Nitrous oxide safety production monitoring system

Abstract

The utility model discloses a nitrous oxide safety production monitoring system, and relates to the technical field of nitrous oxide safety production. The nitrous oxide safety production monitoring system comprises a reaction unit and a production monitoring module, the reaction unit comprises a safety water-sealed tank, a reactor and a condenser which are connected in sequence, and the production monitoring module comprises a monitoring unit used for isolating the reactor and monitoring the temperature. And a refrigeration unit for cooling water circulation on the reactor and the condenser. Isolation and sealing are carried out through the monitoring unit, auxiliary cooperation of the refrigeration unit is utilized, when leakage occurs, namely after the gas detector detects the concentration of nitrous oxide, starting of main pipeline transmission, namely starting of the electromagnetic valve and the anti-explosion axial flow fan, is rapidly completed through gas alarm control, and therefore the leakage of nitrous oxide is avoided. Nitrous oxide generated by ammonium nitrate is accelerated to quickly enter the condenser.

Description

TECHNICAL FIELD

[0001] The utility model relates to a technical field of nitrogen monoxide safe production, concretely is nitrogen monoxide safe production monitoring system. BACKGROUND

[0002] Nitrogen monoxide, also known as nitrous oxide or laughing gas, has a chemical formula of N2O. At room temperature, nitrogen monoxide is a colorless and non-flammable gas with a slightly sweet odor and a mild narcotic effect that can cause people to laugh. As an important industrial gas, nitrogen monoxide is mainly used as an anesthetic in traditional applications. With the development of modern industry, high-purity nitrogen monoxide is increasingly used in the electronics industry, mainly in the fields of integrated circuits, liquid crystal displays, and other technologies, and the demand is growing.

[0003] In industry, nitrogen monoxide is usually prepared by heating ammonium nitrate NH4NO3 to about 250°C. This process produces nitrogen monoxide and water vapor, with the reaction equation being: NH4NO3→N2O+2H2O. To improve the purity of the product, phosphates can be added and the reaction temperature can be controlled.

[0004] As disclosed in a device and method for preparing nitrogen monoxide in Chinese patent publication No. CN108483415A, the device is equipped with a safety water seal tank and a temperature automatic control system, effectively ensuring the safety and reliability of production. The method has high automatic control degree, ensures product purity, and has simple process flow.

[0005] However, in actual production processes, the sealing of the reactor has not been further guaranteed based on the existing basis, and there is still a risk of nitrogen monoxide leakage. Inhaling nitrogen monoxide by mistake can cause serious health problems such as paralysis, so in addition to further controlling the temperature during production, it is necessary to monitor the concentration of nitrogen monoxide and whether it leaks in real time during production. UTILITY MODEL CONTENTS

[0006] To address the deficiencies of the prior art, the utility model provides a nitrogen monoxide safe production monitoring system to solve the problems raised in the background art.

[0007] In order to achieve the above object, the utility model discloses the following technical scheme: The system includes reaction unit and production monitoring module, the reaction unit includes safe water seal tank, reactor and condenser that connect gradually, the production monitoring module includes the monitoring unit for isolating reactor and monitoring temperature, and the refrigeration unit for the cooling water circulation on reactor and condenser, when the heating decomposition of ammonium nitrate in the reactor in the prior art, the monitoring unit is used to isolate and seal, and the real-time monitoring of dinitrogen monoxide concentration is completed under the sealed condition, and the auxiliary cooperation of refrigeration unit is used, and the emergency reaction stagnation in the production process is completed.

[0008] The further improvement of the utility model technical scheme lies in: the monitoring unit includes airtight chamber, the airtight chamber is arranged outside the reactor and isolates the reactor, a plurality of gas detectors are arranged in the monitoring pipeline extended by the airtight chamber, the gas alarm controller is connected with the gas detectors through RS data transmission, the gas alarm controller is provided with response alarm concentration value, the gas alarm controller is electrically connected with a relay and an explosion-proof sound and light alarm lamp, the electromagnetic valve and the explosion-proof axial flow fan are connected with the relay controlled by the gas alarm controller, and the electromagnetic valve and the explosion-proof axial flow fan are respectively installed on the main branch pipeline of the reactor and the condenser.

[0009] It should be noted that the gas alarm controller is the hub device connected with multiple ports, so the ERUN-PG36E type gas alarm controller made of ST83C52 single-chip microcomputer can be used in the embodiment, and the point type gas detector, wireless gas detector, etc. can be selected as the gas detector for directly monitoring the concentration, the electromagnetic valve and the explosion-proof axial flow fan are arranged on the main pipeline of the reactor and the condenser, when the leakage occurs, after the gas detector detects the concentration of dinitrogen monoxide, the gas alarm controller quickly opens the main pipeline, the electromagnetic valve and the explosion-proof axial flow fan are started, and the dinitrogen monoxide generated by ammonium nitrate is quickly introduced into the condenser, which can prevent the airtight chamber from being not airtight, and the overflow of dinitrogen monoxide is reduced to the maximum extent.

[0010] The further improvement of the utility model technical scheme lies in: the gas alarm controller can set response alarm concentration value, the gas alarm controller adopts bus system connection mode and connects a plurality of the gas detector in parallel, the gas alarm controller is wirelessly transmitted and is connected with mobile terminal, in the safety production monitoring system, the alarm concentration value should be set in, once the concentration of dinitrogen monoxide is detected in the closed room, it means that the reactor or related pipeline leaks, and in the industrial processing of unmanned factory building, the alarm concentration value should be set corresponding value, even if small range leakage appears, through the main pipeline of reactor and condenser, rapid discharge can also greatly reduce the overflow amount of dinitrogen monoxide, avoid the raw material waste of ammonium nitrate.

[0011] The further improvement of the utility model technical scheme lies in: the refrigeration unit includes first temperature instrument, heating assembly, cooling water pipe and spray water pipe, the first temperature instrument is arranged at the end face of reactor shell, the temperature of reactor is controlled by the heating assembly arranged on it, the cooling water pipe is connected with the spray water pipe through the connecting pipeline, and the first circulating pump and the first check valve are arranged on the connecting pipeline, it should be pointed out that when the first temperature instrument detects that the temperature in the reactor is too high, the effect of the heat conduction mode relied on by the cooling water pipe is poor, therefore, in addition to the traditional cooling, the upper spray mode is adopted in the embodiment, emergency cooling and fusing are realized, and the self-control degree of reaction temperature is further increased.

[0012] The further improvement of the utility model technical scheme lies in: in order to complete the independent circulation of cooling water in the system and improve the utilization rate of cooling water, the cooling water pipe is connected with the condensate water tank in which cooling liquid is arranged, and the cooling liquid enters the cooling water pipe under the control of the second check valve, and the condensate water tank controls the cooling liquid to enter and exit the condenser under the control of the second circulating pump.

[0013] The further improvement of the utility model technical scheme lies in: in order to improve the efficiency of the thermal decomposition of ammonium nitrate, the reactor is provided with stirring blades, the stirring blades are arranged on the main shaft in array, and the main shaft is rotationally connected with the reactor.

[0014] The further improvement of the utility model technical scheme lies in: the second temperature instrument is arranged at the end face of the condenser shell.

[0015] Beneficial effects

[0016] Compared with the prior art, the beneficial effects of this utility model are: isolation and sealing are achieved through the monitoring unit, and real-time monitoring of nitrous oxide concentration is completed under sealed conditions. With the assistance of the refrigeration unit, emergency response shutdown in the production process is completed. When leakage occurs, that is, after the gas detector detects the nitrous oxide concentration, the main pipeline transmission is quickly opened through the gas alarm control, that is, the solenoid valve and the explosion-proof axial flow fan are started, which accelerates the nitrous oxide generated by ammonium nitrate into the condenser, preventing the sealed chamber from becoming unsealed and minimizing the amount of nitrous oxide overflow.

[0017] When the first temperature instrument detects that the temperature inside the reactor is too high, the heat conduction method relied upon by the cooling water pipes is not effective. Therefore, an upper spray method is adopted to achieve emergency cooling and meltdown, further increasing the degree of automatic control over the reaction temperature. Attached Figure Description

[0018] Figure 1 This is a diagram showing the overall architecture of the nitrous oxide safety production monitoring system.

[0019] In the diagram: 1. Safety water seal tank; 2. Reactor; 3. Condenser;

[0020] 401. Sealed chamber; 402. Gas detector; 403. Gas alarm controller; 404. Relay; 405. Explosion-proof audible and visual alarm light; 406. Solenoid valve; 407. Explosion-proof axial flow fan; 408. Mobile terminal;

[0021] 501. First temperature instrument; 502. Heating assembly; 503. Cooling water pipe; 504. Spray water pipe; 505. First circulating pump; 506. First check valve; 507. Condensate tank; 508. Second check valve; 509. Second circulating pump;

[0022] 6. Stirring blades; 7. Main shaft; 8. Second temperature gauge. Detailed Implementation

[0023] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0024] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0025] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented even without certain specific details. In some instances, methods, means, and elements well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0026] This utility model provides a nitrous oxide safety production monitoring system. The system includes a reaction unit and a production monitoring module. The reaction unit includes a safety water seal tank 1, a reactor 2, and a condenser 3 connected in sequence. The production monitoring module includes a monitoring unit for isolating the reactor 2 and monitoring the temperature, and a refrigeration unit for circulating cooling water on the reactor 2 and the condenser 3.

[0027] This embodiment addresses the issue of the thermal decomposition of ammonium nitrate in reactor 2 in the prior art by using a monitoring unit for isolation and sealing, and completing real-time monitoring of nitrous oxide concentration under sealed conditions. Furthermore, it utilizes the assistance of a refrigeration unit to achieve emergency reaction shutdown during the production process.

[0028] Example 1: The monitoring unit includes a sealed chamber 401, which is located outside the reactor 2 and isolates the reactor 2. Multiple gas detectors 402 are installed in the monitoring pipes extending from the sealed chamber 401. All gas detectors 402 are connected to a gas alarm controller 403 via RS485 data transmission. The gas alarm controller 403 is set with a response alarm concentration value. The gas alarm controller 403 is electrically connected to a relay 404 and an explosion-proof audible and visual alarm light 405. The gas alarm controller 403 is linked to the relay 404 to control a solenoid valve 406 and an explosion-proof axial flow fan 407. The solenoid valve 406 and the explosion-proof axial flow fan 407 are respectively installed on the main and branch pipes of the reactor 2 and the condenser 3.

[0029] It should be noted that in this embodiment, the gas alarm controller 403 is a central device with multi-port connection. Therefore, this embodiment can use the ERUN-PG36E gas alarm controller made of ST83C52 microcontroller. As for the gas detector 402 that directly monitors the concentration, a point gas detector or wireless gas detector can be selected. Solenoid valve 406 and explosion-proof axial flow fan 407 are installed on the main pipeline between reactor 2 and condenser 3. When a leak occurs, that is, after the gas detector 402 detects the concentration of nitrous oxide, the gas alarm control 403 quickly opens the main pipeline, that is, the solenoid valve 406 and the explosion-proof axial flow fan 407 are started, which accelerates the nitrous oxide produced by ammonium nitrate into the condenser 3. This operation can also prevent the sealed chamber 401 from becoming unsealed and minimize the amount of nitrous oxide overflow.

[0030] Furthermore, during the normal reaction process, the solenoid valve 406 and the explosion-proof axial flow fan 407 control the closure of the main pipeline, which can further ensure the complete generation of the reaction.

[0031] The gas alarm controller 403 can be set to respond to alarm concentration values. The gas alarm controller 403 adopts a bus connection method to connect multiple gas detectors 402 in parallel. The gas alarm controller 403 is wirelessly connected to a mobile terminal 408.

[0032] In a safety production monitoring system, the alarm concentration value should ideally be set to 0. If nitrous oxide is detected in the sealed chamber 401, it indicates a leak in reactor 2 or related pipelines. However, in unmanned industrial processing, the alarm concentration value should be set to a corresponding value. Even if a small leak occurs, it can be quickly discharged through the main pipelines of reactor 2 and condenser 3, significantly reducing the amount of nitrous oxide spillage and preventing waste of ammonium nitrate raw materials.

[0033] Example 2: The refrigeration unit includes a first temperature instrument 501, a heating component 502, a cooling water pipe 503, and a spray water pipe 504. The first temperature instrument 501 is disposed on the end face of the reactor 2 shell. The temperature of the reactor 2 is controlled by the heating component 502 disposed thereon. The cooling water pipe 503 is connected to the spray water pipe 504 through a connecting pipe, and a first circulation pump 505 and a first one-way valve 506 are disposed on the connecting pipe.

[0034] It should be noted that when the first temperature instrument 501 detects that the temperature inside the reactor 2 is too high, the heat conduction method relied upon by the cooling water pipe 503 is not effective. Therefore, in addition to traditional cooling, this embodiment adopts an upper spray method to achieve emergency cooling and meltdown, further increasing the degree of self-control over the reaction temperature.

[0035] In order to achieve autonomous circulation of the cooling water system and improve the utilization rate of cooling water, the cooling water pipe 503 is connected to the condensate tank 507 containing coolant, and the coolant enters the cooling water pipe 503 by the second one-way valve 508. The condensate tank 507 is controlled by the second circulation pump 509 to control the coolant entering and exiting the condenser 3.

[0036] In order to improve the efficiency of thermal decomposition of ammonium nitrate, a stirring blade 6 is installed in the reactor 2. The stirring blade 6 is arranged in an array on the main shaft 7, and the main shaft 7 is rotatably connected to the reactor 2.

[0037] A second temperature gauge 8 is installed on the end face of the condenser 3 housing.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A nitrous oxide safety production monitoring system, characterized in that: The system includes a reaction unit and a production monitoring module. The reaction unit includes a safety water seal tank (1), a reactor (2), and a condenser (3) connected in sequence. The production monitoring module includes a monitoring unit for isolating the reactor (2) and monitoring the temperature, and a refrigeration unit for circulating cooling water on the reactor (2) and the condenser (3).

2. The nitrous oxide safety production monitoring system according to claim 1, characterized in that: The monitoring unit includes a sealed chamber (401), which is located outside the reactor (2) and isolates the reactor (2). Multiple gas detectors (402) are installed in the monitoring pipe extending from the sealed chamber (401). All of the gas detectors (402) are connected to a gas alarm controller (403) via RS485 data transmission. The gas alarm controller (403) is set with a response alarm concentration value. The gas alarm controller (403) is electrically connected to a relay (404) and an explosion-proof audible and visual alarm light (405). The gas alarm controller (403) is linked to the relay (404) to control a solenoid valve (406) and an explosion-proof axial flow fan (407). The solenoid valve (406) and the explosion-proof axial flow fan (407) are respectively installed on the main and branch pipes of the reactor (2) and the condenser (3).

3. The nitrous oxide safety production monitoring system according to claim 2, characterized in that: The gas alarm controller (403) can be set to respond to alarm concentration values. The gas alarm controller (403) adopts a bus connection method to connect multiple gas detectors (402) in parallel. The gas alarm controller (403) is wirelessly connected to a mobile terminal (408).

4. The nitrous oxide safety production monitoring system according to claim 1, characterized in that: The refrigeration unit includes a first temperature instrument (501), a heating component (502), a cooling water pipe (503), and a spray water pipe (504). The first temperature instrument (501) is located on the end face of the reactor (2) shell. The temperature of the reactor (2) is controlled by the heating component (502) located thereon. The cooling water pipe (503) is connected to the spray water pipe (504) through a connecting pipe. A first circulating pump (505) and a first one-way valve (506) are provided on the connecting pipe.

5. The nitrous oxide safety production monitoring system according to claim 4, characterized in that: The cooling water pipe (503) is connected to a condensate tank (507) containing coolant, and the coolant enters the cooling water pipe (503) by a second one-way valve (508). The condensate tank (507) is controlled by a second circulation pump (509) to allow the coolant to enter and exit the condenser (3).

6. The nitrous oxide safety production monitoring system according to claim 1, characterized in that: The reactor (2) is equipped with stirring blades (6), which are arranged in an array on the main shaft (7), and the main shaft (7) is rotatably connected to the reactor (2).

7. The nitrous oxide safety production monitoring system according to claim 2, characterized in that: The condenser (3) has a second temperature instrument (8) installed on the end face of its outer shell.

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