CN202688329U - Methane experimental device capable of controlling air exhaust by manual and automatic modes - Google Patents

Abstract

The utility model discloses a methane experimental device capable of controlling air exhaust by manual and automatic modes. The methane experimental device comprises a fermentation tank (1); an air exhaust pipe (3) is connected with the top of the fermentation tank; an electromagnetic valve (7) and a flowmeter (8) are sequentially arranged on the air exhaust pipe and are from the connection end to the exhaust end of the fermentation tank; the methane experimental device further comprises a digital pressure controller (4) and a hand-operated switch (5); the digital pressure controller is used for detecting the pressure in the fermentation tank and controlling the electromagnetic valve to be connected/disconnected according to the pressure; when the pressure reaches the preset value, the electromagnetic valve is controlled to be connected, and while the pressure is lower than the preset value, the electromagnetic valve is controlled to be disconnected; and the hand-operated switch is used for controlling the electromagnetic valve to be connected/disconnected. Different pressure control intervals are set according to the experimental requirement, the automatic air exhaust control and measurement in the pressure control intervals are realized, the electromagnetic valve is opened/closed through the hand-operated switch at any moment, and the methane experimental device is convenient for experimenters to sample and analyze gas in the fermentation tank.

Description

Biogas experimental device with manual and automatic dual-mode control of exhaust

technical field

The utility model relates to a biogas experiment device, in particular to an experiment device which is suitable for a laboratory to prepare biogas by dry fermentation using agricultural waste and livestock manure as raw materials, and has the functions of automatic pressure control and manual exhaust control.

Background technique

Before the application of biogas engineering, a lot of experimental research work is required for the biogas production technology of different materials. The effect evaluation indexes of biogas fermentation experiments are mainly gas production rate and gas production volume. Therefore, laboratory biogas fermentation tanks are generally equipped with pointer pressure gauges and flow meters. Existing laboratory biogas fermentation tanks need to be manually vented according to the pressure. During the period of large gas production, it takes a long time to be on duty manually, and the frequency of deflation is high, which consumes a lot of time. If the pressure is too high due to failure to exhaust in time, it will also cause poor sealing performance and damage to the test device. At the same time, the flow measurement will be inaccurate due to different exhaust pressure. The Agricultural Machinery Research Institute of the Chinese Academy of Tropical Agricultural Sciences has developed a biogas experimental device with automatic pressure control function (patent number: ZL200920055324.X). Although the device can automatically exhaust when the pressure exceeds the set value, it cannot be set to maintain The pressure is the minimum control interval, so it cannot fully meet the requirements of the experimental device for fermentation experiments under different biogas pressure conditions. At the same time, when the set value is not reached, manual exhaust cannot be performed, and it is not convenient to extract biogas samples for analysis at any time during the experiment.

The purpose of the above discussion is to introduce the reader to various aspects of technology that may be related to various aspects of the utility model that will be described and/or claimed below. It is believed that the discussion will help provide background information for the reader, so as to facilitate more In order to appreciate the various aspects of the present invention, it is therefore to be understood that these discussions are to be read in this light, and not as admissions of prior art.

Utility model content

The purpose of this utility model is to avoid the deficiencies in the prior art and provide a biogas experimental device with manual and automatic dual-mode control of exhaust. On the basis of the above experimental device, an adjustable pressure automatic control interval and manual exhaust are added. Control function to realize that the fermenter can adapt to the experimental requirements under different biogas pressure conditions, and can extract biogas for analysis at any time, providing convenience for biogas technology research.

The purpose of this utility model is achieved through the following technical solutions:

Provided is a biogas experimental device capable of manual and automatic dual-mode exhaust control, including a fermenter, the top of the fermenter is connected with an exhaust pipe, and the exhaust pipe is sequentially arranged from the connection end with the fermenter to the exhaust end. There are solenoid valves, flow meters, and digital pressure controllers and manual switches. The digital pressure controllers are used to detect the pressure in the fermenter and control the connection and disconnection of the solenoid valves according to the pressure. When the pressure reaches a predetermined size, the solenoid valves are controlled. The valve is connected, and when the pressure is less than a predetermined value, the solenoid valve is controlled to be disconnected; the manual switch is used to control the connection and disconnection of the solenoid valve.

Wherein, the digital pressure controller is composed of a digital pressure gauge and a controller, and the controller is connected with the solenoid valve through a control line.

Wherein, the manual switch is connected with the solenoid valve through a control line.

Wherein, the digital pressure gauge of the digital pressure controller is arranged on a section of exhaust pipe between the solenoid valve and the fermenter.

Wherein, the exhaust pipe is provided with an exhaust valve.

Beneficial effects of the utility model: due to the adoption of the above-mentioned structure, the utility model can set different pressure control intervals according to the experimental requirements, realize automatic exhaust control and metering in the pressure control interval, and can control the solenoid valve opening by manual switch at any time It is convenient for experimenters to sample and analyze the gas in the fermenter. The utility model can not only control the automatic exhaust of the biogas in the fermentation tank within the set pressure range, improve the accuracy of flow measurement and save time; it can also manually exhaust the gas, which is convenient for the test personnel to sample and monitor the biogas at any time. analysis, while improving test efficiency and safety.

Description of drawings

Utilize accompanying drawing to further illustrate the utility model, but the embodiment in the accompanying drawing does not constitute any restriction to the utility model, for those of ordinary skill in the art, under the premise of not paying creative work, also can obtain according to following accompanying drawing Additional drawings.

Figure 1 is a schematic diagram of the structure of the biogas experimental device with manual and automatic dual-mode exhaust control.

In Figure 1, there are: 1—fermentation tank, 2—exhaust valve, 3—exhaust pipe, 4—digital pressure controller, 5—manual switch, 6—control circuit, 7— Solenoid valve, 8——flow meter.

Detailed ways

In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the The embodiments and the features in the embodiments can be combined with each other.

The core of the utility model is to provide a biogas experimental device with manual and automatic dual-mode exhaust control. On the basis of the existing experimental device, an adjustable pressure automatic control interval and manual exhaust control function are added to realize fermentation. The tank can adapt to the experimental requirements under different biogas pressure conditions, and can extract biogas gas for analysis at any time, providing convenience for biogas technology research.

As shown in Fig. 1, the biogas experimental device described in the utility model that can control the exhaust in manual and automatic dual modes includes a fermenter 1, the top of the fermenter 1 is connected with an exhaust pipe 3, and the exhaust pipe 3 can be welded or Fasteners are fixed on the fermenter 1 . The exhaust pipe 3 is sequentially provided with a solenoid valve 7 and a flow meter 8 from the connection end with the fermenter 1 to the exhaust end, the solenoid valve 7 is used to control the on-off of the exhaust pipe 3, and the flow meter 8 is used to calculate The amount of gas discharged from the exhaust pipe. The utility model also includes a digital pressure controller 4 and a manual switch 5. The digital pressure controller 4 is used to detect the pressure in the fermenter 1 and control the connection and disconnection of the electromagnetic valve 7 according to the pressure. When the pressure reaches a predetermined size, The control solenoid valve 7 is connected, and when the pressure is less than a predetermined value, the control solenoid valve 7 is disconnected; therefore, the digital pressure controller 4 can set a pressure range, and when it is in the pressure range, the exhaust pipe exhausts. The manual switch 5 is used to control the connection and disconnection of the electromagnetic valve 7, and the opening and closing of the electromagnetic valve can be controlled at any time through the manual switch 5, which is convenient for experimenters to sample and analyze the gas in the fermenter.

Preferably, the digital pressure controller 4 is composed of a digital pressure gauge and a controller, the controller is connected to the solenoid valve 7 through the control circuit 6 , and the manual switch 5 is connected to the solenoid valve 7 through the control circuit 6 . The controller and the manual switch 5 control the connection and disconnection of the solenoid valve 7 through the control circuit 6 .

Preferably, the digital pressure gauge of the digital pressure controller 4 is installed on a section of exhaust pipe 3 between the solenoid valve 7 and the fermenter 1, and the digital pressure gauge is installed outside the fermenter 1 and can also detect the inside of the fermenter 1. The pressure, and the installation and maintenance are also more convenient.

Preferably, the exhaust pipe 3 is provided with an exhaust valve 2, and the exhaust valve 2 can be installed on a section of the exhaust pipe 3 between the digital pressure gauge and the fermenter 1, and the exhaust valve 2 can be a manual ball valve.

The utility model can not only control the automatic exhaust of the biogas in the fermentation tank within the set pressure range, improve the accuracy of flow measurement and save time; it can also manually exhaust the gas, which is convenient for the test personnel to sample and monitor the biogas at any time. analysis, while improving test efficiency and safety.

In this utility model, unless otherwise clearly specified and limited, terms such as "installation", "connection" and "fixation" should be understood in a broad sense, for example, they can be fixedly connected, detachably connected, or integrally Connection can be direct connection or indirect connection through an intermediary, and can also refer to the internal communication of two elements. Those of ordinary skill in the art can understand the specific meanings of the above terms in this utility model according to specific situations .

A lot of specific details have been set forth in the above description in order to fully understand the utility model. However, the utility model can also be implemented in other ways different from those described here. Therefore, it should not be understood as limiting the protection scope of the utility model.

In a word, although the utility model has exemplified the above-mentioned preferred embodiments, it should be noted that although those skilled in the art can make various changes and modifications, unless such changes and modifications deviate from the scope of the utility model, otherwise all It should be included in the protection scope of the present utility model.

Claims (5)

1. but the biogas experiment device of the double mode control exhaust of hand control and automation, comprise fermentor tank (1), the top of fermentor tank (1) is connected to vapor pipe (3), described vapor pipe (3) is upper to be provided with magnetic valve (7) successively from coupling end to the exhaust side with fermentor tank (1), under meter (8), it is characterized in that: also comprise digital pressure controller (4) and manual switch (5), described digital pressure controller (4) is communicated with and disconnection for detection of the pressure in the fermentor tank (1) and according to electromagnetic pressure control valve (7), when pressure reaches pre-sizing, control magnetic valve (7) is communicated with, when pressure during less than pre-sizing, control magnetic valve (7) disconnects; Described manual switch (5) is used for control magnetic valve (7) and is communicated with and disconnection.

2. but the biogas experiment device of the double mode control exhaust of hand control and automation according to claim 1, it is characterized in that: described digital pressure controller (4) is comprised of digital pressure gauge and controller, and controller is connected with magnetic valve (7) by control circuit (6).

3. but the biogas experiment device of the double mode control exhaust of hand control and automation according to claim 1 is characterized in that: described manual switch (5) is connected with magnetic valve (7) by control circuit (6).

4. but the biogas experiment device of the double mode control exhaust of hand control and automation according to claim 2 is characterized in that: the digital pressure gauge of described digital pressure controller (4) is arranged on one section vapor pipe (3) between magnetic valve (7) and the fermentor tank (1).

5. but it is characterized in that: described vapor pipe (3) is provided with vent valve (2) according to claim 1 and 2 or the biogas experiment device of the double mode control exhaust of 3 or 4 described hand control and automations.

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