Straw carbonization device

Abstract

The utility model discloses a straw carbonization device which comprises a closed combustion chamber, a carbonization furnace is arranged in the combustion chamber, a combustor is arranged at the bottom of the carbonization furnace, the combustor is communicated with an external gas pipe, and a sealing cover capable of being opened and closed is arranged at the bottom of the carbonization furnace. The top of the combustion chamber and the top of the carbonization furnace are respectively communicated with the tail gas treatment tank through a second calandria and a first calandria. According to the straw carbonization device, the tail gas treatment tank and the filter mechanism are arranged, tail gas in the carbonization furnace and tail gas in the combustion chamber are synchronously treated independently at the same time, and the tail gas in the carbonization furnace is conveyed into the combustor through the sucking pump and the pipeline after being subjected to impurity removal and filtration. According to the present invention, the combustible gas in the combustion chamber is combusted so as to provide the calorific value for the carbonization furnace, such that the tail gas utilization rate is improved, and the tail gas in the combustion chamber is subjected to impurity removal and filtration so as to eliminate the harmful component and then is discharged so as to reduce the pollution.

Description

Technical Field

[0001] The utility model relates to the technical field of straw treatment, in particular to a straw carbonization device. Background Technique

[0002] After straw is carbonized and then further processed, it can be used as carbon-based fertilizer, increasing the content of carbon-based organic matter in the soil, quickly transforming the soil structure, balancing salts and moisture, creating a soil environment conducive to the healthy growth of plants through rapid ripening, increasing soil fertility, and promoting crop growth.

[0003] For example, a straw carbonization system disclosed in Chinese invention patent CN 108913161 A can be used for carbonizing crop straw and recovering the generated flue gas, solving the technical problems of serious heat loss, unsatisfactory carbonization effect, and low condensation efficiency in the prior art.

[0004] The inventor believes that the above device system at least still has the following deficiencies to be improved. First, although the tail gas generated in the carbonization furnace is subjected to corresponding environmental protection treatment, the tail gas in the carbonization furnace contains combustible gases (methane, hydrogen), and this part of the available gas is directly discharged without being properly utilized. Second, the burner also generates a large amount of tail gas (containing a small amount of sulfur dioxide and nitrogen oxides) during the combustion process, and the small amount of harmful components in the tail gas are not properly disposed of.

[0005] Therefore, our company proposes this device, which can properly utilize the combustible gas in the carbonization furnace and properly treat the tail gas generated during the combustion of the burner. Content of the Utility Model

[0006] (1) Technical Problems to be Solved

[0007] Aiming at the deficiencies of the prior art, the utility model provides a straw carbonization device, which solves the problem of low efficiency in treating tail gas of the existing straw carbonization device.

[0008] (2) Technical Solutions

[0009] To achieve the above purpose, the utility model provides the following technical solutions: A straw carbonization device includes a closed combustion chamber, a carbonization furnace is arranged in the combustion chamber, a burner is arranged at the bottom of the carbonization furnace, the burner is communicated with an external gas pipe, and an openable cover is arranged at the bottom of the carbonization furnace.

[0010] It also includes a tail gas treatment tank, and the top parts of the combustion chamber and the carbonization furnace are respectively communicated with the tail gas treatment tank through a second exhaust pipe and a first exhaust pipe.

[0011] It also includes a filter, the tail gas treatment tank is communicated with the filter through a third exhaust pipe, and one side of the filter is communicated with the burner through an air extraction pump and an air delivery pipe.

[0012] It further includes a straw pretreatment mechanism.

[0013] As a further preference, the straw pretreatment mechanism includes a crushing box, in which a rotatable crusher is provided. An inlet is provided at the top of the crushing box, and a feeding pipe is provided at the bottom of the crushing box. The bottom of the feeding pipe communicates with the inlet at the top of the carbonization furnace.

[0014] As a further preference, a rotatable screw feeding shaft is provided in the feeding pipe, and the screw feeding shaft is driven by an external motor.

[0015] As a further preference, an independent first treatment chamber and a second treatment chamber are respectively provided in the tail gas treatment tank. Liquid inlets and waste discharge ports are provided on both the first treatment chamber and the second treatment chamber. The first treatment chamber and the second treatment chamber communicate with the first discharge pipe and the second discharge pipe respectively.

[0016] As a further preference, a partition is provided in the filter, and the filter is divided into a first filter chamber and a second filter chamber by the partition. The first filter chamber communicates with the first treatment chamber, and the second filter chamber communicates with the second treatment chamber. Activated carbon filter layers are provided in both the first filter chamber and the second filter chamber. An exhaust port is provided on one side of the second filter chamber.

[0017] As a further preference, the burner communicates with an external gas supply pipe.

[0018] (III) Beneficial effects

[0019] The utility model provides a straw carbonization device, which has the following beneficial effects:

[0020] In this straw carbonization device, by providing a tail gas treatment tank and a filter mechanism, the tail gas in the carbonization furnace and the tail gas in the combustion chamber are simultaneously and independently treated. After the tail gas in the carbonization furnace is purified and filtered, it is transported to the burner through an air extraction pump and a pipeline, and the combustible gas therein is burned to provide heat value for the carbonization furnace, thereby improving the utilization rate of the tail gas. Secondly, after the tail gas in the combustion chamber is purified and filtered, its harmful components are eliminated before being discharged, reducing pollution. Description of the drawings

[0021] Figure 1 is a schematic structural diagram of the utility model;

[0022] Figure 2 is a schematic structural diagram of the tail gas treatment tank of the utility model.

[0023] In the figure: 1, combustion chamber; 2, carbonization furnace; 3, burner; 4, gas pipe; 5, cover; 6, tail gas treatment tank; 61, first treatment chamber; 62, second treatment chamber; 63, liquid inlet; 64, waste discharge port; 7, filter; 71, partition board; 72, first filtration chamber; 73, second filtration chamber; 74, activated carbon filter layer; 75, exhaust port; 8, first exhaust pipe; 9, second exhaust pipe; 10, air extraction pump; 11, gas transmission pipe; 12, gas supply pipe; 13, third exhaust pipe; 14, crushing box; 15, crusher; 16, feed inlet; 17, material conveying pipe; 18, feeding port; 19, spiral feeding shaft; 20, motor. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0025] As Figure 1 shown, the present invention provides a technical solution: a straw carbonization device, including a closed combustion chamber 1, a carbonization furnace 2 is arranged in the combustion chamber 1, a burner 3 is arranged at the bottom of the carbonization furnace 2, the burner 3 is communicated with an external gas supply pipe 12, in order to make the burner 3 burn more fully, air is supplemented through the gas supply pipe 12 to achieve the purpose of assisting combustion, the burner 3 is communicated with an external gas pipe 4, a closable cover 5 is arranged at the bottom of the carbonization furnace 2, and the carbonized material can be cleaned by opening the cover 5.

[0026] As Figure 1 shown, it further includes a tail gas treatment tank 6, the tops of the combustion chamber 1 and the carbonization furnace 2 are respectively communicated with the tail gas treatment tank 6 through the second exhaust pipe 9 and the first exhaust pipe 8.

[0027] As Figure 2 shown, independent first treatment chamber 61 and second treatment chamber 62 are respectively arranged in the tail gas treatment tank 6, liquid inlets 63 and waste discharge ports 64 are arranged on both the first treatment chamber 61 and the second treatment chamber 62, the waste liquid is discharged through the waste discharge port 64, and the first treatment chamber 61 and the second treatment chamber 62 are respectively communicated with the first exhaust pipe 8 and the second exhaust pipe 9.

[0028] It further includes a filter 7, the tail gas treatment tank 6 is communicated with the filter 7 through the third exhaust pipe 13 (there are two groups), and one side of the filter 7 is communicated with the burner 3 through an air extraction pump 10 and a gas transmission pipe 11.

[0029] A partition plate 71 is arranged inside the filter 7. The partition plate 71 divides the filter 7 into a first filter chamber 72 and a second filter chamber 73. The first filter chamber 72 communicates with the first treatment chamber 61, and the second filter chamber 73 communicates with the second treatment chamber 62. Activated carbon filter layers 74 are arranged in both the first filter chamber 72 and the second filter chamber 73. An exhaust port 75 is arranged on one side of the second filter chamber 73. During the whole process, the tail gas in the carbonization furnace 2 and the tail gas in the combustion chamber 1 do not come into contact with each other, belonging to separate and synchronous treatment.

[0030] It further includes a straw pretreatment mechanism. The straw pretreatment mechanism includes a crushing box 14. A rotatable crusher 15 is arranged inside the crushing box 14. A feed inlet 16 is arranged at the top of the crushing box 14, and a feed pipe 17 is arranged at the bottom of the crushing box 14. The bottom of the feed pipe 17 communicates with the feed inlet 18 at the top of the carbonization furnace 2.

[0031] A rotatable spiral feed shaft 19 is arranged inside the feed pipe 17. The spiral feed shaft 19 is driven by an external motor 20.

[0032] The straw enters the crushing box 14 through the feed inlet 16, is crushed by the crusher 15 (the motor and the crushing shaft), and then is sent into the carbonization furnace 2 through the feed pipe 17. The motor 20 is started to drive the spiral feed shaft 19 to rotate, thus facilitating the feeding.

[0033] Meanwhile, the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0034] During use, the pretreated straw material enters the carbonization furnace 2. After the burner 3 is ignited, it heats the carbonization furnace 2, thereby carbonizing the straw in the carbonization furnace 2.

[0035] The tail gas generated in the carbonization furnace 2 enters the first treatment chamber 61 in the tail gas treatment tank 6 through the first exhaust pipe 8. A slightly alkaline liquid is contained in the first treatment chamber 61, which can wash the tail gas, thereby absorbing the tar component in the tail gas. Then the tail gas passes through the activated carbon filter layer 74 in the first filter chamber 72 of the filter 7 to filter out the dust and the like. Finally, the tail gas mainly contains carbon monoxide, methane, and hydrogen. This part of the tail gas is finally fed back to the burner 3 through the air extraction pump 10 and the gas transmission pipe 11 for the burner 3 to burn, thereby providing heat value for the carbonization furnace 2.

[0036] The tail gas generated in the combustion chamber 1 enters the second treatment chamber 62 in the tail gas treatment tank 6 through the second exhaust pipe 9. An alkaline absorbent is contained in the second treatment chamber 62, which can absorb a small amount of harmful components such as sulfur dioxide and nitrogen oxides in the tail gas (forming nitrates and sulfates). Then the tail gas enters the second filter chamber 73 to filter out the dust impurities, and finally is harmlessly discharged through the exhaust port 75.

[0037] In summary, for this straw carbonization device, by setting up a tail gas treatment tank and a filter mechanism, the tail gas in the carbonization furnace and the tail gas in the combustion chamber are simultaneously and independently treated. After the tail gas in the carbonization furnace is purified and filtered, it is transported to the burner through an air extraction pump and a pipeline, and the combustible gas therein is burned to provide heat value for the carbonization furnace, thereby improving the utilization rate of the tail gas. Secondly, after the tail gas in the combustion chamber is purified and filtered, its harmful components are eliminated before being discharged, reducing pollution.

[0038] It should be noted that the electrical components mentioned in this article are all electrically connected to an external main controller and 220V or 380V mains electricity. And the main controller can be a conventional known device such as a computer that plays a control role. Its control principle, internal structure, and control switch method are all conventional means of the existing technology and are directly cited here without elaboration. In this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device.

[0039] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A straw carbonization device, characterized in that: It includes an enclosed combustion chamber (1), in which a carbonization furnace (2) is arranged. A burner (3) is provided at the bottom of the carbonization furnace (2), and the burner (3) is connected to an external gas pipe (4). A closable cover (5) is provided at the bottom of the carbonization furnace (2). It further includes an exhaust gas treatment tank (6). The top parts of the combustion chamber (1) and the carbonization furnace (2) are respectively connected to the exhaust gas treatment tank (6) through a second exhaust pipe (9) and a first exhaust pipe (8). It further includes a filter (7). The exhaust gas treatment tank (6) is connected to the filter (7) through a third exhaust pipe (13). One side of the filter (7) is connected to the burner (3) through an air extraction pump (10) and an air delivery pipe (11). It further includes a straw pretreatment mechanism.

2. The straw carbonization device according to claim 1, characterized in that: The straw pretreatment mechanism includes a crushing box (14). A rotatable crusher (15) is arranged in the crushing box (14). A feed inlet (16) is provided at the top of the crushing box (14). A feed pipe (17) is provided at the bottom of the crushing box (14), and the bottom of the feed pipe (17) is connected to a feed inlet (18) at the top of the carbonization furnace (2).

3. The straw carbonization device according to claim 2, characterized in that: A rotatable spiral feed shaft (19) is arranged in the feed pipe (17), and the spiral feed shaft (19) is driven by an external motor (20).

4. The straw carbonization device according to claim 1, characterized in that: Independent first treatment chamber (61) and second treatment chamber (62) are respectively arranged in the exhaust gas treatment tank (6). Liquid inlets (63) and waste discharge ports (64) are provided on both the first treatment chamber (61) and the second treatment chamber (62). The first treatment chamber (61) and the second treatment chamber (62) are respectively connected to the first exhaust pipe (8) and the second exhaust pipe (9).

5. The straw carbonization device according to claim 4, characterized in that: A partition plate (71) is arranged in the filter (7), and the partition plate (71) divides the filter (7) into a first filtration chamber (72) and a second filtration chamber (73). The first filtration chamber (72) is connected to the first treatment chamber (61), and the second filtration chamber (73) is connected to the second treatment chamber (62). Activated carbon filter layers (74) are arranged in both the first filtration chamber (72) and the second filtration chamber (73). An exhaust port (75) is provided on one side of the second filtration chamber (73).

6. The straw carbonization device according to claim 1, characterized in that: The burner (3) is connected to an external gas supply pipe (12).

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