Novel digestion tank pressure balancing and dust removing device

Abstract

The utility model discloses a novel pressure balancing and dust removing device for a digestion tank. The novel pressure balancing and dust removing device comprises a dust removing tank, an array gas ejector pipe, a check valve and the like, the dust removal device is characterized in that array gas ejector pipes are arranged at the bottom in the dust removal tank, nozzles face downwards and penetrate through a dust removal pipeline, and the pipeline is connected with the top of the lime slaking tank and provided with a check valve. An industrial water pipeline is arranged at the top of the dust removal tank; a water quality detector is arranged in the dust removal tank; during implementation, the dust removal tank is mounted at a position not higher than the bottom of the digestion tank and injected with water. During slurrying, water is added firstly, then slaked lime is added, and finally water is added, air enters the dust removal tank under positive pressure during feeding, and a check valve is sucked open under negative pressure during slurrying, so that the slurrying speed is increased. The device can effectively maintain the pressure balance of the digestion tank, improve the dust removal effect, intelligently discharge sewage and change water, relieve the blockage of accessory devices, reduce the cost and improve the efficiency.

Description

Technical Field

[0001] The utility model relates to the field of digestion tank pulping, and specifically relates to a novel pressure balance and dust removal device for a digestion tank. Background Art

[0002] Digestors for acid removal in thermal power plants and waste power plants are configured with lime slurry. Slaked lime or quicklime and water are respectively added to the digestor, and a lime slurry with a certain concentration is prepared by weighing. When preparing the slurry, the dust of slaked lime or the steam generated by quicklime will pollute the surrounding environment.

[0003] The existing solution is that the digestor adopts a sealed structure. In order to avoid lime caking and blockage and maintain positive and negative pressure balance, an exhaust fan and a dust collector are installed on the digestor to discharge the air or water vapor carrying dust during lime preparation. The air or water vapor is extracted by the fan and passes through a dust collector equipped with a tap water spray nozzle. The tap water will adsorb the lime dust and then mix it into the tap water and flow into the preparation tank. Since the water used in the dust collector of the digestor will affect the weighing of materials when feeding into the digestor, the dust collector of the digestor can only be started when adding water and cannot be started when feeding materials. Therefore, the inlet of the exhaust fan and the dust collector is seriously blocked, forming a sealed environment, resulting in the inability to maintain the positive and negative pressure balance of the digestor. When adding materials, the positive pressure in the digestor causes blockage of the auxiliary equipment of the digestor and tripping of the metering screw for adding materials. When discharging the slurry from the digestor, the negative pressure causes slow slurry discharge. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a novel pressure balance and dust removal device for a digestion tank, which effectively maintains the pressure balance in the digestion tank during feeding and other stages to solve the above problems.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A novel pressure balance and dust removal device for a digestion tank includes a dust removal tank. It is characterized in that an array of spray pipes is arranged at the bottom inside the dust removal tank, the nozzle direction of the array of spray pipes is downward, the array of spray pipes penetrates through a dust removal pipeline, the end of the dust removal pipeline is connected to the top of a lime digestion tank, a branch pipeline penetrates through the side of the dust removal pipeline close to the lime digestion tank, a check valve is installed on the branch pipeline, and the installation direction of the check valve is the one-way air inlet direction; the top of the dust removal tank penetrates through an industrial water pipeline to a water replenishment port.

[0007] The digestor adopts a sealed structure, and a stirrer is installed inside the lime digestion tank.

[0008] The installation position of the dust removal tank is not higher than the bottom height of the lime digestion tank, and the dust removal tank is filled with water, and the water level height is 80%-95% of the height of the dust removal tank.

[0009] One side of the bottom of the dust removal tank is provided with a sewage discharge pipe, and a sewage discharge valve is arranged on the sewage discharge pipe.

[0010] An inlet valve is installed on the industrial water pipe.

[0011] A flexible connection interface is arranged at the end of the dust removal pipe, and the dust removal pipe is connected to the top of the lime slaking tank through the flexible connection interface.

[0012] A water quality detector is arranged inside the dust removal tank, and a sewage discharge notification signal is triggered by detecting that the water quality inside the dust removal tank reaches a set value.

[0013] In specific implementation, first install the dust removal tank at a position not higher than the bottom height of the lime slaking tank, and inject an appropriate amount of water into the dust removal tank so that the water level height reaches 80%-95% of the height of the dust removal tank. Array jet pipes are arranged at the inner bottom of the dust removal tank, and their nozzles face downward and penetrate through the dust removal pipe. The end of the dust removal pipe is connected to the top of the lime slaking tank through a flexible connection interface, and a check valve is installed on the branch pipe close to the lime slaking tank side, and its installation direction is the one-way air inlet direction. When making pulp in the lime slaking tank, first add part of the water, then add hydrated lime, and finally add water again. Since the lime slaking tank is fully sealed, the lime slaking tank is under positive pressure during feeding, and the displaced air holds the check valve closed, and can only enter the dust removal tank. The air ejected from the array jet pipes passes through water filtration and dust removal and is discharged to the atmosphere through the industrial water pipe at the top of the dust removal tank. When discharging pulp from the lime slaking tank, the lime slaking tank is under negative pressure, the check valve is sucked open, and air enters, greatly accelerating the pulp discharging speed. The lime slaking tank adopts a sealed structure and a stirrer is installed inside. One side of the bottom of the dust removal tank is provided with a sewage discharge pipe with a sewage discharge valve, and a water quality detector is also arranged inside. When it is detected that the internal water quality reaches the set value, a sewage discharge notification signal is triggered, the sewage is discharged through the sewage discharge valve, and then clean water is replaced through the industrial water pipe at the top of the dust removal tank.

[0014] Compared with the prior art, the beneficial effects of the present utility model are:

[0015] In the feeding and each stage of making pulp in the lime slaking tank, through the unique structural design of the present utility model, the pressure balance inside the slaking tank can be effectively maintained. When feeding, under the positive pressure state, the air is displaced to the dust removal tank, and the check valve closes to ensure the one-way flow of gas; when discharging pulp, under the negative pressure state, the check valve opens, and air enters the slaking tank, accelerating the pulp discharging speed, and avoiding various problems caused by pressure imbalance, such as blockage of auxiliary equipment, blockage and tripping of metering screws, etc.

[0016] The nozzles of the array of spray pipes at the bottom inside the dust removal tank face downward, and cooperate with an appropriate amount of water inside the tank to form a good water filtration and dust removal system. During the pulping process, the air discharged from the digestion tank is filtered by water and then discharged to the atmosphere through the industrial water pipeline, greatly improving the dust removal effect and reducing environmental pollution.

[0017] A water quality detector is provided. When the water quality inside the dust removal tank reaches the set value, a sewage discharge notification signal is triggered, and the sewage with a high solid content is discharged through the sewage valve of the sewage pipeline. Then, clean water is added through the industrial water pipeline for water replacement, ensuring the continuous and efficient operation of the dust removal system.

[0018] This utility model greatly reduces the blockage of the auxiliary devices of the digestion tank and the metering screw, reduces equipment failures and maintenance costs. At the same time, it speeds up the pulping and discharging speeds, improves production efficiency, reduces power consumption, and brings significant economic benefits to the lime digestion tank pulping systems of thermal power plants and waste power plants.

[0019] This device has not only been successfully applied to the slaked lime digestion tank pulping system of waste power plants, but also applies to the quicklime and slaked lime digestion tank pulping systems of thermal power plants and waste power plants, and has a wide range of application prospects. Description of the Drawings

[0020] Figure 1 It is a connection schematic diagram of a novel digestion tank pressure balance and dust removal device of this utility model;

[0021] Figure 2 It is a structural schematic diagram of a novel digestion tank pressure balance and dust removal device of this utility model;

[0022] In the figure: 1. Dust removal tank; 11. Array of spray pipes; 12. Dust removal pipeline; 121. Branch pipeline; 122. Check valve; 123. Flexible connection interface; 13. Industrial water pipeline; 131. Inlet valve; 14. Sewage pipeline; 141. Sewage valve; 2. Lime digestion tank; 21. Agitator. Specific implementation method

[0023] Next, the technical solutions in the embodiments of this utility model will be completely described in conjunction with the drawings in the embodiments of this utility model.

[0024] As Figure 1-2As shown in the figure, a new type of pressure balance and dust removal device for a digestion tank includes a dust removal tank 1, characterized in that an array of spray pipes 11 is arranged at the bottom inside the dust removal tank 1. The nozzles of the array of spray pipes 11 face downward. The array of spray pipes 11 penetrates through a dust removal pipeline 12. The end of the dust removal pipeline 12 is connected to the top of a lime digestion tank 2. A branch pipeline 121 penetrates through the dust removal pipeline 12 on the side close to the lime digestion tank 2. A check valve 122 is installed on the branch pipeline 121. The installation direction of the check valve 122 is the one-way air intake direction. The top of the dust removal tank 1 penetrates through an industrial water pipeline 13 to a water replenishment port.

[0025] The digestion tank 2 adopts a sealed structure, and a stirrer 21 is installed inside the lime digestion tank 2.

[0026] The installation position of the dust removal tank 1 is not higher than the bottom height of the lime digestion tank 2, and the dust removal tank 1 is filled with water. The water level height is 80%-95% of the height of the dust removal tank 1.

[0027] A sewage discharge pipeline 14 is arranged on one side of the bottom of the dust removal tank 1, and a sewage discharge valve 141 is arranged on the sewage discharge pipeline 14.

[0028] An inlet valve 131 is installed on the industrial water pipeline 13.

[0029] A flexible connection interface 123 is arranged at the end of the dust removal pipeline 12, and the dust removal pipeline 12 is connected to the top of the lime digestion tank 2 through the flexible connection interface 123.

[0030] A water quality detector is arranged inside the dust removal tank 1, and a sewage discharge notification signal is triggered by detecting that the water quality inside the dust removal tank 1 reaches a set value.

[0031] In specific implementation, first install the dust removal tank 1 at a position not higher than the bottom height of the lime slaking tank 2, and inject an appropriate amount of water into the dust removal tank 1 so that the water level height reaches 80%-95% of the height of the dust removal tank 1. Arrange an array of air spray pipes 11 at the bottom inside the dust removal tank 1, with their nozzles facing downward and penetrating through the dust removal pipeline 12. The end of the dust removal pipeline 12 is connected to the top of the lime slaking tank 2 through a flexible connection interface 123, and a check valve 122 is installed on the branch pipeline 121 near the lime slaking tank 2 side, and its installation direction is the one-way air intake direction. When the lime slaking tank 2 makes pulp, first add part of the water, then add hydrated lime, and finally add water again. Since the lime slaking tank 2 is fully sealed, when the lime slaking tank 2 feeds materials, it is under positive pressure, and the displaced air holds the check valve 122 closed, and can only enter the dust removal tank 1. The air sprayed out by the array of air spray pipes 11 passes through water filtration and dust removal and is discharged to the atmosphere through the industrial water pipeline 13 at the top of the dust removal tank 1. When the lime slaking tank 2 discharges pulp, the lime slaking tank 2 is under negative pressure, sucking the check valve 122 open, and air enters, greatly accelerating the pulp discharge speed. The lime slaking tank 2 adopts a sealed structure and a stirrer 21 is installed inside. A sewage discharge pipeline 14 with a sewage discharge valve 141 is arranged on one side of the bottom of the dust removal tank 1, and a water quality detector is also installed inside. When it detects that the internal water quality reaches the set value, it triggers a sewage discharge notification signal, discharges the sewage through the sewage discharge valve 141, and then replaces the clean water through the industrial water pipeline 13 at the top of the dust removal tank 1.

Claims

1. A new type of digestion tank pressure balance and dust removal device, including a dust removal tank (1), characterized in that An array of jet pipes (11) is arranged at the inner bottom of the dust removal tank (1). The nozzles of the array of jet pipes (11) face downward. The array of jet pipes (11) penetrates through the dust removal pipeline (12). The end of the dust removal pipeline (12) is connected to the top of the lime slaking tank (2). A branch pipeline (121) is penetrated on one side of the dust removal pipeline (12) close to the lime slaking tank (2). A check valve (122) is installed on the branch pipeline (121). The installation direction of the check valve (122) is the one-way air inlet direction. The top of the dust removal tank (1) penetrates through to the water replenishing port through the industrial water pipeline (13).

2. A novel digestion tank pressure balance and dust removal device according to claim 1, characterized in that: The lime slaking tank (2) adopts a sealed structure, and a stirrer (21) is installed inside the slaking tank (2).

3. A novel digestion tank pressure balance and dust removal device according to claim 1, characterized in that: The installation position of the dust removal tank (1) is not higher than the bottom height of the lime slaking tank (2), and the dust removal tank (1) is filled with water. The water level height is 80%-95% of the height of the dust removal tank (1).

4. A novel digestion tank pressure balance and dust removal device according to claim 1, characterized in that: A sewage discharge pipeline (14) is arranged on one side of the bottom of the dust removal tank (1). A sewage discharge valve (141) is arranged on the sewage discharge pipeline (14).

5. A novel digestion tank pressure balance and dust removal device according to claim 1, characterized in that: An inlet valve (131) is installed on the industrial water pipeline (13).

6. A novel digestion tank pressure balance and dust removal device according to claim 1, characterized in that: A flexible connection interface (123) is arranged at the end of the dust removal pipeline (12). The dust removal pipeline (12) is connected to the top of the lime slaking tank (2) through the flexible connection interface (123).

7. A novel digestive tank pressure balance and dust removal device according to claim 1, characterized in that: A water quality detector is arranged inside the dust removal tank (1). When the water quality inside the dust removal tank (1) reaches the set value, a sewage discharge notification signal is triggered.

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