Steam condensate water recycling device

Abstract

The utility model discloses a steam condensate water recycling device, and the device is connected with 0.7MPa steam pipeline and 0.3MPa steam condensate water pipeline, comprising a water tank, a jet pump, a deaerator and a water pump, the water tank is communicated with the jet pump through a pipeline, the jet pump is communicated with the deaerator through a steam pipeline, a drain pipeline is arranged at the bottom end of the water tank, the water pump is communicated with the deaerator through a second water inlet pipeline, a pressure gauge and a second regulating valve are arranged on the second water inlet pipeline, the jet pump is communicated with the 0.7MPa steam pipeline, a first regulating valve is arranged on the pipeline between the jet pump and the 0.7MPa steam pipeline, and the water tank is connected with the 0.3MPa steam condensate water pipeline. The utility model improves energy utilization efficiency, reduces the consumption of 0.7MPa high-pressure steam, reduces the energy and water resource input cost in industrial production, and is easy to dock with the existing industrial boiler system.

Description

Technical Field

[0001] This utility model belongs to the field of chemical equipment technology, specifically relating to a steam condensate recovery and utilization device. Background Technology

[0002] In industrial production, steam is widely used as an important heat energy carrier. After steam is used, it produces a large amount of condensate, which has a temperature close to the saturation temperature at the corresponding pressure and contains considerable heat energy. In current technology, this steam condensate is usually directly discharged into a circulating water tank, which not only results in a large loss of heat energy but also wastes water resources.

[0003] Meanwhile, the deaerator in the boiler system is a key component ensuring the safe operation of the equipment. Its core function is to remove dissolved oxygen and other harmful gases from the feedwater, preventing internal corrosion of the equipment. It also improves boiler thermal efficiency by heating the feedwater. Its working principle is based on thermal deaeration technology. Currently, the industry commonly uses 0.7MPa high-pressure fresh steam to directly heat the deaerator, causing dissolved gases in the water to be released and discharged. However, this method only utilizes the thermal energy of high-pressure steam, resulting in high high-pressure steam consumption and high operating costs.

[0004] The core flaws of the existing technology are: on the one hand, the heat energy of the 0.3MPa steam condensate is not effectively recovered, resulting in heat energy waste; on the other hand, the deaerator heating relies on a single high-pressure steam, the form of heat energy utilization is singular, and the energy loss is significant, which does not meet the energy conservation and consumption reduction requirements of industrial production. Utility Model Content

[0005] This utility model addresses the aforementioned problems and overcomes the shortcomings of existing technologies by providing a steam condensate recovery and utilization device. The device is connected to a 0.7MPa steam pipeline and a 0.3MPa steam condensate pipeline; it includes a water tank, a jet pump, a deaerator, and a water pump; the water tank and the jet pump are connected via pipelines; the jet pump is connected to the deaerator via a steam pipeline. A drain pipe is installed at the bottom of the water tank, and the drain pipe is connected to the water pump; a first inlet pipe is installed at the inlet of the water pump, and a second inlet pipe is installed at the outlet of the water pump; the water pump is connected to the deaerator through the second inlet pipe; a pressure gauge and a second regulating valve are installed on the second inlet pipe. The jet pump is connected to a 0.7MPa steam pipeline; a first regulating valve is provided on the pipeline between the jet pump and the 0.7MPa steam pipeline; the water tank is connected to a 0.3MPa steam condensate pipeline.

[0006] Preferably, the deaerator is provided with an exhaust port, the exhaust port is equipped with an exhaust valve, and the bottom of the deaerator is provided with a drain valve.

[0007] Preferably, a check valve is provided on the pipeline between the water tank and the jet pump.

[0008] Preferably, the deaerator is equipped with a level gauge and a thermometer.

[0009] Preferably, the drainage pipeline merges with the first water inlet pipeline and is then connected to the water pump.

[0010] This invention recovers 0.3MPa steam condensate to supply water to the deaerator, while simultaneously allowing the steam (0.15MPa, 120-130℃) flashed from the 0.3MPa steam condensate to be mixed with 0.7MPa high-pressure steam via a jet pump and discharged at an intermediate pressure (0.15-0.7MPa). This intermediate pressure (0.15-0.7MPa) steam is then used to heat the deaerator, providing a suitable water source for the boiler.

[0011] The beneficial effects of this utility model are: This invention recovers the heat energy of the previously wasted 0.3MPa steam condensate, improving overall energy efficiency. At the same time, it reduces the consumption of 0.7MPa high-pressure steam, saves the amount of fresh water used for deaerator makeup, and lowers the energy and water input costs in industrial production, resulting in better operational economy. Furthermore, this invention is easy to integrate with existing industrial boiler systems, with low modification difficulty and strong practicality. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a steam condensate recovery and utilization device according to the present invention.

[0013] The markings in the diagram are as follows: 1 is a water tank, 2 is a jet pump, 3 is a deaerator, 4 is a water pump, 5 is the first water inlet pipe, 6 is a steam pipe, 7 is the second water inlet pipe, 8 is a 0.7MPa steam pipe, 9 is a 0.3MPa steam condensate pipe, 10 is a water treatment device, and 11 is a boiler. Detailed Implementation

[0014] To make the technical problems solved, the technical solutions, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0015] Combination Figure 1 As shown, a steam condensate recovery and utilization device is provided. This device is connected to the 0.7MPa steam pipe 8 and the 0.3MPa steam condensate pipe 9 in the system.

[0016] This utility model includes a water tank 1, a jet pump 2, a deaerator 3, and a water pump 4; the water tank 1 and the jet pump 2 are connected by a pipeline; the jet pump 2 is connected to the deaerator 3 through a steam pipeline 6; A drain pipe is installed at the bottom of the water tank 1, and the drain pipe is connected to the water pump 4; the water pump 4 is equipped with a first inlet pipe 5 (this pipe is the inlet pipe for the water pump), and the water pump 4 is equipped with a second inlet pipe 7 (this pipe is the inlet pipe for the deaerator 3); the water pump 4 is connected to the deaerator 3 through the second inlet pipe 7; a pressure gauge and a second regulating valve are installed on the second inlet pipe 7; the pressure gauge is used to monitor the pressure of the water pump 4.

[0017] The jet pump 2 is connected to the 0.7MPa steam pipeline 8; a first regulating valve is installed on the pipeline between the jet pump 2 and the 0.7MPa steam pipeline 8; the water tank 1 is connected to the 0.3MPa steam condensate pipeline 9.

[0018] Specifically, the deaerator 3 is equipped with an exhaust port, which has an exhaust valve, and a drain valve is located at the bottom of the deaerator 3. The exhaust valve is used to discharge dissolved gases that are released during the heating process; the drain valve is used to drain the internal water during maintenance or when the water quality is abnormal.

[0019] Specifically, a check valve is installed on the pipeline between water tank 1 and jet pump 2. The check valve is used to prevent steam backflow.

[0020] Specifically, the deaerator 3 is equipped with a level gauge and a thermometer. The level gauge is electrically connected to a second regulating valve, which regulates the liquid level inside the deaerator 3 to ensure stable operation. The thermometer is electrically connected to a first regulating valve.

[0021] Specifically, the drainage pipeline merges with the first water inlet pipeline 5 and then connects to the water pump 4.

[0022] The working process of this utility model is as follows: This invention utilizes the synergistic action of components such as water tank 1, jet pump 2, deaerator 3, and water pump 4 to achieve the recovery and utilization of heat energy and water from steam condensate. The specific working process is divided into the following four stages: I. Condensate Collection and Flash Evaporation Stage: The 0.3MPa steam condensate generated in industrial production exits from the 0.3MPa steam condensate pipe 9 and is sent to the interior of the water tank 1. Because the pressure inside the water tank 1 is significantly lower than the delivery pressure of the 0.3MPa steam condensate, some of the 0.3MPa steam condensate entering the water tank 1 undergoes rapid flash evaporation under this sudden pressure drop, transforming into low-pressure steam at approximately 0.15MPa and a temperature of 120-130℃.

[0023] II. Low-pressure steam pressurization and mixing stage: The 0.15MPa low-pressure steam generated by flash evaporation enters the interior of jet pump 2 from the suction end through the connecting pipe between water tank 1 and jet pump 2. A check valve is installed on the pipe between water tank 1 and jet pump 2 to prevent the 0.15MPa low-pressure steam from flowing back.

[0024] Meanwhile, 0.7MPa high-pressure steam from the 0.7MPa steam pipeline 8 is delivered to the jet pump 2.

[0025] A first regulating valve is installed on the pipeline between the jet pump 2 and the 0.7MPa steam pipeline 8. By controlling the first regulating valve, the amount of high-pressure steam entering the jet pump 2 is adjusted, thereby controlling the temperature and flow rate of the intermediate pressure steam after mixing, and thus regulating the heating temperature of the deaerator 3.

[0026] When the 0.7MPa high-pressure steam flows through the nozzle of the jet pump 2, the flow velocity increases sharply. According to the principle of fluid mechanics, a local low-pressure zone is formed in the nozzle outlet area. Under the negative pressure of the local low-pressure zone, the jet pump 2 fully draws in the 0.15MPa low-pressure steam introduced from the water tank 1. Subsequently, the 0.15MPa low-pressure steam and the 0.7MPa high-pressure steam are fully mixed and exchange energy in the mixing chamber of the jet pump 2.

[0027] The mixed steam is finally discharged from the outlet of the jet pump 2 at an intermediate pressure of 0.15-0.7 MPa, providing a steam source with a suitable pressure for the subsequent heating deaerator 3.

[0028] III. Heating stage of deaerator 3: The 0.15-0.7MPa intermediate pressure steam discharged from the jet pump 2 is transported to the deaerator 3 through the steam pipeline 6 for heating the feedwater in the deaerator 3.

[0029] Meanwhile, the water to be deoxygenated flows out from the water treatment device 10. The water treated by the water treatment device 10 is demineralized water. The demineralized water is transported to the deaerator 3 through the first inlet pipe 5 and the second inlet pipe 7 via the water pump 4. It comes into full contact with the 0.15-0.7MPa intermediate pressure steam to complete the thermal deoxygenation process.

[0030] IV. Recovery of Residual Condensate: After the flash evaporation process is completed in the water tank 1, the remaining condensate, which still has a certain temperature but has not been converted into low-pressure steam, enters the drain pipe at the bottom of the water tank 1 and merges with the first water inlet pipe 5 to jointly replenish the deaerator 3 with water.

[0031] To maintain a stable liquid level in deaerator 3 and ensure its normal operation, the amount of water entering deaerator 3 is adjusted by controlling the opening of the second regulating valve on the outlet pipe of water pump 4, thereby achieving real-time control of the liquid level in deaerator 3.

[0032] Finally, the deoxygenated water is transported to boiler 11, completing the entire process of heat energy and water recovery and utilization.

[0033] It is understood that the above specific description of this utility model is only used to illustrate this utility model and is not limited to the technical solutions described in the embodiments of this utility model. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to this utility model to achieve the same technical effect; as long as the use needs are met, they are all within the protection scope of this utility model.

Claims

1. A steam condensate recovery and utilization device, characterized in that, The device is connected to a 0.7MPa steam pipe (8) and a 0.3MPa steam condensate pipe (9); it includes a water tank (1), a jet pump (2), a deaerator (3), and a water pump (4); the water tank (1) and the jet pump (2) are connected through a pipeline; the jet pump (2) is connected to the deaerator (3) through a steam pipeline (6); The bottom of the water tank (1) is provided with a drain pipe, which is connected to the water pump (4); the water pump (4) is provided with a first water inlet pipe (5) at its inlet and a second water inlet pipe (7) at its outlet; the water pump (4) is connected to the deaerator (3) through the second water inlet pipe (7); a pressure gauge and a second regulating valve are provided on the second water inlet pipe (7); The jet pump (2) is connected to the 0.7MPa steam pipe (8); a first regulating valve is provided on the pipe between the jet pump (2) and the 0.7MPa steam pipe (8); the water tank (1) is connected to the 0.3MPa steam condensate pipe (9).

2. The steam condensate recovery and utilization device according to claim 1, characterized in that, The deaerator (3) is provided with an exhaust port, the exhaust port is provided with an exhaust valve, and the bottom of the deaerator (3) is provided with a drain valve.

3. The steam condensate recovery and utilization device according to claim 1, characterized in that, A check valve is provided on the pipeline between the water tank (1) and the jet pump (2).

4. The steam condensate recovery and utilization device according to claim 1, characterized in that, The deaerator (3) is equipped with a level gauge and a thermometer.

5. The steam condensate recovery and utilization device according to claim 1, characterized in that, The drainage pipeline merges with the first water inlet pipeline (5) and then connects to the water pump (4).

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