Efficient and energy-saving grain warehouse nitrogen filling and tail gas utilization device

Abstract

The utility model relates to a kind of high-efficient energy-saving granary nitrogen filling exhaust gas utilization device, especially in the technical field of grain storage equipment.The utility model includes several nitrogen filling units and recycling pipe connected between adjacent two nitrogen filling units to realize tail gas recycling, the nitrogen filling unit includes nitrogen filling pipe, exhaust manifold, exhaust branch pipe, air pump, connecting pipe, the other side in the middle part of exhaust manifold is communicated with the side of nitrogen filling pipe by the connecting pipe, the lower side between every adjacent two exhaust manifold is communicated by the recycling pipe;By constructing the channel connected with another granary, tail gas can be used twice, used to replace the air in another granary, to realize the efficient use of nitrogen, achieve the purpose of energy saving.

Description

Technical Field

[0001] This utility model relates to the technical field of grain storage equipment, and in particular to a high-efficiency and energy-saving grain silo nitrogen-filled tail gas regulation device. Background Technology

[0002] To implement the concept of green grain storage, modern grain silos mostly adopt nitrogen-filled controlled atmosphere storage technology to achieve a dual improvement in pest control and quality preservation. In the application of nitrogen-filled controlled atmosphere storage technology, the traditional method involves replacing the air in the grain silo with a high concentration of nitrogen, and then directly discharging the mixture of nitrogen and air (exhaust gas). This exhaust gas still contains a high proportion of nitrogen (typically 70%-90%), and direct emission results in a significant waste of nitrogen resources and nitrogen production energy, leading to high operating costs and failing to meet green energy-saving requirements. Utility Model Content

[0003] (1) Technical solution

[0004] To address the aforementioned technical problems, this utility model provides a highly efficient and energy-saving nitrogen-filled modified atmosphere tail gas utilization device for grain silos. It includes several nitrogen-filling units and a recovery pipe connected between adjacent nitrogen-filling units to achieve tail gas recovery and utilization. Each nitrogen-filling unit includes a nitrogen-filling pipe, a main exhaust pipe, exhaust branch pipes, an air pump, and a connecting pipe. One end of the nitrogen-filling pipe is connected to the bottom of the grain silo, and the other end is connected to a nitrogen generator. One end of the main exhaust pipe is connected to a pipe opening at the top of the grain silo, and the other end is an exhaust port. The air pump is installed on the main exhaust pipe. The exhaust branch pipe is connected to the upper side of the main exhaust pipe, and the other side of the middle section of the main exhaust pipe is connected to one side of the nitrogen-filling pipe via the connecting pipe. The lower sides of every two adjacent main exhaust pipes are connected via the recovery pipe.

[0005] Preferably, a first solenoid valve is provided on the lower part of the nitrogen filling pipe.

[0006] Preferably, a second solenoid valve is provided on the main exhaust pipe between the exhaust branch pipe and the connecting pipe.

[0007] Preferably, a third solenoid valve is provided at the exhaust port.

[0008] Preferably, a fourth solenoid valve is provided on the exhaust manifold.

[0009] Preferably, a fifth solenoid valve is provided on the connecting pipe.

[0010] Preferably, a sixth solenoid valve is provided at one end of the recovery pipe, and a seventh solenoid valve is provided at the other end of the recovery pipe.

[0011] (2) Beneficial effects

[0012] This invention provides a highly efficient and energy-saving nitrogen-filled grain silo tail gas regulation and utilization device. Compared with the prior art, this invention has the following advantages:

[0013] (1) By constructing a channel connected to another grain warehouse, the exhaust gas can be reused to replace the air in the other grain warehouse, thereby achieving efficient utilization of nitrogen and achieving the purpose of energy saving and cost reduction. In response to the energy consumption optimization needs of nitrogen-filled operation, the traditional direct exhaust mode is broken through. By improving and innovating the utilization method of nitrogen-filled gas to regulate exhaust gas, efficient utilization of nitrogen is achieved, and energy saving and cost reduction are achieved.

[0014] (2) By setting multiple solenoid valves (first, second, third, fourth, sixth and seventh solenoid valves) at key nodes (nitrogen filling pipe, each exhaust outlet and recovery pipe), the airflow path can be accurately switched and controlled in different working stages such as nitrogen filling, exhaust gas recovery and final exhaust. It is convenient to operate and has high reliability. Attached Figure Description

[0015] Figure 1 Diagram of nitrogen filling pipeline for grain silos in existing technology.

[0016] Figure 2 This is a diagram of the nitrogen filling pipeline for the grain silo according to this utility model.

[0017] The attached diagram is labeled as follows: 1-Nitrogen filling pipe, 11-First solenoid valve, 2-Exhaust main pipe, 21-Exhaust port, 22-Second solenoid valve, 23-Third solenoid valve, 3-Exhaust branch pipe, 31-Fourth solenoid valve, 4-Air pump, 5-Connecting pipe, 51-Fifth solenoid valve, 6-Recovery pipe, 61-Sixth solenoid valve, 62-Seventh solenoid valve. Detailed Implementation

[0018] The present invention will be further described in conjunction with the accompanying drawings and embodiments.

[0019] like Figure 1 , 2 As shown, the present invention discloses a high-efficiency and energy-saving nitrogen-filled controlled atmosphere tail gas utilization device for grain silos, comprising several nitrogen-filling units and a recovery pipe 6 connected between two adjacent nitrogen-filling units to realize tail gas recovery and utilization. The nitrogen-filling unit includes a nitrogen-filling pipe 1, an exhaust main pipe 2, an exhaust branch pipe 3, an air pump 4, and a connecting pipe 5. One end of the nitrogen-filling pipe 1 is connected to the bottom of the grain silo, and the other end is connected to a nitrogen generator. One end of the exhaust main pipe 2 is connected to the pipe opening at the top of the grain silo, and the other end of the exhaust main pipe 2 is an exhaust port 21. The air pump 4 is installed on the exhaust main pipe 2. The exhaust branch pipe 3 is connected to the upper side of the exhaust main pipe 2. The other side of the middle part of the exhaust main pipe 2 is connected to one side of the nitrogen-filling pipe 1 through the connecting pipe 5. The lower sides of each two adjacent exhaust main pipes 2 are connected through the recovery pipe 6.

[0020] A first solenoid valve 11 is provided on the lower part of the nitrogen filling pipe 1, and a second solenoid valve 22 is provided on the exhaust main pipe 2 between the exhaust branch pipe 3 and the connecting pipe 5.

[0021] A third solenoid valve 23 is provided at the exhaust port 21, a fourth solenoid valve 31 is provided on the exhaust branch pipe 3, a fifth solenoid valve 51 is provided on the connecting pipe 5, a sixth solenoid valve 61 is provided at one end of the recovery pipe 6, and a seventh solenoid valve 62 is provided at the other end of the recovery pipe 6.

[0022] Assumption Figure 2 The nitrogen filling unit on the right is the nitrogen filling pipeline for grain silo #2. Figure 2 The nitrogen filling unit on the left is the nitrogen filling pipeline for grain silo #1.

[0023] 1. Solenoid valve on / off status during normal nitrogen charging:

[0024] #1 Grain Silo: First solenoid valve 11 is open, second solenoid valve 22 and third solenoid valve 23 are open, fourth solenoid valve 31 is open, fifth solenoid valve 51 is closed, and air pump 4 is turned on. High-concentration nitrogen from the nitrogen generator enters the bottom of the silo through the first solenoid valve 11, penetrates the grain layer, reaches the grain surface, and is then extracted by air pump 4 through the inlet on the grain surface. It is discharged outside the silo through the pipelines of the second solenoid valve 22, the third solenoid valve 23 and the fourth solenoid valve 31.

[0025] #2 Grain Silo: First solenoid valve 11 is open, second solenoid valve 22 and third solenoid valve 23 are open, fourth solenoid valve 31 is open, fifth solenoid valve 51 is closed, and air pump 4 is turned on. High-concentration nitrogen from the nitrogen generator enters the bottom of the silo through the first solenoid valve 11, penetrates the grain layer, and reaches the grain surface. The nitrogen then enters the pipe on the grain surface and is extracted by air pump 4, and discharged outside the silo through the pipes of the second solenoid valve 22, the third solenoid valve 23 and the fourth solenoid valve 31.

[0026] 2. Solenoid valve on / off status during exhaust gas utilization:

[0027] The first solenoid valve 11 of grain silo #2 is open, the fifth solenoid valve 51 of grain silo #2 is closed, the air pump 4 of grain silo #2 is open, the fourth solenoid valve 31 of grain silo #2 is closed, the second solenoid valve 22 of grain silo #2 is open, the third solenoid valve 23 of grain silo #2 is closed, the newly added seventh solenoid valve 62 of grain silo #2 is open, the newly added sixth solenoid valve 61 of grain silo #1 is open, the third solenoid valve 23 and the second solenoid valve 22 of grain silo #1 are closed, the fifth solenoid valve 51 of grain silo #1 is open, the first solenoid valve 11 of grain silo #1 is closed, and the fourth solenoid valve 31 of grain silo #1 is temporarily closed. The exhaust gas from grain silo #2 enters the bottom of grain silo #1, then penetrates the grain layer, driving oxygen and carbon dioxide to the grain surface. After a period of time, the air pump 4 and the fourth solenoid valve 31 of grain silo #1 are opened to discharge oxygen and carbon dioxide, thereby using the nitrogen discharged from grain silo #2 to increase the initial nitrogen concentration in grain silo #1. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0028] The embodiments described above are merely preferred embodiments of the present invention, and are described in a relatively specific and detailed manner. However, the present invention is not limited to these embodiments. It should be noted that for those skilled in the art, any improvements made without departing from the spirit of the present invention fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A high-efficiency and energy-saving nitrogen-filled grain silo tail gas regulation and utilization device, characterized in that, The system includes several nitrogen filling units and a recovery pipe (6) connecting two adjacent nitrogen filling units to realize the recovery and utilization of exhaust gas. The nitrogen filling unit includes a nitrogen filling pipe (1), an exhaust main pipe (2), an exhaust branch pipe (3), an air pump (4), and a connecting pipe (5). One end of the nitrogen filling pipe (1) is connected to the bottom of the grain silo, and the other end of the nitrogen filling pipe (1) is connected to a nitrogen generator. One end of the exhaust main pipe (2) is connected to the pipe opening at the top of the grain silo, and the other end of the exhaust main pipe (2) is an exhaust port (21). The air pump (4) is installed on the exhaust main pipe (2). The exhaust branch pipe (3) is connected to the upper side of the exhaust main pipe (2). The other side of the middle part of the exhaust main pipe (2) is connected to one side of the nitrogen filling pipe (1) through the connecting pipe (5). The lower sides of each two adjacent exhaust main pipes (2) are connected through the recovery pipe (6).

2. The high-efficiency and energy-saving grain silo nitrogen-filling tail gas regulation and utilization device according to claim 1, characterized in that, The nitrogen filling pipe (1) is provided with a first solenoid valve (11) at the lower part.

3. The high-efficiency and energy-saving grain silo nitrogen-filling tail gas regulation and utilization device according to claim 1, characterized in that, A second solenoid valve (22) is provided on the main exhaust pipe (2) between the exhaust branch pipe (3) and the connecting pipe (5).

4. The high-efficiency and energy-saving grain silo nitrogen-filling tail gas regulation and utilization device according to claim 1, characterized in that, A third solenoid valve (23) is provided at the exhaust port (21).

5. A high-efficiency and energy-saving grain silo nitrogen-filling and tail gas regulation and utilization device according to claim 1, characterized in that, The exhaust manifold (3) is equipped with a fourth solenoid valve (31).

6. The high-efficiency and energy-saving grain silo nitrogen-filling tail gas regulation and utilization device according to claim 1, characterized in that, The connecting pipe (5) is equipped with a fifth solenoid valve (51).

7. A high-efficiency and energy-saving grain silo nitrogen-filling and tail gas regulation and utilization device according to claim 1, characterized in that, A sixth solenoid valve (61) is provided at one end of the recovery pipe (6), and a seventh solenoid valve (62) is provided at the other end of the recovery pipe (6).

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