Medium-temperature anaerobic fermentation tank

Abstract

The utility model provides a medium temperature anaerobic fermentation tank which comprises a tank body, a first flange, a second flange and a membrane type positive and negative pressure protector, the top of the tank body is a dome, the dome is provided with an opening, the first flange is arranged at the opening, the membrane type positive and negative pressure protector is arranged between the first flange and the second flange, and the membrane type positive and negative pressure protector is connected with the dome. The first flange and the second flange are fixedly connected through a bolt; the membrane type positive and negative pressure protector is an aluminum foil or a rubber membrane, and when the positive pressure or the negative pressure in the tank body exceeds a set value, the membrane type positive and negative pressure protector automatically bursts. The negative pressure can be prevented from being too large, and the positive pressure can be prevented from being too large; the membrane type positive and negative pressure protector effectively prevents the feed liquid in the tank from crusting and blocking, saves the maintenance cost, improves the biogas quality and yield, and reduces the tank opening maintenance frequency; and the damage of the anaerobic jar and the occurrence of safety accidents caused by the positive and negative pressure exceeding the limit value are effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of anaerobic fermentation tanks, in particular to a medium-temperature anaerobic fermentation tank. Background Art

[0002] The existing negative pressure protector of the CSTR reactor is a water-seal negative pressure protector installed on the top of the tank, and the existing CSTR negative pressure protector is usually made of ordinary carbon steel. At present, the negative pressure protector installed in the general CSTR reactor adopts a water-seal protector installed at the top of the tank to the lower part of the feed liquid. When the tank leaks or other accidents occur, when the feed liquid is lower than the water-seal tank pipe, it is automatically emptied. With the increase in the types and quantities of organic waste, the existing water-seal negative pressure protector is blocked when the feed liquid surface is crusted, and the water-seal vent pipe does not work; at the same time, when ordinary carbon steel is corroded, it also causes blockage and does not work, which can easily cause damage to the anaerobic reactor and safety accidents. Utility Model Content

[0003] In view of the current state of the art, the purpose of the utility model is to provide a medium-temperature anaerobic fermentation tank, which effectively avoids damage to the anaerobic tank and the occurrence of safety accidents caused by positive and negative pressure exceeding the limit value. To achieve the above purpose, the technical solution of the utility model is as follows:

[0004] A medium-temperature anaerobic fermentation tank comprises a tank body, a first flange, a second flange and a membrane type positive and negative pressure protector, wherein the top of the tank body is a dome, the dome is provided with an opening, the first flange is arranged at the opening, the membrane type positive and negative pressure protector is arranged between the first flange and the second flange, and the first flange and the second flange are fixedly connected by bolts; the membrane type positive and negative pressure protector is an aluminum foil or a rubber film, and when the positive pressure or negative pressure in the tank body exceeds a set value, the membrane type positive and negative pressure protector automatically bursts.

[0005] Furthermore, an annular groove is provided on the first flange, and a flange matching with the annular groove is provided on the second flange, so that the membrane type positive and negative pressure protector can be embedded in the annular groove.

[0006] Furthermore, the dome is provided with at least two openings, and each of the openings corresponds to one of the first flanges, one of the second flanges and one of the membrane-type positive and negative pressure protectors.

[0007] Furthermore, the height from the dome bottom of the tank body to the bottom of the tank body is 15000 mm, and the diameter is 16000 mm.

[0008] Furthermore, the medium-temperature anaerobic fermentation tank also includes a liquid level gauge for displaying the liquid level in the tank.

[0009] Furthermore, the central apertures of the first flange and the second flange are 100-150 mm.

[0010] The beneficial effects of the utility model are:

[0011] The medium-temperature anaerobic fermentation tank of the utility model is provided with a membrane type positive and negative pressure protector, which can prevent both excessive negative pressure and excessive positive pressure. The membrane type positive and negative pressure protector effectively prevents the clogging of the material liquid in the tank by crusting, saves maintenance costs, improves the quality and output of biogas, and reduces the frequency of opening the tank for maintenance. It effectively avoids the damage of the anaerobic tank and the occurrence of safety accidents caused by the positive and negative pressure exceeding the limit value. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of the medium-temperature anaerobic fermentation tank of the utility model;

[0013] in,

[0014] 1 tank body; 2 first flange; 3 liquid level. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the utility model more clear, the medium temperature anaerobic fermentation tank of the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0016] Reference Figure 1 A medium-temperature anaerobic fermentation tank according to an embodiment of the utility model comprises a tank body 1, a first flange 2, a second flange and a membrane type positive and negative pressure protector.

[0017] The top of the tank body 1 is a dome with an opening, a first flange 2 is arranged at the opening, a membrane type positive and negative pressure protector is arranged between the first flange 2 and the second flange, and the first flange 2 and the second flange are fixedly connected by bolts; the membrane type positive and negative pressure protector is an aluminum foil or a rubber film, and when the positive pressure or negative pressure in the tank body 1 exceeds the set value, the membrane type positive and negative pressure protector automatically bursts.

[0018] Preferably, the central apertures of the first flange 2 and the second flange are 100-150 mm.

[0019] As a preferred embodiment, an annular groove is provided on the first flange 2, and a flange matching the annular groove is provided on the second flange, so that the membrane type positive and negative pressure protector can be embedded in the annular groove. This can effectively improve the sealing effect of the membrane type positive and negative pressure protector. A sealing gasket can also be added to press the membrane type positive and negative pressure protector.

[0020] As a preferred implementation manner, at least two openings may be provided at the dome, and each of the openings corresponds to one of the first flanges, one of the second flanges, and one of the membrane-type positive and negative pressure protectors. Figure 1 Two openings are arranged at the middle dome, that is, two membrane-type positive and negative pressure protectors are arranged, which can further improve the safety and reliability of the medium-temperature anaerobic fermentation tank.

[0021] In this embodiment, the height from the dome bottom of the tank body to the bottom of the tank body is 15000 mm, and the diameter of the tank body is 16000 mm.

[0022] Preferably, the medium-temperature anaerobic fermentation tank further comprises a liquid level gauge for displaying the liquid level in the tank body, so that the liquid level can be observed conveniently and intuitively.

[0023] The improved positive and negative pressure protection is directly opened on the tank top, and the mounting flange is set to be an aluminum foil or rubber film that can withstand production needs. When the positive and negative pressure exceeds the set value, it will automatically burst to prevent accidents.

[0024] The medium-temperature anaerobic fermentation tanks in the above embodiments are provided with membrane-type positive and negative pressure protectors to prevent both excessive negative pressure and excessive positive pressure. The membrane-type positive and negative pressure protectors effectively prevent the liquid in the tank from being encrusted and blocked, save maintenance costs, improve biogas quality and output, and reduce the frequency of tank opening and maintenance. They effectively avoid damage to the anaerobic tank and the occurrence of safety accidents caused by positive and negative pressure exceeding the limit values.

[0025] It should be noted that, in the absence of conflict, the above embodiments and features therein may be combined with each other.

[0026] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A medium temperature anaerobic fermentation tank, characterized in that: The invention comprises a tank body (1), a first flange (2), a second flange and a membrane type positive and negative pressure protector, wherein the top of the tank body (1) is a dome, the dome is provided with an opening, the first flange (2) is arranged at the opening, the membrane type positive and negative pressure protector is arranged between the first flange (2) and the second flange, and the first flange (2) and the second flange are fixedly connected by bolts; the membrane type positive and negative pressure protector is an aluminum foil or a rubber film, and when the positive pressure or negative pressure in the tank body (1) exceeds a set value, the membrane type positive and negative pressure protector automatically bursts.

2. The medium temperature anaerobic fermentation tank according to claim 1, characterized in that: The dome is provided with at least two openings, and each of the openings corresponds to one of the first flanges, one of the second flanges and one of the membrane-type positive and negative pressure protectors.

3. The medium temperature anaerobic fermentation tank according to claim 1, characterized in that: The height from the dome bottom to the bottom of the tank body is 15000 mm, and the diameter is 16000 mm.

4. The medium temperature anaerobic fermentation tank according to claim 1, characterized in that: Also included is a level gauge for displaying the liquid level in the tank.

5. The medium temperature anaerobic fermentation tank according to any one of claims 1 to 4, characterized in that: The central apertures of the first flange (2) and the second flange are 100-150 mm.

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