A safety device for stabilizing odor in the pulp industry

Abstract

This utility model relates to the field of odor control technology in pulp and paper mills, specifically disclosing an odor stabilizing and safety device for the pulp industry. It includes a pressure-stabilizing tank vertically positioned between the odor collection outlet and the odor treatment equipment. An odor inlet pipe is centrally located at the lower end of the pressure-stabilizing tank, extending into the tank. An emergency odor outlet pipe is centrally located at the upper end of the pressure-stabilizing tank. A sealing pipe is inverted and placed above the odor inlet pipe inside the pressure-stabilizing tank. The sealing pipe is sealed at the top and open at the bottom, with its top not contacting the upper end of the odor inlet pipe. The vertical height of the sealing pipe should be greater than the liquid level difference formed by the maximum and minimum odor pressures. A clean water inlet pipe is located at the lower part of one side of the pressure-stabilizing tank, and an overflow pipe is located in the middle of the other side. This utility model has multiple functions, including odor network pressure stabilization, safety valve, and prevention of odor overflow. One set of equipment integrates the functions of multiple devices, saving both investment costs and installation space.

Description

Technical Field

[0001] This utility model belongs to the field of odor system treatment in the pulp industry, and specifically relates to a odor stabilization and safety device for the pulp industry. Background Technology

[0002] The pulp mill's digester sprays gas intermittently, resulting in significant pressure fluctuations in the odorous gas. If the high-pressure zone is not effectively reduced during digester spraying, it will affect digester output and damage downstream odor treatment equipment. In extreme cases, the pressure may exceed the system's operating pressure, requiring the pipeline network to be equipped with emergency pressure relief measures. As the odorous gas is toxic and harmful, leaks should be minimized. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a odor stabilization and safety device for the pulp industry, which has multiple functions such as odor pipeline pressure stabilization, safety valve, and prevention of odor overflow. One set of equipment realizes the integrated functions of multiple devices, which can save investment costs and installation space.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a pressure stabilizing and safety device for odor in the pulp industry, comprising a pressure stabilizing tank vertically arranged between the odor collection outlet and the odor treatment equipment; an odor inlet pipe centrally located at the lower end of the pressure stabilizing tank, extending into the pressure stabilizing tank; an odor emergency outlet pipe centrally located at the upper end of the pressure stabilizing tank; a sealing pipe inverted on top of the odor inlet pipe inside the pressure stabilizing tank; the sealing pipe is sealed at the top and open at the bottom, with its top not contacting the upper end of the odor inlet pipe; the vertical height of the sealing pipe should be greater than the liquid level difference formed by the maximum and minimum odor pressures; a clean water inlet pipe is located at the lower part of one side of the pressure stabilizing tank, and an overflow pipe is located at the middle of the other side of the pressure stabilizing tank.

[0005] Optionally, the pressure stabilizing tank is shaped like a cylinder with a cylindrical center and conical ends.

[0006] Furthermore, the lower end of the sealing tube is located at the horizontal connection between the middle cylindrical part and the lower conical part of the pressure stabilizing tank.

[0007] Optionally, the distance between the top of the sealing tube and the uppermost end of the odor inlet tube is limited to 100~150mm.

[0008] Furthermore, the height of the clean water inlet pipe is not higher than the lower end of the sealing pipe.

[0009] Furthermore, the overflow pipe is installed at a height slightly lower than the highest point of the odor inlet pipe.

[0010] Optionally, the sealing tube is fixedly connected to the inner wall of the pressure stabilizing tank by a number of support members.

[0011] Optionally, the sidewall of the sealing tube is parallel to the inner wall of the pressure stabilizing tank.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. In some sections of the odor control system where the pressure is unstable, adding a pressure stabilizing tank to the collection outlet pipeline can help to reduce peak pressures and stabilize odor fluctuations, which is beneficial to the efficiency of subsequent system treatment.

[0013] 2. If the pressure at the odor collection end is abnormally high, the pressure needs to be released to avoid damaging the system equipment.

[0014] 3. Some components of the odor are water-soluble and accumulate over a long period of time, causing the water to smell bad and odor to escape. This utility model has a built-in water replacement function, which continuously replenishes water at a small flow rate through the clean water injection pipe, and discharges excess water from the overflow pipe to dilute the odor components in the water, thus effectively solving this problem.

[0015] 4. It innovatively integrates the functions of multiple devices into one, meeting the needs of various complex working conditions. It has a simple structure, high reliability, and does not require the consumption of electrical energy. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram showing the arrangement of the pressure stabilizing tank of this utility model; Figure 2 This is a schematic diagram of the balanced state of the equipment of this utility model; Figure 3 This is a schematic diagram of the overpressure release state of the device of this utility model.

[0017] Explanation of reference numerals in the attached diagram: 1. Pressure stabilizing tank; 2. Odor inlet pipe; 3. Odor emergency outlet pipe; 4. Sealing pipe; 5. Clean water inlet pipe; 6. Overflow pipe. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.

[0019] A type of odor stabilizing and safety device for the pulp industry, such as Figure 1As shown, a pressure stabilizing tank 1 is vertically arranged between the odor collection outlet and the odor treatment equipment. Odors continuously enter both the odor treatment equipment and the pressure stabilizing tank simultaneously. Specifically, the pressure stabilizing tank 1 is shaped like a cylinder with a cylindrical shape in the middle and conical shapes at both ends. This design serves two purposes: firstly, pressure stabilization relies mainly on the space in the middle, while the smaller ends save materials; secondly, the pressure resistance of the cylindrical shape in the middle is far superior to that of a cuboid.

[0020] like Figure 2 , Figure 3 As shown, the pressure stabilizing tank 1 has an odor inlet pipe 2 centrally located at its lower end, and an odor inlet pipe 3 extending into the pressure stabilizing tank 1. The highest point of the odor inlet pipe 2 is slightly higher than the overflow port 6 to ensure that water will not backflow from the odor inlet pipe 2 when there is no pressure in the odor. The size of the pressure stabilizing tank 1 is related to the gas volume difference when the odor fluctuates, and half of the water volume should be greater than the compressed volume of the odor at its highest pressure. When the odor pressure increases, it enters the pressure stabilizing tank 1 through the odor inlet pipe 3. An odor emergency outlet pipe 3 is centrally located at the upper end of the pressure stabilizing tank 1. When the odor pressure exceeds the maximum working pressure, the odor passes through the water and is discharged in an emergency through the odor emergency outlet pipe 3. The pressure stabilizing tank 1 is equipped with a sealing tube 4 that is inverted on the upper end of the odor inlet pipe. The sealing tube 4 is a circular tube with a sealed top and an open bottom. The side wall of the sealing tube 4 is parallel to the inner wall of the pressure stabilizing tank 1. The top of the sealing tube 4 does not contact the upper end of the odor inlet pipe 2. The sealing tube 4 is welded to the inner wall of the pressure stabilizing tank 1 through several support members. Specifically, the distance between the top of the sealing tube 4 and the uppermost end of the odor inlet pipe 2 is limited to 100~150mm. The vertical height of the sealing tube 4 should be greater than the liquid level difference formed by the maximum and minimum pressure of the odor. The lower end of the sealing tube 4 is located at the horizontal connection between the middle cylindrical part and the lower conical part of the pressure stabilizing tank 1.

[0021] like Figure 2 , Figure 3 As shown, a clean water inlet pipe 5 is installed on the lower part of one side of the pressure stabilizing tank 1. The clean water inlet pipe 5 is connected to the pressure stabilizing tank 1 and its installation height is not higher than the lower end of the sealing pipe 4. An overflow pipe 6 is installed on the other side of the pressure stabilizing tank 1. The overflow pipe 6 is connected to the pressure stabilizing tank 1. The installation height of the overflow pipe 6 is slightly lower than the highest point of the odor inlet pipe 2. That is, the installation height of the overflow pipe 6 should be greater than the liquid level difference formed by the maximum and minimum pressure of the odor, so as to prevent backflow of water into the odor inlet pipe 2. The clean water inlet pipe 5 is set at the bottom and the overflow pipe 6 is set at the top, so that the water replacement effect is optimal.

[0022] In equilibrium, clean water is continuously injected at a small flow rate through the clean water inlet pipe 5, and excess water is discharged through the overflow pipe 6. The water body is continuously replaced to prevent the water body from absorbing too much odor and overflowing when saturated. In pressure stabilization mode, the odor will discharge excess water through the overflow pipe 6. When the pressure decreases, water is continuously added to allow the equipment to return to equilibrium. When the odor pressure increases, excess water is discharged through the overflow pipe 6, allowing the liquid level to reach a new equilibrium and preventing excessive water from flowing back into the odor system through the odor inlet pipe 2.

[0023] The following is in conjunction with the appendix Figure 1 To be continued Figure 3 The pressure stabilization principle of the odor stabilization and safety equipment for the pulp industry of this utility model is introduced as follows: (1) Equilibrium state: When odorous gas enters the pressure stabilizing tank 1 from the odorous gas inlet pipe 2, the odorous gas itself has a certain pressure, and a liquid level difference H1 is formed inside the pressure stabilizing tank 1. The liquid level difference H1 and the odorous gas pressure are in equilibrium. The formula for the relationship between water pressure and height is P=ρgh, and the height of the equipment H1 can be designed according to the odorous gas pressure. For example, the design height difference of H1 for an odorous gas pressure device with a pressure of 10 kPa is 1 m.

[0024] (2) Stable pressure state: When the odor pressure suddenly increases, the odor continues to compress the liquid surface. When the odor pressure reaches its maximum value, a new height difference H2 is formed in the liquid level. At this time, the liquid level height difference H2 and the odor pressure form a new equilibrium state. During the process of the liquid level height difference increasing from H1 to H2, the energy of the rapid fluctuation of odor pressure is absorbed, making the pressure fluctuation of the odor pipeline network more gradual.

[0025] (3) Overpressure release state: When the odor collection equipment is in an abnormal situation, the pressure exceeds the maximum working pressure. The odor continues to compress the liquid surface until the liquid level difference exceeds H. The water will break through the water pressure and flow out of the equipment from the overflow pipe 6. The odor will be discharged from the odor emergency outlet pipe 3, so that the pressure of the entire odor pipeline network does not exceed the maximum working pressure, thereby protecting the odor collection equipment and odor treatment equipment.

[0026] Wherein, H1 represents the liquid level difference formed when the system is stable, ρgH1<ΔP, ΔP represents the liquid level difference height corresponding to the maximum working pressure of the odor, the same below; H2 represents the new liquid level difference formed under the maximum working pressure of the odor, ρgH2≤ΔP; H represents the critical point that breaks the liquid level balance when the odor is under abnormally high pressure, the critical point represents the liquid level difference height corresponding to the pressure, ρgH=ΔP, when the odor pressure exceeds the critical point, the liquid level difference height exceeds H, the odor will break through the water pressure and be discharged from the emergency discharge port to release the pressure.

[0027] The formula for the relationship between water pressure and height is P=ρgh, and the height H of the equipment can be designed based on the odor pressure. For example, if the maximum working pressure of the odor is 20 kPa, the height H of the equipment can be designed to be 2m.

[0028] This invention solves the problem of conventional pressure tanks being unable to provide emergency discharge. It also addresses the issue of safety valves failing to achieve pressure stabilization. The water balance design of this equipment not only improves operational reliability but also prevents the natural volatilization and overflow of odorous components after the water becomes saturated.

[0029] The above are merely preferred embodiments of this utility model and are not intended to limit or restrict this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection declared by this utility model.

Claims

1. A paper pulp industry odor pressure stabilizing safety device, characterized by, The device includes a pressure stabilizing tank vertically positioned between the odor collection outlet and the odor treatment equipment. An odor inlet pipe is centrally located at the lower end of the pressure stabilizing tank, extending into the tank. An emergency odor outlet pipe is centrally located at the upper end of the pressure stabilizing tank. A sealing pipe is inverted and placed above the odor inlet pipe inside the pressure stabilizing tank. The sealing pipe is sealed at the top and open at the bottom, with its top not contacting the upper end of the odor inlet pipe. The vertical height of the sealing pipe should be greater than the liquid level difference formed by the maximum and minimum odor pressures. A clean water inlet pipe is located at the lower part of one side of the pressure stabilizing tank, and an overflow pipe is located at the middle of the other side of the pressure stabilizing tank.

2. The paper pulp industry odor pressure stabilizing safety device according to claim 1, characterized in that, The pressure stabilizing tank is shaped like a cylinder with a cylindrical center and conical ends.

3. The paper pulp industry odor pressure stabilizing safety device according to claim 2, characterized in that, The lower end of the sealing tube is located at the horizontal connection between the middle cylindrical part and the lower conical part of the pressure stabilizing tank.

4. The paper pulp industry odor pressure stabilizing safety device according to claim 1, characterized in that, The distance between the top of the sealing tube and the uppermost end of the odor inlet tube is limited to 100~150mm.

5. The paper pulp industry odor pressure stabilizing safety device according to claim 3, characterized in that, The height of the clean water inlet pipe shall not be higher than the lower end of the sealing pipe.

6. The paper pulp industry odor pressure stabilizing safety device according to claim 4, characterized in that, The overflow pipe is installed at a height slightly lower than the highest point of the odor inlet pipe.

7. The paper pulp industry odor pressure stabilizing safety device according to claim 3, characterized in that, The sealing tube is fixedly connected to the inner wall of the pressure stabilizing tank by several supporting members.

8. The paper pulp industry odor pressure stabilizing safety device according to claim 1, characterized in that, The side wall of the sealing tube is parallel to the inner wall of the pressure stabilizing tank.

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