult to meet the use requirement of an industrial boiler, and the boiler is easy to coke and damage as the result of burning polluted air in the field. The second is to process and produce biomass gas or liquid fuel, but need special pipeline or special transport vechicle, just can transport the fuel for the user, even the gas transports for the user, but a lot of customers do not have the fire control safe in service condition yet, use cost is high, and the low price/performance ratio of biomass heat conversion efficiency is low on the one hand simultaneously, and the feasibility is poor.

At present, a single-pass biomass solid gas cracking and purifying furnace (or called biomass solid gas carbonization system) has the following defects: 1. the heat energy generated by the combustion chamber is not fully utilized. 2. The waste hot gas generated by the combustion chamber is directly conveyed to the drying furnace, and the waste hot gas (waste heat) is not used for multiple purposes (for example, heat exchange is used for heating water to generate hot water).

Disclosure of Invention

An object of the utility model is to provide a many return strokes living beings solid gas preparation system with waste heat utilization function, this system have the heat energy utilize abundant, can effectively reduce the length of the solid of revolution, the hydrothermal characteristics of usable used heat production.

In order to achieve the purpose, the utility model adopts the technical proposal that: the system for preparing the multi-return biomass solid fuel gas with the waste heat utilization function is characterized by comprising a multi-return biomass solid fuel gas cracking purification furnace, a heat exchanger, a cold water pipe and a hot water pipe;

the multi-return stroke biomass solid fuel gas cracking and purifying furnace comprises a furnace body, a spiral feeder, a blanking hopper, a front carrier roller, an annular driven gear, a rear carrier roller, a cyclone cylinder, a multi-return stroke rotating body, a main motor, a waste heat recovery pipe and a burner; the left side and the right side of the front part of the furnace body are respectively provided with a front carrier roller, the left side and the right side of the rear part of the furnace body are respectively provided with a rear carrier roller, the front part of the multi-return-stroke rotating body is placed on the front carrier roller, and the rear part of the multi-return-stroke rotating body is placed on the rear carrier roller; an annular driven gear is fixed on the outer wall of the front part of the multi-return-stroke rotating body, a main motor is arranged on the furnace body, a driving gear is arranged on an output shaft of the main motor, and the driving gear is meshed with the driven gear; the spiral feeder and the discharging hopper are respectively and fixedly arranged on the furnace body, the discharging hopper is positioned above the front part of the spiral feeder, the discharging port of the discharging hopper is communicated with the feeding port of the spiral feeder, and the discharging port of the spiral feeder is positioned in the feeding port of the first revolving body of the multi-return-stroke revolving body; the hot flue gas chamber is communicated with a combustion chamber of the combustor, the hot flue gas chamber is arranged on the furnace body, and the hot flue gas chamber is positioned on the outer side of the multi-return-stroke rotating body; the hot flue gas chamber is provided with a waste hot gas outlet which is communicated with a waste heat recovery pipe;

the multi-return-stroke rotating body comprises 2-3 rotating bodies, a second rotating body is positioned outside a first rotating body and fixedly connected with the first rotating body, a first channel is arranged in the first rotating body, a second channel is arranged in the second rotating body, the front end of the first channel is a feeding hole, the rear end of the first channel is a closed end, the rear end of the first rotating body is provided with a first blanking hole, the first channel is communicated with the second channel through the first blanking hole, and the front end of the second rotating body is provided with a second blanking hole; a first material guide plate is arranged in the first revolving body, the first material guide plate is inclined backwards, a second material guide plate is arranged in the second revolving body, and the second material guide plate is inclined forwards;

when 2 revolving bodies are adopted, a discharge port is arranged on the furnace body below the second blanking port, an annular groove is arranged on the furnace body at the second blanking port, and the discharge port is positioned in the annular groove;

when 3 revolving bodies are adopted, the third revolving body is positioned outside the second revolving body and fixedly connected with the second revolving body, a third channel is arranged in the third revolving body, a second blanking port is positioned in the third channel, the second channel is communicated with the third channel through the second blanking port, a third material guide plate is arranged in the third revolving body, and the third material guide plate is inclined backwards; a third blanking port is arranged at the rear end of the third revolving body, a discharge port is arranged on the furnace body below the third blanking port, an annular groove is arranged on the furnace body at the third blanking port, and the discharge port is positioned in the annular groove;

a cyclone cylinder is arranged on the furnace body above the discharge port;

the waste heat recovery pipe consists of a first waste heat recovery pipe and a second waste heat recovery pipe, one end of the first waste heat recovery pipe is communicated with the waste hot gas outlet, the other end of the first waste heat recovery pipe is connected with the first medium inlet of the heat exchanger, one end of the second waste heat recovery pipe is connected with the first medium outlet of the heat exchanger, and the other end of the second waste heat recovery pipe is communicated with the hot gas inlet of the drying furnace; the cold water pipe is connected with a second medium inlet of the heat exchanger, and the hot water pipe is connected with a second medium outlet of the heat exchanger.

The spiral feeder comprises a cylinder, a spiral feeding rod, spiral blades and a feeding motor, wherein the rear end of the cylinder is a discharging end, the upper end of the front part of the cylinder is provided with a feeding port, the spiral feeding rod is provided with the spiral blades, the spiral feeding rod and the spiral blades are positioned in the cylinder, the feeding motor is positioned on the front side of the cylinder, and a shaft of the feeding motor is connected with the front end part of the spiral feeding rod through a coupler; the rear end of the cylinder is inserted into a feed inlet of a first revolving body of the revolving body with multiple return strokes; the barrel and the feeding motor are fixedly arranged on the furnace body.

The multi-pass biomass solid gas preparation system further comprises a combustible smoke recovery pipe, a cyclone dust collector, a combustible smoke induced draft fan and a combustible smoke pipe; one end of the combustible smoke recycling pipe is communicated with a cyclone cylinder on the furnace body, the other end of the combustible smoke recycling pipe is communicated with an inlet of a cyclone dust collector, an outlet of the cyclone dust collector is communicated with a burner of the burner through a combustible smoke pipe, and a combustible smoke induced draft fan is arranged on the combustible smoke pipe.

The beneficial effects of the utility model reside in that:

1. 2-3 revolving bodies (multi-return passage) are adopted, biomass raw materials in the first passage are preheated, biomass raw materials in the outer passage (the second passage and the third passage) are cracked into biomass solid fuel gas, heat energy generated by the combustor is fully utilized, and the biomass solid fuel gas burner has the characteristic of low energy consumption. The first channel (i.e. the inner channel) is used for feeding the raw material and preheating the raw material, so that the length of the revolving body can be effectively reduced.

2. The waste heat recovery pipe is provided with a heat exchanger, and cold water enters the waste heat recovery pipe and then is subjected to heat exchange to generate hot water, so that the waste heat recovery pipe can be used for bathing of workers and the like and can generate hot water by using waste heat.

Drawings

Fig. 1 is a schematic structural diagram of the multi-pass biomass solid gas preparation system with the waste heat utilization function of the present invention.

Fig. 2 is a schematic structural diagram of a multi-return biomass solid gas cracking and purifying furnace of embodiment 1(2 revolving bodies) of the present invention.

Fig. 3 is a sectional view taken along line a-a of fig. 2.

Fig. 4 is a sectional view taken along line B-B of fig. 3.

Fig. 5 is a schematic perspective view of a multi-cycle biomass solid gas cracking and purifying furnace according to embodiment 1 of the present invention.

Fig. 6 is a schematic diagram of embodiment 1 of the present invention.

Fig. 7 is a schematic structural diagram of a multi-cycle biomass solid gas cracking and purifying furnace in embodiment 2 (when 3 revolving bodies) of the present invention.

Fig. 8 is a sectional view taken along line C-C of fig. 7.

Fig. 9 is a cross-sectional view taken along line D-D of fig. 8.

Fig. 10 is a schematic structural view of a spiral blanking pipe in the multi-return biomass solid gas cracking and purifying furnace according to embodiment 1 of the present invention.

In the figure: 1-a multi-return-stroke biomass solid gas cracking purification furnace, 2-a combustible smoke recovery pipe, 3-a cyclone dust collector, 4-a combustible smoke induced draft fan, 5-a combustible smoke pipe, 6-a burner, 7-a burner, 8-a combustion chamber, 9-a first waste heat recovery pipe, 10-a cold water pipe, 11-a heat exchanger, 12-a hot water pipe, 13-a second waste heat recovery pipe, 14-a drying furnace, 15-a first conveyor, 16-a transition bin, 17-a cyclone dust collector, 18-a pipeline, 19-an induced draft fan, 20-a spray tower, 21-a biomass raw material feeding port, 22-a spiral feeder, 23-a feeding motor, 24-a discharging hopper, 25-a water-cooling spiral machine, 26-a front supporting roller and 27-an annular driven gear, 28-rear carrier roller, 29-maintenance frame, 30-cyclone, 31-gas-material separator, 32-second revolving body, 33-first material guide plate, 34-first revolving body, 35-first channel, 36-waste hot gas outlet, 37-first blanking port, 38-second channel, 39-second material guide plate, 40-discharge port, 41-main motor, 42-air-closed pneumatic feed valve, 43-protective cover, 44-spiral blanking pipe, 45-second blanking port, 46-third revolving body, 47-third channel, 48-third material guide plate, 49-third blanking port, 50-hot flue gas chamber, 51-barrel.

Detailed Description

For a better understanding of the present invention, the present invention will be further described with reference to the following embodiments, which are not intended to be limiting.

Example 1

As shown in fig. 1 to 6, the multi-pass biomass solid fuel gas preparation system with waste heat utilization function includes a multi-pass biomass solid fuel gas cracking and purifying furnace, a heat exchanger 11, a cold water pipe 10, and a hot water pipe 12;

the multi-return biomass solid fuel gas cracking and purifying furnace comprises a furnace body, a spiral feeder 22, a blanking hopper 24, a front carrier roller 26, an annular driven gear 27, a rear carrier roller 28, a cyclone cylinder 30, a multi-return rotary body, a main motor 41, a waste heat recovery pipe and a burner 6 (in figure 3, the right side is front, and the left side is rear); the left side and the right side of the front part of the furnace body (or called a furnace frame) are respectively provided with a front carrier roller 26 (used for supporting the multi-return rotator), the left side and the right side of the rear part of the furnace body are respectively provided with a rear carrier roller 28 (used for supporting the multi-return rotator), the front part of the multi-return rotator is placed on the front carrier roller 26, the rear part of the multi-return rotator is placed on the rear carrier roller 28 (namely the multi-return rotator can rotate, press wheels are respectively arranged above the left side and the right side of the front part of the multi-return rotator, and the press wheels are respectively arranged above the left side and the right side of the rear part of the; an annular driven gear 27 is fixed on the outer wall of the front part of the multi-return-stroke rotating body, a main motor 41 is arranged on the furnace body, a driving gear is arranged on an output shaft of the main motor 41, and the driving gear is meshed with the driven gear 27 (the main motor rotates to drive the multi-return-stroke rotating body to rotate); the screw feeder 22 and the lower hopper 24 are respectively and fixedly arranged on the furnace body, the lower hopper 24 is positioned above the front part of the screw feeder 2, the discharge port of the lower hopper 24 is communicated with the feed port of the screw feeder 2 (the lower hopper 24 is provided with an air-closed pneumatic feed valve 42), and the discharge port of the screw feeder 2 is positioned in the feed port of the first revolving body 34 of the multi-return revolving body (the screw feeder 2 is not contacted with the first revolving body 34); the hot flue gas chamber 50 is communicated with the combustion chamber 8 of the combustor 6 { the hot flue gas generated by the combustor 6 enters the combustion chamber 8, then is mixed with pyrolysis gas (pyrolysis gas sent by the combustible flue gas recovery pipe 2 and the combustible flue pipe 5, or called combustible flue gas) for combustion again, and the generated hot flue gas enters the hot flue gas chamber 50 to provide a heat source for raw materials (to heat the materials), and then is discharged through the waste heat recovery pipe (the first waste heat recovery pipe 9); due to the utilization of the pyrolysis gas, the combustion of the combustor 6 is reduced; after the furnace is started to work for a period of time, a heat source (enters a combustion chamber for combustion) is mostly extracted by utilizing pyrolysis gas, a hot flue gas chamber 50 is arranged on the furnace body, and the hot flue gas chamber 50 is positioned on the outer side of the multi-return-stroke rotating body (the hot flue gas chamber 50 is not in contact with the multi-return-stroke rotating body, namely the hot flue gas chamber 50 does not rotate along with the multi-return-stroke rotating body); the hot flue gas chamber 50 is provided with a waste hot gas outlet 36, and the waste hot gas outlet 36 is communicated with a waste heat recovery pipe;

the multi-return-stroke rotating body comprises 2-3 rotating bodies (2-3 passages are arranged in the multi-return-stroke rotating body, namely, multiple return strokes), the second rotating body 32 is positioned outside the first rotating body 34 (the second rotating body 32 wraps the first rotating body 34), the second rotating body 32 is fixedly connected with the first rotating body 34, a first passage 35 is arranged in the first rotating body 34, a second passage 38 is arranged in the second rotating body 32 (the second passage 38 is positioned outside the first passage 35), the front end of the first passage 35 is a feeding hole, the rear end of the first passage 35 is a closed end, a first blanking hole 37 is arranged at the rear end part of the first rotating body 34, the first passage 35 is communicated with the second passage 38 through the first blanking hole 37 (the front end and the rear end of the second passage are both closed ends), and a second blanking hole is arranged at the front end part of the second rotating body 32 (the second blanking hole is positioned in the second passage); a first material guide plate 33 is arranged in the first revolving body 34, the first material guide plate 33 inclines backwards (the first material guide plate pushes the materials to move backwards), a second material guide plate 39 is arranged in the second revolving body 32, and the second material guide plate 39 inclines forwards (the second material guide plate 39 pushes the materials to move forwards); when 2 revolving bodies are adopted, a discharge port 40 is arranged on the furnace body below the second blanking port, an annular groove (for containing materials) is arranged on the furnace body at the second blanking port, and a discharge port 4 is positioned in the annular groove (the materials of the second revolving body 32 fall from the second blanking port to enter the annular groove and are discharged from the discharge port 40 in the annular groove);

when 3 revolving bodies are adopted, the third revolving body 46 is positioned outside the second revolving body 32 (the third revolving body 46 wraps the second revolving body 32, the third channel 47 is positioned outside the second channel 38), the third revolving body 46 is fixedly connected with the second revolving body 32, the third revolving body 46 is internally provided with the third channel 47 (the front end and the rear end of the third channel are both closed ends), the second blanking port 45 is positioned in the third channel 47, the second channel 38 is communicated with the third channel 47 through the second blanking port 45, the third revolving body 46 is internally provided with a third material guide plate 48, and the third material guide plate 48 inclines backwards (the third material guide plate pushes the material to move backwards); a third blanking port 49 is arranged at the rear end of the third revolving body 46, a discharge port 40 is arranged on the furnace body below the third blanking port 49, an annular groove (for containing materials) is arranged on the furnace body at the third blanking port, and a discharge port 4 is positioned in the annular groove (the materials of the third revolving body 46 fall from the third blanking port and are discharged from the discharge port 40);

a cyclone 30 (or called cracking gas collecting cover) is arranged on the furnace body above the discharge port 40, wherein gas, water and particle materials escaping from the discharge port are collected by the cyclone, then are subjected to gas-material separation, then can be subjected to gas-water separation, and a liquid-gas separator is additionally arranged);

the waste heat recovery pipe consists of a first waste heat recovery pipe 9 and a second waste heat recovery pipe 13, one end of the first waste heat recovery pipe 9 is communicated with a waste hot gas outlet 36, the other end of the first waste heat recovery pipe 9 is connected with a first medium inlet of the heat exchanger 11, one end of the second waste heat recovery pipe 13 is connected with a first medium outlet of the heat exchanger 11, and the other end of the second waste heat recovery pipe 13 is communicated with a hot gas inlet of the drying furnace 14 (gas with a certain temperature is provided for the drying furnace, and energy is saved); the cold water pipe 10 is connected to a second medium inlet of the heat exchanger 11, and the hot water pipe 12 is connected to a second medium outlet of the heat exchanger 11 (when cold water enters, heat exchange is performed to generate hot water, which can be used for bathing by workers, etc.).

A gas-material separator 31 is arranged in the cyclone cylinder; the gas-material separator 31 comprises a front baffle and a rear baffle, the number of the front baffle and the number of the rear baffle are respectively 1-4, the front baffle and the rear baffle are respectively fixed on the inner wall of the cyclone, and the front baffle and the rear baffle are mutually crossed (a snake-shaped channel is formed in the cyclone).

As shown in fig. 10, the multi-pass rotating body is 3 rotating bodies, the third blanking port 49 is communicated with the inlet of the spiral blanking pipe 44, the spiral blanking pipe 44 is spirally wound on the outer wall of the third rotating body 46, and the spiral blanking pipe 44 is fixedly connected with the third rotating body 46; a discharge port 40 is arranged on the furnace body below the spiral blanking pipe 44. The discharge port 40 communicates with the inlet of the water-cooled screw (conveyor, conveying device) 25.

The water-cooled screw machine is connected with a feed inlet of the mill (the feed inlet of the conveying device is positioned below the discharge port 40 or communicated with the discharge port of the conveying device; and the discharge hole of the mill is connected (communicated) with the feeding hole of the second dust removal system. The second dust removal system comprises a cyclone dust collector (or called cyclone dust collector) and a pulse bag dust collector (or called pulse bag dust collector); the material inlet of the cyclone dust collector is connected (communicated) with the material outlet of the mill, the material outlet of the cyclone dust collector is connected (communicated) with the material inlet of the pulse bag-type dust collector, the material outlet of the pulse bag-type dust collector is connected (communicated) with the finished product warehouse by a material grinding conveyor (or called mill material outlet conveyor), a material charging and packaging machine is arranged outside the finished product warehouse for packaging biomass solid fuel gas products, the material charging and packaging machine can also be arranged at the material outlet of the pulse bag-type dust collector, and a dust outlet of the pulse bag-type dust collector is communicated with a dust collection.

The spiral feeder 22 comprises a cylinder body (body) 51, a spiral feeding rod, spiral blades and a feeding motor 23, wherein the rear end of the cylinder body is a discharging end (the front end of the cylinder body is provided with a shaft penetrating hole of the feeding motor), the upper end of the front part of the cylinder body is provided with a feeding hole, the spiral feeding rod is provided with the spiral blades, the spiral feeding rod and the spiral blades are positioned in the cylinder body, the feeding motor 23 is positioned at the front side of the cylinder body, the shaft of the feeding motor 23 is connected with the front end part of the spiral feeding rod through a coupler (the spiral feeding rod is driven by the rotation of the feeding motor, and the spiral blades push raw materials to be pushed into a first channel in a multi-return-; the rear end of the cylinder is inserted into the feed port of the first rotator 34 of the multi-turn rotator (there is a gap between the rear end of the cylinder and the multi-turn rotator, and the multi-turn rotator does not affect the rotation of the multi-turn rotator); the barrel and the feeding motor 23 are fixedly arranged on the furnace body (the feeding motor 23 can also be fixedly arranged on the barrel).

The multi-pass biomass solid gas preparation system further comprises a combustible smoke recovery pipe 2, a cyclone dust collector 3, a combustible smoke induced draft fan 4 and a combustible smoke pipe 5; one end of the combustible smoke recycling pipe 2 is communicated with a cyclone cylinder 30 on the furnace body, the other end of the combustible smoke recycling pipe 2 is communicated with an inlet of a cyclone dust collector 3, an outlet of the cyclone dust collector 3 is communicated with a burner 7 of a burner 6 through a combustible smoke pipe 5, and a combustible smoke induced draft fan 4 is arranged on the combustible smoke pipe 5. Combustible flue gas generated by the multi-pass biomass solid gas cracking purification furnace 1 enters the cyclone dust collector 3 for dust removal, and is pumped into the combustor 7 of the combustor 6 by the combustible flue gas induced draft fan 4 for combustion in the combustion chamber 8.

The furnace body is provided with an overhaul frame 29 and a protective cover 43.

As shown in fig. 1, the multi-return biomass solid fuel gas cracking and purifying system includes a multi-return biomass solid fuel gas cracking and purifying furnace (temperature can be 200-; a discharging hopper (a feeding port) 24 and a discharging port 40 are arranged on the furnace body of the multi-pass biomass solid fuel gas cracking purification furnace 1; a biomass raw material feeding port 21 is arranged on the drying furnace 14, a discharge port of the drying furnace 14 is connected with a feeding port of the transition bin 16 by a first conveyor 15 (the dried biomass raw material is conveyed into the transition bin by the first conveyor, and the transition bin is arranged to ensure continuous feeding of the biomass raw material conveyed into the multi-return-stroke biomass solid gas cracking purification furnace), and a discharge port of the transition bin 16 is connected with a discharge hopper 24 of the multi-return-stroke biomass solid gas cracking purification furnace 1 by a second conveyor (the biomass raw material in the transition bin is conveyed into the discharge hopper 24 of the multi-return-stroke biomass solid gas cracking purification furnace 1 by the second conveyor); the air outlet of the drying oven 14 is communicated with the inlet of the first dust removing system.

The multi-return-stroke biomass solid gas cracking and purifying system also comprises a crusher and a crusher discharging conveyor (when some biomass raw materials need to be crushed, the crusher and the crusher discharging conveyor are adopted); the discharge port of the crusher is connected with the biomass raw material inlet 21 of the drying oven 14 through a crusher discharge conveyor (the inlet of the crusher discharge conveyor is positioned below the discharge port of the crusher or communicated with the outlet of the crusher, and the discharge port of the crusher discharge conveyor is positioned above the biomass raw material inlet 21 of the drying oven or communicated with the outlet of the crusher discharge conveyor).

The multi-return-stroke biomass solid gas cracking and purifying system also comprises a mixing device, wherein the discharge port of the transition bin 16 is connected with the feed port of the mixing device through a second conveyor (the feed port of the second conveyor is positioned below or communicated with the discharge port of the transition bin 16; the discharge port of the second conveyor is positioned below or communicated with the feed port of the mixing device), and the discharge port of the mixing device is connected with the discharge hopper 24 of the multi-return-stroke biomass solid gas cracking and purifying furnace 1 through a third conveyor; the mixing device is provided with an additive feeding port. The mixing device may be a stirring device (conventional in the art) disposed in the barrel.

The first dust removing system comprises a cyclone dust collector 17, a pipeline 18, an induced draft fan 19 and a spray tower 20, wherein an inlet of the cyclone dust collector 17 is communicated with an air outlet of the drying furnace 14, an outlet of the cyclone dust collector 17 is communicated with an air inlet of the spray tower 20 through the pipeline 18 (a discharge port is arranged on the spray tower, purified gas is discharged), and the induced draft fan (an induced draft fan) 19 is arranged on the pipeline 18.

The first conveyor, the second conveyor and the third conveyor (or called conveying devices) can adopt screw conveyors and belt conveyors.

The biomass raw material is one or a mixture of a plurality of rice hulls, peanut shells, coconut shells, palm shells, straws, sawdust and the like according to any proportion.

The additive is one or a mixture of more of ferric trichloride, alunite, mica, dolomite and the like according to any proportion.

The carbonization and cracking of the biomass raw material is a process of gradually heating in an anaerobic environment, and the heating time and the overheating temperature are different according to the difference of the biomass raw material. The waste gas treatment is to recycle hot gas generated in the multi-return-process biomass solid gas cracking and purifying furnace to the drying furnace for use, and then the hot gas is discharged into the atmosphere after cyclone dust removal and spray tower filtration and temperature reduction reach the standard. And the cooling circulating water of the spray tower is connected into a degradation water tank, so that the circulating water of the cooling tower is kept reasonably clean and free of slag.

The utility model discloses the transportation of living beings solid gas obtained, store convenient safety, the difficult coking of burning is discharged pollution-free, makes industrial production stable for a long time, normal operating.

1. The utility model effectively eliminates a large amount of harmful components (such as wood vinegar, sulfur dioxide and other harmful substances) in the biomass in a cracking mode and the use of additives, which is an effect that the fuel can not be produced in a physical mode, so the utility model is a real clean energy.

2. The utility model produces biomass solid fuel gas, which is characterized in that air and biomass solid fuel gas (powder, 60-200 meshes, preferably 80-150 meshes) become combustible gas {1m³The biomass solid fuel gas (powder) needs 60-120m according to the heat value of the fuel³Gas (air), becoming combustible gas }. The biomass solid fuel gas is powder (without air) during transportation, and is safe and stable. The combustion process is the same as the gas, and the transportation process is powder (particles), so the transportation and the storage are very safe. When in use, the biomass solid fuel gas (powder) is efficiently mixed with gas in the biomass burner and ignited to form the clean fuel with high calorific value.

3. The biomass solid fuel gas does not contain harmful components (such as pyroligneous liquor and other harmful substances), contains trace tar, and rejects a large amount of weak base molecules (such as sodium, magnesium, calcium and the like), so that the biomass solid fuel gas is difficult to coke during combustion; the industrial production is stable for a long time and can run normally.

4. The system has the characteristics of low energy consumption and low emission.

Use of: the utility model produces biomass solid fuel gas, which is characterized in that air and biomass solid fuel gas (powder, 60-200 meshes, preferably 80-150 meshes) become combustible gas {1m³60-120m of biomass solid fuel gas (powder)³Gas (air), becoming combustible gas }. The biomass solid fuel gas is powder (without air) during transportation and is safe. The combustion process is the same as the combustion of natural gas, and the transportation process is powder (particles), so the transportation and the storage are very safe. When in use, the biomass solid fuel gas (powder) is combined with gas.

The biomass solid fuel gas does not contain pyroligneous liquor, contains trace tar, and eliminates a large amount of weak base molecules (such as sodium, magnesium, calcium and the like), so that the combustion is not easy to coke; the industrial production is stable for a long time and can run normally.

The calorific value of the biomass solid fuel gas is increased by about 1000kcal (the calorific value of the biomass solid fuel gas is 4000-. The biomass solid fuel gas can be used in various combustion furnaces such as boilers, smelting furnaces, drying furnaces and the like as industrial clean fuel, and can replace fossil fuels such as diesel oil, natural gas, pulverized coal and the like to become clean energy with low energy consumption, low emission and convenient use.

As shown in fig. 1, a preparation process of a multi-return biomass cracking carbonization molding fuel comprises the following steps:

1) preparing a multi-pass biomass solid fuel gas cracking and purifying system; as described above;

2) drying: drying the biomass raw material with the particle size of 5-15 mm in a drying furnace (the biomass raw material can be crushed to the particle size of 5-15 mm by a crusher), wherein the moisture content of the dried granular material is 10-20% by mass; the air outlet (from the air outlet) of the drying furnace enters a first dust removal system for dust removal { enters a cyclone dust remover for dust removal, is pumped into a spray tower by an induced draft fan and is discharged after being sprayed }; the heat source of the drying furnace is waste heat generated by the multi-return biomass solid gas cracking and purifying furnace 1 (the waste heat outlet of the multi-return biomass solid gas cracking and purifying furnace 1 is communicated with the gas inlet of the drying furnace through a waste heat recovery pipe, so that gas with a certain temperature is provided for the drying furnace, and energy is saved);

3) mixing: the dried granular materials are conveyed into a transition bin 16 by a first conveyor 15 and then conveyed into a mixing device by a second conveyor, and additives are added from an additive adding port on the mixing device, wherein the adding amount of the additives is 5-10% of the mass of the dried granular materials; uniformly mixing the dried granular material and the additive by using a mixing device to obtain a mixed material; the mixed material is conveyed into a discharging hopper of the multi-return-stroke biomass solid fuel gas cracking purification furnace 1 by a third conveyor;

4) multi-pass semi-carbonization: when the multi-return rotator of the multi-return biomass solid fuel gas cracking and purifying furnace 1 adopts 2 rotators, the mixed material is sent into a first channel of the multi-return rotator by a screw feeder to be preheated; then the mixture enters a second channel outside the first channel through a first blanking port to be subjected to pyrolysis (the pyrolysis temperature is 200-;

when the multi-return-stroke rotating body adopts 3 rotating bodies, the mixed material is conveyed into a first channel of the multi-return-stroke rotating body by a screw feeder to be preheated; then the mixture enters a second channel outside the first channel through a first blanking port to be preheated again, and then enters a third channel outside the second channel through a second blanking port to be subjected to pyrolysis (the pyrolysis temperature is 200-800 ℃, the outlet temperature of a combustion chamber is about 1200 ℃), the mixed material is heated by hot gas, the temperature of the hot gas is 200-800 ℃, the heating time is 5-25 minutes (the running time of the mixed material from a feeding port to a discharging port is 5-25 minutes, and the mixed material is semi-carbonized in a multi-return-process biomass solid gas pyrolysis purification furnace), so as to obtain a semi-carbonized material, the semi-carbonized material enters a spiral blanking pipe 44 from the discharging port to be discharged, and the moisture content of the semi-carbonized material is 0.5-3%;

meanwhile, the generated biological pyrolysis gas is recycled to a combustion chamber 8 of a combustor 6 for combustion, and the biomass raw material is dried and pyrolyzed by a self heat source;

5) gas, water and particle materials which run out from a discharge port of the multi-pass biomass solid fuel gas cracking purification furnace 1 are collected by a cyclone 30 (or called cracking gas collection cover), gas and material separation is carried out through a gas-material separator 31, and the particle materials fall into the discharge port; gas separated by the liquid-gas separator enters a combustor 7 of the combustor through a combustible smoke pipe 5 (biomass raw materials are heated to reach a certain temperature and then overflow biomass cracking combustible gas, the gas components are methane, hydrogen, oxygen, nitrogen and the like, cracked gas passes through the liquid-gas separator by a cracked gas collecting cover and then enters a combustion chamber for combustion, the cracked gas can be more and more along with the deep gas amount of cracking, and thus, the output power of the combustor can be gradually reduced according to the temperature rise of the combustion chamber until the combustor is stopped);

waste hot gas generated by a combustion chamber 8 of the combustion engine 6 is subjected to heat exchange through a heat exchanger and then enters a hot gas inlet of the drying furnace to be communicated (gas with a certain temperature is provided for the drying furnace, so that energy is saved); the cold water enters the heat exchanger to generate hot water (when the cold water enters the heat exchanger, the heat exchange is carried out to generate hot water which can be used for bathing of workers and the like);

the semi-carbonized material from the discharge port flows out from the outlet of the spiral blanking pipe 44 and is sent into a mill for grinding by a water-cooled screw machine (conveyor and conveying device) 25 to obtain the material with the particle size of 60-200 meshes (optimally 80-150 meshes); and (4) dedusting the 60-200-mesh material by using a second dedusting system to obtain biomass solid fuel gas (sending the biomass solid fuel gas into a finished product warehouse, loading and packaging).

Example 2

As shown in fig. 7 to 9, basically the same as in embodiment 1, except that: the three-rotor type feeding device is characterized in that 3 rotors are adopted, a third rotor 46 is positioned outside a second rotor 32 (the third rotor 46 wraps the second rotor 32, a third channel 47 is positioned outside a second channel 38), a third channel 47 is arranged in the third rotor 46, a second blanking port 45 is positioned in the third channel 47, the second channel 38 is communicated with the third channel 47 through the second blanking port 45, a third material guide plate 48 is arranged in the third rotor 46, and the third material guide plate 48 inclines backwards (the third material guide plate pushes materials to move backwards); a third blanking port 49 is provided at the rear end of the third rotator 46.

The third blanking port 49 is communicated with the inlet of the spiral blanking pipe 44, the spiral blanking pipe 44 is spirally wound on the outer wall of the third revolving body 46, and the spiral blanking pipe 44 is fixedly connected with the third revolving body 46; a discharge port 40 is arranged on the furnace body below the spiral blanking pipe 44 (an annular groove is arranged on the furnace body at the discharge port 40, the annular groove is used for containing materials, the discharge port 4 is positioned in the annular groove, and the materials of the third revolving body 46 fall from the third blanking port and are discharged from the discharge port 40 after passing through the spiral blanking pipe). The discharge port 40 communicates with the inlet of the water-cooled screw (conveyor, conveying device) 25.

When the spiral blanking pipe 44 is not adopted, the furnace body below the third blanking port 49 is provided with the discharge port 40.

Claims (3)

1. The multi-return biomass solid fuel gas preparation system with the waste heat utilization function is characterized by comprising a multi-return biomass solid fuel gas cracking purification furnace, a heat exchanger (11), a cold water pipe (10) and a hot water pipe (12);

the multi-return-stroke biomass solid fuel gas cracking and purifying furnace comprises a furnace body, a spiral feeder (22), a discharging hopper (24), a front carrier roller (26), an annular driven gear (27), a rear carrier roller (28), a cyclone cylinder (30), a multi-return-stroke rotating body, a main motor (41), a waste heat recovery pipe and a burner (6); the left side and the right side of the front part of the furnace body are respectively provided with a front carrier roller (26), the left side and the right side of the rear part of the furnace body are respectively provided with a rear carrier roller (28), the front part of the multi-return-stroke rotating body is placed on the front carrier roller (26), and the rear part of the multi-return-stroke rotating body is placed on the rear carrier roller (28); an annular driven gear (27) is fixed on the outer wall of the front part of the multi-return-stroke rotating body, a main motor (41) is arranged on the furnace body, a driving gear is arranged on an output shaft of the main motor (41), and the driving gear is meshed with the driven gear (27); the spiral feeder (22) and the lower hopper (24) are respectively and fixedly arranged on the furnace body, the lower hopper (24) is positioned above the front part of the spiral feeder (22), the discharge port of the lower hopper (24) is communicated with the feed port of the spiral feeder (22), and the discharge port of the spiral feeder (22) is positioned in the feed port of the first revolving body (34) of the multi-return revolving body; the hot flue gas chamber (50) is communicated with a combustion chamber (8) of a combustor (6), the hot flue gas chamber (50) is arranged on a furnace body, and the hot flue gas chamber (50) is positioned on the outer side of the multi-return-stroke rotating body; a waste hot gas outlet (36) is arranged on the hot flue gas chamber (50), and the waste hot gas outlet (36) is communicated with a waste heat recovery pipe;

the multi-return-stroke rotating body comprises 2-3 rotating bodies, the second rotating body (32) is positioned outside the first rotating body (34), the second rotating body (32) is fixedly connected with the first rotating body (34), a first channel (35) is arranged in the first rotating body (34), a second channel (38) is arranged in the second rotating body (32), the front end of the first channel (35) is a feed port, the rear end of the first channel (35) is a closed end, a first blanking port (37) is arranged at the rear end part of the first rotating body (34), the first channel (35) is communicated with the second channel (38) through the first blanking port (37), and a second blanking port is arranged at the front end part of the second rotating body (32); a first material guide plate (33) is arranged in the first revolving body (34), the first material guide plate (33) inclines backwards, a second material guide plate (39) is arranged in the second revolving body (32), and the second material guide plate (39) inclines forwards;

when 2 revolving bodies are adopted, a discharge hole (40) is arranged on the furnace body below the second blanking hole, an annular groove is arranged on the furnace body at the second blanking hole, and the discharge hole (40) is positioned in the annular groove;

when 3 revolving bodies are adopted, the third revolving body (46) is positioned outside the second revolving body (32), the third revolving body (46) is fixedly connected with the second revolving body (32), a third channel (47) is arranged in the third revolving body (46), the second blanking port (45) is positioned in the third channel (47), the second channel (38) is communicated with the third channel (47) through the second blanking port (45), a third material guide plate (48) is arranged in the third revolving body (46), and the third material guide plate (48) is inclined backwards; a third blanking port (49) is formed in the rear end of the third revolving body (46), a discharge port (40) is formed in the furnace body below the third blanking port (49), an annular groove is formed in the furnace body at the third blanking port, and the discharge port (40) is located in the annular groove;

a cyclone (30) is arranged on the furnace body above the discharge hole (40);

the waste heat recovery pipe consists of a first waste heat recovery pipe (9) and a second waste heat recovery pipe (13), one end of the first waste heat recovery pipe (9) is communicated with a waste hot gas outlet (36), the other end of the first waste heat recovery pipe (9) is connected with a first medium inlet of the heat exchanger (11), one end of the second waste heat recovery pipe (13) is connected with a first medium outlet of the heat exchanger (11), and the other end of the second waste heat recovery pipe (13) is communicated with a hot gas inlet of the drying furnace (14); the cold water pipe (10) is connected with a second medium inlet of the heat exchanger (11), and the hot water pipe (12) is connected with a second medium outlet of the heat exchanger (11).

2. The system for preparing the multi-pass biomass solid fuel gas with the waste heat utilization function according to claim 1, is characterized in that: the spiral feeder (22) comprises a cylinder body (51), a spiral feeding rod, spiral blades and a feeding motor (23), wherein the rear end of the cylinder body is a discharging end, a feeding port is formed in the upper end of the front part of the cylinder body, the spiral feeding rod is provided with the spiral blades, the spiral feeding rod and the spiral blades are positioned in the cylinder body, the feeding motor (23) is positioned on the front side of the cylinder body, and a shaft of the feeding motor (23) is connected with the front end part of the spiral feeding rod through a coupler; the rear end of the cylinder is inserted into a feed port of a first rotary body (34) of the multi-return rotary body; the cylinder and the feeding motor (23) are fixedly arranged on the furnace body.

3. The system for preparing the multi-pass biomass solid fuel gas with the waste heat utilization function according to claim 1, is characterized in that: the multi-pass biomass solid gas preparation system further comprises a combustible smoke recovery pipe, a cyclone dust collector, a combustible smoke induced draft fan and a combustible smoke pipe; one end of the combustible smoke recycling pipe is communicated with a cyclone cylinder on the furnace body, the other end of the combustible smoke recycling pipe is communicated with an inlet of a cyclone dust collector, an outlet of the cyclone dust collector is communicated with a burner of the burner through a combustible smoke pipe, and a combustible smoke induced draft fan is arranged on the combustible smoke pipe.

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