CN203030234U - Gas-water mixing device and gas-water combined supply system - Google Patents

Abstract

The utility model provides a gas-water mixing device. The device comprises a first mixer with a first mixing cavity, a first mixing tube, a liquid water inlet tube, a gas carrier inlet tube, a second mixer and a third mixer. The first mixing tube is disposed in the first mixing cavity and extends from the top of the first mixer to the bottom of the first mixer; the liquid water inlet tube and the gas carrier inlet tube are communicated with the first mixing tube and arranged at the top of the first mixing tube respectively; the second mixer is communicated with the first mixing cavity and comprises at least one second mixing tube; and the third mixer is communicated with the second mixer and provided with a third mixing cavity. According to the gas-water mixing device, mixing of liquid water with gas carriers and three-time mixing of steam with the gas carriers are achieved, so that the gas-water ratio of gas-water mixed gas is stable, and steam is supplied stably. The utility model further provides a gas-water combined supply system.

Description

A gas-water mixing device and a gas-water combined supply system

technical field

The utility model relates to the technical field of providing water vapor for hydrogen production, in particular to a gas-water mixing device and a gas-water joint supply system.

Background technique

Hydrogen energy is recognized as the most potential energy carrier in the future due to its abundant sources, clean and pollution-free, high energy density, convenient use, and wide application. Hydrogen production by high-temperature electrolysis of water vapor and hydrogen production by steam catalytic reforming are currently the most attractive hydrogen production methods in the world. They all need to mix and transport water vapor and carrier gas to a designated space for hydrogen production. To control the ratio of water vapor and gas carrier within an appropriate range, it is necessary to ensure precise control of the gas-water ratio of the gas-water mixture, thereby ensuring a stable supply of water vapor.

At present, the air-water mixture is mainly obtained through the following methods:

The first approach is to use a water vapor generation scheme. In the preheating furnace, _H2 and _O2 are reacted to generate water vapor, and then the generated water vapor is directly passed into the designated space. Using this method can obtain clean water vapor, but because the reaction will be uneven, and it is difficult to control the flow of water vapor, resulting in a difficult-to-control gas-water ratio of the gas-water mixture, so that the stable supply of water vapor cannot be guaranteed.

The second method is to control the water vapor content in the gas-water mixture by controlling the dew point temperature. Nitrogen is used as the gas carrier to freely adjust the flow of water vapor and nitrogen. The water vapor is mixed with nitrogen first, and then enters the humidifier, where a gas-water mixture is generated. The water vapor controls the dew point temperature through the dew point sensor, thereby controlling the water vapor content in the air-water mixture. However, it is difficult to maintain a constant dew point temperature in actual use. Generally, the dew point temperature fluctuation difference is as high as 10°C, and the corresponding absolute humidity fluctuation difference representing the water vapor content is greater than 10%, and the higher the dew point temperature, the greater the absolute humidity fluctuation range. The larger the value is, the more difficult it is to control the content of water vapor, so that the stable supply of water vapor cannot be guaranteed.

To sum up, how to make the gas-water in the gas-water mixture relatively stable, so as to realize a relatively stable supply of water vapor, is an urgent problem to be solved by those skilled in the art.

Utility model content

The purpose of the utility model is to provide an air-water mixing device, so that the air-water in the air-water mixture is relatively stable, thereby realizing a relatively stable supply of water vapor. Another object of the utility model is to provide an air-water combined supply system with the above-mentioned air-water mixing device.

In order to achieve the above object, the utility model provides the following technical solutions:

A gas-water mixing device, comprising:

a first mixer having a first mixing chamber;

a first mixing tube located inside the first mixer, the first mixing tube extending from the top end of the first mixer to the bottom end of the first mixer;

A liquid water inlet pipe and a gas carrier inlet pipe respectively connected to the first mixing pipe, the liquid water inlet pipe and the gas carrier inlet pipe respectively located at the top of the first mixer;

a second mixer in communication with the first mixing chamber, the second mixer comprising at least one second mixing tube;

A third mixer communicated with the second mixer, the third mixer has a third mixing chamber.

Preferably, in the above air-water mixing device, the first mixing chamber is tapered from its bottom end to its top end.

Preferably, in the above air-water mixing device, the outlet of the first mixing tube is spaced from the bottom end of the first mixer; the top end of the first mixer faces the top end of the first mixer protruding.

Preferably, in the above air-water mixing device, the top surface of the bottom end of the first mixer is spherical.

Preferably, in the above air-water mixing device, the highest point of the top surface of the bottom end of the first mixer is opposite to the outlet of the first mixing tube.

Preferably, in the above gas-water mixing device, the outlet of the liquid water inlet pipe is flush with the outlet of the gas carrier inlet pipe.

Preferably, in the above air-water mixing device, the number of the second mixing tubes is 8, and the second mixing tubes are evenly distributed.

Preferably, the above-mentioned gas-water mixing device further includes a thermocouple for measuring the temperature of the gas-water mixture in the first mixing chamber; the first mixer is provided with an installation pipe for the thermocouple.

The working process of the gas-water mixing device provided by the utility model is: liquid water enters the first mixing pipe through the liquid water inlet pipe, and at the same time, the gas carrier enters the first mixing pipe through the gas carrier inlet pipe, so that the liquid water and the gas carrier Mixing, the liquid water and the gas carrier flow to the first mixing chamber along the first mixing tube, and the liquid water is vaporized in the first mixing chamber; the gas-water mixture formed by the water vapor and the gas carrier flows to the top of the first mixer, and Flow into the second mixer, so that the gas-water mixture is further uniformly heated in the second mixing tube, and the liquid water carried by the gas-water mixture is fully vaporized; then the gas-water mixture flows into the third mixing chamber of the third mixer, so that The air-water mixture is further uniformly mixed in the third mixing chamber to vaporize the remaining liquid water, making the air-water mixture more stable, and finally ensuring that the water vapor and the gas carrier are mixed evenly, and the air-water ratio of the obtained air-water mixture is Stablize.

The gas-water mixing device provided by the utility model realizes the mixing of liquid water and gas carrier and the three times mixing of water vapor and gas carrier through the first mixer, the second mixer and the third mixer, so that the gas-water mixed gas The gas and water in the system are relatively stable, thus achieving a relatively stable supply of water vapor.

Based on the gas-water mixing device provided above, the utility model also provides a gas-water joint supply device, which includes: a heating furnace and a gas-water mixing device located in the heating furnace, wherein the gas-water mixing The device is the gas-water mixing device described in any one of the above.

Preferably, the above gas-water combined supply device further includes: a delivery pump for delivering liquid water and controlling the flow of liquid water, and the delivery pump is connected with the liquid water inlet pipe.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the structural representation of the air-water mixing device that the utility model embodiment provides;

Fig. 2 is a graph showing the relationship between the temperature and time of the gas-water mixture after the gas-water mixing device provided by the embodiment of the utility model is fed with liquid water and gas carrier;

Fig. 3 is a schematic diagram of the distribution of the second mixing tube in the second mixer in the gas-water mixing device provided by the embodiment of the present invention;

Fig. 4 is a schematic flow diagram of the gas-water co-supply system provided by the embodiment of the present invention.

In Figure 1-4 above:

First mixer 1 , first mixing tube 2 , installation tube 3 , gas carrier inlet tube 4 , liquid water inlet tube 5 , second mixer 6 , second mixing tube 61 , third mixer 7 .

Detailed ways

The embodiment of the utility model provides an air-water mixing device, so that the air-water in the air-water mixture is relatively stable, thereby realizing a relatively stable supply of water vapor.

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to the accompanying drawings 1-3, Fig. 1 is a schematic structural diagram of the gas-water mixing device provided by the embodiment of the utility model; Fig. 2 is the gas-water mixing device provided by the embodiment of the utility model after feeding liquid water and a gas carrier, the gas The relationship between the water mixture temperature and time; Figure 3 is a schematic diagram of the distribution of the second mixing tube in the second mixer in the air-water mixing device provided by the embodiment of the present invention.

The gas-water mixing device provided by the embodiment of the utility model includes: a first mixer 1 with a first mixing chamber; a first mixing tube 2 inside the first mixer 1, and the first mixing tube 2 connects The top of 1 extends to the bottom of the first mixer 1; the liquid water inlet pipe 5 and the gas carrier inlet pipe 4 respectively connected with the first mixing pipe 2, the liquid water inlet pipe 5 and the gas carrier inlet pipe 4 are respectively located in the first mixer The top of a mixer 1; the second mixer 6 communicated with the first mixing chamber, the second mixer 6 includes at least one second mixing tube 61; the third mixer 7 communicated with the second mixer 6, The third mixer 7 has a third mixing chamber. Wherein, the third mixer 7 is provided with an air outlet pipe to transport out the uniformly mixed air-water mixer.

The working process of the gas-water mixing device provided by the embodiment of the utility model is: liquid water enters the first mixing pipe 2 through the liquid water inlet pipe 5, and at the same time, the gas carrier enters the first mixing pipe 2 through the gas carrier inlet pipe 4, The liquid water and the gas carrier are mixed, and the liquid water and the gas carrier flow to the first mixing chamber along the first mixing tube 2, and the liquid water is vaporized in the first mixing chamber; the gas-water mixture formed by the water vapor and the gas carrier flows to the first The top of the mixer 1 flows and flows into the second mixer 6, so that the gas-water mixture is further uniformly heated in the second mixing tube 61, and the liquid water carried by the gas-water mixture is fully vaporized; then the gas-water mixture flows to The third mixing chamber of the third mixer 7 enables the gas-water mixture to be further uniformly mixed in the third mixing chamber, vaporizes the remaining liquid water, makes the gas-water mixture more stable, and finally ensures the mixing of water vapor and the gas carrier Uniform, the air-water of the obtained air-water mixture is relatively stable.

The gas-water mixing device provided by the embodiment of the utility model, through the first mixer 1, the second mixer 6 and the third mixer 7, realizes the mixing of liquid water and gas carrier and the three times mixing of water vapor and gas carrier, The gas-water of the gas-water mixture is relatively stable, thereby realizing a relatively stable supply of water vapor.

At the same time, the gas-water mixing device provided by the embodiment of the utility model has high control accuracy of the gas-water ratio of the gas-water mixture, and can accurately provide the gas-water ratio of the gas-water mixture; the gas-water mixing device can be used for experiments Small-scale laboratory experiments can also be applied to large-scale production, with a wide range of applications; the gas-water mixing device has a relatively simple structure and low cost; the gas-water mixing device has high continuous working stability and long continuous service life .

During the experiment, when 4ml/min of liquid water and 1.25L/min of gas carrier were passed into the gas-water mixing device (the gas-water mixing device was placed in a heating furnace, and the temperature of the heating furnace was 500°C), The temperature T ₁ in the first mixing chamber of the first mixer 1, the temperature T ₂ in the third mixing chamber of the third mixer 7, T ₁ and T ₂ reach stability after 24min and 70min respectively, as shown in Figure 2 Show; when the liquid water of 10ml/min and the gas carrier of 2L/min are passed into the air-water mixing device, the temperature T ₁ ' in the first mixing chamber of the first mixer 1, the third of the third mixer 7 The temperature T ₂ ′, T ₁ ′ and T ₂ ′ in the mixing chamber reached stability after 120 min and 160 min respectively, as shown in Fig. 2 .

The above experiments show that the air-water mixing device can make the air-water in the air-water mixture relatively stable, thereby realizing a long-term stable supply of water vapor. In the above experiments, the liquid water is specifically deionized water, and the gas carrier is specifically hydrogen gas. Of course, the liquid water can also be other water, and the gas carrier can also be other inert gases.

The air-water mixing device provided in the above embodiments may also include other mixers, or increase the number of first mixers 1 , or increase the number of second mixers 6 , or increase the number of third mixers 7 .

Preferably, in the air-water mixing device provided in the above embodiment, the first mixing chamber is tapered from its bottom end to its top end. In this way, the vaporization of liquid water is facilitated, and the gas-water mixture flows into the second mixer 6 .

In order to facilitate the vaporization of liquid water, in the gas-water mixing device provided by the above-mentioned embodiments, the outlet of the first mixing tube 2 is spaced from the bottom end of the first mixer 1; the top of the bottom end of the first mixer 1 faces the first mixer 1 protrudes from the top. The bottom top surface refers to the surface where the bottom of the first mixer 1 faces the top of the first mixer 1 , that is, the bottom top surface refers to the surface that can be in contact with liquid water and gas carrier. When the liquid water flows out from the first mixing tube 2, the liquid water will fall on the top surface of the bottom end of the first mixer 1 and collide, and splash around, which strengthens the vaporization of the liquid water. The top surface of the bottom end of the first mixer 1 can be conical or spherical. In order to facilitate manufacture and vaporization of liquid water, it is preferred that the top surface of the bottom end of the first mixer 1 is spherical. Certainly, the top surface of the bottom end of the first mixer 1 may also be in other shapes, which is not specifically limited in this embodiment of the present utility model.

In order to further optimize the above-mentioned technical solution, in the air-water mixing device provided in the above-mentioned embodiment, the highest point of the bottom top surface of the first mixer 1 is opposite to the outlet of the first mixing tube 2, so as to ensure that the water droplets can fall to the top surface of the bottom end. The highest point can make the liquid water splash evenly around, thereby further strengthening the vaporization of the liquid water and providing sufficient water vapor.

Preferably, in the gas-water mixing device provided in the above-mentioned embodiment, the number of the second mixing tubes 61 is 8, and the second mixing tubes 61 are evenly distributed, as shown in FIG. 3 , the second mixing tubes 61 can be evenly heated, This ensures that the air-water mixture in the second mixing tube 61 is fully mixed and vaporized evenly under heat. Of course, the number of the second mixing tubes 61 can also be other values, and can also be distributed in other ways, and the embodiment of the present utility model does not specifically limit the number and distribution of the second mixing tubes 61 .

In order to ensure that the liquid water can be fully mixed with the gas carrier, in the gas-water mixing device provided in the above-mentioned embodiment, the outlet of the liquid water inlet pipe 5 is flush with the outlet of the gas carrier inlet pipe 4, which can ensure that the water flowing in from the liquid water inlet pipe 5 The liquid water can be immediately mixed with the gas carrier flowing in from the gas carrier inlet pipe 4, which provides a prerequisite for obtaining a relatively stable gas-water ratio.

Preferably, the gas-water mixing device provided in the above embodiment further includes a thermocouple for measuring the temperature of the gas-water mixture in the first mixing chamber; the first mixer 1 is provided with a thermocouple installation pipe 3 . The temperature of the thermocouple can be observed. When the temperature maintains a constant value, it shows that the gas-water mixture in the first mixing chamber is relatively stable. The thermocouple can ensure that the air-water in the air-water mixture in the first mixing chamber is relatively stable. In order to further optimize the above technical solution, in the air-water mixing device provided in the above embodiment, a thermocouple for measuring the temperature of the air-water mixture in the third mixing chamber may also be provided on the third mixer 7 . The thermocouple can ensure that when the gas-water mixture flows out, the gas-water of the gas-water mixture is relatively stable.

Based on the gas-water mixing device provided in the above embodiments, the embodiment of the utility model also provides a gas-water combined supply system, which includes: a heating furnace and a gas-water mixing device located in the heating furnace, wherein, The gas-water mixing device is the gas-water mixing device described in the foregoing embodiments.

Since the air-water combined supply system provided by the above-mentioned embodiment includes an air-water mixing device, and the air-water mixing device provided by the above-mentioned embodiment has the above-mentioned technical effects, the gas-water combined supply system provided by the embodiment of the utility model also has corresponding technical effects .

Preferably, the gas-water combined supply system provided in the above embodiment further includes: a delivery pump for delivering liquid water and controlling the flow rate of the liquid water, and the delivery pump is connected with the liquid water inlet pipe 5 . In order to measure the flow of liquid water, preferably, the delivery pump is a peristaltic pump. Certainly, the delivery pump may also be other types of pumps, which are not specifically limited in this embodiment of the present utility model.

As shown in Figure 4, in the gas-water combined supply system provided by the above embodiment, the liquid water is generally placed in the water storage tank, and the delivery pump delivers the liquid water to the liquid water inlet pipe 5, and the delivery pump also measures the amount of liquid water Flow rate; the gas source is connected to the gas carrier inlet pipe 4 through a pressure reducing valve and a mass flow meter, and the flow of the gas carrier is measured by the mass flow meter; the gas-water mixing device is arranged in the heating furnace, and the first mixer 1, The second mixer 6 and the third mixer 7 are heated to realize vaporization of liquid water. In the above gas-water combined supply system, other components can also be used to measure the flow rate of the gas carrier, which is not specifically limited in the embodiment of the present utility model.

The above description of the disclosed embodiments enables those skilled in the art to realize or use the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A gas-water mixing device, characterized in that, comprising: a first mixer having a first mixing chamber; a first mixing tube located inside the first mixer, the first mixing tube extending from the top end of the first mixer to the bottom end of the first mixer; A liquid water inlet pipe and a gas carrier inlet pipe respectively connected to the first mixing pipe, the liquid water inlet pipe and the gas carrier inlet pipe respectively located at the top of the first mixer; a second mixer in communication with the first mixing chamber, the second mixer comprising at least one second mixing tube; A third mixer communicated with the second mixer, the third mixer has a third mixing chamber. 2. The air-water mixing device according to claim 1, wherein the first mixing chamber is tapered from its bottom end to its top end. 3. The air-water mixing device according to claim 1, wherein the outlet of the first mixing tube has an interval with the bottom of the first mixer; the top of the bottom of the first mixer faces The top end of the first mixer protrudes. 4. The air-water mixing device according to claim 3, wherein the top surface of the bottom end of the first mixer is spherical. 5. The air-water mixing device according to claim 3, wherein the highest point of the top surface of the bottom end of the first mixer is opposite to the outlet of the first mixing tube. 6. The gas-water mixing device according to claim 1, wherein the outlet of the liquid water inlet pipe is flush with the outlet of the gas carrier inlet pipe. 7. The air-water mixing device according to claim 1, wherein the number of the second mixing tubes is 8, and the second mixing tubes are evenly distributed. 8. The air-water mixing device according to any one of claims 1-7, further comprising a thermocouple measuring the temperature of the air-water mixture in the first mixing chamber; the first mixer A mounting tube is provided with the thermocouple. 9. A combined gas-water supply system, comprising: a heating furnace and a gas-water mixing device located in the heating furnace, characterized in that, the gas-water mixing device is as described in any one of claims 1-8 air-water mixing device. 10. The gas-water combined supply system according to claim 9, further comprising: a delivery pump for delivering liquid water and controlling the flow rate of the liquid water, the delivery pump being in communication with the liquid water inlet pipe.

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