Gasifier with cold energy recovery device

Abstract

The utility model relates to the technical field of liquid oxygen gasification, in particular to a gasifier with a cooling capacity recovery device, which comprises a first box body, a first heat exchange pipeline is arranged in the first box body, a first partition plate and a second partition plate are arranged in the second box body at intervals from bottom to top, and a through hole is formed in the first partition plate. The first box body is communicated with a middle-layer cavity of the second box body through a first connecting pipe, a first circulating pump is arranged on the first connecting pipe, the first box body is communicated with a lower-layer cavity of the second box body through a second connecting pipe, a second heat exchange pipeline is arranged in an upper-layer cavity, and the two ends of the second heat exchange pipeline penetrate through second partition plates respectively. A second circulating pump is arranged on the second heat exchange pipeline, a temperature sensor is arranged in the upper-layer cavity, and the temperature sensor and the second circulating pump are electrically connected with a controller.

Description

Technical Field

[0001] This utility model relates to the field of liquid oxygen vaporization technology, specifically to a vaporizer with a cold energy recovery device. Background Technology

[0002] In wastewater treatment, liquid oxygen is widely used for treating high-load industrial wastewater, enhancing activated sludge processes, and emergency remediation due to its high purity and efficient oxygen supply capacity. However, existing liquid oxygen application technologies suffer from significant energy waste: before entering the wastewater treatment system, liquid oxygen must undergo gasification, transforming from a liquid state into gaseous oxygen. This process absorbs a large amount of ambient heat, causing a sharp drop in temperature between the gasification device and the surrounding environment, generating a large amount of unused cold energy. Currently, most wastewater treatment plants rely solely on natural heat exchange or simple electric heating for gasification, without recovering the cold energy released during the gasification process, resulting in energy waste. Utility Model Content

[0003] To address the aforementioned technical deficiencies, this invention provides a vaporizer with a cold energy recovery device, capable of recovering the cold energy generated during the vaporization of liquid oxygen.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows: A vaporizer with a cold energy recovery device includes a first chamber and a second chamber. A first heat exchange pipe is installed inside the first chamber. One end of the first heat exchange pipe passes through the first chamber and connects to a liquid oxygen pipe, while the other end passes through the first chamber and connects to a gaseous oxygen pipe. A pressure reducing valve is installed on the gaseous oxygen pipe. A first partition and a second partition are installed at intervals from bottom to top inside the second chamber, dividing the interior of the second chamber into a lower chamber, a middle chamber, and an upper chamber. A through hole is provided on the first partition. The top of the first chamber is connected to the second chamber via a first connecting pipe. The middle chamber is connected, and a first circulation pump is installed on the first connecting pipe. The bottom of the first box is connected to the lower chamber of the second box through the second connecting pipe. The upper chamber is equipped with a second heat exchange pipe, and the two ends of the second heat exchange pipe pass through the second partition. A second circulation pump is installed on the second heat exchange pipe. A temperature sensor is installed in the upper chamber. The temperature sensor and the second circulation pump are electrically connected to a controller. The chamber also includes a third heat exchange pipe and a fourth heat exchange pipe. The two ends of the third heat exchange pipe are connected to the upper chamber, and a third circulation pump is installed on the third heat exchange pipe. The two ends of the fourth heat exchange pipe are connected to the lower chamber, and a fourth circulation pump is installed on the fourth heat exchange pipe.

[0005] The principle of the above technical solution is as follows: a refrigerant is placed in the No. 1 and No. 2 chambers. Liquid oxygen is vaporized into gaseous oxygen in the No. 1 heat exchange pipe, absorbing the heat from the refrigerant in the No. 1 chamber. The low-temperature refrigerant is circulated to the lower and middle chambers of the No. 2 chamber by the No. 1 circulation pump, keeping the refrigerant in the lower and middle chambers at a low temperature. At the same time, the temperature of the refrigerant in the upper chamber is controlled by the No. 2 heat exchange pipe, the No. 2 circulation pump, the controller, and the temperature sensor, resulting in two different temperatures of refrigerant in the lower and upper chambers. By placing the No. 3 heat exchange pipe in the anaerobic digester and cooperating with the No. 3 circulation pump, the refrigerant in the upper chamber can be used for temperature control in anaerobic digestion. By placing the No. 4 heat exchange pipe in the sludge low-temperature drying chamber and cooperating with the No. 4 circulation pump, the refrigerant in the lower chamber can be used to reduce the humidity of the drying air during the sludge low-temperature drying process, thereby improving the evaporation efficiency.

[0006] To better stabilize the temperature of the refrigerant in the lower and upper chambers, partitions No. 1 and No. 2 are made of heat-insulating plates.

[0007] To reduce heat exchange between the refrigerant inside the No. 1 and No. 2 containers and the outside environment, insulation layers are installed on the outside of the No. 1 and No. 2 containers.

[0008] To prevent liquid oxygen from vaporizing prematurely, heat insulation sleeves are installed on the liquid oxygen pipeline and at the connection between the liquid oxygen pipeline and the No. 1 heat exchange pipeline.

[0009] The gasifier with a cold energy recovery device obtained by this invention has the following advantages: it can effectively recover the cold energy during liquid oxygenation and ensure that the cold energy is distributed as needed, forming a medium-temperature refrigerant in the upper chamber and a low-temperature refrigerant in the lower chamber, realizing the cascade utilization of energy. The medium-temperature refrigerant in the upper chamber can be used for temperature control in anaerobic digestion, and the low-temperature refrigerant in the lower chamber can optimize the sludge drying process, reduce air humidity, and improve evaporation efficiency. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model. Detailed Implementation

[0011] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0012] Example 1:

[0013] like Figure 1As shown, this utility model discloses a vaporizer with a cold energy recovery device, including a first housing 3 and a second housing 6. Both housings 3 and 6 are externally covered with a heat insulation layer 12. A first heat exchange pipe 4 is installed inside the first housing 3. One end of the first heat exchange pipe 4 passes through the first housing 3 and connects to a liquid oxygen pipe 1. A heat insulation sleeve 2 is fitted over the liquid oxygen pipe 1 and the connection point between the liquid oxygen pipe 1 and the first heat exchange pipe 4. The other end of the pipeline 4 passes through the first chamber 3 and connects to the oxygen pipeline 20. A pressure reducing valve 24 is installed on the oxygen pipeline 20. Inside the second chamber 6, a first partition 9 and a second partition 14 are installed at intervals from bottom to top. The first partition 9 and the second partition 14 are made of heat-insulating panels. The first partition 9 and the second partition 14 divide the interior of the second chamber 6 into a lower chamber 7, a middle chamber 21, and an upper chamber 17. A through hole 8 is provided on the first partition 9. The top of housing 3 is connected to the middle chamber 21 of housing 6 via connecting pipe 22. A circulating pump 23 is installed on connecting pipe 22. The bottom of housing 3 is connected to the lower chamber 7 of housing 6 via connecting pipe 5. A heat exchange pipe 15 is installed in the upper chamber 17. Both ends of heat exchange pipe 15 pass through partition 14. A circulating pump 13 is installed on heat exchange pipe 15. 3. A temperature sensor 18 is installed in the upper chamber 17. The temperature sensor 18 and the second circulation pump 13 are electrically connected to a controller. The chamber also includes a third heat exchange pipe 16 and a fourth heat exchange pipe 11. The two ends of the third heat exchange pipe 16 are connected to the upper chamber 17. A third circulation pump 19 is installed on the third heat exchange pipe 16. The two ends of the fourth heat exchange pipe 11 are connected to the lower chamber 7. A fourth circulation pump 10 is installed on the fourth heat exchange pipe 11.

[0014] The principle of the above technical solution is as follows: A refrigerant is placed in the first chamber 3 and the second chamber 6. Liquid oxygen is vaporized into gaseous oxygen in the first heat exchange pipe 4, absorbing heat from the refrigerant in the first chamber 3. The low-temperature refrigerant is then circulated to the lower chamber 7 and the middle chamber 21 of the second chamber 6 by the first circulation pump 23, keeping the refrigerant in the lower chamber 7 and the middle chamber 21 at a low temperature. Simultaneously, the temperature is controlled by the second heat exchange pipe 15, the second circulation pump 13, the controller, and the temperature sensor 18. The refrigerant temperature in the upper chamber 17 creates two different refrigerant temperatures in the lower chamber 7 and the upper chamber 17. By setting the No. 3 heat exchange pipe 16 in the anaerobic digester and cooperating with the No. 3 circulation pump 19, the refrigerant in the upper chamber 17 can be used for temperature control in anaerobic digestion. By setting the No. 4 heat exchange pipe 11 in the sludge low-temperature drying chamber and cooperating with the No. 4 circulation pump 10, the refrigerant in the lower chamber 7 can be used to reduce the humidity of the drying air and improve the evaporation efficiency during the sludge low-temperature drying process.

Claims

1. A gasifier with cold energy recovery device, characterized by, The system includes a first housing (3) and a second housing (6). The first housing (3) contains a first heat exchange pipeline (4). One end of the first heat exchange pipeline (4) passes through the first housing (3) and connects to the liquid oxygen pipeline (1). The other end of the first heat exchange pipeline (4) passes through the first housing (3) and connects to the gaseous oxygen pipeline (20). A pressure reducing valve (24) is installed on the gaseous oxygen pipeline (20). The second housing (6) contains, from bottom to top, spaced... Partition 1 (9) and Partition 2 (14) divide the interior of Box 2 (6) into a lower chamber (7), a middle chamber (21), and an upper chamber (17). Partition 1 (9) has a through hole (8). The top of Box 1 (3) is connected to the middle chamber (21) of Box 2 (6) through a connecting pipe (22). The connecting pipe (22) has a No. 1... A circulating pump (23) is installed in the upper chamber (17). The bottom of the first chamber (3) is connected to the lower chamber (7) of the second chamber (6) via a second connecting pipe (5). A second heat exchange pipe (15) is installed in the upper chamber (17). The two ends of the second heat exchange pipe (15) pass through the second partition (14). A second circulating pump (13) is installed on the second heat exchange pipe (15). A temperature sensor (18) is installed in the upper chamber (17). The temperature... The sensor (18) and the second circulating pump (13) are electrically connected to a controller. The system also includes a third heat exchange pipeline (16) and a fourth heat exchange pipeline (11). The two ends of the third heat exchange pipeline (16) are connected to the upper chamber (17). A third circulating pump (19) is installed on the third heat exchange pipeline (16). The two ends of the fourth heat exchange pipeline (11) are connected to the lower chamber (7). A fourth circulating pump (10) is installed on the fourth heat exchange pipeline (11).

2. The gasifier with cold energy recovery device according to claim 1, characterized in that, The first partition (9) and the second partition (14) are made of heat insulation board.

3. The gasifier with cold energy recovery device according to claim 1 or 2, characterized in that, The exterior of the No. 1 box (3) and the No. 2 box (6) is provided with a heat insulation layer (12).

4. The gasifier with cold energy recovery device according to claim 1 or 2, characterized in that, A heat insulation sleeve (2) is installed at the connection between the liquid oxygen pipeline (1) and the No. 1 heat exchange pipeline (4).

5. The gasifier with cold energy recovery device according to claim 3, characterized in that, A heat insulation sleeve (2) is installed at the connection between the liquid oxygen pipeline (1) and the No. 1 heat exchange pipeline (4).

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