Comprehensive treatment control system for waste gas under complex working conditions of whole pharmaceutical factory

Abstract

The invention discloses a whole pharmaceutical factory complex working condition waste gas comprehensive treatment control system, which relates to the technical field of pharmaceutical industry waste gas treatment, and comprises a low-concentration waste gas treatment system, a high-concentration waste gas treatment system, a fuel pretreatment and conveying system, a heat recovery system and a control system of each flow. Waste gas of the low-concentration waste gas treatment system and waste gas of the high-concentration waste gas treatment system come from a plurality of workshops, and the low-concentration waste gas treatment system conducts concentration treatment to obtain high-concentration waste gas which is then conveyed to the high-concentration waste gas treatment system to be treated. The fuel pretreatment and conveying system is responsible for providing fuel meeting the requirement for the high-concentration waste gas treatment system, waste gas is treated by the high-concentration waste gas treatment system, then exhaust gas is subjected to heat recovery through the heat recovery system, and the exhaust gas is used for preheating sewage of the sewage treatment system, analyzing a rotating wheel and the like. Through cooperation of all processing systems, stable, safe, continuous and efficient operation of the system is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment in the pharmaceutical industry, and in particular to a comprehensive waste gas treatment control system for a pharmaceutical factory under complex working conditions. Background Art

[0002] The pharmaceutical industry is an important part of my country's national economy. The rapid development of the pharmaceutical industry plays a very important role in improving people's quality of life, promoting economic development and social progress. Since drugs go through fermentation, synthesis, regeneration, concentration, extraction, refining, drying and packaging during the production process, a large amount of organic waste gas will inevitably be generated. These waste gases not only have huge differences in organic matter concentration, but also have complex compositions. In addition to conventional organic matter, they also contain dust, acid, alkali, sulfur, chlorine, silicon and other components, which increases the difficulty of choosing treatment processes. In addition to organic waste gas, the pharmaceutical industry also produces various types of organic waste such as wastewater and organic waste liquid. Therefore, designing and implementing the classified collection and targeted treatment process of complex waste gas, and realizing the coordinated treatment of multiple organic waste gases is one of the key issues that the pharmaceutical industry urgently needs to solve.

[0003] For the treatment of industrial organic waste gas, the most widely used technologies are adsorption concentration and incineration. Through adsorption concentration technology, large air volume and low concentration organic waste gas can be treated, but this technology needs to consume a lot of heat during the adsorbent regeneration process to ensure the regeneration temperature requirement. Incineration technology is mainly aimed at the final disposal of high-concentration organic waste gas. This process also requires a lot of energy consumption, and the exhaust temperature is high, which easily causes energy loss and reduced energy utilization. Therefore, how to achieve the coordinated treatment of adsorption concentration technology and incineration technology, develop processes with strong raw material adaptability that can meet the treatment of organic waste gas of different concentrations and components, save system equipment energy consumption, maximize energy utilization, and improve energy utilization, is another major problem to be solved.

[0004] In addition, the sources of waste gas are widely distributed, the emissions are irregular, and organized and unorganized emissions coexist, which greatly increases the difficulty of waste gas treatment. Therefore, how to control the exhaust pressure of each exhaust pipe, adjust the air volume of each workshop and each point source, ensure that the waste gas from different pollution point sources can be stably transported, and make the frequency of each conveying fan flexibly controlled according to the amount of waste gas from each point source, saving the energy consumption of the fan operation; how to ensure the safe transportation and treatment of high-concentration waste gas, and realize automated response to various situations; for diversified process designs, how to ensure the coordination and cooperation of each processing subsystem by regulating the relevant valves, instruments, etc., is also the third problem to be solved by this patent.

[0005] It can be seen that developing a comprehensive exhaust gas treatment system that can handle complex working conditions and an exhaust gas treatment control system that can ensure the long-term, safe, stable, energy-saving and efficient operation of the treatment system is an issue that urgently needs to be solved. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a comprehensive waste gas treatment control system for a pharmaceutical factory under complex working conditions, which solves the problems raised in the above-mentioned background technology.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a comprehensive waste gas treatment control system for the whole pharmaceutical factory under complex working conditions, including a low-concentration waste gas treatment system, a high-concentration waste gas treatment system, a fuel pretreatment and transportation system, a heat recovery system and a control system; the waste gas of the low-concentration waste gas treatment system and the high-concentration waste gas treatment system comes from multiple workshops, wherein the low-concentration waste gas treatment system concentrates the waste gas to obtain high-concentration waste gas and then transports it to the high-concentration waste gas treatment system for treatment, the fuel pretreatment and transportation system is responsible for providing the high-concentration waste gas treatment system with fuel that meets the requirements, and the exhaust gas after the waste gas is treated by the high-concentration waste gas treatment system is subjected to heat recovery by the heat recovery system, and is used for preheating the wastewater in the wastewater treatment system and analyzing the runner, and the coordinated cooperation of each treatment system ensures the stable, safe, continuous and efficient operation of the system;

[0008] The low-concentration waste gas and high-concentration waste gas come from multiple workshops. The waste gas concentration and composition of each workshop are different, and the working conditions are complex. Through the regulation of the comprehensive waste gas treatment control system, the waste gas from each workshop can be classified and collected, and safely and stably transported to each treatment system. The use of diversified process designs can realize the coordinated treatment of waste gas under various complex working conditions; the fuel pretreatment and transportation system involves fuels such as biogas and organic waste liquid. The use of waste fuel and the design of the heat recovery system can reduce the operating cost of the system, improve energy utilization, and reduce energy consumption. The control system realizes safe, stable and automatic operation of the entire system through the control interlocking of the temperature, pressure, concentration and other monitoring instruments and valves, fans, etc. of the entire system.

[0009] Optionally, the low-concentration treatment system comprises two exhaust gas branches, 1# and 2#. The exhaust gas from each branch is collected according to the composition. For example, the exhaust gas containing acid, alkali, dust and other gases (1# exhaust gas) is collected separately and enters the pretreatment system, and then connected to the 1# fan for transportation. The 2# exhaust gas is transported by the 2# fan and is collected with the 1# exhaust gas. The pretreatment system includes but is not limited to one or more of the technologies such as acid spraying, alkali spraying, oxidation spraying, water spraying, dust removal, temperature control, etc., depending on the composition of the exhaust gas;

[0010] Each exhaust gas branch is provided with a pressure transmitter P, a pneumatic regulating valve and a fan. The pressure transmitter P is interlocked with the fan and the valve. The control system stabilizes the wind pressure by adjusting the valves of each branch to ensure that the pressure of each branch is lower than the pressure of the main pipe, thereby ensuring the stability of the exhaust gas transportation of each branch and preventing problems such as cross-flow, air holding and air return from occurring during the exhaust gas transportation of each branch, thereby affecting the normal production of the workshop. The fan and the pressure transmitter are also designed to be interlocked on the main pipe transportation pipeline to ensure the stable transportation of the exhaust gas from the main pipe.

[0011] Optionally, the spray system includes a spray tower and a circulation pump. The spray tower is provided with a liquid level meter LI interlocked with the valve and the circulation pump, and a pH meter interlocked with the valve. According to the indications of the liquid level meter and the pH meter, automatic water replenishment, alkali replenishment, acid replenishment, etc. are achieved while protecting the stable operation of the water pump. When necessary, the water pump is automatically started and stopped and the valve is opened and closed to prevent the liquid level from being too high, resulting in serious entrainment of gas mist at the top of the tower, or the liquid level from being too low, resulting in damage to the circulation pump, thereby ensuring the safe and stable operation of the system;

[0012] The spray tower is provided with a demisting layer and a packing layer. Necessary differential pressure transmitters P are provided at both ends of the demisting layer and the packing layer. The control system alarm indicates the blockage of the packing layer and the demisting layer of the spray tower. If the pressure difference is greater than a certain value (set according to the debugging situation), the control system automatically starts the cleaning function. High-pressure nozzles are arranged on the top of the demisting layer and the packing layer. If necessary, they are cleaned until the detection data of the differential pressure transmitter returns to the normal range, thereby ensuring the stable operation of the system.

[0013] Optionally, the subsequent treatment equipment for the aggregated exhaust gas includes a pretreatment, a rotary concentration treatment equipment, a fan, and an exhaust chimney connected in sequence; the exhaust gas after the rotary treatment enters the exhaust chimney under the transportation of the 3# fan, and the high-concentration analysis gas enters the high-concentration exhaust gas treatment system under the transportation of the 4# fan; the pretreatment equipment includes but is not limited to temperature control, dust removal, etc., to ensure that the intake air meets the intake conditions of the rotary equipment, wherein the flow rate of the medium used for temperature control is interlocked with the temperature transmitter T, and the control system automatically adjusts the flow rate of the medium according to the opening of the pneumatic valve controlled by the temperature transmitter, and the pneumatic valve is designed to be connected in series with the manual valve. If the temperature continues to be abnormal and an alarm is sounded, the manual valve is manually adjusted to ensure that the temperature is normal; the inlet and outlet of the dust removal equipment are provided with a pressure differential transmitter P, which is used to alarm and indicate the blockage of the dust collector. The dust collector has a dust cleaning function and is cleaned when necessary until the differential transmitter detection data returns to the normal range, thereby ensuring efficient operation of the system.

[0014] Optionally, the high-concentration treatment system includes five exhaust gas branches from 3# to 7# and a rotary analysis gas branch. The exhaust gas from each branch is collected and classified according to its composition. Exhaust gas 3# is organic matter containing acid and alkaline gases, exhaust gas 4# is organic matter containing silicon, exhaust gas 5# is organic waste gas containing chlorine, and exhaust gas 6# is sulfur-containing odorous gas from a sewage station. The above branch transmission pipelines are all equipped with a pressure transmitter P, a pneumatic regulating valve and a fan. The pressure transmitter P is interlocked with the fan and the valve to ensure the stability of the pressure of each branch by adjusting the wind pressure, and to match the air volume of the corresponding pipeline by adjusting the valve to ensure stable air delivery without affecting the work of the workshop. In addition, a temperature transmitter is designed on the high-concentration transmission pipeline to monitor the temperature changes of the exhaust gas during transportation to prevent the risk of explosion caused by excessive temperature. If the temperature is too high, the system automatically takes cooling measures.

[0015] Optionally, each high-concentration branch is provided with a combustible gas concentration detector LEL, which is automatically interlocked with a dilution valve. The valve opening is regulated according to the exhaust gas concentration. The dilution gas source is 2# low-concentration exhaust gas, which ensures that the exhaust gas concentration is safe and controllable, maximizes the safety of the high-concentration treatment system, and does not increase the system's processing gas volume. The LEL meter is redundantly designed, and multiple meters are interlocked to ensure the accuracy of the detection data. The principle of the LEL meter can be one or more of infrared, FID, FTA, PID and other detection principles;

[0016] The system includes a pretreatment system, a fan, a fire barrier, and an incinerator connected in sequence; the waste gas pretreatment system is determined according to the composition of the waste gas, such as 3# acid and alkali waste gas, its pretreatment equipment is a spraying equipment, and the spraying equipment includes but is not limited to one or more of acid spraying, alkali spraying, oxidation spraying, and water spraying; 4# silicon-containing organic matter and 5# chlorine-containing organic matter, their pretreatment equipment is an adsorption equipment, and the adsorbent used in the adsorption equipment includes but is not limited to resin and activated carbon; 6# is sulfur-containing organic matter in the sewage station, and its pretreatment system It is a desulfurization system; after the exhaust gas from each branch is processed by the pretreatment system, it is collected under the conveyance of the fan and incinerated in the incinerator. A flame arrester is provided at the front end of the incinerator to provide fire protection for pipelines and equipment, effectively prevent dangerous phenomena such as open flame backfire and leakage, and protect the stable operation of the production workshop. Pressure differential transmitters P are provided at both ends of the flame arrester to alarm and indicate the blockage of the flame arrester. The flame arrester is provided with a nozzle, which is cleaned when necessary until the detection data of the differential transmitter returns to the normal range, thereby ensuring the efficient operation of the system.

[0017] Optionally, the fuel pretreatment and transportation system includes biogas generated by the anaerobic process of the sewage station and organic waste liquid from the pharmaceutical factory. The biogas system includes a biogas storage cabinet, a spray system, a desulfurization system, a boosting system, a biogas torch, and a biogas generator set connected in sequence; the biogas storage cabinet is provided with a pressure transmitter P interlocked with a bypass valve to deal with the storage safety when the pressure of the biogas storage cabinet is high; the boosting system is a booster fan, which is provided with a pressure switch P interlocked with the booster fan to ensure that the biogas pressure meets the fuel requirements and protects the storage safety of the biogas storage cabinet; the biogas torch and the biogas generator set branch are both provided with a pneumatic regulating valve, which is connected to the pressure switch and the gas outlet end hydrogen sulfide concentration detector H 2 S interlocking, the biogas torch and biogas generator set are used to deal with conditions such as excess biogas and composition not meeting fuel requirements, and excess biogas is preferentially introduced into the biogas generator set; the organic waste liquid system comprises a filter and a booster pump connected in sequence, and is provided with a pressure transmitter P interlocking with a valve to regulate the flow of waste liquid, and excess waste liquid is transported back to the waste liquid storage tank via a bypass;

[0018] The desulfurization system adopts A / B tank dry desulfurization method. Hydrogen sulfide concentration detectors are installed on the transmission pipelines before and after the desulfurization equipment. The frequency of the fan is adjusted according to the detection data of the instrument before the equipment, so as to increase the frequency at low concentration and reduce the frequency at high concentration, thereby controlling the residence time of the exhaust gas in the desulfurization equipment, ensuring that the hydrogen sulfide concentration detected by the instrument after the equipment meets the standard while extending the service life of the desulfurizer in the equipment; if the concentration of hydrogen sulfide detected by the instrument after the equipment continues to increase, it indicates that the desulfurizer needs to be oxidized and regenerated, and the system automatically controls the valve switch to start the desulfurization tank B, and the desulfurization tank A starts the regeneration program; this cycle is repeated to ensure the stable operation of the desulfurization system.

[0019] Optionally, the heat recovery system refers to the heat recovery of exhaust gas after treatment by the high-concentration treatment system, specifically refers to the heat recovery of the heat exchange process between the high-temperature gas and the rotor analysis intake air in route one and the heat recovery of the heat exchange process between the high-temperature gas and the sewage in the sewage pool in route two.

[0020] Optionally, the rotor analysis air intake of the route 1 is the rotor cooling exhaust, and a temperature transmitter T is provided on the analysis air intake pipeline after heat exchange in the 1# heat exchanger, which is interlocked with the valve on the high-temperature air pipeline, and the temperature of the analysis air intake is controlled by regulating the flow rate of the high-temperature air to meet the analysis air intake requirements;

[0021] Route 2 uses indirect heat exchange between high-temperature gas and sewage, including 2# heat exchanger, 3# heat exchanger and hot water storage tank; the 2# heat exchanger is used for heat exchange between high-temperature gas and circulating water, the hot water storage tank is used for temporary storage of circulating water, and the 3# heat exchanger is used for heat exchange between sewage and heated circulating water. Temperature transmitters T and valve interlocks are installed on the gas and sewage delivery pipelines to ensure maximum heat recovery. The exhaust gas after heat recovery is discharged through the exhaust pipe under the transportation of 11# fan.

[0022] Optionally, the control system of each process may be selected from but not limited to a DCS control system or a PLC control system. The control system used may be designed with redundancy, including but not limited to controller redundancy, I / O card redundancy, power supply redundancy, etc. A simple interlocking control logic may be used to predict fault risks in advance, and the main parameters of system operation may be collected and monitored, so that intelligent and automated handling and response may be achieved for abnormal situations.

[0023] The present invention provides a comprehensive waste gas treatment control system for a pharmaceutical factory under complex working conditions, which has the following beneficial effects:

[0024] The pharmaceutical factory's comprehensive waste gas treatment control system for complex working conditions can realize the classified collection of waste gas from each workshop and safely and stably transport it to various treatment systems through the regulation of the comprehensive waste gas treatment control system. The use of diversified process designs can realize the coordinated treatment of waste gas from various complex working conditions; the use of biogas and organic waste liquid and the heat recovery of high-temperature flue gas from the incinerator can reduce the operating cost of the system, improve energy utilization, and reduce energy consumption; the whole system is designed with temperature, pressure, concentration and other monitoring instruments, and the whole system is safe, stable and automatic through the control interlocking of instruments, valves, fans, etc.

[0025] The pharmaceutical factory's comprehensive waste gas treatment and control system for complex operating conditions throughout the plant can achieve comprehensive treatment of waste gases of different properties (air volume, organic matter concentration, composition such as dust, acid, alkali, sulfur, chlorine, silicon and other components), and collect and classify the waste gases according to their properties, and aggregate and transport point sources with the same waste gas properties. It adopts personalized pretreatment system design and diversified process design for different waste gas components, and the various treatment systems cooperate with each other to achieve coordinated treatment of waste gases under various complex operating conditions and ensure that the waste gases from the entire plant meet emission standards.

[0026] The pharmaceutical factory has a comprehensive waste gas treatment control system with low operating costs and high energy utilization rate.

[0027] (1) Anaerobic biogas from sewage stations and organic waste liquid from pharmaceutical factories can be used as fuel for incinerators. The use of waste fuel or cost-free fuel avoids the use of conventional fuels such as natural gas during the start-up and operation of the incinerator, solving the energy consumption problem of the incinerator. In addition, excess biogas can be used for power generation in biogas power generation units, further avoiding energy waste;

[0028] (2) Part of the high-temperature flue gas discharged by the incinerator provides heat to the desorption gas of the rotor through heat exchange, so that the rotor can be regenerated, solving the energy consumption problem in the rotor regeneration process;

[0029] (3) The exhaust gas from the incinerator generates hot water through heat exchange, and the generated hot water is used to exchange heat with the sewage to be treated, so that the sewage reaches the required temperature for treatment, thereby reducing the energy consumption of the sewage treatment system;

[0030] (4) Through the interlocking control system of the fan, valves, instruments, etc., the air volume and pressure can be flexibly controlled, and the fan frequency can be accurately adjusted, thus reducing the fan's power consumption;

[0031] The above designs all reduce operating costs, improve energy utilization and reduce energy consumption.

[0032] The pharmaceutical factory's comprehensive waste gas treatment control system for complex working conditions is safe, stable and highly automated:

[0033] (1) Pressure instruments are designed on the pipelines and interlocked with valves, fans and other controls to maintain wind pressure balance through mutual automatic regulation and ensure smooth exhaust gas discharge from the workshop;

[0034] (2) A combustible gas detector is designed on the high-concentration branch pipe and is interlocked with the dilution valve. The dilution valve opening is automatically adjusted through concentration monitoring to strictly control the intake concentration and predict and avoid possible over-concentration hazards. The LEL meter is a multi-meter and multi-principle redundant design to ensure the accuracy of the detection data;

[0035] (3) Establish fire prevention and explosion relief measures, separate the environmental protection system from the workshop, and ensure that the safe production of the workshop is not affected; the spray tower demisting layer, flame arrester, dust collector, rotor and other equipment are equipped with online differential pressure transmitters and cleaning devices to ensure that the equipment can be cleaned online to restore the processing capacity, and the desulfurization system is designed with an automatic oxidation regeneration program. The above measures can ensure that the normal operation of the exhaust gas treatment system is not affected;

[0036] (4) The reliability design of the control system can ensure the safe and stable operation of the system. The multiple redundant designs of the controller, I / O cards and power supply, and the UPS auxiliary design can ensure the long-term safe and stable control of the system. The simple interlocking control logic is used to predict the danger of failure in advance, and the main parameters of the system operation are collected and monitored. Intelligent and automatic handling and response can be achieved for abnormal situations. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the pipeline connection in the invention. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0039] See also Figure 1 The present invention provides a technical solution: a comprehensive waste gas treatment control system for the whole pharmaceutical factory under complex working conditions, including a low-concentration waste gas treatment system, a high-concentration waste gas treatment system, a fuel pretreatment and transportation system, a heat recovery system and control systems for the above processes, and through the coordinated cooperation of various treatment systems, the stable, safe, continuous and efficient operation of the system is ensured;

[0040] The specific process is as follows:

[0041] The 1# and 2# exhaust gases are low-concentration exhaust gases. Since the 1# exhaust gas contains not only organic components but also acids, alkalis and other gases, this part of the exhaust gas is collected and introduced into the pretreatment system for treatment. The pretreatment system is composed of acid spray, alkali spray and water spray. The spray system is connected to the 1# fan. For the 2# exhaust gas containing only organic matter, it is directly collected with the 1# exhaust gas under the transportation of the 2# fan. In order to adjust the air volume and air pressure of the two exhaust gases and ensure the stability of the pressure of each branch, the 1# and 2# exhaust gas transportation pipelines are equipped with pressure transmitters P and pneumatic regulating valves. The pressure transmitter P is interlocked with the fan and valve. By adjusting the valves of each branch, the air pressure is stabilized to ensure that the branch pressure is lower than the pressure of the summary main pipe, so as to ensure the stability of the summary transportation of the exhaust gases of each branch, and prevent the problems of cross-flow, holding air and return air in the process of exhaust gas transportation of each branch, which will affect the normal production of the workshop; the fan and the pressure transmitter are also designed to be interlocked on the main pipe transportation pipeline to ensure the exhaust gas of the main pipe. Stable transportation; the low-concentration exhaust gas after aggregation is pre-treated in turn by temperature-controlled dehumidification and dust removal equipment to ensure that the intake air meets the intake conditions of the rotor equipment. The exhaust gas then enters the rotor equipment for concentration treatment, and the treated qualified gas enters the exhaust pipe under the transportation of the 3# fan; the temperature control equipment is equipped with a temperature transmitter T at the air outlet, and the flow rate of the medium used for temperature control is interlocked with the temperature transmitter T. The control system automatically adjusts the flow rate of the medium according to the opening of the pneumatic valve controlled by the temperature transmitter. The pneumatic valve is designed to be connected in series with the manual valve. If the temperature continues to be abnormal and the alarm is sounded, the manual valve is manually adjusted to ensure normal temperature; the inlet and outlet of the dust removal equipment are equipped with a pressure differential transmitter P, which is used to alarm and indicate the blockage of the dust collector. The dust collector has a dust cleaning function and is cleaned when necessary until the differential transmitter detection data returns to the normal range, thereby ensuring the efficient operation of the system; the high-concentration gas after the rotor concentration and analysis enters the high-concentration exhaust gas treatment system under the transportation of the 4# fan;

[0042] In the spray system, the spray tower is equipped with a liquid level meter LI, which is interlocked with the valve and the circulation pump, and the pH meter is interlocked with the valve. According to the readings of the liquid level meter and the pH meter, automatic water replenishment, alkali replenishment, acid replenishment, etc. are achieved while protecting the stable operation of the water pump. When necessary, the water pump is automatically started and stopped and the valve is opened and closed to ensure the safe and stable operation of the system. Necessary differential pressure transmitters P are provided at both ends of the spray tower demisting layer and the packing layer. The control system alarm indicates the blockage of the spray tower packing layer and demisting layer. If the pressure difference is greater than 400Pa (settable), the control system automatically starts the cleaning function. High-pressure nozzles are arranged on the top of the demisting layer and the packing layer. If necessary, they are cleaned until the detection data of the differential pressure transmitter returns to the normal range, thereby ensuring the stable operation of the system;

[0043] The 3#~6# four-way exhaust gas and the wheel analysis gas are all high-concentration exhaust gases. The exhaust gases from each branch are collected according to the source and composition of the exhaust gas. For the 3# exhaust gas, in addition to organic matter, it also contains acid and alkali exhaust gases. Therefore, this part of the exhaust gas is collected separately according to the workshop and pre-treated by the spray system before being transported by the fans of each branch. For the 4# silicon-containing organic matter, if it is passed into the incinerator, silicon dioxide powder will be produced, causing equipment blockage, and the presence of 5# chlorine-containing organic matter will lead to the production of dioxins. Therefore, the 4# exhaust gas is pre-treated by activated carbon adsorption, and the 5# exhaust gas is pre-treated by resin adsorption to ensure that the silicon-containing and chlorine-containing organic matter in the treated exhaust gas is low, reducing the possibility of silicon dioxide and dioxin production from the source; the 6# exhaust gas is The sulfur-containing waste gas from the sewage station is first pre-treated by the desulfurization equipment and then merged into the above waste gas during transportation. The rotor analysis gas is also merged into the above waste gas during transportation. The above five waste gas transportation pipelines are equipped with pressure transmitters P and pneumatic regulating valves. The control system stabilizes the wind pressure by adjusting the valves of each branch to ensure that the pressure of each branch is lower than the pressure of the main pipe, thereby ensuring the stability of the waste gas transportation of each branch and preventing problems such as cross-flow, holding and back air from occurring during the transportation of each branch waste gas, which may affect the normal production of the workshop. In addition, each high-concentration waste gas branch is equipped with a combustible gas concentration detector LEL. The instrument is designed with dual redundancy and the detection principle is FTA and infrared principle to ensure the reliability of the data. The instrument and the dilution valve Automatic interlocking, regulating the valve opening according to the exhaust gas concentration, the release source is 2# low-concentration exhaust gas, which ensures that the exhaust gas concentration is safe and controllable, maximizes the safety of the high-concentration treatment system, and does not increase the system's processing gas volume; the high-concentration transmission pipeline is equipped with a temperature transmitter to monitor the temperature change of the exhaust gas during transportation to prevent the risk of explosion caused by excessive temperature. If the temperature is too high, the system automatically takes cooling measures; the aggregated high-concentration exhaust gas enters the incinerator under the transportation of the 9# fan for oxidation and decomposition. The fan and pressure transmitter are also designed to be interlocked on the aggregation main pipe to ensure the stable transportation of the main pipe exhaust gas; a flame arrester is installed in front of the fan to provide fire protection for pipelines and equipment, effectively preventing open flame backfire, leakage, etc. Dangerous phenomenon, to protect the stable operation of the production workshop, pressure differential transmitters P are installed at both ends of the flame arrester to alarm and indicate the blockage of the flame arrester. The flame arrester is equipped with a nozzle, which is cleaned when necessary until the differential transmitter detection data returns to the normal range, thereby ensuring the efficient operation of the system; the high-temperature gas after incineration in the incinerator enters the 1# heat exchanger all the way, and exchanges heat with the wheel cooling exhaust gas. The wheel cooling exhaust gas is heated and enters the wheel analysis area. The analysis air intake pipeline is equipped with a temperature transmitter T, which is interlocked with the valve on the high-temperature gas pipeline. The temperature of the analysis air intake is controlled by adjusting the flow rate of the high-temperature gas to meet the analysis air intake requirements; the remaining high-temperature exhaust gas enters the 2# heat exchanger, exchanges heat with the circulating water, and is discharged through the exhaust pipe under the transportation of the 10# fan;The hot water after heat exchange in the 2# heat exchanger enters the storage tank, and then exchanges heat with the preheated sewage in the sewage pool through the 3# heat exchanger. The gas and sewage transmission pipelines are equipped with temperature transmitters T and valve interlocks to ensure maximum heat recovery. The cooled circulating water returns to the hot water storage tank to cool the high-temperature exhaust gas.

[0044] The fuel pretreatment and delivery system is used to provide fuel for the incinerator, which includes biogas generated by the anaerobic process of the sewage station and organic waste liquid from the pharmaceutical factory. The biogas generated by the anaerobic process is transported to the biogas storage tank. A pneumatic regulating valve is provided on the delivery pipeline. The biogas storage tank is provided with a pressure transmitter P which is interlocked with the bypass valve. By adjusting the two valves, the pressure of the biogas storage tank is ensured to be within a safe range. Subsequently, the biogas is processed by two sets of equipment, spraying and desulfurization. The delivery pipelines before and after the desulfurization equipment are equipped with hydrogen sulfide concentration detectors. The frequency of the fan is adjusted according to the detection data of the instrument before the equipment, so as to increase the frequency at low concentration and reduce the frequency at high concentration, thereby controlling the residence time of the exhaust gas in the desulfurization equipment, ensuring that the hydrogen sulfide concentration detected by the instrument after the equipment meets the standard, and extending the service life of the desulfurizer in the equipment. If the instrument after the equipment If the concentration of hydrogen sulfide is detected to be continuously increasing, it indicates that the desulfurizer needs to be oxidized and regenerated. The system automatically controls the valve switch to start the desulfurization tank B, and the desulfurization tank A starts the regeneration program; this cycle is repeated to ensure the stable operation of the desulfurization system, thereby ensuring that the properties of the treated biogas meet the fuel standards of the incinerator; in order to ensure that the biogas pressure meets the fuel requirements and protect the storage safety of the biogas storage cabinet, a 5# fan is installed after the desulfurization equipment, and a pressure switch P is interlocked with the 5# fan. When the pressure is too high, the pneumatic regulating valve on the biogas generator set or the biogas flare branch is opened, and the excess biogas is discharged through the biogas generator set or the flare. The excess biogas is first introduced into the biogas generator set. When the pressure is too low, the 5# fan is closed to protect the biogas storage cabinet. In addition, if the hydrogen sulfide concentration detector H after the desulfurization equipment 2 When the S detection concentration does not meet the standard, the pneumatic regulating valve on the biogas generator set or the biogas flare branch is also opened to deal with the working condition that the biogas composition does not meet the fuel requirements; another fuel is the organic waste liquid in the plant area, which is stored in a storage tank and then transported through a filter and a booster pump into the incinerator combustion system. A pressure transmitter P is provided on the transportation pipeline and interlocked with a valve to regulate the flow of the waste liquid. For the excess waste liquid, it is transported back to the waste liquid storage tank through a bypass;

[0045] The above low-concentration exhaust gas treatment system, high-concentration exhaust gas treatment system, fuel pretreatment and transportation system and heat recovery system cooperate with each other to ensure that the exhaust gas meets the emission standards after treatment. The premise of ensuring the stable operation of each system is the design of the control system; the whole treatment process adopts the DCS control system, through the controller redundancy design, I / O card redundancy design, power supply redundancy design, etc. to achieve long-term safe and stable control of the system; adopt simple interlocking control logic to realize early prediction of fault risks, collect and monitor the main parameters of system operation, and realize intelligent and automatic disposal and response for abnormal situations, thereby ensuring the safe and stable operation of the processing system automation.

[0046] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A comprehensive waste gas treatment control system for a pharmaceutical factory under complex working conditions, characterized in that: Including low-concentration exhaust gas treatment system, high-concentration exhaust gas treatment system, fuel pretreatment and transportation system, heat recovery system and control system; The exhaust gas of the low-concentration exhaust gas treatment system and the high-concentration exhaust gas treatment system are both from multiple workshops, wherein the low-concentration exhaust gas treatment system concentrates the high-concentration exhaust gas to be treated and then transported to the high-concentration exhaust gas treatment system, the fuel pretreatment and transportation system is responsible for providing the high-concentration exhaust gas treatment system with fuel that meets the requirements, and the exhaust gas after being treated by the high-concentration exhaust gas treatment system is heat recovered by the heat recovery system and used for preheating the sewage in the sewage treatment system and analyzing the runner; The low-concentration waste gas and high-concentration waste gas come from multiple workshops. Through the regulation of the comprehensive waste gas treatment control system, the waste gas from each workshop is classified and collected, and transported to each treatment system, so as to achieve coordinated treatment of waste gas under various complex working conditions.

2. The comprehensive treatment control system for waste gas in complex working conditions of the pharmaceutical factory according to claim 1 is characterized in that: The low-concentration treatment system comprises two exhaust gas branches, 1# and 2#. The exhaust gas from each branch is collected according to the composition. The exhaust gas containing acid, alkali and dust (1# exhaust gas) is collected separately and enters the pretreatment system, and then connected to the 1# fan for transportation. The 2# exhaust gas is transported by the 2# fan and collected with the 1# exhaust gas. The pretreatment system includes but is not limited to one or more of acid spraying, alkali spraying, oxidation spraying, water spraying, dust removal and temperature control technology; Each exhaust gas branch is provided with a pressure transmitter P, a pneumatic regulating valve and a fan. The pressure transmitter P is interlocked with the fan and the valve, and the control system adjusts the valves of each branch.

3. The low concentration treatment system according to claim 2, characterized in that: The spray system comprises a spray tower and a circulation pump, and the spray tower is provided with a liquid level meter LI interlocked with a valve and a circulation pump, and a pH meter interlocked with a valve; The spray tower is provided with a demisting layer and a packing layer. Both ends of the demisting layer and the packing layer are provided with a differential pressure transmitter P. The control system alarm indicates the blockage of the packing layer and the demisting layer of the spray tower. High-pressure nozzles are arranged on the top of the demisting layer and the packing layer for cleaning them until the detection data of the differential pressure transmitter returns to the normal range.

4. The low concentration treatment system according to claim 2, characterized in that: The subsequent treatment equipment for the aggregated waste gas includes a pre-treatment, a rotary concentration treatment equipment, a fan, and an exhaust pipe which are connected in sequence; the exhaust gas after the rotary treatment enters the exhaust pipe under the transportation of the 3# fan, and the high-concentration analysis gas enters the high-concentration waste gas treatment system under the transportation of the 4# fan; the pre-treatment equipment includes but is not limited to temperature control and dust removal to ensure that the intake air meets the intake conditions of the rotary equipment, wherein the flow rate of the medium used for temperature control is interlocked with the temperature transmitter T, and the control system automatically adjusts the flow rate of the medium according to the opening of the pneumatic valve controlled by the temperature transmitter, and the pneumatic valve is designed to be connected in series with the manual valve, and the inlet and outlet of the dust removal equipment are provided with a pressure differential transmitter P for alarming and indicating the blockage of the dust collector, and the dust collector has a cleaning function for cleaning it until the differential transmitter detection data returns to the normal range.

5. The comprehensive treatment control system for waste gas in complex working conditions of the pharmaceutical factory according to claim 1 is characterized in that: The high-concentration treatment system includes five exhaust gas branches from 3# to 7# and a rotor analytical gas branch. The exhaust gas from each branch is collected according to its composition. 3# waste gas is organic matter containing acid and alkaline gases; 4# waste gas contains silicon-containing organic matter; 5# waste gas is chlorine-containing organic waste gas; 6# waste gas is sulfur-containing and odorous gas from the sewage station; The above branch pipelines are equipped with pressure transmitters P, pneumatic regulating valves and fans. The pressure transmitter P is interlocked with the fans and valves to ensure the stability of pressure in each branch by adjusting the wind pressure, and to ensure the stable delivery of air volume by adjusting the valves to match the corresponding pipeline air volume. Temperature transmitters are designed on high-concentration transmission pipelines to monitor temperature changes of exhaust gas during transportation and prevent explosion risks caused by excessive temperature.

6. The high concentration treatment system according to claim 5, characterized in that: Each high-concentration branch is equipped with a combustible gas concentration detector LEL, which is automatically interlocked with the dilution valve. The valve opening is regulated according to the exhaust gas concentration. The dilution gas source is 2# low-concentration exhaust gas. The LEL instrument is redundantly designed, with multiple meters interlocked to ensure the accuracy of the detection data. The principle of the LEL instrument is one or more of infrared, FID, FTA, and PID detection principles; The system includes a pre-treatment system, a fan, a fire arrester, and an incinerator connected in sequence; The exhaust gas pretreatment system is determined according to the exhaust gas composition; 3# Acid and alkali waste gas, the pretreatment equipment is a spraying equipment, the spraying equipment includes but is not limited to one or more of acid spraying, alkali spraying, oxidation spraying, and water spraying; The pretreatment equipment for 4# silicon-containing organic matter and 5# chlorine-containing organic matter is an adsorption equipment, and the adsorbent used in the adsorption equipment includes but is not limited to resin and activated carbon; 6# is the sulfur-containing organic matter in the sewage station, and its pretreatment system is a desulfurization system; After being processed by the pretreatment system, the exhaust gas from each branch is collected under the conveyance of the fan and incinerated in the incinerator. A flame arrester is provided at the front end of the incinerator to provide fire protection for pipelines and equipment. Pressure differential transmitters P are provided at both ends of the flame arrester to alarm and indicate the blockage of the flame arrester. The flame arrester is provided with a nozzle for cleaning it.

7. The comprehensive treatment control system for waste gas in complex working conditions of the pharmaceutical factory according to claim 1 is characterized in that: The fuel pretreatment and transportation system includes biogas generated by the anaerobic process of the sewage station and organic waste liquid from the pharmaceutical factory. The biogas system includes a biogas storage cabinet, a spray system, a desulfurization system, a pressurization system, a biogas torch, and a biogas generator set connected in sequence; the biogas storage cabinet is provided with a pressure transmitter P interlocked with a bypass valve to deal with the storage safety when the pressure of the biogas storage cabinet is high. The pressurization system is a booster fan, which is provided with a pressure switch P interlocked with the booster fan to ensure that the biogas pressure meets the fuel requirements and protects the storage of the biogas storage cabinet. Safety; The biogas torch and the biogas generator set branch are both equipped with pneumatic regulating valves, which are interlocked with the pressure switch and the hydrogen sulfide concentration detector H2S at the gas outlet. The biogas torch and the biogas generator set are used to deal with conditions such as excess biogas and composition that does not meet the fuel requirements. Excess biogas is preferentially introduced into the biogas generator set; The organic waste liquid system includes a filter and a booster pump connected in sequence, and is equipped with a pressure transmitter P interlocked with a valve to regulate the flow of the waste liquid. Excess waste liquid is transported back to the waste liquid storage tank via a bypass; The desulfurization system adopts A / B tank dry desulfurization. The transmission pipelines before and after the desulfurization equipment are equipped with hydrogen sulfide concentration detectors. The frequency of the fan is adjusted according to the detection data of the instrument before the equipment, so that the frequency is increased at low concentration and reduced at high concentration, thereby controlling the residence time of the exhaust gas in the desulfurization equipment and ensuring that the hydrogen sulfide concentration detected by the instrument after the equipment meets the standard; If the concentration of hydrogen sulfide detected by the instrument after the equipment continues to increase, it indicates that the desulfurizer needs to be oxidized and regenerated. The system automatically controls the valve switch to start the desulfurization tank B, and the desulfurization tank A starts the regeneration program.

8. The comprehensive treatment control system for waste gas in complex working conditions of the pharmaceutical factory according to claim 1 is characterized in that: The heat recovery system refers to the heat recovery of exhaust gas after treatment by the high-concentration treatment system, specifically refers to the heat recovery of the heat exchange process between the high-temperature gas and the rotor analysis intake air in route one and the heat recovery of the heat exchange process between the high-temperature gas and the sewage in the sewage pool in route two.

9. The heat recovery system according to claim 8, characterized in that: The rotor analysis air intake of the route 1 is the rotor cooling exhaust. After heat exchange in the 1# heat exchanger, a temperature transmitter T is provided on the analysis air intake pipeline, which is interlocked with the valve on the high-temperature air pipeline. The temperature of the analysis air intake is controlled by regulating the flow rate of the high-temperature air. Route 2 uses indirect heat exchange between high-temperature gas and sewage, including 2# heat exchanger, 3# heat exchanger and hot water storage tank; the 2# heat exchanger is used for heat exchange between high-temperature gas and circulating water, the hot water storage tank is used for temporary storage of circulating water, and the 3# heat exchanger is used for heat exchange between sewage and heated circulating water. Temperature transmitters T and valve interlocks are installed on the gas and sewage delivery pipelines, and the exhaust gas after heat recovery is discharged through the exhaust pipe under the transportation of 11# fan.

10. The comprehensive treatment control system for waste gas in complex working conditions of the pharmaceutical factory according to claim 1 is characterized in that: The control system selected is but not limited to a DCS control system or a PLC control system, and the control system redundancy design used includes but is not limited to a controller redundancy design, an I / O card redundancy design, and a power supply redundancy design.

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