Indoor seed production workshop mixed gas supply device

Abstract

This utility model relates to the field of algae cultivation, and more particularly to a mixed gas supply device for an indoor propagation workshop. The indoor propagation workshop mixed gas supply device includes an air supply unit, a carbon dioxide supply unit, a gas mixing unit, a gas filtration unit, and a gas distribution unit, all connected by pipelines. The air supply unit includes an air compressor, a first self-regulating pressure constant valve, and an air buffer storage tank. The indoor propagation workshop mixed gas supply device provided by this utility model, by installing a flow meter on the inlet pipe of the mixing device in the gas mixing unit, can precisely control the flow ratio of air to carbon dioxide to 1%-4%, ensuring stable mixed gas composition, meeting the stringent gas composition requirements of Haematococcus pluvialis and green algae during the propagation stage, improving photosynthetic efficiency, and promoting rapid cell division and expansion of Haematococcus pluvialis during the reproductive growth stage.

Description

Technical Field

[0001] This utility model relates to the field of algae cultivation, and in particular to a mixed gas supply device for an indoor expansion workshop. Background Technology

[0002] Haematococcus pluvialis, an important microalga, has attracted much attention due to its ability to produce high-value astaxanthin. During its cultivation, a suitable gas supply plays a crucial role in the growth, reproduction, and astaxanthin accumulation of algal cells. Haematococcus pluvialis requires sufficient carbon dioxide as a carbon source for photosynthesis, while adequate air supplementation regulates the gaseous environment and provides necessary nitrogen and other gases. However, existing gas supply systems have several problems. Many traditional gas supply systems struggle to precisely control the mixing ratio of air and carbon dioxide, leading to unstable gas composition. This affects the photosynthetic efficiency of Haematococcus pluvialis, consequently impacting its growth rate and biomass accumulation. For example, when the carbon dioxide concentration is too high or too low, algal cells may not be able to fully utilize light energy for effective photosynthesis, resulting in slow growth or even physiological abnormalities.

[0003] Therefore, it is necessary to provide a new mixed gas supply device for indoor seed production workshops to solve the above-mentioned technical problems. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, a mixed gas supply device for indoor seed production workshops is provided to solve the above-mentioned problems.

[0005] The indoor seed production workshop mixed gas supply device provided by this utility model includes: an air supply unit, a carbon dioxide supply unit, a gas mixing unit, a gas filtration unit, and a gas distribution unit, all connected by pipelines. The air supply unit includes an air compressor, a first self-regulating pressure constant valve, and an air buffer storage tank. The outlet of the air compressor is connected to the inlet of the first self-regulating pressure constant valve, and the outlet of the first self-regulating pressure constant valve is connected to the air buffer storage tank. The air buffer storage tank is connected to the gas mixing unit via a pipeline, and a first precision filter is installed on the pipeline. The carbon dioxide supply unit includes a carbon dioxide vaporizer, a second self-regulating pressure constant valve, and a carbon dioxide buffer storage tank. The outlet of the carbon dioxide vaporizer is connected to the inlet of the second self-regulating pressure constant valve, and the outlet of the second self-regulating pressure constant valve is connected to the carbon dioxide buffer storage tank. The carbon dioxide buffer storage tank is connected to the gas mixing unit via a pipeline, and a second precision filter is installed on the pipeline.

[0006] Preferably, the gas mixing unit is equipped with a mixing device, the pipes of the air supply unit and the carbon dioxide supply unit are respectively connected to different inlets of the mixing device, the outlet of the mixing device is connected to the gas distribution unit, and a flow meter is installed on the inlet pipe of the mixing device.

[0007] Preferably, the gas filtration unit includes a third precision filter disposed on the outlet pipe of the mixing device.

[0008] Preferably, the gas distribution unit adopts an annular transport pipeline, the inlet of which is connected to the outlet of the gas filtration unit, and multiple gas outlets are evenly distributed on the annular transport pipeline, with a valve installed at each gas outlet.

[0009] Preferably, the pipe size includes DN90 and DN50, and the outlet pipe size is DN20.

[0010] Compared with related technologies, the mixed gas supply device for indoor seed production workshops provided by this utility model has the following beneficial effects:

[0011] This invention, by installing a flow meter on the inlet pipe of the mixing device in the gas mixing unit, can precisely control the flow ratio of air to carbon dioxide to 1%-4%, ensuring the stability of the mixed gas composition, meeting the strict requirements of Haematococcus pluvialis and green algae for gas composition during the propagation stage, improving photosynthetic efficiency, and promoting the rapid division and expansion of Haematococcus pluvialis cells during the reproductive growth stage.

[0012] This invention features a self-regulating pressure constant valve and a buffer gas storage tank in the air supply unit and carbon dioxide supply unit, respectively. The gas distribution unit adopts a ring-shaped transport pipeline structure, which effectively maintains the pressure stability of the gas during production, transmission and distribution, avoids the impact of pressure fluctuations on the algal cell growth environment, and ensures the stability of the aquaculture process. Attached Figure Description

[0013] Figure 1 A schematic diagram of a preferred embodiment of the mixed gas supply device for an indoor seed production workshop provided by this utility model;

[0014] Figure 2 for Figure 1 The diagram shows the structure of the air supply unit.

[0015] Figure 3 for Figure 1 The diagram shows the structure of the carbon dioxide supply unit.

[0016] The following are the labels in the diagram: 1. Air compressor; 11. First self-regulating pressure constant valve; 12. Air buffer storage tank; 13. First precision filter; 2. Carbon dioxide vaporizer; 21. Second self-regulating pressure constant valve; 22. Carbon dioxide buffer storage tank; 23. Second precision filter; 3. Flow meter; 4. Third precision filter. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and 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.

[0018] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0019] This utility model provides an indoor seed production workshop mixed gas supply device, which includes an air supply unit, a carbon dioxide supply unit, a gas mixing unit, a gas filtration unit, and a gas distribution unit. The units are connected by pipelines. The air supply unit includes an air compressor 1, a first self-regulating pressure constant valve 11, and an air buffer storage tank 12. The outlet of the air compressor 1 is connected to the inlet of the first self-regulating pressure constant valve 11, and the outlet of the first self-regulating pressure constant valve 11 is connected to the air buffer storage tank 12. The air buffer storage tank 12 is connected to the gas mixing unit via a pipeline, and a first precision filter 13 is installed on the pipeline. The carbon dioxide supply unit includes a carbon dioxide vaporizer 2, a second self-regulating pressure constant valve 21, and a carbon dioxide buffer storage tank 22. The outlet of the carbon dioxide vaporizer 2 is connected to the inlet of the second self-regulating pressure constant valve 21, and the outlet of the second self-regulating pressure constant valve 21 is connected to the carbon dioxide buffer storage tank 22. The carbon dioxide buffer storage tank 22 is connected to the gas mixing unit via a pipeline, and a second precision filter 23 is installed on the pipeline.

[0020] It should be noted that the air supply unit and the carbon dioxide supply unit are connected to the subsequent units through pipelines and work together. In the air supply unit, the air compressor 1 is an oil-free air compressor responsible for generating compressed air and providing air source power for the system. The first self-regulating pressure constant valve 11 is connected to the outlet of the air compressor 1 and can perform constant pressure regulation of the compressed air to ensure stable output pressure. The air buffer storage tank 12 is connected to the outlet of the first self-regulating pressure constant valve 11 and further reduces pressure fluctuations through energy storage buffering. The first precision filter 13 (0.22 microns) on the pipeline filters the air entering the gas mixing unit to remove impurities such as suspended particles and microorganisms. In the carbon dioxide supply unit, the carbon dioxide vaporizer 2 converts liquid carbon dioxide into gas to meet the gas supply demand. The second self-regulating pressure constant valve 21 regulates the pressure of the vaporized carbon dioxide to maintain a stable output pressure. The carbon dioxide buffer storage tank 22 is connected to the outlet of the second self-regulating pressure constant valve 21, ensuring stable carbon dioxide pressure through energy storage and buffering. The second precision filter 23 (0.22 microns) on the pipeline filters the carbon dioxide gas entering the mixing unit to ensure gas cleanliness. Through the coordinated operation of the above components, the two units provide a stable and clean gas source for subsequent gas mixing, filtration, and distribution.

[0021] In an embodiment of this utility model, the gas mixing unit is provided with a mixing device, the pipes of the air supply unit and the carbon dioxide supply unit are respectively connected to different inlets of the mixing device, the outlet of the mixing device is connected to the gas distribution unit, and a flow meter 3 is installed on the inlet pipe of the mixing device.

[0022] It should be noted that the gas mixing unit is equipped with a mixing device. Its different inlets are connected via pipes to the air supply unit (air buffer tank 12 via a pipe connected to the first 0.22-micron precision filter) and the carbon dioxide supply unit (carbon dioxide buffer tank 22 via a pipe connected to the second 0.22-micron precision filter). Air heaters are installed on both pipes to control the gas temperature at 25 degrees Celsius, ensuring that the two gases enter the mixing device at a consistent and stable temperature. This avoids problems such as localized convection and stratification caused by temperature differences after mixing, ensuring uniform mixing. The outlet is connected via pipes to the third 0.22-micron sterilization filter of the gas filtration unit and the annular transport pipe of the gas distribution unit. Flow meters 3 (air flow meter range 3-30 m³ / h, carbon dioxide flow meter range 40-400 L / h) are installed on the connecting pipes between the mixing device and the two supply units, precisely controlling the compressed air to carbon dioxide ratio to be 1%-4%. The mixing device is designed to uniformly mix compressed air and carbon dioxide gas to form a mixed gas suitable for Haematococcus pluvialis cultivation. The flow meter 3 on the inlet pipe can precisely control the flow ratio of the two gases (such as setting the volume ratio according to cultivation needs) to ensure the stability of the mixed gas composition. At the same time, it works with valves to dynamically adjust the gas usage and avoid the impact of flow fluctuations on the cultivation environment. This design solves the problem of unstable ratio when supplying gas separately in the traditional way through the "precise metering + mixing" structure, and also reduces the complexity of pipeline facilities.

[0023] In an embodiment of this utility model, the gas filtration unit includes a third precision filter 4 disposed on the outlet pipe of the mixing device.

[0024] It should be noted that the third precision filter 4 is installed on the DN20 pipe at the outlet of the mixing device, located before the annular transport pipe into the gas distribution unit, and directly connected in series with the outlet of the mixing device. The core function of this filter is to perform secondary filtration of the mixed gas. Its 0.22-micron filtration precision effectively intercepts suspended particles, microorganisms (such as bacteria and fungal spores), and other contaminants in the gas, ensuring that the cleanliness of the mixed gas supplied to the algal solution is below 0.22 microns. This design, together with the first precision filter 13 of the air supply unit and the second precision filter 23 of the carbon dioxide supply unit, forms a "triple filtration system": compressed air and carbon dioxide are filtered by the first and second precision filters 23 respectively before mixing, and then sterilized a second time by the third precision filter 4 after mixing. This ensures gas cleanliness throughout the process, completely solving the problem of gas impurities contaminating algal cells in traditional gas supply systems, and providing a high-cleanliness gas environment for Haematococcus pluvialis cultivation.

[0025] In an embodiment of this utility model, the gas distribution unit adopts an annular transport pipe. The inlet of the annular transport pipe is connected to the outlet of the gas filtration unit. Multiple gas outlets are evenly distributed on the annular transport pipe, and a valve is provided at each gas outlet. The pipe size includes DN90 and DN50, and the gas outlet pipe size is DN20.

[0026] It should be noted that the gas distribution unit uses a ring-shaped transport pipeline. Its inlet is connected to the gas filtration unit (outlet of the third precision filter 4) via a pipe. The ring-shaped transport pipeline mainly uses DN90 and DN50 diameter pipes, with multiple DN20 gas outlets evenly distributed along the pipeline. Each outlet is equipped with a valve to precisely control the gas flow, ensuring stable pressure and uniform gas supply for the mixed gas. The ring-shaped transport pipeline forms multiple small loops. Each loop can support the supply of gas from multiple 5L cylinders. The advantage of this design is that the number of loops can be flexibly increased according to actual needs to meet the production requirements of different scales. For example, when the production scale expands, simply adding loops can easily accommodate more 5L cylinders, ensuring a stable and sufficient gas supply throughout the indoor expansion workshop, without affecting the efficiency and stability of gas distribution due to changes in production scale. This annular transport pipeline uses a closed-loop structure to create a symmetrical pressure field within the pipeline for the mixed gas, avoiding the pressure attenuation problem at the end of traditional straight pipelines. When the opening of a valve at a certain outlet changes, the pressure fluctuation can be compensated by the gas flow at the other end, ensuring stable pressure at each outlet. At the same time, the valve at each outlet can be adjusted independently, and together with the flow meter 3 at the inlet of the mixing device, it can achieve "precise control of total flow + on-demand distribution at specific points". For example, the gas flow can be adjusted according to different growth stages of algal cells. Compared with traditional tree-like pipeline networks, the annular pipeline reduces the number of tees and elbows, reduces gas transmission resistance, facilitates installation and maintenance, and saves pipeline facility costs. It effectively solves the problems of unstable end pressure and complex pipeline facilities in existing technologies. The annular transport pipeline of the gas distribution unit mainly uses two pipe diameters: DN90 and DN50. The DN90 pipe is used for the construction of the main ring network, and the DN50 pipe is used for the extension of the ring network branches. The outlet pipes with a uniform distribution on the annular transport pipeline are DN20, and each outlet is equipped with a valve to achieve precise control of gas usage.

[0027] The working principle of the indoor breeding workshop mixed gas supply device provided by this utility model is as follows: Air compressor 1 starts, compresses air, and outputs it. The compressed air passes through a first self-regulating pressure constant valve 11 for pressure regulation, reaching a set stable pressure value, and then enters an air buffer storage tank 12. In the air buffer storage tank 12, the compressed air is buffered and stored to further stabilize the pressure and reduce fluctuations. Next, the air flows out of the air buffer storage tank 12, passes through a first precision filter 13 to remove impurities and microorganisms, and then enters the mixing device of the gas mixing unit. Simultaneously, the carbon dioxide vaporizer 2 converts liquid carbon dioxide into gaseous carbon dioxide. The gaseous carbon dioxide passes through a second self-regulating pressure constant valve 21 to regulate its pressure, stabilizing it at a set value, and then enters a carbon dioxide buffer storage tank 22 for buffering and storage, ensuring a stable carbon dioxide supply pressure. Afterward, the carbon dioxide flows out of the carbon dioxide buffer storage tank 22, passes through a second precision filter 23 to remove impurities, and then enters the mixing device. In the mixing device, according to the monitoring and control of the flow meter 3, air and carbon dioxide are mixed in a set ratio. The mixed gas flows out from the mixing device outlet and enters the third precision filter 4 of the gas filtration unit for secondary filtration to ensure the cleanliness of the mixed gas. After secondary filtration, the mixed gas enters the annular transport pipeline of the gas distribution unit. In the annular transport pipeline, the mixed gas is evenly distributed through a closed-loop structure, forming a symmetrical pressure field. The valves at each outlet are independently adjusted according to the needs of the Haematococcus pluvialis cultivation pond, precisely distributing the mixed gas to each cultivation area, providing a stable, clean, and appropriately proportioned mixed gas environment for the growth of Haematococcus pluvialis.

[0028] The circuits and controls involved in this utility model are all existing technologies, and will not be described in detail here.

[0029] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A mixed gas supply device for a chamber expansion plant, characterized by comprising: include: The unit includes an air supply unit, a carbon dioxide supply unit, a gas mixing unit, a gas filtration unit, and a gas distribution unit, all of which are connected by pipes. The air supply unit includes an air compressor (1), a first self-regulating pressure constant valve (11), and an air buffer storage tank (12). The outlet of the air compressor (1) is connected to the inlet of the first self-regulating pressure constant valve (11), and the outlet of the first self-regulating pressure constant valve (11) is connected to the air buffer storage tank (12). The air buffer storage tank (12) is connected to the gas mixing unit through a pipeline, and a first precision filter (13) is installed on the pipeline. The carbon dioxide supply unit includes a carbon dioxide vaporizer (2), a second self-regulating pressure constant valve (21), and a carbon dioxide buffer storage tank (22). The outlet of the carbon dioxide vaporizer (2) is connected to the inlet of the second self-regulating pressure constant valve (21), and the outlet of the second self-regulating pressure constant valve (21) is connected to the carbon dioxide buffer storage tank (22). The carbon dioxide buffer storage tank (22) is connected to the gas mixing unit through a pipeline, and a second precision filter (23) is installed on the pipeline.

2. The indoor spreading plant mixing gas supply apparatus according to claim 1, characterized by, The gas mixing unit is equipped with a mixing device. The pipes of the air supply unit and the carbon dioxide supply unit are respectively connected to different inlets of the mixing device. The outlet of the mixing device is connected to the gas distribution unit, and a flow meter (3) is installed on the inlet pipe of the mixing device.

3. The indoor spreading plant mixing gas supply apparatus according to claim 2, characterized by, The gas filtration unit includes a third precision filter (4) installed on the outlet pipe of the mixing device.

4. The indoor spreading plant mixing gas supply apparatus according to claim 3, characterized by The gas distribution unit adopts a ring-shaped transport pipeline. The inlet of the ring-shaped transport pipeline is connected to the outlet of the gas filtration unit. Multiple gas outlets are evenly distributed on the ring-shaped transport pipeline, and a valve is installed at each gas outlet.

5. The indoor spreading plant mixing gas supply apparatus according to claim 4, characterized by The pipe sizes include DN90 and DN50, and the outlet pipe size is DN20.

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