Fermentation system for grey paperboard production

Abstract

The utility model discloses a fermentation system for producing grey paperboards. The fermentation system comprises a fermentation tank, a gas storage tank, an oxygen tank and a catalyst, an exhaust port of the fermentation tank is connected to a gas storage tank through a gas conveying pipe A. An electric control valve A, a compression pump and a check valve A are sequentially installed on the gas conveying pipe. An outlet of the gas storage tank is connected to an inlet of a catalyst through a gas conveying pipe B. A check valve B and an electric control valve B are sequentially installed on the gas conveying pipe B. An air outlet of the oxygen tank is connected to the outlet side of the electric control valve B on the air delivery pipe B through an air delivery pipe C, and an electric control valve C is mounted on the air delivery pipe C. When raw materials in the fermentation tank produce gas in the fermentation process, the gas is compressed into the gas storage tank to be stored when being accumulated to a certain amount, and when the fermentation gas in the gas storage tank is accumulated to a certain amount, the electric control valve B and the electric control valve C are opened, so that the fermentation gas is mixed with oxygen and then enters the catalyst, and the oxygen in the fermentation tank enters the catalytic converter. Therefore, generated peculiar smell molecules are oxidized and decomposed.

Description

Technical Field

[0001] The utility model relates to the technical field of grey paperboard production equipment, in particular to a fermentation system used for grey paperboard production. Background Art

[0002] Gray board paper mills generally need to store enough raw materials for 4 to 6 months, so that the raw materials can be fermented during storage to facilitate subsequent pulping and ensure continuous production of the paper mill. However, since the raw materials of gray board are basically recycled waste paper, they are generally placed directly in the fermentation tank for fermentation. During the fermentation process, a lot of fermentation gas will be produced. These gases have a very strong odor. Since the fermentation tank cannot be sealed, these gases will overflow. If it is completely sealed, the fermentation gas will cause a very high internal pressure, which will also pose a safety hazard. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a fermentation system for producing grey paperboard.

[0004] In order to solve the above technical problems, the technical solution of the utility model is:

[0005] A fermentation system for gray paperboard production, comprising a fermentation tank, a gas storage tank, an oxygen tank and a catalyst; the exhaust port of the fermentation tank is connected to the gas storage tank through an air pipe A, on which an electric control valve A, a compression pump and a check valve A are installed in sequence; the outlet of the gas storage tank is connected to an inlet of the catalyst through an air pipe B, on which a check valve B and an electric control valve B are installed in sequence; the gas outlet of the oxygen tank is connected to the outlet side of the electric control valve B on the air pipe B through an air pipe C, on which an electric control valve C is installed.

[0006] Furthermore, a mixing tube is installed on the gas delivery pipe B at the inlet side of the catalyst.

[0007] Furthermore, the catalyst consists of a shell, an ultraviolet lamp and a catalytic filler; an air inlet hood and an exhaust hood are respectively arranged at the two ends of the shell, a filler section is in the middle, and the two ends of the filler section are isolated by a sieve plate; the ultraviolet lamp is coaxially installed in the center of the filler section, and the two ends are fixed to the sieve plate, and the catalytic filler is filled in the remaining space of the catalytic section; the catalytic filler adopts a silica gel particle carrier carrying rutile nano-TiO2.

[0008] Furthermore, a pressure sensor A is installed on the top of the fermentation tank, and a pressure sensor B is installed on the gas storage tank. The pressure sensor A and the pressure sensor B are both connected to the PLC controller for feedback control of the electric control valve A, the electric control valve B, the electric control valve C, the compression pump and the catalyst.

[0009] Furthermore, a safety pressure relief valve is installed on the top side of the fermentation tank.

[0010] The advantages of the utility model are:

[0011] In the utility model, when gas is generated during the fermentation process of raw materials inside the fermentation tank, the gas is compressed and stored in the gas storage tank when it accumulates to a certain amount. When the fermentation gas in the gas storage tank accumulates to a certain amount, the electric control valve B and the electric control valve C are opened, so that the fermentation gas is mixed with oxygen and enters the catalyst, thereby oxidizing and decomposing the generated odor molecules. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 Schematic diagram of the catalyst structure.

[0014] In the figure, 1-fermentation tank, 11-safety pressure relief valve, 12-pressure sensor A, 2-gas pipe A, 21-electrically controlled valve A, 22-compression pump, 23-check valve A, 3-gas storage tank, 4-gas pipe B, 41-check valve B, 42-electrically controlled valve B, 5-oxygen tank, 6-gas pipe C, 61-electrically controlled valve C, 7-mixing tube, 8-catalyst, 81-intake hood, 82-packing section, 83-exhaust hood, 84-sieve plate, 85-ultraviolet lamp, 86-catalytic packing. DETAILED DESCRIPTION

[0015] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0016] As shown in the figure:

[0017] A fermentation system for gray board production, comprising a fermentation tank 1, a gas storage tank 3, an oxygen tank 5 and a catalyst 8; the exhaust port of the fermentation tank 1 is connected to the gas storage tank 3 through an air pipe A2, on which an electric control valve A21, a compression pump 22 and a check valve A23 are sequentially installed; the outlet of the gas storage tank 3 is connected to the inlet of the catalyst 8 through an air pipe B4, on which a check valve B41 and an electric control valve B42 are sequentially installed; the gas outlet of the oxygen tank 5 is connected to the outlet side of the electric control valve B42 on the air pipe B4 through an air pipe C6, on which an electric control valve C61 is installed.

[0018] Working principle: When gas is generated during the fermentation process of the raw materials inside the fermentation tank 1, when the gas accumulates to a certain amount, it is compressed and stored in the gas storage tank 3. Since the gas is continuously generated, the amount each time is not large. The use of the gas storage tank 3 is convenient for improving the processing efficiency. When the fermentation gas in the gas storage tank 3 accumulates to a certain amount, open the electric control valve B42 and the electric control valve C61, so that the fermentation gas is mixed with oxygen and enters the catalyst 8, thereby oxidizing and decomposing the generated odor molecules. In order to improve the mixing effect, a mixing tube 7 (with a spiral airway inside, existing technology, which can promote gas mixing) can be installed on the gas supply pipe B4 at the inlet side of the catalyst 8.

[0019] The applicant has also improved the catalyst 8 according to the characteristics of the odor molecules. The catalyst 8 consists of a shell, an ultraviolet lamp 85 and a catalytic filler 86; an air inlet hood 81 and an exhaust hood 83 are respectively arranged at the two ends of the shell, and a filler section 82 is in the middle, and the two ends of the filler section 82 are isolated by a sieve plate 84; the ultraviolet lamp is coaxially installed in the center of the filler section 82, and the two ends are fixed to the sieve plate 84, and the catalytic filler 86 is filled in the remaining space of the catalytic section; the catalytic filler 86 adopts a silica gel particle carrier carrying anatase-type nano-TiO2.

[0020] This catalyst 8 adopts ultraviolet light catalytic reaction. On the one hand, ultraviolet light has the effect of sterilization and disinfection. On the other hand, anatase nano-TiO2 has good organic catalytic ability under the irradiation of ultraviolet light. It has the advantages of deep oxidation at room temperature, low secondary pollution, and low operating cost. The carrier adopts silica gel particles. On the one hand, silica gel particles have high light transmittance, which can make ultraviolet light diffusely reflected and diffracted inside, so as to fully irradiate anatase nano-TiO2. On the other hand, silica gel particles have high porosity, which can make the gas fully contact with anatase nano-TiO2, and it is a good gas catalytic carrier.

[0021] In order to reduce the control difficulty, a pressure sensor A12 is installed on the top of the fermentation tank 1, and a pressure sensor B is installed on the gas storage tank 3. The pressure sensor A12 and the pressure sensor B are both connected to the PLC controller for feedback control of the electric control valve A21, the electric control valve B42, the electric control valve C61, the compression pump 22 and the catalyst 8.

[0022] The specific control process is as follows: a control threshold is set for the pressure sensor A12, that is, when the gas in the fermentation tank 1 accumulates and the pressure reaches the control threshold, the PLC controller controls the electric control valve A21 to open and the compression pump 22 to start until the fermentation tank 1 returns to normal pressure. Similarly, a control threshold is set for the pressure sensor B, that is, when the gas pressure in the gas storage tank 3 reaches the control threshold, the PLC controller controls the electric control valve B42 and the electric control valve C61 to open, and at the same time the ultraviolet lamp 85 is energized and the catalyst 8 is started.

[0023] As a safety measure, a safety pressure relief valve 11 is also installed on the top side of the fermentation tank 1, which can temporarily relieve pressure when the electric control valve A21 or the pressure sensor A12 fails.

[0024] The above is a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A fermentation system for gray board production, Features: It includes a fermentation tank, a gas storage tank, an oxygen tank and a catalyst; the exhaust port of the fermentation tank is connected to the gas storage tank through an air pipe A, and an electric control valve A, a compression pump and a check valve A are installed on the air pipe in sequence; the outlet of the gas storage tank is connected to the inlet of the catalyst through an air pipe B, and a check valve B and an electric control valve B are installed on the air pipe B in sequence; the gas outlet of the oxygen tank is connected to the outlet side of the electric control valve B on the air pipe B through an air pipe C, and an electric control valve C is installed on the air pipe C.

2. The fermentation system for gray board production according to claim 1, Features: A mixing tube is installed on the gas delivery pipe B at the inlet side of the catalyst.

3. The fermentation system for gray board production according to claim 1, Features: The catalyst consists of a shell, an ultraviolet lamp and a catalytic filler; an air inlet hood and an exhaust hood are respectively arranged at the two ends of the shell, a filler section is in the middle, and the two ends of the filler section are isolated by a sieve plate; the ultraviolet lamp is coaxially installed in the center of the filler section, and the two ends are fixed to the sieve plate, and the catalytic filler is filled in the remaining space of the catalytic section; the catalytic filler adopts a silica gel particle carrier carrying anatase-type nano-TiO2.

4. The fermentation system for gray board production according to claim 3, Features: A pressure sensor A is installed on the top of the fermentation tank, and a pressure sensor B is installed on the gas storage tank. The pressure sensor A and the pressure sensor B are both connected to a PLC controller for feedback control of the electric control valve A, the electric control valve B, the electric control valve C, the compression pump and the catalyst.

5. The fermentation system for gray board production according to claim 2, Features: A safety pressure relief valve is also installed on the top side of the fermentation tank.

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