CN106123561A - A biomass drying equipment with flue gas exhaust gas catalysis - Google Patents

Abstract

The invention provides biomass drying equipment with flue gas and waste gas catalysis, which comprises a biomass burner and a drying box, wherein the drying box can be a boiler or a drying box, and further comprises a waste gas circulating device, a secondary combustion device, an air preheating device and a preheated air circulating device.

Description

A biomass drying equipment with flue gas exhaust gas catalysis

technical field

The invention belongs to the field of mechanical engineering, and in particular relates to a biomass drying equipment with flue gas and waste gas catalysis with dual fire flows.

Background technique

Biomass burners are widely used in industrial applications. In order to consider cost issues, some factories produce a large amount of waste gas during the use of biomass burners, such as drying metal. If the waste gas generated during use is to be treated, An external exhaust gas treatment system needs to be connected, which is too expensive and cumbersome to assemble. In addition, a large amount of heat is generated during the combustion process of the biomass burner, and the harmful exhaust gas is discharged into the air, resulting in a waste of energy.

Based on this reason, the inventor of this case proposed a new type of biomass drying equipment with flue gas and waste gas catalysis, which can achieve both environmental protection and energy saving effects.

Contents of the invention

The purpose of the invention is to solve the problem of waste gas emission when the biomass burner is in use, and at the same time reduce the cost of environmental protection.

In order to solve the above problems, the technical solution adopted in the present invention is:

A biomass drying equipment with flue gas exhaust gas catalysis, including a biomass burner and a drying box, characterized in that it also includes an exhaust gas circulation device, a secondary combustion device, an air preheating device and a preheating air circulation device; The material burner includes the main body of the biomass burner and the fire pipe. The fire pipe is provided with branches, including the first fire outlet pipe and the second fire outlet pipe; the drying box is connected with the first fire outlet pipe; the waste gas circulation device includes the first fan and waste gas recovery Pipeline, the suction port of the first fan is connected with the drying box, the outlet of the first fan is connected with the waste gas recovery pipe; the secondary combustion device is the second fire pipe, the second fire pipe is provided with a waste gas recovery port, and the waste gas recovery port is connected with the waste gas recovery pipe The pipes are connected; the heat exchange device includes an exhaust gas bin and an air heat absorbing device, and the exhaust gas bin is connected with the second fire outlet pipe; the air circulation device includes an air circulation pipe and a second fan that leads the air to the biomass burner, and the air circulation pipe Connected with the air heat sink.

An air channel is arranged outside the fire tube, and the air channel is provided with an air supply device for making the air flow.

The air supply device is the first fan, and the air outlet of the air channel communicates with the drying box.

The fire tube is provided with an outer wall of the fire tube and an inner wall of the fire tube, and a gap serving as the air channel is formed between the outer wall of the fire tube and the inner wall of the fire tube.

The air channel is formed in the whole fire pipe, the air outlet of the air channel is connected with the drying box, and the air outlet of the air channel is provided with a wind control board for adjusting the speed of the air flow.

The wind control board is a spiral windshield device, including a disc and a windshield device; there are grooves in the disc, and the windshield device includes two or more windshield groups, and each windshield group includes a female windshield and a windshield. More than two sub windshields that can rotate along the disc, the mother windshield is fixed in the disc, and the sub windshields are embedded in the grooves.

The sub windshield is equipped with a rotating drive device.

The rotating driving device is a stepping motor.

The wind control panel is detachably connected with the air outlet of the air channel.

The second fire outlet pipe is provided with a burner, and the burner is equipped with a swirl plate.

The swirl plate is a spiral baffle formed on the inner wall of the burner and extending along the burner to the flame flow direction.

The exhaust gas recovery port corresponds to the burner.

The air heat absorbing device is an air preheating passage for passing air surrounding the waste bin.

The waste gas bin includes the outer wall of the waste gas bin and the inner wall of the waste gas bin, and the outer wall of the waste gas bin and the inner wall of the waste gas bin form a cavity as an air heat absorbing device.

The air heat absorbing device has an air inlet and an air outlet connected with the air circulation pipeline.

The air inlet and air outlet of the air heat absorbing device are arranged on different levels.

There is a dust collector at the bottom of the waste gas chamber.

There is an exhaust port on the top of the waste gas bin, and a dust removal port on the bottom of the waste gas bin.

The invention recycles and combusts the waste gas generated during the operation of the biomass burner to reduce emission pollution, and at the same time recycles the heat generated by combustion to recycle the waste heat in the waste gas through a heat recovery cycle, thereby achieving the effect of energy saving.

Description of drawings

Fig. 1 is the overall plan view of the present invention;

Fig. 2 is a partial schematic view of the fire tube of the present invention;

Fig. 3 is the overall front view of the present invention;

Fig. 4 is a schematic diagram of the connection between the air circulation pipeline and the air preheating device of the present invention;

Fig. 5 is a partial schematic view of the first fire outlet pipe;

Fig. 6 is a schematic diagram of the structure of the wind control device.

In the picture:

1-biomass burner 2-fire tube

21-First fire pipe 22-Second fire pipe

3-drying box 4-air preheating device

41-Exhaust gas bin 42-Air heat absorbing device

43-air circulation duct 51-first fan

52-Second fan 6-Air channel

7-wind control board 71-disk

72-groove 73 female windshield

74-Sub windshield 8 swirl plate

9-Exhaust gas recovery pipe

detailed description

In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific diagrams.

As shown in Figure 1-6, a biomass drying equipment with flue gas exhaust gas catalysis includes a biomass burner 1, a fire pipe and a drying box, and is characterized in that it also includes an exhaust gas circulation device, a secondary combustion device, Air preheating device 4 and preheating air circulation device; biomass burner 1 includes biomass burner 1 main body and fire pipe 2, and fire pipe 2 is provided with branches, including first fire outlet pipe 21 and second fire outlet pipe 22; The dry box is connected to the first fire outlet pipe 21; the waste gas circulation device includes a first fan 51 and a waste gas recovery pipeline 9, the suction port of the first fan 51 is connected to the drying box, and the air outlet of the first fan 51 is connected to the waste gas recovery pipeline 9; The secondary combustion device is the second fire outlet pipe 22, and the second fire outlet pipe 22 is provided with a waste gas recovery port, and the waste gas recovery port is communicated with the waste gas recovery pipeline 9; The two fire outlet pipes 22 are connected; the air circulation device includes an air circulation pipe 43 and a second blower fan 52 for leading air into the biomass burner 1 , and the air circulation pipe 43 communicates with the air heat absorbing device 42 .

In the following, the metal drying box 3 will be used as a specific embodiment for further description. The biomass drying equipment with flue gas and exhaust gas catalysis is heated by the biomass burner 1 to the metal drying box 3, so that the metal drying box 3 can remove impurities from the metal, and the impurities attached to the metal are not completely removed during operation. Combustion, and harmful gases such as new impurities produced during combustion, are introduced into the second fire outlet pipe 22 by the first fan 51 for secondary combustion, so that it can be fully oxidized, and then discharged to the exhaust gas dust collector for processing; The heat generated after the secondary combustion is transferred to the air circulation pipeline through the heat recovery device for heat recovery. The present invention recycles and burns the waste gas generated when the biomass burner 1 is working to reduce emission pollution, and at the same time recycles the heat generated by combustion to recycle the waste heat in the waste gas through a heat recovery cycle, thereby achieving the effect of energy saving.

An air passage 6 is arranged outside the fire pipe 2, and the air passage 6 is provided with a blower device for making air flow. When the biomass burner 1 is working, the temperature is too high, and the air supply device will cause the air in the air channel 6 to flow, and the flowing air can exchange heat for the air in the channel to achieve the effect of cooling the fire tube.

The air supply device is a first fan 51, and the air outlet of the air channel 6 communicates with the drying box. Adopting the first blower fan 51 as the air supply device in the air passage 6 can save cost at first; secondly, under the effect of the first blower blower 51, the air passage 6 can blast into the drying box 3 to increase the size of the flame; again, the first The blower 51 can absorb the air in the channel and lead it into the second fire outlet pipe 22 together with the waste gas, so as to provide oxygen for the secondary combustion.

The fire tube 2 is provided with an outer wall of the fire tube and an inner wall of the fire tube, and a gap serving as an air channel 6 is formed between the outer wall of the fire tube and the inner wall of the fire tube. Fire tube 2 can be fully contacted with air to achieve better cooling effect.

The air channel 6 is formed in the whole fire pipe, and the air outlet of the air channel 6 is provided with a wind control panel 7 for adjusting the air flow velocity. The air control panel 7 can block the air channel 6 to reduce the air velocity, thereby controlling the size of the flame of the first fire outlet pipe 21; when the air velocity decreases, the size of the flame will decrease.

The wind control board 7 is a spiral windshield device, including a disc 71 and a windshield device; the disc 71 is provided with a groove 72, and the windshield device includes more than two groups of windshields, and each windshield group includes a female Windshield 73 and more than two child windshields 74, female windshield 73 is fixed in the disc 71, and female windshield 73 is equipped with sub-windshield 74 that can rotate along disc 71, and child windshield The wind plate 74 is embedded in the groove 72 . The sub wind deflector 74 rotates along the groove 72 in the disc 71 , thereby shielding the air passage 6 together with the female wind deflector 73 . The sub-windshield 74 is equipped with a rotation drive device to drive the sub-windshield 74 to rotate.

The rotating driving device is a stepping motor. The size of the air passage 6 can be adjusted according to the number of gears by adopting a stepping motor.

The wind control panel 7 is detachably connected with the air outlet of the air channel 6 . When the wind control board breaks down, it is easy to disassemble for maintenance, and when it is completely damaged, it is not necessary to replace the fire pipe 2, only the wind control board needs to be replaced.

The second fire outlet pipe 22 is provided with a burner, and the burner is equipped with a swirl plate 8 . When the exhaust gas and the flame are mixed and enter the swirl plate 8, the exhaust gas and the flame are mixed and stirred, and the combustion is more complete.

The preferred swirl plate 8 is a spiral baffle formed on the inner wall of the burner and extending along the burner towards the flame flow direction. Easy to implement and simple in structure.

The exhaust gas recovery port corresponds to the burner. When the waste gas of the waste gas recovery pipeline 9 is introduced into the waste gas recovery port, the temperature of the burner can be cooled, so as to achieve the cooling effect, improve the life of the burner, and prevent the structure of the swirl plate 8 from being destroyed.

The air heat absorbing device 42 is an air preheating passage for passing air around the waste bin. In this way, the air heat absorbing device 42 can wrap the exhaust gas bin 41 inside, and the internal heat is transferred to the air heat absorbing device 42 through the inner wall of the exhaust gas bin 41, thereby realizing heat exchange.

The exhaust gas bin 41 includes an outer wall of the exhaust gas bin and an inner wall of the exhaust gas bin, and a cavity serving as an air heat absorbing device 42 is formed on the outer wall of the exhaust gas bin and the inner wall of the exhaust gas bin. The structure is simple and the effect of heat exchange can be easily realized.

The air heat absorbing device 42 has an air inlet and an air outlet communicating with the air circulation duct. The air heat absorbing device 42 is a two-way port, one end is connected to the air, and the other end is connected to the biomass burner 1 through the air circulation channel, sucks in the external cold air for heat exchange, and then transfers the hot air to the biomass burner 1 , supply oxygen to it, and the air with heat can increase the temperature of the biomass burner 1 during combustion.

The air inlet and air outlet of the air heat absorbing device 42 are arranged on different levels. In this way, when the air enters the air heat absorbing device 42, it will circle along the air heat absorbing device 42 and pass through the whole air heat absorbing device 42, and the air flow makes the preheating more sufficient.

The bottom of the waste gas chamber 41 is equipped with a dust collector. After the high-temperature waste gas is cooled, the particles are easy to precipitate. The gas is treated with a dust collector to further precipitate the particulate matter contained in the waste gas, which can effectively reduce the content of the particle matter in the waste gas discharge.

An exhaust port is arranged on the top of the waste gas bin 41, and an ash removal port is arranged on the bottom of the waste gas bin 41. Exhaust ports and dust removal ports enable exhaust and particulate matter to be discharged separately.

The above content is a further detailed description of the present invention in combination with preferred technical solutions, and it cannot be assumed that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field of the present invention, without departing from the concept of the present invention, they can also make simple deduction and replacement, which should be regarded as the protection scope of the present invention.

Claims (10)

1. a biomass drying plant for band flue gas exhaust fume catalytic, including biomass combustion machine and drying baker, it is characterised in that Also include exhaust gas circulating device, after burner, air preheater and preheated air circulating device；

Described biomass combustion machine includes that biomass combustion machine main body and fire tube, described fire tube are provided with branch, goes out fire including first Pipe and the second fire-outtaking tube；

Described drying baker is connected with described first fire-outtaking tube；

Described exhaust gas circulating device includes the first blower fan and exhaust gas recovery conduit, the inlet scoop of described first blower fan and described drying Case connects, and the air outlet of described first blower fan connects with described exhaust gas recovery conduit；

Described after burner is provided with waste gas recovery mouth, and described waste gas recovery mouth connects with described exhaust gas recovery conduit；

Described air preheater includes the waste gas storehouse by waste gas and absorbs the air heat sink of waste gas storehouse heat, described Waste gas storehouse is connected with described second fire-outtaking tube；

Described air circulation device includes air flow conduit and makes air lead to the second blower fan in biomass combustion machine, institute State air flow conduit to connect with described air heat sink.

The biomass drying plant of band flue gas exhaust fume catalytic the most according to claim 1, it is characterised in that outside described fire tube Being provided with air duct, described air duct is equipped with the air-supply arrangement making air flow.

The biomass drying plant of band flue gas exhaust fume catalytic the most according to claim 2, it is characterised in that described air-supply fills Being set to described first blower fan, the air outlet slit of described air duct is connected with described drying baker.

The biomass drying plant of band flue gas exhaust fume catalytic the most according to claim 3, it is characterised in that described fire tube sets There are fire tube outer wall and fire tube inwall, between being formed with as described air duct between described fire tube outer wall and described fire tube inwall Gap.

5. according to the biomass drying plant of the band flue gas exhaust fume catalytic described in claim 3 or 4, it is characterised in that described air Passage is formed at whole described fire tube, and the air outlet slit of described air duct is provided with the wind control of regulation speed air flow size Plate.

The biomass drying plant of band flue gas exhaust fume catalytic the most according to claim 5, it is characterised in that described wind control plate For spiral abat-vent, including disk and wind shield device；Being provided with groove in described disk, described wind shield device includes two groups Above deep bead group, each described deep bead group include female deep bead and two or more can along the sub-deep bead of disk rotational, Described female deep bead is fixed in disk, and described sub-deep bead embeds in described groove.

The biomass drying plant of band flue gas exhaust fume catalytic the most according to claim 6, it is characterised in that described son keeps out the wind Plate is equipped with device of rotation driving.

The biomass drying plant of band flue gas exhaust fume catalytic the most according to claim 7, it is characterised in that described rotation is driven Dynamic device is motor.

9. according to the biomass drying plant of the band flue gas exhaust fume catalytic described in claim 6-8 any claim, its feature It is that described wind control plate is dismantled and assembled with the air outlet slit of described air duct to link together.

10. according to the biomass drying plant of the band flue gas exhaust fume catalytic described in claim 1-4 any claim, its feature Being that described after burner has nozzles, described nozzles connect with described second fire-outtaking tube, be equipped and make at described nozzles The spiral board that flow rotation advances.