CN115552178A

CN115552178A - Deodorizing device control system

Info

Publication number: CN115552178A
Application number: CN202180033201.XA
Authority: CN
Inventors: 三宫丰; 山野井一郎; 横井浩人
Original assignee: Hitachi Ltd
Current assignee: Hitachi Ltd
Priority date: 2020-08-31
Filing date: 2021-04-20
Publication date: 2022-12-30
Also published as: WO2022044423A1; JP7431703B2; JP2022040548A

Abstract

The deodorizing device control system (10) of the present invention comprises: an odor acquisition unit (500) that acquires the intensity of odor inside a building (110) of a factory (100); an external sensor (300) that measures an external environment of the building (110) to acquire information about the external environment; a deodorizing device (600) as a device for discharging odorous gas inside the building (110) to the outside of the building (110); and an operation control unit (700) that controls the operation of the deodorizing device (600) so that the intensity of odor emitted to the outside of the building (110) is equal to or less than a predetermined reference value, based on the intensity of odor inside the building (110) acquired by the odor acquisition unit (500) and information about the outside environment acquired by the external sensor (300). The deodorizing device control system of the present invention can perform control for discharging odorous gas inside a factory building to the outside of the building in consideration of the external environment of the building.

Description

Deodorizing device control system

Technical Field

The present invention relates to a system for controlling a deodorizing means in accordance with the intensity of smell.

Background

Maintenance management operations in plants such as chemical plants, power plants, water supply and sewerage plants, and garbage disposal plants are sometimes performed depending on the five senses and experience of operators, for example, when the operators hear abnormal sounds that are not normally present, such as stopping the equipment. In such maintenance management business, even if the plant is continuously operated for 24 hours, operators often stay at the premises to cope with the operation. However, if the human hand is insufficient, it may be difficult to deal with such a situation.

To continue the maintenance management business of the plant even if the hands are insufficient, the five senses and experience of replacing operators with IoT and AI technologies are advancing. For example, there is a technique of diagnosing a change in the appearance of equipment or products by processing images and videos captured by a camera instead of the vision of an operator. In addition, there is a technique of detecting abnormal sounds of a device by processing sound data collected by a microphone instead of auditory sounds. Such a technique has started to be provided as a solution in recent years.

In addition to the visual sense and the auditory sense, it is important that the sense of smell of the operator is also used to sense offensive odors (e.g., burnt odors or malodors) occurring in the plant. The kinds of odors are various and the intensities are different from each other, and therefore, they are fields of substitution which have not been developed yet as compared with the visual sense and auditory sense. In maintenance management business in a plant, for example, there is a technique of providing an odor sensor and a concentration sensor capable of measuring an odor substance in a device in the plant and replacing the odor of an operator with these sensors.

Patent documents 1 to 2 describe examples of technologies for detecting odor using a sensor and controlling a deodorizing device and a ventilating device using the detected data. The kitchen waste treatment apparatus described in patent document 1 includes an exhaust unit that discharges odor components in exhaust gas, an odor sensor that detects odor of the exhaust gas, and a deodorizing unit that deodorizes the exhaust gas, and the deodorizing unit is activated based on a detection result of the odor sensor. The deodorization control system described in patent document 2 includes an odor sensor, a deodorization device for deodorizing an odor gas, a damper and a fan for controlling the ventilation amount of a duct, and controls the start and stop of the deodorization device in accordance with the concentration of the odor gas detected by the odor sensor, controls the exhaust, intake, and stop of the fan, and controls the opening and closing of the damper.

Documents of the prior art

Patent literature

Patent document 1: japanese patent laid-open No. 2003-340414

Patent document 2: japanese patent laid-open publication No. 2013-17976

Disclosure of Invention

Problems to be solved by the invention

In the conventional techniques such as the techniques described in patent documents 1 and 2, an odor sensor is provided in the interior of a building of a factory or in an exhaust passage of gas, and odor data detected by the odor sensor is used to control a deodorizing device and a ventilating device. Conventionally, a deodorizing device and a ventilation device are controlled without considering the environment outside a building, and an odor gas inside the building is discharged to the outside of the building. When odor gas is discharged from a building without taking into consideration the external environment, even if the intensity of odor satisfies a reference value, there is a possibility that the odor reaches a house around a factory or the like and adversely affects the living environment.

The invention aims to provide a deodorizing device control system which considers the environment outside a building and controls the stink gas inside the building of a factory to be discharged outside the building.

Means for solving the problems

The deodorizing device control system of the present invention comprises: an odor acquisition unit that acquires the intensity of odor inside a building of a factory; an external sensor that measures an external environment of the building to acquire information about the external environment; a deodorization device as a device for discharging odorous gas inside the building to the outside of the building; and an operation control unit that controls an operation of the deodorizing device so that the intensity of the odor of the odorous gas discharged to the outside of the building is equal to or less than a predetermined reference value, based on the intensity of the odor of the inside of the building acquired by the odor acquisition unit and the information on the external environment acquired by the external sensor.

Effects of the invention

According to the present invention, it is possible to provide a deodorizing device control system capable of performing control for discharging an odor gas inside a factory building to the outside of the building in consideration of the environment outside the building.

Drawings

Fig. 1 is a diagram showing a configuration example of a control system of a deodorization device in embodiment 1 of the present invention.

Fig. 2 is a graph showing an example of the relationship between the concentration of hydrogen sulfide in water, which is a causative substance of odor, and the oxidation-reduction potential of treated water, which is information on the operation state of a plant.

Fig. 3 is a graph showing an example of the relationship between the amount of exhaust gas from the ventilation unit and the intensity of odor inside the building of the factory.

Fig. 4 is a diagram showing an example of the relationship between the intensity of the odor on the right-of-land boundary and the wind direction.

Fig. 5 is a flowchart showing a flow of operation control of the operation control unit for the ventilation unit as the deodorization device in example 1.

Fig. 6 is a diagram showing the configuration of a control system of a deodorization device according to embodiment 2 of the present invention.

Fig. 7 is a flowchart showing a flow of operation control performed by the operation control section of the deodorizing device, i.e., the ventilating section and the deodorizing section in embodiment 2.

Fig. 8 is a diagram showing a configuration of a control system of a deodorization device according to embodiment 3 of the present invention.

Fig. 9 is a flowchart showing a flow of operation control of the operation control unit for the ventilation unit as the deodorization device in example 3.

Detailed Description

The deodorizing device control system of the present invention controls the discharge of odorous gas from the building of a factory using the intensity of the odor inside the building of the factory and information about the external environment of the building of the factory. The intensity of the odor inside the building of the factory is acquired by an odor acquisition unit (for example, an odor generation estimation unit and an odor sensor). Information about the external environment of the building of the plant (e.g., wind speed and wind direction) is acquired by measurement with sensors provided outside the plant.

The deodorizing device control system of the present invention obtains the strength of odor inside a building of a factory by the odor obtaining section and obtains the external environment of the building of the factory by measurement, thereby making it possible to perform control for discharging odorous gas inside the building of the factory to the outside of the building in consideration of the external environment of the building, and to realize optimum operation according to the strength of the odor and the external environment. In addition, the deodorizing device control system of the present invention uses the odor acquisition unit to acquire the intensity of the odor inside the building of the factory, and therefore, labor saving and remote control can be achieved.

Hereinafter, a deodorizing device control system according to an embodiment of the present invention will be described with reference to the drawings. In the drawings used in the present specification, the same reference numerals are given to the same or corresponding components, and repeated explanation of these components may be omitted.

Example 1

A control system of a deodorizing device according to embodiment 1 of the present invention will be explained.

Fig. 1 is a diagram showing a configuration of a control system of a deodorization device according to the present embodiment. The deodorizing device control system 10 is installed in a plant 100, and includes a monitoring control unit 200, an external sensor 300, an information acquisition unit 400, a smell generation estimation unit 500, a ventilation unit 600, and an operation control unit 700.

The monitoring control unit 200 performs monitoring control of facilities and devices of the plant 100, and acquires information on the operating state of the plant 100.

The external sensor 300 is a sensor that is provided outside the plant 100, measures the external environment of the building 110 of the plant 100, and acquires information about the external environment of the building 110 of the plant 100.

The information acquisition unit 400 acquires information on the operation state of the plant 100 obtained by the monitoring control unit 200 and information on the external environment of the building 110 of the plant 100 obtained by the external sensor 300.

The odor occurrence estimation unit 500 is an odor acquisition unit that acquires the intensity of the odor inside the building 110 of the plant 100. The odor generation estimation unit 500 acquires the information on the operation state of the plant 100 acquired by the monitoring control unit 200 from the information acquisition unit 400, and estimates the intensity of the odor inside the building 110 of the plant 100 from the information on the operation state of the plant 100.

The ventilator 600 includes a duct and a fan, and is a device for discharging odorous gas inside the building 110 of the plant 100 to the outside of the building 110, and constitutes a deodorizing device of the deodorizing device control system 10.

The operation control unit 700 controls the operation of the ventilation unit 600 such that the intensity of the odor gas discharged to the outside of the building 110 of the plant 100 is equal to or less than a predetermined reference value, based on the intensity of the odor inside the building 110 of the plant 100 acquired by the odor occurrence estimation unit 500 and the information on the external environment of the building 110 of the plant 100 acquired by the external sensor 300. The operation control section 700 acquires information on the external environment of the building 110 of the plant 100 from the information acquisition section 400. The operation control unit 700 has an output unit, and can output a message and an alarm to the operator by a character and voice.

The monitoring control unit 200, the external sensor 300, the information acquisition unit 400, the odor generation estimation unit 500, the ventilation unit 600, and the operation control unit 700 communicate with each other to transmit and receive information. For this communication, any method such as a wireless LAN or a wired LAN can be used.

The information acquisition unit 400, the odor generation estimation unit 500, and the operation control unit 700 may be configured by a computer. The computer includes a storage device such as a CPU, a memory, and a hard disk, and a network interface, and stores programs for realizing the information acquisition unit 400, the odor generation estimation unit 500, and the operation control unit 700.

The plant 100 is, for example, a chemical plant, a power plant, an on-off water plant, a garbage disposal plant, or the like. In this embodiment, an example in which the plant 100 is a sewage treatment plant is explained. The sewage treatment plant is a facility for purifying sewage of a sewage drain and discharging the purified treated water to a river, a lake or the ocean, and includes a plurality of facilities such as a settling tank, a primary settling tank, a reaction vessel, a final settling tank, a sludge concentration vessel, a sludge dewatering facility, and the like. By the treatment in these apparatuses, substances causing the odor contained in the treatment object are diffused in the spray or released to the atmosphere. In this case, substances released from the air by the dispersion of droplets include viruses, bacteria, and the like in addition to substances causing odors. Among such viruses, various types such as norovirus and coronavirus exist.

The odor-causing substances include hydrogen sulfide, methyl mercaptan, dimethyl sulfide, dimethyl disulfide, ammonia, and the like. In the sewage treatment plant, these odors are collectively regarded as odors, and are managed so that, for example, odor intensity not less than a reference value of a set odor index is not leaked on a boundary of a use place (a boundary between a place of use of the sewage treatment plant and the outside of the sewage treatment plant). In addition, when the treated water is disinfected as a countermeasure against viruses, bacteria, and the like, chlorine used for disinfection causes odors such as chlorine odor and calcium hypochlorite odor. In sewage plants, such odors are also managed as odors.

The monitoring and control unit 200 is a device for monitoring and controlling the operation state of the plant 100, and includes a process controller and the like. In facilities and devices of the plant 100, a large number of sensors are provided, and the operational state of the plant 100 is measured with these sensors. The monitoring control section 200 acquires information on the operation state of the plant 100 from the measurement values of these sensors.

Examples of the information on the operation state of the plant 100 acquired by the monitoring control unit 200 include data obtained by the operation of the plant and signals for controlling the operation of the plant. In the present embodiment, examples of the information on the operation state of the plant 100 include water quality data of treated water such as water temperature, pH, oxidation-reduction potential, TOC (total organic carbon), sludge concentration, treatment data such as a flow rate of treated water and an aeration air volume, and values of control signals indicating an amount of chemical to be introduced and an opening degree of a valve. The monitoring control section 200 acquires, for example, values of the above-described data and signals from sensors provided in the plant 100 as information on the operation state of the plant 100.

The external sensor 300 measures the external environment of the building 110 of the plant 100, and acquires information on the external environment of the building 110 of the plant 100. The external sensor 300 measures at least the acquired wind speed and wind direction as information on the external environment of the building 110 of the plant 100. The external environment of the building 110 of the plant 100, i.e., the wind speed and the wind direction, are factors that have a large influence on the diffusion of causative substances of odors. The external sensor 300 has an anemometer and an anemometer, or a wind direction anemometer, and measures wind speed and wind direction to acquire information on the wind speed and wind direction.

The information on the external environment of the building 110 of the plant 100 may include, for example, humidity, air temperature, odor, and the presence or absence of a person and an object, in addition to the wind speed and the wind direction. For example, when the humidity is high, the causative substance of the odor tends to stay in the air, so that the humidity affects the diffusion of the causative substance of the odor. The external sensor 300 includes at least 1 of a hygrometer, a thermometer, an odor sensor, a camera, a microphone, and the like, and can acquire information on humidity, air temperature, odor, presence or absence of a person and an object.

The information acquisition unit 400 acquires information on the operation state of the plant 100 from the monitoring control unit 200, acquires information on the external environment of the building 110 of the plant 100 from the external sensor 300, and stores the information as time series data. For example, the information acquisition unit 400 acquires and stores the information every 1 minute.

The odor generation estimation unit 500 is an odor acquisition unit that estimates and acquires the intensity of the odor inside the building 110 of the plant 100 based on the information acquired by the monitoring control unit 200. As the intensity of the odor, any of indexes such as odor concentration, odor index, odor intensity, and numerical value of odor obtained by the odor sensor can be used.

The odor occurrence estimation unit 500 previously obtains and stores a model for estimating the intensity of the odor inside the building 110 using the information on the operation state of the plant 100 acquired by the monitoring control unit 200. This model is an odor estimation model representing the relationship between the information on the operating state of the plant 100 acquired by the monitoring control unit 200 and the intensity of the odor inside the building 110.

The odor occurrence estimation unit 500 estimates the intensity of the odor inside the building 110 of the plant 100 from the information on the operation state of the plant 100 acquired by the monitoring control unit 200 using the odor estimation model.

For example, the odor generation estimation unit 500 obtains and stores an estimation model indicating a relationship between data obtained by the operation of the plant 100 (for example, water quality data of treated water) and the intensity of the odor inside the building 110 of the plant 100 in advance, and estimates the intensity of the odor inside the building 110 of the plant 100 from the data obtained by the operation of the plant 100 using the estimation model.

The odor estimation model can be constructed by using an existing method. For example, the odor estimation model can be constructed using information about the operating state of the plant 100 acquired by the monitoring control section 200 and the intensity of the odor inside the building 110 measured with the odor sensor for each operating state. The odor estimation model can be constructed by generating a multi-factor regression model using water quality information or the like as an explanatory variable and the intensity of odor as a response variable, for example, by multi-factor regression analysis which is one type of statistical analysis. In addition, the odor estimation model can be generated by machine learning using a neural network and a data clustering technique. The odor estimation model may be any model as long as it can estimate the intensity of the odor inside the building 110 of the plant 100 from the information on the operation state of the plant 100 acquired by the monitoring control unit 200, and may be constructed by any method.

Fig. 2 is a graph showing an example of the relationship between the concentration of hydrogen sulfide in water, which is a causative substance of odor, and the oxidation-reduction potential of treated water, which is information on the operation state of the plant 100. The vertical axis represents the concentration of hydrogen sulfide. The horizontal axis represents oxidation-reduction potential, increasing from right to left with a negative value. The greater the oxidation-reduction potential in the negative direction, the greater the concentration of hydrogen sulfide in water, the greater the amount of hydrogen sulfide released into the atmosphere, and the stronger the odor.

The odor occurrence estimation unit 500 can acquire the relationship between the oxidation-reduction potential of the treated water and the concentration of hydrogen sulfide in the water as shown in fig. 2, for example, and model the relationship by statistical analysis or machine learning to construct an odor estimation model. The odor estimation model can estimate the intensity of the odor inside the building 110 of the plant 100 based on the concentration of hydrogen sulfide in water (i.e., the amount of hydrogen sulfide released into the atmosphere) from the oxidation-reduction potential of the treated water.

The ventilation unit 600 is a deodorizing device of the deodorizing device control system 10, and includes a duct and a fan, and discharges odorous gas inside the building 110 of the plant 100 to the outside of the building 110. The fan is preferably operated, for example, by inverter control.

The operation control unit 700 controls the operation of the ventilation unit 600 based on the intensity of the odor inside the building 110 of the plant 100 estimated by the odor occurrence estimation unit 500, the information on the external environment of the building 110 of the plant 100 acquired by the external sensor 300, and the exhaust gas amount when the ventilation unit 600 operates the fan. The operation control unit 700 can control the amount of exhaust gas of the ventilator 600 by controlling the start and stop of the operation of the fan or controlling the amount of air blown by the fan. As the amount of exhaust gas of ventilation unit 600 increases, the amount of odor emitted increases, and the intensity of odor inside building 110 decreases significantly.

Fig. 3 is a graph showing an example of the relationship between the exhaust gas amount D of the ventilation unit 600 and the intensity of the odor inside the building 110 of the plant 100. In fig. 3, the odor intensity is represented by odor index O2. The vertical axis represents the odor index O2 inside the building 110. The horizontal axis represents the exhaust gas amount D of the ventilation unit 600. In the case where the intensity of the odor (e.g., odor index) occurring inside the building 110 is constant, the odor index O2 decreases as the exhaust gas amount D increases.

The odor index O2 inside the building 110 when the fan of the ventilator 600 is operated to exhaust air can be estimated by a known equation (1) using the exhaust air amount D of the ventilator 600.

O2＝α×O1/D…(1)

In the formula (1), O1 is the intensity of the odor estimated by the odor occurrence estimation unit 500, that is, the odor index inside the building 110 when the ventilation unit 600 is not exhausting. α is an arbitrary coefficient.

In addition, although the intensity of odor is expressed by odor index in formula (1), any of odor concentration, odor intensity, and numerical value of odor obtained by an odor sensor may be used as the intensity of odor. As the intensity of the odor, an index of the intensity of the odor, which is easily managed in the plant 100, may be used.

The odor gas discharged to the outside of the building 110 of the plant 100 by the ventilator 600 is diffused and diluted by the atmospheric diffusion. In the deodorizing device control system 10 of the present embodiment, the diffusion calculation of the odorous gas discharged from the building 110 of the plant 100 is performed in consideration of the information (wind speed and wind direction) about the external environment of the building 110 of the plant 100 acquired by the external sensor 300, thereby estimating the intensity of the odor on the boundary of the land outside the building 110. The plot boundary refers to a boundary of a plot of the plant 100 with an exterior of the plant 100. In the calculation of the diffusion of the odorous gas, for example, the intensity of the odor on the boundary of the use area of the odorous gas discharged from the building 110 of the plant 100 is determined by a conventional method in consideration of the diffusion of the odor due to wind.

Fig. 4 is a diagram showing an example of the relationship between the intensity of the odor on the right margin and the wind direction. In fig. 4, the intensity of the odor is represented by an odor index. In fig. 4, odor indexes at the windward boundary and the leeward boundary, which are equal in distance from the exhaust point, are compared. Even if the distances to the exhaust points are equal to each other, the odor index on the leeward land boundary is larger than the odor index on the windward land boundary. That is, the downwind is more odorous than upwind.

The odor index on the plot is influenced not only by the discharge amount of the ventilator 600 and the odor index on the discharge point but also by the wind direction. That is, the index of odor on the plot boundary is different depending on whether the plot boundary is located upwind or downwind compared to the exhaust point, as shown in fig. 4. In addition, the odor index on the plot is also affected by the wind speed.

Therefore, in order to exhaust the odorous gas from the building 110 in consideration of the influence on the outside of the plant 100, it is necessary to calculate the diffusion of the odorous gas exhausted from the building 110 in consideration of the external environment (for example, wind speed and wind direction) of the building 110 of the plant 100, and estimate the intensity of the odor on the boundary of the plot. In the present embodiment, the odor index is used as an index of the intensity of the odor calculated in the diffusion calculation, but any index may be used as the index of the intensity of the odor without being limited to the odor index.

Fig. 5 is a flowchart showing a flow of operation control performed by the operation control unit 700 of the present embodiment on the ventilation unit 600 serving as the deodorization device of the present embodiment.

In S1, the operation control section 700 acquires information on the intensity of the odor inside the building 110 of the plant 100 estimated by the odor occurrence estimation section 500 from the odor occurrence estimation section 500.

In S2, the operation control section 700 compares the intensity of the smell acquired in S1 with a reference value of the intensity of the smell inside the building 110 (hereinafter referred to as "indoor reference value"). The indoor reference value can be arbitrarily determined in advance. If the intensity of the acquired odor is equal to or less than the indoor reference value, the process proceeds to S3, and if the intensity of the acquired odor exceeds the indoor reference value, the process proceeds to S4.

In S3, operation control unit 700 stops the operation of ventilation unit 600 when ventilation unit 600 is operating.

In S4, the operation control unit 700 calculates the exhaust gas amount of the ventilation unit 600 based on the intensity of the odor inside the building 110 of the plant 100 acquired in S1 and the indoor reference value. The operation control unit 700 obtains and stores in advance the relationship between the amount of exhaust gas of the ventilation unit 600 and the intensity of the odor inside the building 110 of the plant 100 (for example, fig. 3 and expression (1)). Based on this relationship, the operation control unit 700 calculates the amount of exhaust gas from the ventilation unit 600 so that the intensity of odor inside the building 110 of the plant 100 is equal to or less than the indoor reference value.

In S5, the operation control section 700 acquires information (at least wind speed and wind direction) about the external environment of the building 110 of the plant 100 from the information acquisition section 400.

In S6, the operation control unit 700 calculates the diffusion of the odorous gas discharged from the building 110 of the plant 100 using the amount of exhaust gas of the ventilator 600 calculated in S4 and the information on the external environment acquired in S5, thereby estimating the intensity of the odor on the boundary of the land.

In S7, the operation control unit 700 compares the intensity of the odor on the right of way boundary calculated in S6 with a reference value of the intensity of the odor on the right of way boundary (hereinafter referred to as "reference value of right of way boundary"). The reference value of the right-of-land boundary can be determined arbitrarily in advance. The estimated intensity of the odor on the right margin is advanced to S8 when the intensity is equal to or less than the reference value of the right margin, and advanced to S9 when the intensity exceeds the reference value of the right margin.

In S8, the operation control unit 700 operates the ventilation unit 600 according to the exhaust gas amount calculated in S4, and discharges the odor gas inside the building 110 of the plant 100 to the outside of the building 110. In the ventilation unit 600, the fan is controlled by the operation control unit 700, and the odor gas inside the building 110 of the plant 100 is discharged to the outside of the building 110 with the discharge amount controlled.

In S9, the operation control unit 700 recalculates the amount of exhaust gas of the ventilator 600 so that the intensity of the odor on the right boundary becomes equal to or less than the reference value of the right boundary. The operation control unit 700 gradually reduces the amount of exhaust gas of the ventilator 600, and calculates the amount of exhaust gas of the ventilator 600 such that the intensity of the odor on the estimated right-of-way boundary is equal to or less than the reference value of the right-of-way boundary by performing the same calculation as in S6 using the reduced amount of exhaust gas.

In S10, the operation control unit 700 operates the ventilation unit 600 at the exhaust gas amount recalculated in S9 to discharge the odor gas inside the building 110 of the plant 100 to the outside of the building 110. In the ventilator 600, the fan is controlled by the operation control unit 700, and the exhaust amount is controlled, so that the odor gas inside the building 110 of the plant 100 is exhausted to the outside of the building 110.

In S11, the operation control unit 700 outputs an alarm to the output unit, the alarm notifying the operator that the intensity of the odor inside the building 110 of the plant 100 exceeds the indoor reference value. In the determination process in S2, the operation control unit 700 displays an alarm to be presented to the operator because the intensity of the odor inside the building 110 of the plant 100 estimated by the odor occurrence estimation unit 500 exceeds the indoor reference value. The alarm can be output to the output unit by any method such as a method of displaying characters on a monitor, a method of flashing or lighting a light, and a method of issuing a voice broadcast.

The operation control unit 700 can perform the optimum operation of the ventilator 600 by repeating the flow of the operation control of the ventilator 600 shown in the flowchart of fig. 5 every predetermined time (for example, 1 time every 1 hour). The fan of the ventilator 600 is preferably operated by inverter control, but may be operated by on/off control for discharging the odorous gas at the exhaust gas amount calculated in S4 or S9.

The deodorization device control system 10 according to the present embodiment can perform control for discharging the odorous gas inside the building 110 of the plant 100 to the outside of the building 110 in consideration of the external environment (for example, wind speed and wind direction) of the building 110, and can make the intensity of the odor of the odorous gas on the right-of-way boundary equal to or lower than the reference value of the right-of-way boundary. Therefore, the deodorizing device control system 10 of the present embodiment can prevent the odor of the odor gas from adversely affecting the living environment around the plant 100 even if the odor gas is discharged from the building 110.

The deodorizing device control system 10 of the present embodiment includes the odor occurrence estimation unit 500 as the odor acquisition unit, and can estimate the intensity of the odor inside the building 110 of the plant 100, so that it is possible to save labor and realize remote control. Conventionally, it is difficult to monitor odor at any time, and therefore, in order to prevent strong odor from being generated inside and outside building 110, the deodorizing apparatus is often operated excessively. In the present embodiment, the intensity of the generated odor is estimated, and the operation of the ventilator 600 is stopped according to the estimated intensity of the odor, or the ventilator 600 is controlled so as to discharge the odorous gas at an appropriate discharge rate, so that the optimal operation of the ventilator 600 can be performed, and the energy-saving operation of the deodorizing device control system 10 can be performed.

In addition, the devices and functions of the deodorization device control system 10 according to the present embodiment may be integrated in any combination. The information acquisition unit 400, the odor occurrence estimation unit 500, and the operation control unit 700 may be provided inside the plant 100 or outside the plant 100.

Example 2

A deodorizing device control system 10 according to embodiment 2 of the present invention will be explained. The deodorizing device control system 10 of the present embodiment has the same configuration as the deodorizing device control system 10 of embodiment 1, but is different from the deodorizing device control system 10 of embodiment 1 in that it has a ventilation unit 600 and a deodorizing unit as deodorizing devices. The deodorizing unit reduces (or removes) the odor of the odorous gas when the deodorizing device control system 10 discharges the odorous gas inside the building 110 of the plant 100 to the outside of the building 110.

Hereinafter, the deodorizing device control system 10 of the present embodiment will be mainly described about the points different from the deodorizing device control system 10 of embodiment 1.

Fig. 6 is a diagram showing the configuration of the deodorization device control system 10 according to the present embodiment. The deodorizing device control system 10 of the present embodiment has a deodorizing section 800 in addition to the structure of the deodorizing device control system 10 of embodiment 1.

The deodorizing unit 800 is a device for removing odor substances contained in odor gas discharged from the inside of the building 110 of the plant 100 to the outside of the building 110, and reducing (or removing) the odor of the odor gas, and constitutes a deodorizing device together with the ventilation unit 600. The deodorizing unit 800 may have any structure capable of removing odor substances generated, such as a filter including activated carbon, an ozone generator, and a scrubber. The deodorizing section 800 may reduce the odor from the odor gas before flowing into the ventilation section 600, or may reduce the odor from the odor gas after flowing out of the ventilation section 600. In the present embodiment, the deodorizing section 800 is configured to reduce odor from the odor gas before the odor gas flows into the ventilation section 600.

In the deodorizing device control system 10 of the present embodiment, the deodorizing device can also discharge the odorous gas inside the building 110 of the plant 100 to the outside of the building 110 while avoiding the deodorizing unit 800. That is, the deodorizing device control system 10 of the present embodiment can discharge odor gas inside the building 110 of the plant 100 to the outside of the building 110 by using only the ventilation unit 600 without reducing the odor by the deodorizing unit 800. In the deodorizing device, the duct is configured so that the odor gas can be discharged without flowing through the deodorizing unit 800, avoiding the deodorizing unit 800.

Fig. 7 is a flowchart showing a flow of operation control performed by operation control unit 700 in the present embodiment on ventilation unit 600 and deodorization unit 800, which are deodorization devices in the present embodiment. The operation control unit 700 controls the operation of the ventilation unit 600 and the deodorization unit 800 so that the intensity of the odor gas discharged to the outside of the building 110 of the plant 100 is equal to or less than a predetermined reference value.

In S1, the operation control unit 700 acquires information on the intensity of the odor inside the building 110 of the plant 100, which is estimated by the odor occurrence estimation unit 500, from the odor occurrence estimation unit 500, in the same manner as the processing (fig. 5) in S1 of embodiment 1.

In S2, the operation control section 700 compares the intensity of the odor acquired in S1 with the indoor reference value, as in the process in S2 of embodiment 1. If the intensity of the acquired odor is equal to or less than the indoor reference value, the process proceeds to S23, and if the intensity of the acquired odor exceeds the indoor reference value, the process proceeds to S4.

In S23, operation control unit 700 stops the operations of ventilation unit 600 and deodorization unit 800 when ventilation unit 600 and deodorization unit 800 are operating.

In S4, the operation control unit 700 calculates the amount of exhaust gas from the ventilation unit 600 for setting the intensity of the odor inside the building 110 of the plant 100 to the indoor reference value or less, based on the intensity of the odor inside the building 110 of the plant 100 acquired in S1 and the indoor reference value, in the same manner as the processing in S4 of embodiment 1.

In S5, the operation control unit 700 acquires information (at least wind speed and wind direction) about the external environment of the building 110 of the plant 100 from the information acquisition unit 400, as in the process in S5 of embodiment 1.

In S6, the operation control unit 700 calculates the diffusion of the odorous gas discharged from the building 110 of the plant 100 based on the exhaust gas amount of the ventilation unit 600 calculated in S4 and the information on the external environment acquired in S5, and thereby estimates the intensity of the odor on the land boundary, in the same manner as the processing in S6 of embodiment 1.

In S7, the operation control unit 700 compares the intensity of the odor on the right of way boundary estimated in S6 with the reference value of the right of way boundary, as in the processing in S7 of embodiment 1. The estimated intensity of the odor on the right margin is advanced to S28 when the intensity is equal to or less than the reference value of the right margin, and advanced to S31 when the intensity exceeds the reference value of the right margin.

In S28, the operation control unit 700 discharges the odor gas inside the building 110 of the plant 100 to the outside of the building 110 by using only the ventilation unit 600 without reducing the odor by the deodorization unit 800. The operation control unit 700 operates the ventilation unit 600 in accordance with the exhaust gas amount calculated in S4, and discharges the odorous gas inside the building 110 of the plant 100 to the outside of the building 110 while avoiding the deodorization unit 800. In the ventilation unit 600, the fan is controlled by the operation control unit 700, and the odor gas inside the building 110 of the plant 100 is discharged to the outside of the building 110 with the discharge amount controlled.

In S31, the operation control unit 700 performs the same calculation as in S6, and estimates the intensity of the odor on the boundary of the site of the odorous gas discharged from the building 110 when the deodorizing unit 800 operates to reduce the odor of the odorous gas inside the building 110 of the plant 100. The operation control unit 700 previously obtains and stores the performance (deodorization capability) of the deodorization unit 800 for reducing the strength of the odor when the deodorization unit 800 operates. The deodorization ability of the deodorization section 800 refers to, for example, a degree of reduction in intensity of the odor gas flowing out from the deodorization section 800, as opposed to intensity of the odor gas flowing into the deodorization section 800.

The operation control unit 700 calculates the intensity of odor on the boundary of the land where the deodorizing unit 800 operates, by calculating the diffusion of the odor emitted from the building 110 of the plant 100, taking into account the fact that the deodorizing unit 800 reduces the intensity of the odor inside the building 110 of the plant 100, using the amount of exhaust gas of the ventilating unit 600 calculated in S4 and the information on the external environment acquired in S5.

In S32, the operation control unit 700 compares the intensity of the odor on the right margin estimated in S31 with the reference value of the right margin, in the same manner as in S7. If the intensity of the odor on the right boundary during the operation of the deodorization unit 800 estimated in S31 is equal to or less than the reference value of the right boundary, the process proceeds to S33, and if the intensity of the odor exceeds the reference value of the right boundary, the process proceeds to S29.

In S33, the operation control unit 700 operates the deodorization unit 800, operates the ventilation unit 600 according to the exhaust gas amount calculated in S4, and discharges the odor gas inside the building 110 of the plant 100 to the outside of the building 110 through the deodorization unit 800. The deodorizing section 800 reduces (or removes) the odor of the odor gas discharged from the inside of the building 110 of the plant 100 to the outside of the building 110. In the ventilator 600, the operation controller 700 controls the fan to discharge the odor gas inside the building 110 of the plant 100 to the outside of the building 110 with the discharge amount controlled.

In S29, the operation control unit 700 recalculates the displacement of the ventilator 600 so that the intensity of the odor at the right margin at the time of operation of the deodorization unit 800 estimated in S31 is equal to or less than the reference value of the right margin. The operation control unit 700 gradually reduces the amount of exhaust gas of the ventilator 600, and calculates the amount of exhaust gas of the ventilator 600 such that the intensity of the odor on the estimated right-of-way boundary is equal to or less than the reference value of the right-of-way boundary by performing the same calculation as in S6 using the reduced amount of exhaust gas. However, the operation control unit 700 performs the diffusion calculation of the odorous gas discharged from the building 110 of the plant 100, taking into account the fact that the deodorizing unit 800 reduces the intensity of the odor of the odorous gas inside the building 110 of the plant 100.

In S30, the operation control unit 700 operates the deodorization unit 800, operates the ventilation unit 600 according to the exhaust gas amount recalculated in S29, and discharges the odorous gas inside the building 110 of the plant 100 to the outside of the building 110 through the deodorization unit 800. The deodorizing section 800 reduces (or removes) the odor of the odorous gas discharged from the inside of the building 110 of the plant 100 to the outside of the building 110. In the ventilator 600, the operation controller 700 controls the fan to discharge the odor gas inside the building 110 of the plant 100 to the outside of the building 110 with the discharge amount controlled.

In S11, the operation control unit 700 outputs an alarm to the output unit to notify the operator that the intensity of the odor inside the building 110 of the plant 100 exceeds the indoor reference value, in the same manner as the processing in S11 of embodiment 1.

The operation control unit 700 can perform the optimum operation of the ventilation unit 600 and the deodorization unit 800, which are the deodorization devices, by repeating the flow of the operation control of the ventilation unit 600 and the deodorization unit 800 shown in the flowchart of fig. 7 every predetermined time period (for example, 1 time per 1 hour).

In the deodorizing device control system 10 of the present embodiment, the deodorizing device includes the ventilating section 600 and the deodorizing section 800, and thus the intensity of the odor of the odorous gas discharged to the outside of the building 110 of the plant 100 can be effectively reduced. Since the deodorizing unit 800 operates according to the intensity of the odor of the discharged odorous gas, it is not necessary to operate at any time, and the life can be extended. For example, when the deodorizing unit 800 is formed of a filter having activated carbon, the period until the activated carbon is exchanged can be made longer, and the life can be prolonged.

Example 3

A deodorizing device control system 10 according to embodiment 3 of the present invention will be explained. The deodorizing device control system 10 of the present embodiment is different from the deodorizing device control system 10 of embodiment 1 in that it has the same configuration as the deodorizing device control system 10 of embodiment 1, but does not include the monitoring control unit 200 and the odor generation estimating unit 500, and has an odor sensor inside the building 110 of the plant 100. The odor sensor measures the intensity of the odor inside the building 110 of the plant 100. The deodorizing device control system 10 of the present embodiment performs operation control of the ventilating section 600 based on the information on the external environment of the building 110 of the plant 100 acquired by the external sensor 300 and the intensity of the odor inside the building 110 of the plant 100 acquired by the odor sensor.

Fig. 8 is a diagram showing the configuration of the deodorization device control system 10 according to the present embodiment. In the deodorizing device control system 10 of the present embodiment, the deodorizing device control system 10 of embodiment 1 does not have the monitoring control unit 200 and the odor occurrence estimation unit 500, and has the odor sensor 900 inside the building 110 of the plant 100.

The odor sensor 900 is an odor acquisition unit that acquires the intensity of the odor inside the building 110 of the plant 100 by measurement. As the odor sensor 900, any sensor can be used as long as it can obtain the intensity of odor by measurement, and for example, a semiconductor type sensor using an oxidation-reduction reaction, a chemical type sensor using an adsorption film or the like that adsorbs an odor substance, a biological type sensor using an olfactory cell, a photoacoustic type sensor using the principle of photoacoustic spectroscopy, or the like can be used. In addition, in the case where the plant 100 is a sewage treatment plant, since a causative substance of a main odor has already been identified, as the odor sensor 900, for example, a sensor (for example, a hydrogen sulfide sensor, an ammonia sensor, or the like) capable of measuring the concentration of the causative substance of the odor can be used.

Fig. 9 is a flowchart showing a flow of operation control performed by operation control unit 700 in the present embodiment on ventilation unit 600, which is the deodorization device in the present embodiment. The operation control unit 700 controls the operation of the ventilation unit 600 so that the intensity of the odor of the odorous gas discharged to the outside of the building 110 of the plant 100 is equal to or less than a predetermined reference value. Hereinafter, differences from the flow of the operation control by the operation control unit 700 in embodiment 1 (fig. 5) will be mainly described.

In S41, the operation control unit 700 acquires the intensity of the odor inside the building 110 of the plant 100 from the odor sensor 900. The odor sensor 900 acquires the intensity of the odor inside the building 110 of the plant 100 by measurement.

In S2, the operation control unit 700 compares the intensity of the odor acquired in S1 with the indoor reference value in the same manner as the processing in S2 of embodiment 1 (fig. 5). The intensity of the odor acquired in S1 is the intensity of the odor inside the building 110 of the plant 100 measured by the odor sensor 900. If the intensity of the acquired odor is equal to or less than the indoor reference value, the process proceeds to S43, and if the intensity of the acquired odor exceeds the indoor reference value, the process proceeds to S4.

In S43, operation control unit 700 reduces the amount of exhaust gas from ventilation unit 600 while ventilation unit 600 is operating. The operation control unit 700 can reduce the amount of exhaust gas of the ventilation unit 600 in accordance with the intensity of the odor inside the building 110 of the plant 100 measured by the odor sensor 900. In this embodiment, the intensity of the odor inside the building 110 of the plant 100 is not estimated but measured by the odor sensor 900, so that the operation control unit 700 can finely control the amount of exhaust gas of the ventilation unit 600 in accordance with the intensity of the odor.

In the subsequent processes S4 to S11, the same processes as those of the processes S4 to S11 in the embodiment 1 are performed.

Since the deodorizing device control system 10 of the present embodiment includes the odor sensor 900 as the odor acquisition unit, the intensity of the odor inside the building 110 of the plant 100 can be actually measured instead of being estimated, and the amount of exhaust gas from the ventilation unit 600 can be controlled in accordance with the actually measured intensity of the odor, whereby the intensity of the odor gas exhausted to the outside of the building 110 of the plant 100 can be effectively reduced, and the energy-saving operation of the deodorizing device control system 10 can be performed.

The deodorizing device control system 10 of the present embodiment can include the monitoring control unit 200 and the odor occurrence estimation unit 500, as in the deodorizing device control system 10 of embodiment 1. In the case where the monitoring control unit 200 and the odor occurrence estimation unit 500 are provided, the operation control unit 700 compares the intensity of the odor actually measured by the odor sensor 900 with the intensity of the odor estimated by the odor occurrence estimation unit 500, and sets the intensity of the stronger odor as the intensity of the odor inside the building 110 of the plant 100. In this way, the influence of the odor of the odorous gas discharged from the building 110 on the living environment around the plant 100 can be effectively reduced.

The deodorizing device control system 10 of the present embodiment may also include the ventilator 600 and the deodorizing section 800 as the deodorizing device, as in the deodorizing device control system 10 of embodiment 2.

The present invention is not limited to the above-described embodiments, and various modifications can be made. For example, the above embodiments are described in detail to explain the present invention easily and understandably, and the present invention is not limited to the embodiment having all the configurations described. In addition, a part of the structure of one embodiment may be replaced with the structure of another embodiment. In addition, the structure of another embodiment can be added to the structure of a certain embodiment. In addition, some of the configurations of the embodiments may be deleted, or other configurations may be added or replaced.

Description of the reference numerals

10 method 8230, a deodorization device control system 100 method 8230, a factory 110 method 8230, a building 200 method 8230, a monitoring control part 300 method 8230, an external sensor 400 method 8230, an information acquisition part 500 method 8230, an odor generation estimation part 600 method 8230, a ventilation part 700 method 8230, an operation control part 800 method 8230, a deodorization part 900 method 8230and an odor sensor.

Claims

1. A deodorizing device control system characterized by comprising:

an odor acquisition unit that acquires the intensity of odor inside a building of a factory;

an external sensor that measures an external environment of the building to acquire information about the external environment;

a deodorization device as a device for discharging odorous gas inside the building to the outside of the building; and

and an operation control unit that controls an operation of the deodorizing device so that the intensity of the odor of the odorous gas discharged to the outside of the building is equal to or less than a predetermined reference value, based on the intensity of the odor of the inside of the building acquired by the odor acquisition unit and the information on the external environment acquired by the external sensor.

2. The deodorizing device control system according to claim 1, wherein:

the external sensor acquires, as information on the external environment, at least wind speed and wind direction by measurement.

3. The deodorizing device control system according to claim 1, wherein:

has a monitoring control unit for monitoring and controlling facilities and devices of the plant to acquire information on the operating state of the plant,

the odor acquisition section has an odor occurrence estimation section that acquires intensity of odor inside the building by estimation from the information on the operation state acquired by the monitoring control section.

4. The deodorizing device control system according to claim 3, wherein:

the monitoring control section acquires data obtained by the operation of the plant as information on the operation state,

the odor generation estimation unit estimates the intensity of the odor inside the building from the data using the relationship between the data and the intensity of the odor inside the building, which is obtained in advance.

5. The deodorizing means control system according to claim 1, wherein:

the operation control part is used for controlling the operation of the air conditioner,

calculating an exhaust gas amount of the deodorizing means from the intensity of the odor of the interior of the building,

performing a diffusion calculation of the odorous gas discharged from the building using the calculated amount of exhaust gas and information on the external environment to estimate the intensity of the odor outside the building,

recalculating the exhaust amount of the deodorizing device so that the estimated intensity of the odor outside the building is equal to or less than the reference value,

operating the deodorizing means in accordance with the recalculated exhaust gas amount.

6. The deodorizing device control system according to claim 1, wherein:

the deodorizing device has a ventilation part having a fan.

7. The deodorizing device control system according to claim 6, wherein:

the deodorizing device has a deodorizing unit for removing an odorous substance contained in the odorous gas.

8. The deodorizing device control system according to claim 1, wherein:

the odor acquisition unit includes an odor sensor that is provided inside the building and acquires the intensity of the odor inside the building by measurement.

9. The deodorizing means control system according to claim 3, wherein:

the odor acquisition unit has an odor sensor that is provided inside the building and acquires the intensity of the odor inside the building by measurement,

the operation control unit compares the intensity of the odor measured by the odor sensor with the intensity of the odor estimated by the odor occurrence estimation unit, and determines the intensity of the stronger odor as the intensity of the odor inside the building.

10. The deodorizing device control system according to claim 9, wherein:

the deodorizing device has a ventilation part having a fan.

11. The deodorizing device control system according to claim 10, wherein: