CN208022957U - A kind of biomass fluid bed equipment with rotary kiln coupling producing biological charcoal - Google Patents

Abstract

A device for producing biochar coupled with a biomass fluidized bed and a rotary kiln belongs to the technical field of biochar production and solves the problems existing in the existing biochar production technology. It includes a circulating fluidized bed, a rotary kiln drum 1 and a rotary The second kiln drum and the first rotary kiln drum are interspersed on the tail flue of the circulating fluidized bed. The second rotary kiln drum is connected to the end of the tail flue. The bag filter is connected; the feed port of the rotary kiln drum 2 is connected with the shaftless screw feeder, and the discharge port of the rotary kiln drum 2 is connected with the feed port of the rotary kiln drum 1 through a star feeder; the rotary kiln drum One end of the discharge port of one is connected to the furnace of the circulating fluidized bed through a gas delivery pipe, and a fan is arranged on the gas delivery pipe to send the tar-containing gas generated during the biomass carbonization process to the furnace for combustion and provide heat; the utility model uses for the production of biochar.

Description

A device for producing biochar by coupling a biomass fluidized bed with a rotary kiln

technical field

The utility model belongs to the technical field of biochar production, in particular to a device for coupling a biomass fluidized bed and a rotary kiln to produce biochar.

Background technique

As the two major themes of today's social development, energy and environment have become the focus of people's attention; the uncoordinated energy production and consumption lead to excessive energy consumption, environmental pollution and ecological damage. At present, biomass such as crop stalks has not been effectively utilized as a widely distributed energy source, and large-scale incineration has caused serious environmental pollution. Biochar produced from biomass is in great demand in water treatment, air purification, soil remediation, etc. Biomass carbonization technology is currently a new technology for biomass treatment in the world, with the advantages of reduction, harmlessness, resource It not only provides new energy in the form of heat, but also provides inexhaustible materials for environmental protection in the form of biomass charcoal powder; however, the existing biochar production technology has thermal energy Low utilization rate, serious pollution and other problems, waste a lot of energy while preparing biochar, resulting in high production cost of biochar, this solution was developed to solve this problem.

Contents of the invention

The purpose of this utility model is to solve the above-mentioned problems existing in the existing biochar production technology, and to provide a kind of equipment for coupling biomass fluidized bed and rotary kiln to produce biochar, and its technical scheme is as follows:

A biomass fluidized bed coupled with a rotary kiln to produce biochar equipment, which includes a circulating fluidized bed, a rotary kiln drum 1 and a rotary kiln drum 2, the rotary kiln drum 1 is interspersed on the tail flue of the circulating fluidized bed, Rotary kiln drum 1 rotates with the tail flue, and rotary kiln drum 2 rotates with the end of the tail flue; circulating fluidized bed combustion of biomass has the advantages of high combustion efficiency and low pollutant emissions, and the high-temperature flue gas in the tail flue The gas temperature is as high as 800 degrees Celsius, which can provide the heat required for biomass carbonization. The high-temperature flue gas in the tail flue directly heats the rotary kiln drum 1 to effectively carbonize the biomass inside. After the high-temperature flue gas carbonizes the biomass, the temperature drops to 200 to 300 degrees Celsius, enter the rotary kiln drum 2 to directly dry the biomass bulk material inside, the precipitated water vapor is brought out of the rotary kiln drum 2 with the flue gas, and the temperature drops to 120 to 150 after the flue gas dries the biomass bulk material Celsius, after passing through the bag filter, it is discharged to the atmosphere, and the biomass feed end of the rotary kiln drum 2 is provided with a flue gas outlet and connected to the bag filter;

Both ends of rotary kiln drum 1 and rotary kiln drum 2 are provided with shaft support. Both rotary kiln drum 1 and rotary kiln drum 2 are connected with rolling driving equipment, which are driven by motors and other driving equipment to roll at the required speed. This is the present There is no need to repeat the technology;

The feed port of the rotary kiln drum 2 is connected with the shaftless screw feeder, and the discharge port of the rotary kiln drum 2 is connected with the feed port of the rotary kiln drum 1 through a star feeder, and the dried biomass bulk material It is sent to the rotary kiln drum 1 for carbonization, the discharge port of the rotary kiln drum 1 is connected with the water-cooled auger, and the unloaded product enters the water-cooled auger to cool and then transported away; the rotary kiln drum 1 and the rotary kiln drum 2 discharge port The downward slope is three to five degrees to make it easier to unload the material; one end of the discharge port of the rotary kiln drum is connected to the furnace of the circulating fluidized bed through a gas delivery pipe, and a fan is installed on the gas delivery pipe to carbonize the biomass The tar-containing gas produced in the process is sent to the furnace for combustion and provides part of the heat required for biomass carbonization; the insufficient part is provided by the combustion of biomass in the fluidized bed.

The tail flue adopts an S-shaped rotary circulation structure to increase the heating area for the drum of the rotary kiln.

The beneficial effects of the utility model are: the undried biomass bulk material can be directly used as carbonization raw material, the drying and carbonization process of the biomass bulk material can be integrated, and the biomass and the tar-containing oil generated during the carbonization process of the biomass can be used. The high-temperature flue gas generated by the combustion of gas in the fluidized bed is used as the heat of biomass drying and carbonization, and the biomass bulk material is directly converted into biochar, which greatly reduces the cost input and realizes efficient resource utilization; solves the problem of existing technology Large heat loss, serious pollution and other problems.

Description of drawings:

Fig. 1 is the structural principle schematic diagram of the utility model.

Detailed ways:

Referring to Figure 1, a biomass fluidized bed and rotary kiln coupling production equipment for biochar, it includes a circulating fluidized bed 1, a rotary kiln drum 2 and a rotary kiln drum 2 3, the rotary kiln drum 1 2 is interspersed in the circulation On the tail flue 1-1 of the fluidized bed, the rotary kiln drum 1 2 rotates with the tail flue 1-1, and the rotary kiln drum 2 3 rotates and connects with the end of the tail flue 1-1; the circulating fluidized bed 1 burns Biomass has the advantages of high combustion efficiency and low pollutant emission. The high-temperature flue gas temperature in the tail flue 1-1 is as high as 800 degrees Celsius, which can provide the heat required for biomass carbonization. The tail flue 1-1 The high-temperature flue gas directly heats the rotary kiln drum 1 2 to effectively carbonize the biomass inside. After the high-temperature flue gas carbonizes the biomass, the temperature drops to 200 to 300 degrees Celsius, and enters the rotary kiln drum 2 3 to treat the biomass bulk material inside. Direct drying, the precipitated water vapor is taken out of the rotary kiln drum 23 along with the flue gas, and the temperature of the flue gas dried biomass bulk material is reduced to 120 to 150 degrees Celsius, and is discharged to the atmosphere after passing through the bag filter 4, and is discharged to the atmosphere in the rotary kiln drum 23 The biomass feed end is provided with a flue gas outlet and connected with the bag filter 4;

Both ends of rotary kiln drum 1 2 and rotary kiln drum 2 3 are supported by shaft frames. Both rotary kiln drum 1 2 and rotary kiln drum 2 3 are connected with rolling driving equipment, which are driven by motors and other driving equipment to roll at the required speed. , this is the prior art and will not be described in detail;

The feed port of the rotary kiln drum 2 3 is connected with the shaftless screw feeder 5, the discharge port of the rotary kiln drum 2 3 is connected with the feed port of the rotary kiln drum 1 2 through the star feeder 6, and the dried The biomass bulk material is sent to the rotary kiln drum 1 for carbonization, the discharge port of the rotary kiln drum 2 is connected with the water-cooled auger 7, and the unloaded product enters the water-cooled auger 7 to cool and then transported away; the rotary kiln drum 1 2 and one end of the discharge port of rotary kiln drum 2 3 is inclined downward by three to five degrees to make it easier to discharge the material; one end of the discharge port of rotary kiln drum 1 2 is connected to the furnace of the circulating fluidized bed through a gas delivery pipe, A fan 8 is installed on the gas delivery pipe to send the tar-containing gas generated during the biomass carbonization process to the furnace for combustion and provide part of the heat required for biomass carbonization; the insufficient part is provided by the combustion of biomass in the fluidized bed.

The tail flue 1-1 adopts an S-shaped rotary circulation structure to increase the heating area of the rotary kiln drum 1-2.

Claims (4)

1. A device for coupling biomass fluidized bed and rotary kiln to produce biochar, characterized in that it comprises circulating fluidized bed (1), rotary kiln drum one (2) and rotary kiln drum two (3), rotary kiln Drum 1 (2) is interspersed on the tail flue (1-1) of the circulating fluidized bed, rotary kiln drum 1 (2) rotates with the tail flue (1-1), rotary kiln drum 2 (3) and The end of the tail flue (1-1) is rotationally connected; the biomass feed end of the rotary kiln drum two (3) is provided with a flue gas outlet and connected with the bag filter (4); the rotary kiln drum one (2) and Both ends of the rotary kiln drum 2 (3) are provided with shaft support, the rotary kiln drum 1 (2) and the rotary kiln drum 2 (3) are connected with the rolling drive equipment; the feed port of the rotary kiln drum 2 (3) It is connected with the shaftless screw feeder (5), and the discharge port of the rotary kiln drum two (3) is connected with the feed port of the rotary kiln drum one (2) through the star feeder (6); One end of the discharge port of (2) is connected to the furnace of the circulating fluidized bed through a gas delivery pipe, and a fan (8) is arranged on the gas delivery pipe. 2. A device for coupling biomass fluidized bed and rotary kiln to produce biochar as claimed in claim 1, characterized in that the tail flue (1-1) adopts an S-type rotary circulation structure. 3. A kind of equipment for coupling biomass fluidized bed and rotary kiln to produce biochar as claimed in claim 1, characterized in that the discharge port of rotary kiln drum one (2) is connected with water-cooled auger (7). 4. A kind of equipment for biomass fluidized bed and rotary kiln coupling production biochar as claimed in claim 1, is characterized in that rotary kiln drum one (2) and rotary kiln drum two (3) outlet one end is inclined downward Three to five degrees.