Nitrate smoke emission treatment system for nitrocotton boiling and washing barrel

Abstract

The utility model relates to the technical field of environmental protection of nitrocotton manufacturing, and discloses a nitrocotton boiling and washing barrel nitrate smoke emission treatment system. The nitrocotton boiling and washing barrel nitrate smoke emission treatment system comprises a boiling and washing barrel and a waste steam recycling barrel which are communicated, the interior of the boiling and washing barrel is used for boiling and washing nitrocotton, the waste steam recycling barrel is used for absorbing waste steam generated in the nitrocotton boiling and washing process, and the nitrocotton boiling and washing barrel nitrate smoke emission treatment system further comprises a smoke steam emission pipe, a smoke steam recycling pipe, a nitrate smoke concentration detector, a vacuum pump and a water seal box; one end of the smoke and steam discharge pipe is communicated with the waste steam recovery barrel, and the nitrate smoke concentration detector is arranged on the smoke and steam discharge pipe and used for detecting the concentration of nitrate smoke in the smoke and steam discharge pipe; one end of the smoke steam recovery pipe is communicated with the other end of the smoke steam discharge pipe, the other end of the smoke steam recovery pipe is communicated with the air inlet end of the vacuum pump, the water seal tank is communicated with the air outlet end of the vacuum pump, and the vacuum pump is used for sucking nitrate smoke into the water seal tank. The technical problem of fugitive emission of nitro smoke generated by nitrocotton boiling and washing is solved, the environmental protection property is better, and the cost is lower.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental protection of nitrocellulose manufacturing, in particular to a nitrocellulose boiling and washing barrel gunpowder smoke emission treatment system. Background Art

[0002] A crucial step in the production of nitrocellulose is the boiling and washing process, which primarily controls the viscosity and stability of the product, ensuring that the viscosity meets requirements and that it can be safely stored and used. Boiling and washing involves boiling in water at relatively high temperatures to remove residual nitric and sulfuric acid and unstable sulfates from the cotton fiber cavities. However, the boiling and washing process also results in a small amount of denitrification of the nitrocellulose. The resulting fumes are yellow-brown in color. After boiling and washing, the open-pressure process is discharged directly from the steam exhaust pipe, resulting in unorganized fumes emissions. In existing technologies, although a gas-liquid mixer has been installed to address the issue of direct fumes emissions, some fumes, especially those with higher concentrations, cannot be detected and fully absorbed immediately, leading to direct emissions, increasing environmental risks. Utility Model Content

[0003] Based on the above, the purpose of this utility model is to provide a nitrocellulose boiling and washing barrel gunpowder smoke emission treatment system, which solves the technical problem of unorganized emission of gunpowder smoke generated by nitrocellulose boiling and washing, has better environmental protection and lower cost.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A nitrocellulose boiling and washing barrel smoke emission treatment system, comprising a boiling and washing barrel and a waste steam recovery barrel connected to each other, wherein the boiling and washing barrel is used for boiling and washing the nitrocellulose, and the waste steam recovery barrel is used for absorbing waste steam generated during the boiling and washing process of the nitrocellulose. The system is characterized by further comprising a smoke exhaust pipe, a smoke recovery pipe, a smoke concentration detector, a vacuum pump, and a water seal box;

[0006] One end of the smoke exhaust pipe is connected to the waste steam recovery barrel, and the smoke concentration detector is arranged on the smoke exhaust pipe to detect the smoke concentration in the smoke exhaust pipe;

[0007] One end of the smoke recovery pipe is connected to the other end of the smoke exhaust pipe, the other end of the smoke recovery pipe is connected to the air inlet end of the vacuum pump, the water seal box is connected to the air outlet end of the vacuum pump, and the vacuum pump is used to draw smoke into the water seal box.

[0008] As a preferred solution for the nitrocellulose boiling and washing barrel smoke emission treatment system, it also includes a control module. The smoke concentration detector and the vacuum pump are electrically connected to the control module. The control module is used to receive the detection signal of the smoke concentration detector and to control the start and stop of the vacuum pump.

[0009] As a preferred solution for the nitrocellulose boiling and washing barrel gunpowder smoke emission treatment system, the control module includes a comparator, which has a preset threshold value. The comparator is used to receive the detection signal value of the gunpowder smoke concentration detector, and compare the detection signal value with the preset threshold value to generate an output signal. The control module is used to control the start and stop of the vacuum pump according to the output signal.

[0010] As an optimal solution for the nitrocellulose boiling and washing barrel gunpowder smoke emission treatment system, it also includes a wastewater discharge pipe. The water seal box is provided with a water inlet and a drain outlet. The water inlet is used to connect to an external water supply source, and the wastewater discharge pipe is connected to the drain outlet.

[0011] As a preferred solution for the nitrocellulose boiling and washing barrel gunpowder smoke emission treatment system, it also includes a control valve, which is arranged on the drain outlet or the wastewater discharge pipe and is used to control the on-off of the drain outlet or the wastewater discharge pipe.

[0012] As a preferred solution for the nitrocellulose boiling and washing barrel gunpowder smoke emission treatment system, the control valve is an electric valve or a pneumatic valve.

[0013] As a preferred solution for the nitrocellulose boiling and washing barrel gunpowder smoke emission treatment system, the water seal box contains water at room temperature.

[0014] The beneficial effects of the utility model are:

[0015] The utility model provides a nitrocellulose boiling and washing barrel smoke emission treatment system. The large amount of smoke generated after the nitrocellulose is boiled and washed is first partially absorbed by a waste steam recovery barrel. The remaining smoke is sucked by a vacuum pump and flows through a smoke exhaust pipe and a smoke recovery pipe into a water seal box for absorption, thereby achieving organized smoke treatment and avoiding atmospheric pollution. Simultaneously, a smoke concentration detector can detect the smoke concentration in real time, facilitating the switching of the vacuum pump, thus saving energy and protecting the environment and preventing the vacuum pump from performing useless work. The nitrocellulose boiling and washing barrel smoke emission treatment system has a simple structure, is easy to assemble, and is relatively low in cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0017] Figure 1 The utility model is a structural diagram of a nitrocellulose boiling and washing barrel gunpowder smoke emission treatment system provided by an embodiment of the present invention.

[0018] In the picture:

[0019] 1. Boiling and washing barrel; 2. Waste steam recovery barrel; 3. Smoke exhaust pipe; 4. Smoke recovery pipe; 5. Smoke concentration detector; 6. Vacuum pump; 7. Water seal box; 8. Wastewater drain pipe; 9. Control valve. DETAILED DESCRIPTION

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0021] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0022] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0023] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In the description of this utility model, unless otherwise specified, "plurality" means two or more. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and do not have any special meaning.

[0024] like Figure 1As shown, this embodiment provides a nitrocellulose boiling and washing barrel gunpowder smoke emission treatment system, which includes a boiling and washing barrel 1 and a waste steam recovery barrel 2 that are connected. The boiling and washing barrel 1 is used for boiling and washing nitrocellulose, and the waste steam recovery barrel 2 is used to absorb waste steam generated during the boiling and washing of nitrocellulose. Since the water temperature in the waste steam recovery barrel 2 is higher than that of normal temperature water, the absorption effect of the gunpowder smoke is not good. After the waste steam recovery barrel 2 absorbs part of the gunpowder smoke, some gunpowder smoke and steam will be discharged from the waste steam recovery barrel 2. In order to prevent the discharged smoke and steam from polluting the atmosphere, the nitrocellulose boiling and washing barrel smoke emission treatment system also includes a smoke exhaust pipe 3, a smoke recovery pipe 4, a smoke concentration detector 5, a vacuum pump 6 and a water seal box 7. One end of the smoke exhaust pipe 3 is connected to the waste steam recovery barrel 2. The smoke concentration detector 5 is set on the smoke exhaust pipe 3 and is used to detect the smoke concentration in the smoke exhaust pipe 3. One end of the smoke recovery pipe 4 is connected to the other end of the smoke exhaust pipe 3, and the other end of the smoke recovery pipe 4 is connected to the air inlet end of the vacuum pump 6. The water seal box 7 is connected to the air outlet end of the vacuum pump 6. The vacuum pump 6 is used to attract smoke into the water seal box 7. Among them, the smoke concentration detector 5 can be a commercially available smoke concentration detector 5, and the specific structure is not repeated here. The large amount of smoke generated after the nitrocellulose is boiled and washed is first partially absorbed by the waste steam recovery barrel 2. The remaining smoke is sucked by a vacuum pump 6 and flows through the smoke exhaust pipe 3 and the smoke recovery pipe 4 into the water seal box 7 for absorption, thus achieving organized smoke treatment and preventing atmospheric pollution. At the same time, a smoke concentration detector 5 can detect the smoke concentration in real time, facilitating the switching of the vacuum pump 6, saving energy and protecting the environment, and preventing the vacuum pump 6 from performing useless work. This nitrocellulose boiling and washing barrel smoke emission treatment system has a simple structure, is easy to assemble, and is low in cost.

[0025] The smoke recovery pipe and the smoke exhaust pipe are detachably connected, making it easy to remove or assemble the smoke recovery pipe as needed.

[0026] Preferably, the water seal box 7 is filled with water at room temperature or a relatively low concentration of 3-5% dilute nitric acid solution, which helps to improve the absorption efficiency of the gun smoke.

[0027] In this embodiment, the nitrocellulose boiling and washing barrel smoke emission treatment system further includes a control module, to which both the smoke concentration detector 5 and the vacuum pump 6 are electrically connected. The control module is configured to receive detection signals from the smoke concentration detector 5 and to control the start and stop of the vacuum pump 6. By controlling the start and stop of the vacuum pump 6 through the control module, the smoke is automatically absorbed and treated, eliminating the need for repeated manual operation, saving manpower and improving smoke treatment efficiency.

[0028] Specifically, the control module includes a comparator with a preset threshold. The comparator is used to receive the detection signal value from the smoke concentration detector 5, compare the detection signal value with the preset threshold value, and generate an output signal. The control module is used to control the start and stop of the vacuum pump 6 based on the output signal. The smoke concentration detector 5 detects the smoke concentration in the smoke exhaust pipe 3 in real time and outputs the detection signal value to the comparator of the control module. The detection signal value can be an analog value or the detected smoke concentration value. The comparator compares the detection signal value with the preset threshold value. If the detection signal value is greater than or equal to the preset threshold value, the comparator generates a first control signal, and the control module controls the vacuum pump 6 to start, i.e., absorb the smoke. If the detection signal value is less than the preset threshold value, the comparator generates a second control signal, and the control module controls the vacuum pump 6 to stop, i.e., stop absorbing the smoke. Through the smoke concentration detector 5, the control module, and the vacuum pump 6, fully automatic smoke treatment is achieved, eliminating the need for human operation, saving manpower, and improving processing efficiency. Among them, the preset threshold is set according to specific actual needs, that is, when the smoke concentration reaches a certain level, it needs to be processed, that is, the preset threshold is set.

[0029] Furthermore, the nitrocellulose boiling and washing barrel gunpowder smoke emission treatment system also includes a wastewater discharge pipe. A drain outlet is provided on the water sealing box 7. The wastewater discharge pipe is connected to the drain outlet. The sewage after absorbing the gunpowder smoke is discharged through the wastewater drain pipe 8 for subsequent sewage treatment or the produced wastewater is directly reused in the boiling and washing supplementary water system.

[0030] In this embodiment, the water seal box 7 is further provided with a water inlet. After the dilute acid water is discharged, clean water is introduced through the water inlet to continue absorbing and treating the gunpowder smoke.

[0031] Specifically, the nitrocellulose boiling and washing barrel smoke emission treatment system also includes a control valve 9, which is installed on the drain outlet or wastewater discharge pipe and is used to control the opening and closing of the drain outlet or wastewater discharge pipe. When the sewage in the sealing water tank 7 needs to be discharged, the control valve 9 is opened to allow the sewage to be discharged through the wastewater discharge pipe. After the discharge is completed, the control valve 9 is closed.

[0032] Optionally, the control valve 9 is an electric valve or a pneumatic valve, which is set according to actual needs.

[0033] Note that the above are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of protection of the present invention. Therefore, while the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A nitrocellulose boiling and washing barrel smoke emission treatment system, comprising a boiling and washing barrel and a waste steam recovery barrel connected to each other, wherein the boiling and washing barrel is used for boiling and washing nitrocellulose, and the waste steam recovery barrel is used for absorbing waste steam generated during the boiling and washing process of nitrocellulose, characterized in that: It also includes a smoke exhaust pipe, a smoke recovery pipe, a smoke concentration detector, a vacuum pump and a water seal box; One end of the smoke exhaust pipe is connected to the waste steam recovery barrel, and the smoke concentration detector is arranged on the smoke exhaust pipe to detect the smoke concentration in the smoke exhaust pipe; One end of the smoke recovery pipe is connected to the other end of the smoke exhaust pipe, the other end of the smoke recovery pipe is connected to the air inlet end of the vacuum pump, the water seal box is connected to the air outlet end of the vacuum pump, and the vacuum pump is used to draw smoke into the water seal box.

2. The nitrocellulose boiling and washing barrel smoke emission treatment system according to claim 1 is characterized in that: It also includes a control module, and the smoke concentration detector and the vacuum pump are both electrically connected to the control module. The control module is used to receive the detection signal of the smoke concentration detector and to control the start and stop of the vacuum pump.

3. The nitrocellulose boiling and washing barrel smoke emission treatment system according to claim 2 is characterized in that: The control module includes a comparator having a preset threshold value. The comparator is used to receive the detection signal value of the smoke concentration detector and generate an output signal after comparing the detection signal value with the preset threshold value. The control module is used to control the start and stop of the vacuum pump according to the output signal.

4. The nitrocellulose boiling and washing barrel smoke emission treatment system according to claim 1 is characterized in that: It also includes a wastewater discharge pipe. The water seal box is provided with a water inlet and a water outlet. The water inlet is used to connect to an external water supply source, and the wastewater discharge pipe is connected to the water outlet.

5. The nitrocellulose boiling and washing barrel smoke emission treatment system according to claim 4 is characterized in that: It also includes a control valve, which is arranged on the drain outlet or the wastewater discharge pipe and is used to control the on-off of the drain outlet or the wastewater discharge pipe.

6. The nitrocellulose boiling and washing barrel smoke emission treatment system according to claim 5 is characterized in that: The control valve is an electric valve or a pneumatic valve.

7. The nitrocellulose boiling and washing barrel smoke emission treatment system according to claim 1 is characterized in that: The water seal box contains water at normal temperature.

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