ES2540426B1 - System of regulation of ventilation air flows in warehouses of urban solid waste treatment facilities and regulation procedure - Google Patents

System of regulation of ventilation air flows in warehouses of urban solid waste treatment facilities and regulation procedure Download PDF

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ES2540426B1
ES2540426B1 ES201530031A ES201530031A ES2540426B1 ES 2540426 B1 ES2540426 B1 ES 2540426B1 ES 201530031 A ES201530031 A ES 201530031A ES 201530031 A ES201530031 A ES 201530031A ES 2540426 B1 ES2540426 B1 ES 2540426B1
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waste treatment
ventilation
treatment facilities
control
solid waste
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ES2540426A1 (en
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Eduardo FERNÁNDEZ GIMÉNEZ
Joan COLÓN JORDÀ
David Gabriel Buguña
Javier LAFUENTE SANCHO
Antonio SÁNCHEZ FERRER
Sergio PONSÁ SALAS
Marc VINOT
Cristina ÁLVAREZ REQUENA
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Urbaser SA
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Urbaser SA
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/50—Air quality properties

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  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Atmospheric Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Quality & Reliability (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Signal Processing (AREA)
  • Feedback Control In General (AREA)
  • Ventilation (AREA)
  • Processing Of Solid Wastes (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)

Abstract

Sistema de regulación de caudales de aire de ventilación en naves de instalaciones de tratamiento de residuos sólidos urbanos y procedimiento de regulación que es un procedimiento de control automático destinado a la optimización de la regulación del caudal de ventilación de las naves en instalaciones de tratamiento de residuos y el sistema con el que llevarlo a cabo. El control automático comprende un conjunto de lazos cerrados de control individuales integrados en el sistema de control y adquisición de datos de la instalación. Cada uno de los lazos opera en función de la medida de la concentración de diversas sustancias inorgánicas y de compuestos orgánicos volátiles totales en el interior de la nave y, de acuerdo a un valor de consigna de concentración, actúa sobre el ventilador correspondiente.Ventilation air flow regulation system in warehouses of urban solid waste treatment facilities and regulation procedure which is an automatic control procedure aimed at optimizing the regulation of the ventilation flow of the ships in waste treatment facilities and the system with which to carry it out. The automatic control comprises a set of individual closed control loops integrated in the control and data acquisition system of the installation. Each of the loops operates according to the measurement of the concentration of various inorganic substances and total volatile organic compounds inside the ship and, according to a concentration setpoint, acts on the corresponding fan.

Description

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DESCRIPCIONDESCRIPTION

Sistema de regulacion de caudales de aire de ventilacion en naves de instalaciones de tratamiento de residuos solidos urbanos y procedimiento de regulacionVentilation air flow regulation system in warehouses of urban solid waste treatment facilities and regulation procedure

Objeto de la invencionObject of the invention

Es objeto de la presente invencion un sistema y el procedimiento, utilizando dicho sistema, para el control automatico y la optimization de la regulacion del caudal de ventilacion de las naves en instalaciones de tratamiento de residuos solidos urbanos. El control automatico comprende un conjunto de lazos cerrados de control individuales integrados en el sistema de control y adquisicion de datos de la instalacion. Cada uno de los lazos opera en funcion de la medida de la concentration de sustancias quimicas y de los compuestos organicos volatiles totales, tCOVs, en el interior de la nave y, de acuerdo a un valor de consigna de concentracion, actua sobre el ventilador correspondiente.The object of the present invention is a system and the procedure, using said system, for the automatic control and optimization of the regulation of the ventilation flow of the ships in urban solid waste treatment facilities. The automatic control comprises a set of individual closed control loops integrated in the control and data acquisition system of the installation. Each of the loops operates according to the measurement of the concentration of chemical substances and of the total volatile organic compounds, tCOVs, inside the ship and, according to a concentration setpoint, acts on the corresponding fan .

Antecedentes de la invencionBackground of the invention

Los procesos de tratamiento de residuos urbanos siempre se realizan en edificios cerrados que estan mantenidos en presion negativa con el objetivo de controlar las emisiones de polvo y olores. Los sistemas de tratamiento de aire se componen de dos grandes partes: ventilacion y elimination de contaminantes, compuestos odoriferos, particulas, etc.Urban waste treatment processes are always carried out in closed buildings that are kept in negative pressure with the aim of controlling dust and odor emissions. The air treatment systems are composed of two main parts: ventilation and elimination of contaminants, odoriferous compounds, particles, etc.

Para controlar las concentraciones de los diferentes compuestos odoriferos, y la concentracion de particulas en las diferentes areas de proceso de una planta, se aspira el aire asegurando de esta manera unas renovaciones de aire en los diferentes edificios. Los coeficientes de renovation son diferentes segun la zona de la planta, estando siempre en relation con la carga existente en cada una de ellas. Para poder asegurar estas renovaciones unos ventiladores aspiran el aire del ambiente general o bien directamente de los focos de emision y envian el aire a la parte de eliminacion de contaminantes. Estos ventiladores estan funcionando 24h al dia a velocidad constante.To control the concentrations of the different odoriferous compounds, and the concentration of particles in the different process areas of a plant, the air is sucked in, thus ensuring air renewals in the different buildings. The coefficients of renovation are different according to the area of the plant, being always in relation to the existing load in each one of them. In order to ensure these renovations, fans suck the air from the general environment or directly from the emission sources and send the air to the contaminant removal part. These fans are running 24 hours a day at constant speed.

La parte de eliminacion de contaminantes se compone siempre de las etapas siguientes: lavado acido para eliminacion de NH3; humidificador y biofiltro. La funcion del biofiltro es la eliminacion del H2S y de los tCOVs.The pollutant removal part is always composed of the following steps: acid wash for NH3 removal; humidifier and biofilter. The function of the biofilter is the elimination of H2S and tCOVs.

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Segun los Kmites de unidades de olores fijados en los contratos se instalan o no etapas posteriores de carbon activo.Depending on the odor unit limits set in the contracts, later stages of active carbon are installed or not.

Estos sistemas son grandes consumidores de energia, pudiendo oscilar segun el tipo de proceso instalado entre 50 y 70% del consumo electrico total de las plantas.These systems are big consumers of energy, being able to oscillate according to the type of installed process between 50 and 70% of the total electrical consumption of the plants.

La presente invention tiene por objeto superar estos inconvenientes. Esta finalidad se consigue mediante un sistema y procedimiento de utilization y por la realization de un lazo cerrado de control que regula el caudal de aire de ventilation de naves en funcion de la concentration de unos gases seleccionados, preferentemente compuestos organicos volatiles totales, tCOVs, amoniaco y sulfuro de hidrogeno.The present invention aims to overcome these drawbacks. This purpose is achieved by a utilization system and procedure and by the realization of a closed control loop that regulates the ventilation air flow of ships based on the concentration of selected gases, preferably total volatile organic compounds, tCOVs, ammonia and hydrogen sulfide.

Descripcion de la invencionDescription of the invention

El sistema de regulacion de caudales de aire de ventilacion en naves de instalaciones de tratamiento de residuos solidos urbanos objeto de la presente descripcion comprende en cada una de las naves de la instalacion:The system of regulation of ventilation air flows in warehouses of urban solid waste treatment facilities object of the present description includes in each of the ships of the installation:

• uno o mas sistemas de ventilacion,• one or more ventilation systems,

• uno o mas conjuntos de sensores de medida de concentracion de gases, cada uno de los sensores es apto para enviar una senal a los dispositivos de control,• one or more sets of gas concentration measurement sensors, each of the sensors is capable of sending a signal to the control devices,

• uno o mas dispositivos de control del funcionamiento de los sistemas de ventilacion aptos para recibir las senales procedentes de los sensores de medida y decidir una actuation sobre cada uno de los sistemas de ventilacion y• one or more control devices for the operation of the ventilation systems capable of receiving the signals from the measurement sensors and deciding an actuation on each of the ventilation systems and

• un sistema de supervision, control y adquisicion de datos, SCADA, apto para el control y supervision remoto del sistema de regulation.• a system of supervision, control and acquisition of data, SCADA, suitable for remote control and supervision of the regulation system.

Y en el procedimiento de regulacion utilizando el sistema de regulacion de caudales de aire de ventilacion en naves de instalaciones de tratamiento de residuos solidos urbanos se predeterminan al menos los siguientes valores de consigna:And in the regulation procedure using the system of regulation of ventilation air flows in warehouses of urban solid waste treatment facilities at least the following setpoints are predetermined:

• Concentracion maxima de NH3 en la atmosfera de cada una de las naves• Maximum concentration of NH3 in the atmosphere of each of the ships

• Concentracion maxima de tCOVs en la atmosfera de cada una de las naves• Maximum concentration of tCOVs in the atmosphere of each of the ships

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• Y preferentemente la concentration maxima de H2S en la atmosfera de cada una de las naves• And preferably the maximum concentration of H2S in the atmosphere of each of the ships

Y cada uno de los dispositivos de control realiza en control de los sistemas de ventilation mediante un lazo cerrado de control individual de cada una de las variables de consigna teniendo preferencia la regulation de las variables de consigna de NH3 y H2S sobre la variable de consigna de tCOVs.And each of the control devices performs in control of the ventilation systems by means of a closed loop of individual control of each of the setpoint variables having preference the regulation of the setpoint variables of NH3 and H2S over the setpoint variable of tCOVs

Description de las figurasDescription of the figures

1,2, 3, ..., n S1, S2, S3,..., Sn1,2, 3, ..., n S1, S2, S3, ..., Sn

Fig. 1: vista esquematica de realization del procedimiento en que se aplica a un conjunto de naves independientes, donde:Fig. 1: schematic view of the realization of the procedure in which it is applied to a set of independent ships, where:

Naves de tratamiento en donde se aplica el sistema de control (ej. nave de reception, nave de pretratamiento, nave de compostaje, etc.). Conjuntos de sensores que integran el sistema de medida de concentraciones de gases. Principalmente aunque no limitativamente cada uno de los conjuntos de sensores de medida incluira sensores electroqtimicos de NH3, un sensor de fotoionizacion para el analisis de los tCOVs y, preferentemente, sensores electroqtimicos de H2S. En cada nave se instalara un mmimo de un set de sensores, aunque preferiblemente se instalaran tres sets completos en cada nave. Conjunto de controladores, encargados de recibir la senal de los sensores y decidir una actuation sobre los ventiladores de cada nave. Conjunto de ventiladores responsables de la aireacion de cada nave. Cada nave puede disponer de mas de un ventilador.Treatment ships where the control system is applied (eg reception hall, pretreatment hall, composting warehouse, etc.). Sensor sets that integrate the gas concentration measurement system. Mainly but not limited to each of the sets of measurement sensors will include electrochemical sensors of NH3, a photoionization sensor for the analysis of tCOVs and, preferably, electrochemical sensors of H2S. A minimum of one set of sensors will be installed on each ship, although three complete sets will preferably be installed on each ship. Set of controllers, responsible for receiving the signal from the sensors and deciding an actuation on the fans of each ship. Set of fans responsible for the aeration of each ship. Each ship can have more than one fan.

PC-SCADA Sistema de Supervision, Control y Adquisicion de Datos (SCADA) que permite controlar y supervisar el proceso a distancia.PC-SCADA Data Supervision, Control and Acquisition System (SCADA) that allows remote control and monitoring of the process.

C1, C2, C3,...,Cn V1, V2, V3,..., Vn AC1, C2, C3, ..., Cn V1, V2, V3, ..., Vn A

Fig. 2: evolution a lo largo del tiempo (expresado en horas) de la concentracion de compuestos organicos volatiles totales en el interior de una nave de pretratamiento de una planta de tratamiento mecanico-bilogico (MBT) de residuos municipales. Durante este periodo de tiempo la concentracion maxima de NH3 fue de 12 ppmv y la minima de 1 ppmv, la concentracion maxima de H2S estuvo por debajo del limite de detection (0.1 ppmv). Por lo tanto, en dicha situation, en donde ningun parametro analizado esta por encima de los limites legales establecidos, no se efectuaria ningun control de seguridad y el caudal estariaFig. 2: evolution over time (expressed in hours) of the concentration of total volatile organic compounds inside a pretreatment hall of a mechanical-bilogic treatment plant (MBT) of municipal waste. During this period of time the maximum concentration of NH3 was 12 ppmv and the minimum 1 ppmv, the maximum concentration of H2S was below the detection limit (0.1 ppmv). Therefore, in this situation, where no parameter analyzed is above the established legal limits, no safety control would be carried out and the flow would be

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controlado mediante un control ON-OFF con histeresis de lazo cerrado basado en la concentration de tCOVs, en el que la position OFF coincide con una ventilation que garantice un caudal mmimo predeterminado.controlled by an ON-OFF control with closed loop hysteresis based on the concentration of tCOVs, in which the OFF position coincides with a ventilation that guarantees a predetermined minimum flow.

Figura 3: evolution a lo largo del tiempo (expresado en horas) de la concentracion de compuestos organicos volatiles totales y amoniaco en el interior de una nave de compostaje de una planta de tratamiento mecanico-bilogico (MBT) de residuos municipales. Durante este periodo de tiempo la concentracion maxima de NH3 fue de 68 ppmv y la minima de 13 ppmv, la concentracion maxima de H2S estuvo por debajo del limite de detection (0.1 ppmv). Por lo tanto, en dicha situation se realizaria mediante la consigna de seguridad referida al limite legal de exposition en areas de trabajo en las horas en las que la concentracion se amoniaco fuera superior a este, y por el contrario, cuando la concentracion de amoniaco fuera inferior no se efectuaria ningun control de seguridad y el caudal estaria controlado mediante un control ON-OFF con histeresis de lazo cerrado basado en la concentracion de tCOVs, en el que la posicion OFF coincide con una ventilacion que garantice un caudal mmimo predeterminado.Figure 3: Evolution over time (expressed in hours) of the concentration of total volatile organic compounds and ammonia inside a composting warehouse of a mechanical-bilogic treatment plant (MBT) of municipal waste. During this period of time the maximum concentration of NH3 was 68 ppmv and the minimum of 13 ppmv, the maximum concentration of H2S was below the detection limit (0.1 ppmv). Therefore, in this situation it would be carried out by means of the security slogan referred to the legal limit of exposure in work areas at the hours in which the concentration was higher than this, and on the contrary, when the concentration of ammonia was no safety control would be carried out and the flow rate would be controlled by an ON-OFF control with closed loop hysteresis based on the concentration of tCOVs, in which the OFF position coincides with a ventilation that guarantees a predetermined minimum flow.

Realization preferente de la inventionPreferred realization of the invention

La presente invencion, el sistema y el procedimiento son totalmente novedosos ya que actualmente no se regula el caudal de aire de ventilacion de naves en instalaciones de tratamiento de residuos solidos urbanos. Esta innovation supone un ahorro significativo en los costes operativos de la instalacion.The present invention, the system and the procedure are totally novel since the ventilation air flow of ships in urban solid waste treatment facilities is currently not regulated. This innovation represents a significant saving in the operating costs of the installation.

La regulacion del caudal de aire de ventilacion en funcion de la concentracion de gases se realizara preferentemente mediante dos tipos de variables de consigna:The regulation of the ventilation air flow depending on the gas concentration will preferably be carried out by means of two types of setpoint variables:

(i) unas variables de consigna de seguridad referidas a los limites legales de exposicion en areas de trabajo y(i) security setpoint variables referred to the legal exposure limits in work areas and

(ii) (ii) una variable de consigna basada en los tCOVs que regulara el caudal de aire de ventilacion de la nave en el caso que no se superen los limites legales de exposicion en areas de trabajo.(ii) (ii) a setpoint variable based on the tCOVs that will regulate the ventilation air flow of the ship in the event that the legal limits of exposure in work areas are not exceeded.

El Real Decreto 374/2001, transposition de la Directiva 98/24/CE, sobre la protection de la salud y la seguridad de los trabajadores contra los riesgos relacionados con los agentes qtimicos durante el trabajo remite a los valores limite de exposicion profesional publicadosRoyal Decree 374/2001, transposition of Directive 98/24 / EC, on the protection of the health and safety of workers against the risks related to chemical agents during work refers to the published occupational exposure limit values

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por el Instituto Nacional de Seguridad e Higiene en el Trabajo (INSHT) como valores de referencia para la evaluation y control de los riesgos originados por la exposition de los trabajadores a agentes qwmicos. En este sentido y despues de un analisis exhaustivo se concluye que las concentraciones de NH3 y H2S no pueden superar dichos valores Kmites en las instalaciones de tratamiento de residuos.by the National Institute of Occupational Safety and Health (INSHT) as reference values for the evaluation and control of the risks caused by the exposure of workers to chemical agents. In this sense and after an exhaustive analysis it is concluded that the concentrations of NH3 and H2S cannot exceed these Kmites values in the waste treatment facilities.

Por lo tanto, las variables de consigna de seguridad en el sistema de control propuesto se basaran en asegurar unas concentraciones inferiores a los Valores Limites Ambientales, VLA o VLA-EC, propuestos por el INSHT u otros organismos competentes. En este sentido, la regulation se basara preferentemente en las concentraciones de NH3 y H2S. Los VLA para el NH3 y H2S son actualmente 20 y 5 ppmv respectivamente. Este valor esta sujeto a periodicas actualizaciones tanto por la INSHT como por otros organismos, y por lo tanto tambien deberan modificarse en el sistema de control propuesto para amoldarse a los futuros cambios legislativos. En el supuesto que la senal enviada desde los sensores al dispositivo de control indique que la concentration de NH3 o H2S sea superior al VLA o VLA- EC, la respuesta del dispositivo de control debera ser abrir los ventiladores hasta que las concentraciones de dichos compuestos sean inferiores a los VLA o VLA-EC mediante un control de lazo cerrado. En el supuesto que la senal enviada desde los sensores al dispositivo de control indique que la concentracion de dichos compuestos es inferior al VLA o VLA-EC, el dispositivo de control no realizara ninguna actuation a partir de dicha senal y la actuacion sobre los ventiladores sera dictada a partir de la concentracion de tCOVs.Therefore, the safety setpoint variables in the proposed control system will be based on ensuring lower concentrations than the Environmental Limit Values, VLA or VLA-EC, proposed by the INSHT or other competent bodies. In this sense, the regulation will preferably be based on the concentrations of NH3 and H2S. The VLAs for NH3 and H2S are currently 20 and 5 ppmv respectively. This value is subject to periodic updates by both INSHT and other organizations, and therefore they must also be modified in the proposed control system to adapt to future legislative changes. In the event that the signal sent from the sensors to the control device indicates that the concentration of NH3 or H2S is higher than the VLA or VLA-EC, the response of the control device should be to open the fans until the concentrations of said compounds are lower than VLA or VLA-EC through a closed loop control. In the event that the signal sent from the sensors to the control device indicates that the concentration of said compounds is lower than the VLA or VLA-EC, the control device will not perform any action from said signal and the action on the fans will be dictated from the concentration of tCOVs.

En caso que no se superen los VLA o VLA-EC la ventilation sera regulada a partir de un control de lazo cerrado a partir de un valor de referencia de tCOVs. Experimentalmente se ha observado una variation diaria en la concentracion de tCOVs, esta variation de tCOVs esta positivamente relacionada con la concentracion de H2S y olores. Se propone principalmente aunque no limitativamente un control ON-OFF con histeresis de lazo cerrado en el que la position OFF corresponde con una ventilacion que garantice un caudal de aire predeterminado, que usualmente coincidira con el caudal mmimo de renovation de aire impuesto por las diversas legislaciones.In case the VLA or VLA-EC is not exceeded, ventilation will be regulated from a closed loop control based on a reference value of tCOVs. Experimentally, a daily variation in the concentration of tCOVs has been observed, this variation of tCOVs is positively related to the concentration of H2S and odors. It is mainly proposed but not limited to an ON-OFF control with closed loop hysteresis in which the position OFF corresponds to a ventilation that guarantees a predetermined air flow, which will usually coincide with the minimum air renewal flow imposed by the various laws .

El valor de consigna de tCOVs debera ser analizado previamente en cada una de las naves en donde se implante el sistema de control propuesto.The setpoint value of tCOVs must be previously analyzed in each of the ships where the proposed control system is implemented.

Con la presente invention se ha conseguido desarrollar un sistema que permite minimizar el consumo energetico en las naves de las plantas de tratamiento de residuos.With the present invention it has been possible to develop a system that allows to minimize energy consumption in the warehouses of the waste treatment plants.

Claims (6)

55 1010 15fifteen 20twenty 2525 3030 REIVINDICACIONES 1. Sistema de regulation de caudales de aire de ventilation en naves de instalaciones de tratamiento de residuos solidos urbanos caracterizado porque en cada una de las naves de la instalacion se dispone al menos:1. Regulation system of ventilation air flows in warehouses of urban solid waste treatment facilities characterized in that in each of the premises of the installation at least: a. uno o mas sistemas de ventilacion,to. one or more ventilation systems, b. uno o mas conjuntos de sensores de medida de concentration de gases, cada uno de los sensores es apto para enviar una senal a los dispositivos de control,b. one or more sets of gas concentration measurement sensors, each of the sensors is capable of sending a signal to the control devices, c. uno o mas dispositivos de control del funcionamiento de los sistemas de ventilacion aptos para recibir las senales procedentes de los sensores de medida y decidir una actuation sobre cada uno de los sistemas de ventilacion yC. one or more control devices for the operation of the ventilation systems capable of receiving the signals from the measurement sensors and deciding an actuation on each of the ventilation systems and d. un sistema de supervision, control y adquisicion de datos apto para el control y supervision remoto del sistema de regulacion.d. a supervision, control and data acquisition system suitable for remote control and supervision of the regulation system. 2. Sistema de regulacion de caudales de aire de ventilacion en naves de instalaciones de tratamiento de residuos solidos urbanos segun reivindicacion 1 caracterizado porque cada uno de los conjuntos de sensores comprende al menos los siguientes sensores:2. Ventilation air flow regulation system in warehouses of urban solid waste treatment facilities according to claim 1 characterized in that each of the sensor assemblies comprises at least the following sensors: a. un sensor de medida electroquimico de medida de la concentracion de N3H yto. an electrochemical measurement sensor measuring the concentration of N3H and b. un sensor de medida por fotoionizacion de medida de la concentracion de compuestos organicos volatiles totales, tCOVs.b. a measurement sensor by measurement photoionization of the concentration of total volatile organic compounds, tCOVs. 3. Sistema de regulacion de caudales de aire de ventilacion en naves de instalaciones de tratamiento de residuos solidos urbanos segun reivindicacion 2 caracterizado porque cada uno de los conjuntos de sensores comprende un sensor de medida electroquimico de medida de la concentracion de H2S.3. Ventilation air flow regulation system in warehouses of urban solid waste treatment facilities according to claim 2, characterized in that each of the sensor assemblies comprises an electrochemical measurement sensor of H2S concentration measurement. 4. Procedimiento de regulacion de caudales de aire de ventilacion en naves de instalaciones de tratamiento de residuos solidos urbanos utilizando el sistema de regulacion segun las reivindicaciones anteriores caracterizado porque se predeterminan al menos los siguientes valores de consigna.4. Procedure for regulating ventilation airflows in warehouses of urban solid waste treatment facilities using the regulation system according to the preceding claims characterized in that at least the following setpoints are predetermined. • Concentracion maxima de NH3 en la atmosfera de cada una de las naves• Maximum concentration of NH3 in the atmosphere of each of the ships • Concentracion maxima de tCOVs en la atmosfera de cada una de las naves Y porque cada uno de los controladores realiza el control de los sistemas de ventilacion mediante un lazo cerrado de control individual de cada una de las variables de consigna teniendo preferencia la regulacion de la variable de consigna 5 de NH3.• Maximum concentration of tCOVs in the atmosphere of each of the ships And because each one of the controllers carries out the control of the ventilation systems by means of a closed loop of individual control of each one of the setpoint variables having preference the regulation of the setpoint variable 5 of NH3. 5. Procedimiento de regulacion de caudales de aire de ventilacion en naves de instalaciones de tratamiento de residuos solidos segun reivindicacion 4 caracterizado porque se predetermina el siguiente valor de consigna:5. Procedure for regulating ventilation air flows in ships of solid waste treatment facilities according to claim 4 characterized in that the following setpoint value is predetermined: 10 • Concentracion maxima de H2S en la atmosfera de cada una de las naves.10 • Maximum concentration of H2S in the atmosphere of each of the ships. 6. Procedimiento de regulacion de caudales de aire de ventilacion en naves de instalaciones de tratamiento de residuos solidos urbanos segun reivindicacion 4 o 5 caracterizado porque el lazo cerrado de control de al menos la variable de consigna 15 de tCOVs es un control On - Off con histeresis de lazo cerrado en el que la posicion6. Procedure for regulating ventilation airflows in warehouses of urban solid waste treatment facilities according to claim 4 or 5 characterized in that the closed control loop of at least the setpoint variable 15 of tCOVs is an On-Off control with closed loop hysteresis in which the position OFF coincide con una ventilacion que produzca un caudal mmimo de renovacion de aire predeterminado.OFF matches a ventilation that produces a minimum predetermined air renewal flow rate.
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US6711470B1 (en) * 2000-11-16 2004-03-23 Bechtel Bwxt Idaho, Llc Method, system and apparatus for monitoring and adjusting the quality of indoor air
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