A device and method for improving condensate utilization efficiency

Abstract

The present invention discloses a device for improving the utilization efficiency of condensate, comprising a condensate flash tank, a temperature reduction and pressure reduction system and a low-pressure steam main pipe, wherein the input end of the low-pressure steam main pipe is connected to the output end of the temperature reduction and pressure reduction system; the condensate flash tank is provided with a first gas output end, a second gas output end and a condensate output end, the first gas output end is connected to the low-pressure steam main pipe through a pipeline, the second gas output end is connected to a load branch pipeline, a connecting pipeline is provided between the load branch pipeline and the low-pressure steam main pipe, and a third regulating valve is provided on the connecting pipeline; the condensate output end is connected to the low-pressure steam main pipe through a low-pressure steam condensate pipeline, and a second regulating valve is provided at the end of the low-pressure steam condensate pipeline. The adoption of this technical solution can not only make up for the insufficient amount of low-pressure steam when the heating is put into use, but also make full use of the heat of the low-pressure steam condensate, so that the condensate can be recovered, and the utilization rate of the condensate can be fully improved, with huge economic benefits.

Description

Technical Field

[0001] The present invention belongs to the technical field of waste heat recovery and utilization, and more specifically, the present invention relates to a device and a method for improving condensate utilization efficiency. Background Art

[0002] Low-pressure steam can be used as vacuum system injection steam, heating steam, purge steam, etc. The low-pressure steam condensate is sent to the dry coke quenching workshop. However, in actual production, the low-pressure steam flashed when the heating steam is put into use cannot meet the needs of use, and low-pressure steam needs to be supplemented. This part of the low-pressure steam supplemented consumes high-pressure superheated steam. At the same time, the temperature of the external condensate is high, which will affect its normal water replenishment after being sent to the dry coke quenching. At the same time, most of the external condensate is directly discharged to the sewer, which will cause waste and generate a lot of noise. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a device for improving the condensate utilization efficiency, which is used to compensate for the insufficient amount of low-pressure steam when heating is put into use and can make full use of the heat of low-pressure steam condensate.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: a device for improving the utilization efficiency of condensate is provided, comprising a condensate flash tank, a temperature reduction and pressure reduction system and a low-pressure steam main pipe, the input end of the low-pressure steam main pipe is connected to the output end of the temperature reduction and pressure reduction system, and the low-pressure steam is transported from the temperature reduction and pressure reduction system to the low-pressure steam main pipe; the condensate flash tank is provided with a first gas output end, a second gas output end, and a condensate output end, the first gas output end is connected to the low-pressure steam main pipe through a pipeline, and the low-pressure steam is supplied to the low-pressure steam main pipe. The second gas output end is connected to the load branch pipeline, a connecting pipeline is provided between the load branch pipeline and the low-pressure steam main pipe, and a third regulating valve is provided on the connecting pipeline, and the low-pressure steam in the low-pressure steam main pipe can be replenished into the load branch pipeline through the connecting pipeline; the condensate output end is connected to the low-pressure steam main pipe through a low-pressure steam condensate pipeline, and a second regulating valve is provided at the end of the low-pressure steam condensate pipeline, and the low-pressure steam condensate in the condensate flash tank enters the low-pressure steam main pipe through the low-pressure steam condensate pipeline and the second regulating valve.

[0005] The present invention discloses a device for improving the utilization efficiency of condensate, wherein a liquid level regulating valve, a second three-way pipe and the second regulating valve are sequentially arranged on the low-pressure steam condensate pipeline along the direction in which the low-pressure steam condensate enters the low-pressure steam main pipe, a condensate external discharge pipe is arranged at the second branch water outlet of the second three-way pipe, and is fixedly connected to the condensate external discharge pipe, and a stop valve is arranged on the condensate external discharge pipe, and the low-pressure steam condensate in the condensate flash tank can enter the low-pressure steam main pipe via the liquid level regulating valve, the second three-way pipe and the second regulating valve in sequence.

[0006] The present invention discloses a device for improving the utilization efficiency of condensate, wherein the output end of the temperature reduction and pressure reduction system is provided with a first three-way pipe, and is connected to the first main water inlet of the first three-way pipe, the first gas output end is connected to the second main water inlet of the first three-way pipe, and a first regulating valve is provided between the first gas output end and the first three-way pipe, wherein the input end of the low-pressure steam main pipe is connected to the branch water outlet of the first three-way pipe, and the low-pressure steam in the condensate flash tank enters the low-pressure steam main pipe through the first regulating valve and the first three-way pipe in sequence.

[0007] The present invention discloses a device for improving the utilization efficiency of condensate. The cooling and pressure reduction system comprises a high-pressure superheated steam pipeline, a desalted water pipeline and a cooling and pressure reducing device. The two input ends of the cooling and pressure reducing device are respectively connected to the output ends of the high-pressure superheated steam pipeline and the desalted water pipeline. The output end of the cooling and pressure reducing device is connected to the first main water inlet of the first three-way pipe through a pipeline. The high-pressure superheated steam and the desalted water are converted into low-pressure steam after entering the cooling and pressure reducing device, and enter the low-pressure steam main pipe through the first three-way pipe.

[0008] The present invention discloses a device for improving the utilization efficiency of condensate. A fourth regulating valve and a fifth regulating valve are sequentially arranged on the low-pressure steam main pipe along the water conveying direction. When the low-pressure steam condensate is used, the fourth regulating valve and the stop valve are closed, and the second regulating valve is opened. The low-pressure steam condensate in the condensate flash tank enters the low-pressure steam main pipe through the liquid level regulating valve, the second three-way pipe and the second regulating valve in sequence.

[0009] The present invention discloses a device for improving the utilization efficiency of condensate, wherein a vent valve and a connecting pipe are sequentially arranged on the load branch pipeline along the water outlet direction of low-pressure steam, and the connecting pipe is arranged on the side of the fifth regulating valve away from the fourth regulating valve, so that the low-pressure steam in the low-pressure steam main pipe can supplement the low-pressure steam in the load branch pipeline.

[0010] The present invention discloses a device for improving the utilization efficiency of condensate. When low-pressure steam is used to condense, the fourth regulating valve and the stop valve are closed, the second regulating valve is opened, and the low-pressure steam condensate in the condensate flash tank enters the low-pressure steam main pipe through the liquid level regulating valve, the second three-way pipe and the second regulating valve in sequence; when low-pressure steam is supplemented to the load branch pipeline, the fourth regulating valve, the fifth regulating valve and the third regulating valve can be opened in sequence after the vent valve is opened and the second regulating valve is closed, and the low-pressure steam in the low-pressure steam main pipe can supplement the low-pressure steam in the load branch pipeline.

[0011] The present invention discloses a device for improving the utilization efficiency of condensate. The low-pressure steam output from the first gas output end of the condensate flash tank can be directly transported to the low-pressure steam main pipe through the first three-way pipe, or the first regulating valve can be closed to allow the low-pressure steam to be directly transported to the load branch pipeline.

[0012] The present invention discloses a device for improving the utilization efficiency of condensate. A liquid level regulating valve, a second three-way pipe and the second regulating valve are sequentially arranged on the low-pressure steam condensate pipeline along the direction in which the low-pressure steam condensate enters the low-pressure steam main pipe. A condensate external discharge pipe is arranged at the second branch water outlet of the second three-way pipe and is fixedly connected to the condensate external discharge pipe. A stop valve is arranged on the condensate external discharge pipe. When the low-pressure steam condensate is used, the fourth regulating valve and the stop valve are closed, and the second regulating valve is opened. The low-pressure steam condensate in the condensate flash tank enters the low-pressure steam main pipe via the liquid level regulating valve, the second three-way pipe and the second regulating valve in sequence, which can make up for the insufficient amount of low-pressure steam when the heating is put into use, so that the heat of the low-pressure steam condensate can be fully utilized and the condensate can be recovered.

[0013] By adopting the technical scheme, after the transformation, a liquid level regulating valve, a second three-way pipe and a second regulating valve are sequentially arranged on the low-pressure steam condensate pipeline along the direction in which the low-pressure steam condensate enters the low-pressure steam main pipe, a condensate external discharge pipe is arranged at the second branch water outlet of the second three-way pipe, and is fixedly connected to the condensate external discharge pipe, and a stop valve is arranged on the condensate external discharge pipe, and the low-pressure steam condensate in the condensate flash tank can enter the low-pressure steam main pipe through the liquid level regulating valve, the second three-way pipe and the second regulating valve in sequence, and superheated steam can be saved when heating is used in winter, a large amount of superheated steam can be saved, and costs can be saved. After the transformation, the condensate temperature is reduced, and it can be sent to dry quenching for recycling after a little cooling, which can fully improve the utilization rate of the condensate and has huge economic benefits.

[0014] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The following is a brief description of the contents and symbols in the drawings of this specification:

[0016] Figure 1 A schematic diagram of a device for improving condensate utilization efficiency according to the present invention;

[0017] Figure 2 A schematic diagram of the working process of a device for improving the utilization efficiency of condensate according to the present invention;

[0018] The following are marked in the figure: 1. condensate flash tank; 2. first regulation; 3. vent valve; 4. second regulating valve; 5. third regulating valve; 6. fourth regulating valve; 7. fifth regulating valve; 8. liquid level regulating valve; 9. stop valve; 10. temperature and pressure reducer; 11. desalted water pipeline; 12. high-pressure superheated steam pipeline; 13. low-pressure steam main; 14. load branch pipeline; 15. low-pressure steam condensate pipeline; 16. condensate discharge pipe; 17. first tee pipe; 18. second tee pipe. DETAILED DESCRIPTION

[0019] The following, with reference to the accompanying drawings, provides a further detailed description of the specific implementation methods of the present invention, such as the shapes and structures of the components involved, the relative positions and connection relationships between the components, the functions and working principles of the components, the manufacturing process and the operating methods, so as to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention.

[0020] Figure 1 The schematic diagram of a device for improving the utilization efficiency of condensate of the present invention; as shown in the figure, the device for improving the utilization efficiency of condensate of the present invention comprises a condensate flash tank 1, a temperature reduction and pressure reduction system and a low-pressure steam main pipe 13, the input end of the low-pressure steam main pipe 13 is connected to the output end of the temperature reduction and pressure reduction system, and the low-pressure steam is transported from the temperature reduction and pressure reduction system to the low-pressure steam main pipe 13; the condensate flash tank 1 is provided with a first gas output end, a second gas output end, and a condensate output end, the first gas output end is connected to the low-pressure steam main pipe 13 through a pipeline, and the low-pressure steam is supplied to the low-pressure steam main pipe 13; The second gas output end is connected to the load branch pipeline 14, a connecting pipeline is arranged between the load branch pipeline 14 and the low-pressure steam main pipe 13, and a third regulating valve 5 is arranged on the connecting pipeline, and the low-pressure steam in the low-pressure steam main pipe 13 can be replenished to the load branch pipeline 14 through the connecting pipeline; the condensate output end is connected to the low-pressure steam main pipe 14 through a low-pressure steam condensate pipeline 15, and a second regulating valve 4 is arranged at the end of the low-pressure steam condensate pipeline 15, and the low-pressure steam condensate in the condensate flash tank 1 enters the low-pressure steam main pipe 13 through the low-pressure steam condensate pipeline 15 and the second regulating valve 4.

[0021] In the above, a liquid level regulating valve 8, a second three-way pipe 18 and a second regulating valve 4 are sequentially arranged on the low-pressure steam condensate pipeline 15 along the direction in which the low-pressure steam condensate enters the low-pressure steam main pipe 13. A condensate external discharge pipe 16 is arranged at the second branch outlet of the second three-way pipe 18 and is fixedly connected to the condensate external discharge pipe 16. A stop valve 9 is arranged on the condensate external discharge pipe 16. The low-pressure steam condensate in the condensate flash tank 1 can enter the low-pressure steam main pipe 13 through the liquid level regulating valve 8, the second three-way pipe 18 and the second regulating valve 4 in sequence.

[0022] In the above, the output end of the temperature reduction and pressure reduction system is provided with a first three-way pipe 17, and is connected to the first main water inlet of the first three-way pipe, the first gas output end is connected to the second main water inlet of the first three-way pipe 17, and a first regulating valve 2 is provided between the first gas output end and the first three-way pipe 17, wherein the input end of the low-pressure steam main pipe 13 is connected to the branch water outlet of the first three-way pipe 18, and the low-pressure steam in the condensate flash tank 1 enters the low-pressure steam main pipe 13 through the first regulating valve 2 and the first three-way pipe 18 in sequence.

[0023] In the above, the cooling and pressure reduction system includes a high-pressure superheated steam pipeline 12, a desalted water pipeline 11 and a cooling and pressure reducing device 10. The two input ends of the cooling and pressure reducing device 10 are respectively connected to the output ends of the high-pressure superheated steam pipeline 12 and the desalted water pipeline 11. The output end of the cooling and pressure reducing device 10 is connected to the first main water inlet of the first three-way pipe 17 through a pipeline. After the high-pressure superheated steam and desalted water enter the cooling and pressure reducing device 10, they are converted into low-pressure steam and enter the low-pressure steam main pipe 13 through the first three-way pipe 17.

[0024] In the above, the fourth regulating valve 6 and the fifth regulating valve 7 are sequentially arranged on the low-pressure steam main pipe 13 along the water delivery direction. When the low-pressure steam condensate is used, the fourth regulating valve 4 and the stop valve 9 are closed, and the second regulating valve 4 is opened. The low-pressure steam condensate in the condensate flash tank 1 enters the low-pressure steam main pipe 13 through the liquid level regulating valve 8, the second three-way pipe 18 and the second regulating valve 4 in sequence.

[0025] In the above, a vent valve 3 and a connecting pipe are sequentially arranged on the load branch pipeline 14 along the low-pressure steam outlet direction. The connecting pipe is arranged on the side of the fifth regulating valve 7 away from the fourth regulating valve 6, so that the low-pressure steam in the low-pressure steam main 13 can supplement the low-pressure steam in the load branch pipeline 14.

[0026] The low-pressure steam output from the first gas output end of the intermediate condensate flash tank 1 can be directly transported to the low-pressure steam main pipe 13 through the first three-way pipe 17, or the first regulating valve 2 can be closed to allow the low-pressure steam to be directly transported to the load branch pipeline 14.

[0027] By adopting the technical solution, when low-pressure steam condensate is used, the fourth regulating valve and the stop valve are closed, the second regulating valve is opened, and the low-pressure steam condensate in the condensate flash tank enters the low-pressure steam main pipe through the liquid level regulating valve, the second three-way pipe and the second regulating valve in sequence; when low-pressure steam is supplemented to the load branch pipeline, the fourth regulating valve, the fifth regulating valve and the third regulating valve can be opened in sequence after the vent valve is opened, and the low-pressure steam in the low-pressure steam main pipe can supplement the low-pressure steam to the load branch pipeline.

[0028] A liquid level regulating valve, a second three-way pipe and a second regulating valve are sequentially arranged on the low-pressure steam condensate pipeline along the direction in which the low-pressure steam condensate enters the low-pressure steam main pipe. A condensate external discharge pipe is arranged at the second branch water outlet of the second three-way pipe and is fixedly connected to the condensate external discharge pipe. A stop valve is arranged on the condensate external discharge pipe. When the low-pressure steam condensate is used, the fourth regulating valve and the stop valve are closed, and the second regulating valve is opened. The low-pressure steam condensate in the condensate flash tank enters the low-pressure steam main pipe through the liquid level regulating valve, the second three-way pipe and the second regulating valve in sequence, which can make up for the insufficient amount of low-pressure steam when the heating is put into use, so that the heat of the low-pressure steam condensate can be fully utilized and the condensate can be recovered.

[0029] By utilizing the technical solution, after the transformation, a liquid level regulating valve, a second three-way pipe and a second regulating valve are sequentially arranged on the low-pressure steam condensate pipeline along the direction in which the low-pressure steam condensate enters the low-pressure steam main pipe, a condensate external discharge pipe is arranged at the second branch outlet of the second three-way pipe, and is fixedly connected to the condensate external discharge pipe, and a stop valve is arranged on the condensate external discharge pipe, and the low-pressure steam condensate in the condensate flash tank can enter the low-pressure steam main pipe through the liquid level regulating valve, the second three-way pipe and the second regulating valve in sequence, and superheated steam can be saved when heating is used in winter, a large amount of superheated steam can be saved, and costs can be saved. After the transformation, the condensate temperature is reduced, and it can be sent to dry quenching for recycling after a little cooling, which can fully improve the utilization rate of the condensate and has huge economic benefits.

[0030] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A device for improving condensate utilization efficiency, characterized in that: The invention comprises a condensate flash tank, a temperature reduction and pressure reduction system and a low-pressure steam main pipe, wherein the input end of the low-pressure steam main pipe is connected to the output end of the temperature reduction and pressure reduction system, and the low-pressure steam is transported from the temperature reduction and pressure reduction system to the low-pressure steam main pipe; the condensate flash tank is provided with a first gas output end, a second gas output end and a condensate output end, the first gas output end is connected to the low-pressure steam main pipe through a pipeline, and the low-pressure steam is supplied to the low-pressure steam main pipe; the second gas output end is connected to a load branch pipeline, a connecting pipeline is provided between the load branch pipeline and the low-pressure steam main pipe, and a third regulating valve is provided on the connecting pipeline, and the low-pressure steam in the low-pressure steam main pipe can be supplemented to the load branch pipeline through the connecting pipeline; the condensate output end is connected to the low-pressure steam main pipe through a low-pressure steam condensate pipeline, and a second regulating valve is provided at the end of the low-pressure steam condensate pipeline, and the low-pressure steam condensate in the condensate flash tank enters the low-pressure steam main pipe through the low-pressure steam condensate pipeline through the second regulating valve.

2. A device for improving condensate utilization efficiency according to claim 1, characterized in that: A liquid level regulating valve, a second three-way pipe and the second regulating valve are sequentially arranged on the low-pressure steam condensate pipeline along the direction in which the low-pressure steam condensate enters the low-pressure steam main pipe. A condensate external discharge pipe is arranged at the second branch water outlet of the second three-way pipe and is fixedly connected to the condensate external discharge pipe. A stop valve is arranged on the condensate external discharge pipe. The low-pressure steam condensate in the condensate flash tank can enter the low-pressure steam main pipe via the liquid level regulating valve, the second three-way pipe and the second regulating valve in sequence.

3. A device for improving condensate utilization efficiency according to claim 1, characterized in that: The output end of the temperature reduction and pressure reduction system is provided with a first three-way pipe, and is connected to the first main water inlet of the first three-way pipe, the first gas output end is connected to the second main water inlet of the first three-way pipe, and a first regulating valve is provided between the first gas output end and the first three-way pipe, wherein the input end of the low-pressure steam main pipe is connected to the branch water outlet of the first three-way pipe, and the low-pressure steam in the condensate flash tank enters the low-pressure steam main pipe through the first regulating valve and the first three-way pipe in sequence.

4. A device for improving condensate utilization efficiency according to claim 1, characterized in that: The temperature reduction and pressure reduction system includes a high-pressure superheated steam pipeline, a desalted water pipeline and a temperature reduction and pressure reduction device. The two input ends of the temperature reduction and pressure reduction device are respectively connected to the output ends of the high-pressure superheated steam pipeline and the desalted water pipeline. The output end of the temperature reduction and pressure reduction device is connected to the first main water inlet of the first three-way pipe through a pipeline. The high-pressure superheated steam and desalted water enter the temperature reduction and pressure reduction device and are converted into low-pressure steam, and enter the low-pressure steam main pipe through the first three-way pipe.

5. A device for improving condensate utilization efficiency according to claim 2, characterized in that: The fourth regulating valve and the fifth regulating valve are sequentially arranged on the low-pressure steam main pipe along the water delivery direction. When using low-pressure steam condensate, the fourth regulating valve and the stop valve are closed, and the second regulating valve is opened. The low-pressure steam condensate in the condensate flash tank enters the low-pressure steam main pipe through the liquid level regulating valve, the second three-way pipe and the second regulating valve in sequence.

6. A device for improving condensate utilization efficiency according to claim 5, characterized in that: The load branch pipeline is provided with a vent valve and the connecting pipe in sequence along the low-pressure steam outlet direction. The connecting pipe is arranged on the side of the fifth regulating valve away from the fourth regulating valve, so that the low-pressure steam in the low-pressure steam main pipe can supplement the low-pressure steam in the load branch pipeline.

7. A method for improving condensate utilization efficiency, comprising the device for improving condensate utilization efficiency according to claim 6, characterized in that: When low-pressure steam condensate is used, the fourth regulating valve and the stop valve are closed and the second regulating valve is opened, and the low-pressure steam condensate in the condensate flash tank enters the low-pressure steam main pipe through the liquid level regulating valve, the second three-way pipe and the second regulating valve in sequence; On the contrary, when replenishing low-pressure steam into the load branch pipeline, after opening the vent valve and closing the second regulating valve, the fourth regulating valve, the fifth regulating valve and the third regulating valve can be opened in sequence, and the low-pressure steam in the low-pressure steam main can replenish the low-pressure steam into the load branch pipeline.

8. A method for improving condensate utilization efficiency according to claim 7, characterized in that: The low-pressure steam output from the first gas output end of the condensate flash tank can be directly transported to the low-pressure steam main pipe through the first three-way pipe, or the first regulating valve can be closed to allow the low-pressure steam to be directly transported to the load branch pipeline.

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