Non-condensable gas removing device

Abstract

The utility model discloses a non-condensable gas removing device, and belongs to the technical field of hot-pressing distillation. Which comprises an evaporator (6) and a buffer tank (10), and is characterized in that two pipelines, namely a first discharge pipeline (5) and an injection water connecting pipeline (9), are led out from the side part of the evaporator (6), the injection water connecting pipeline (9) is connected with the buffer tank (10), and the communication part of the first discharge pipeline (5) and the evaporator (6) is positioned at the upper part of the liquid level of injection water in the evaporator (6); and the communication part of the injection water connecting pipeline (9) and the evaporator (6) is positioned at the lower part of the liquid level of the injection water in the evaporator (6). In the non-condensable gas removal device, the first exhaust pipeline directly exhausts the non-condensable gas, the injection water connecting pipeline introduces the injection water in the evaporator into the buffer tank and then exhausts the injection water through the buffer tank, and the two paths of non-condensable gas are exhausted, so that the problem that the non-condensable gas continuously gathers in the evaporator and cannot be exhausted in time can be solved; and the water quality of produced water of the water for injection is ensured.

Description

Technical Field

[0001] A non-condensable gas removal device belongs to the field of thermostatic distillation technology. Background Technology

[0002] In existing technologies, water for injection is obtained by distilling purified water. In the actual preparation process, pure water is fed into the evaporator, where it is then converted from steam through condensation. However, the preparation of water for injection generates non-condensable gases, which mainly include nitrogen, oxygen, hydrogen, carbon dioxide, hydrocarbons, inert gases, and mixtures thereof. These non-condensable gases reduce the effective heat exchange area of ​​the evaporator, thereby increasing the workload of the compressor and power consumption; therefore, it is necessary to remove these non-condensable gases promptly.

[0003] Chinese utility model patent application number 201720812399.2, filed on July 6, 2017, entitled "A Non-condensable Gas Removal Device," discloses a technical solution. In this solution, a non-condensable gas degassing tank is provided, and the non-condensable gas is discharged through spraying within the tank. This solution has the following problems: (1) A dedicated non-condensable gas degassing tank is required, making the system composition relatively complex. (2) When the non-condensable gas is output through the evaporator, its temperature is relatively high, about 100°C. In this solution, the non-condensable gas is directly discharged after being cooled by spraying, which results in some waste.

[0004] Application No. 202410018228.7, application date January 5, 2024, Chinese utility model patent entitled "Thermopressurized Pure Steam Generator" discloses a technical solution. In this technical solution, a non-condensable gas separator is set up. After gas-liquid separation in the non-condensable gas separator, the non-condensable gas enters the feed water heater to heat the feed water, realizing the secondary utilization of the temperature of the non-condensable gas. This solution has the following problems: (1) It requires a special non-condensable gas separator tank, which also has the problem of relatively complex system composition. (2) In this technical solution, as the non-condensable gas gradually enters the non-condensable gas separator, the liquid separated in the non-condensable gas separator will gradually enter the pipeline between the non-condensable gas separator and the evaporator, causing poor non-condensable gas discharge and resulting in the accumulation of non-condensable gas in the evaporator. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a non-condensable gas removal device by setting two pipelines on the side of the evaporator: a first discharge pipeline and an injection water connection pipeline. The first discharge pipeline directly discharges non-condensable gases, and the injection water connection pipeline introduces the injection water in the evaporator into a buffer tank and then discharges it through the buffer pipe. By discharging non-condensable gases through two pipelines, the problem of non-condensable gases continuously accumulating in the evaporator and not being discharged in time can be solved, thus ensuring the quality of injection water.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: The non-condensable gas removal device includes an evaporator and a buffer tank, characterized in that: two pipelines are led out from the side of the evaporator: a first discharge pipeline and an injection water connection pipeline, the injection water connection pipeline is connected to the buffer tank, the connection point between the first discharge pipeline and the evaporator is located at the upper part of the injection water level in the evaporator, and the connection point between the injection water connection pipeline and the evaporator is located at the lower part of the injection water level in the evaporator.

[0007] Preferably, a second discharge pipe is also provided at the top of the self-buffered tank, and the outlets of the first discharge pipe and the second discharge pipe are combined as non-condensable gas outlets.

[0008] Preferably, a heat exchanger is provided, with the non-condensable gas outlet connected to the high-temperature medium inlet of the heat exchanger.

[0009] Preferably, a balancing valve for balancing pipeline pressure is installed on the first discharge pipeline.

[0010] Preferably, the balancing valve includes a valve body, one end of which is connected to a first discharge pipeline, and a filter is connected to the other end of the valve body.

[0011] Preferably, the pure water inlet pipe for supplying pure water is connected to the low-temperature medium inlet of the heat exchanger.

[0012] Preferably, a first valve is installed on the first discharge pipeline.

[0013] Preferably, a second valve is installed on the injection water connection pipeline.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] In this non-condensable gas removal device, two pipelines are installed on the side of the evaporator: a first discharge pipeline and an injection water connection pipeline. The first discharge pipeline directly discharges the non-condensable gases, while the injection water connection pipeline introduces the injection water from the evaporator into a buffer tank, and then discharges it through the buffer pipe. This dual-pathway discharge of non-condensable gases solves the problem of continuous accumulation of non-condensable gases within the evaporator and their inability to be discharged in a timely manner, thus ensuring the quality of the injection water.

[0016] In this non-condensable gas removal device, a heat exchanger is installed to reuse the high temperature of the non-condensable gas, thereby achieving the preheating of pure water.

[0017] Equipped with a balancing valve, non-condensable gases can be discharged from the top after the equipment is shut down, while residual water in the evaporator is drained, ensuring the cleanliness of the system. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a non-condensable gas removal device.

[0019] The components include: 1. Pure water inlet pipe; 2. Heat exchanger; 3. Balancing valve; 4. Second outlet pipe; 5. First outlet pipe; 6. Evaporator; 7. First valve; 8. Second valve; 9. Injection water connection pipe; 10. Buffer tank. Detailed Implementation

[0020] Figure 1 This is the preferred embodiment of the present invention, which is described below in conjunction with the appendix. Figure 1 The present invention will be further described below.

[0021] like Figure 1 As shown, a non-condensable gas removal device includes an evaporator 6, with a buffer tank 10 disposed on the side of the evaporator 6. The buffer tank 10 is connected to the evaporator 6 via an injection water connection pipe 9. A second valve 8 is installed on the injection water connection pipe 9. The connection point between the injection water connection pipe 9 and the evaporator 6 is located below the injection water level inside the evaporator 6.

[0022] A first discharge pipe 5 is also provided on the side of the evaporator 6, and the connection between the first discharge pipe 5 and the evaporator 6 is located above the injection water level in the evaporator 6. A first valve 7 is installed on the first discharge pipe 5, and a second discharge pipe 4 is led out from the top of the buffer tank 10. The second discharge pipe 4 and the first discharge pipe 5 are connected to the high-temperature medium inlet of the heat exchanger 2. A pure water inlet pipe 1 is provided at the low-temperature medium inlet of the heat exchanger 2, and a pure water outlet pipe (not shown in the figure) is provided at the low-temperature medium outlet of the heat exchanger 2. The pure water outlet pipe is connected to the evaporator 6.

[0023] A balancing valve 3 for balancing the pressure in the pipeline is also provided on the connecting pipeline between the first discharge pipeline 5 and the heat exchanger 2. The balancing valve 3 includes a valve body, one end of which is connected to the first discharge pipeline 5, and a filter is provided at the other end of the valve body.

[0024] The specific working process and working principle are as follows:

[0025] Pure water is supplied through pure water inlet pipe 1. It first enters heat exchanger 2 for heat exchange, and then enters evaporator 6. After evaporation in evaporator 6, the pure water forms steam. Upon cooling, the condensate collects at the bottom of evaporator 6, forming water for injection. When the second valve 8 and the first valve 7 are opened, non-condensable gases in evaporator 6 are discharged through the first outlet pipe 5. Water for injection enters buffer tank 10 through the second valve 8, and some non-condensable gases are discharged from the second outlet pipe 4 at the top of buffer tank 10.

[0026] After being discharged through the second discharge pipe 4 and the first discharge pipe 5, the non-condensable gas enters the heat exchanger 2 and acts as a high-temperature medium to heat the pure water entering the heat exchanger 2, thus achieving the effect of preheating the pure water.

[0027] After the evaporator 6 stops, the balancing valve 3 is opened. The outside air is filtered through the filter in the balancing valve 3 and then enters the first discharge pipe 5 through the valve body in the balancing valve 3, so as to balance the pressure in the evaporator 6 with the atmosphere, so as to discharge the residual water for injection in the evaporator 6.

[0028] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A non-condensable gas removal device, comprising an evaporator (6) and a buffer tank (10), characterized in that: Two pipes are drawn from the side of the evaporator (6): a first discharge pipe (5) and an injection water connection pipe (9). The injection water connection pipe (9) is connected to the buffer tank (10). The connection point between the first discharge pipe (5) and the evaporator (6) is located at the upper part of the injection water level in the evaporator (6), and the connection point between the injection water connection pipe (9) and the evaporator (6) is located at the lower part of the injection water level in the evaporator (6).

2. The non-condensable gas removal device according to claim 1, characterized in that: The top of the self-buffered tank (10) is also provided with a second discharge pipe (4), and the outlets of the first discharge pipe (5) and the second discharge pipe (4) are combined as non-condensable gas outlets.

3. The non-condensable gas removal device according to claim 2, characterized in that: A heat exchanger (2) is provided, and the non-condensable gas outlet is connected to the high-temperature medium inlet of the heat exchanger (2).

4. The non-condensable gas removal device according to claim 2, characterized in that: A balancing valve (3) for balancing the pressure in the pipeline is installed on the first discharge pipeline (5).

5. The non-condensable gas removal device according to claim 4, characterized in that: The balancing valve (3) includes a valve body, one end of which is connected to the first discharge pipeline (5), and a filter is connected to the other end of the valve body.

6. The non-condensable gas removal device according to claim 3, characterized in that: The pure water inlet pipe (1) for supplying pure water is connected to the low-temperature medium inlet of the heat exchanger (2).

7. The non-condensable gas removal device according to claim 2, characterized in that: A first valve (7) is installed on the first discharge pipeline (5).

8. The non-condensable gas removal device according to claim 2, characterized in that: A second valve (8) is installed on the injection water connection pipeline (9).

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