TWI796206B - Intelligent multifunctional environmental protection device - Google Patents

Abstract

An intelligent multifunctional environmental protection device, a mixing chamber is used to receive and accommodate an external air and an exhaust gas, so that the external air is used to dilute the exhaust gas to form a safe concentration gas; a heating chamber passes the safe concentration gas through a first A heating source and a second heating source are heated to output a heating gas; a composite catalyst consists of a plurality of VOC catalysts and a plurality of SCR catalysts overlapping with each other, so that the nitrogen oxide in the heating gas and the Volatile organic compounds are output by adsorption; a terminal oxidation catalyst is used to deal with the residual nitrogen oxides to form a clean air output; a controller is used to store complex isoconcentration curves, and according to the determined complex concentration index, Calculate a dilution ratio for diluting the nitrogen oxides or the volatile organic compounds, and adjust the compounding concentration of the safe concentration gas by floatingly controlling the air supply volume of the blower.

Description

Intelligent multifunctional environmental protection device

The invention relates to an intelligent multifunctional environmental protection device, in particular to an environmental protection device for completely removing nitrogen oxides and volatile organic compounds.

The conventional method for removing sulfur oxides and nitrogen oxides contained in the waste gas from the factory is such as the Taiwan Application No. 107103833 patent case (hereinafter referred to as the cited case), and its main constituent features are: the present invention relates to a In filter units, specifically in filter baghouses with one or more catalytic fabric filter assemblies, SOx and ammonia removal-SCR is used to purify exhaust gases containing sulfur oxides (SOx) and nitrogen oxides (NOx) method; and the main disadvantage of its composition is that it cannot treat nitrogen oxides (NOx) and volatile organic compounds (VOC) at the same time.

習用環保裝置所會面臨的預熱、消耗能源的問題，因而衍生眾多專利，如臺灣申請第093217539、096106594、096106594、099106043、103123267、104104517、104114109、104109120、107113873、109110140以及公告CN214147938U、CN212841621U、CN211955387U , CN210951341U, CN206950978U, CN110671708A, CN106925112A, The above-mentioned problems mentioned in CN104930525A, KR102238253B1, KR20150037356A, and US2018250661A1 can be solved together in the present invention, which is quite practical.

The purpose of the present invention is to provide an intelligent multifunctional environmental protection device by using different treatment conditions of VOC catalysts and multiple SCR catalysts.

The intelligent multi-functional environmental protection device that can achieve the above-mentioned purpose of the invention includes: a mixing chamber for receiving and accommodating an external air and an exhaust gas, the exhaust gas contains a nitrogen oxide and a volatile organic compound, making the external air For diluting the exhaust gas to form a safe concentration gas with a first temperature, and setting a plurality of sensors to measure the concentration of the external air, the nitrogen oxide and the volatile organic compound in the safe concentration gas Determination; a heating chamber, the safe concentration gas is heated through a first heating source of a second temperature and a second heating source of a third temperature to output a heating gas with a fourth temperature, which is Heating is performed in the priority order specified by the second heating source, and the first heating source is scheduled in accordance with the priority order of the heating task in conjunction with the second heating source; a composite catalyst is composed of multiple VOC catalysts Overlaid with multiple SCR catalysts, the VOC catalyst is composed of a metal substrate with a catalytic coating with high-efficiency start-up and high dispersion. The catalytic coating is composed of metals with an average particle size of A large unit of platinum group metals between 0.48nm and 0.7nm and a small unit of platinum group metals with an average particle size between 0.26nm and 0.48nm, the proportion of the small unit of platinum group metals can be relatively The total amount of the large-unit platinum group metal and the small-unit platinum group metal is 20% by weight or less, so as to form the catalytic coating with a specific surface area of 300m ² /g to 500m ² /g, set at subzero temperature or The VOC catalyst at normal temperature can adsorb the volatile organic compound in the heating gas, so that the heat generated by the VOC catalyst can be guided to the output of the second heating source, and the heating gas can simultaneously heat the SCR catalyst. and reduce the nitrogen oxides in the heated gas to form a treated air which is output through a catalyst outlet; a second nitrogen oxide sensor is used to sense the treated air introduced into the catalyst outlet Measure the content of the nitrogen oxides; a terminal oxidation catalyst, which is used to reduce and remove the residual nitrogen oxides contained in the treated air, so as to form a clean air output; a reducing agent injector is set on the heating A reducing agent is connected between the rear end of the chamber and the front end of the composite catalyst, and when the second nitrogen oxide sensor senses the nitrogen oxide content, the reducing agent is used to treat the gas contained in the heating The nitrogen oxides in the nitrogen oxides are reduced to reduce the proportional amount of the nitrogen oxides; a controller stores a plurality of isoconcentration curves, and according to the concentration curves and the measured external air, the nitrogen oxides, the A concentration index of volatile organic compounds to calculate a dilution ratio for diluting the concentration of nitrogen oxides or volatile organic compounds, and then calculate a concentration gradient of the external air with a concentration matching technique to generate a concentration control Parameters are used to control the air supply volume of a blower by floating, and to control the concentration of the external air sent into the mixing chamber from the blower to adjust the compounding concentration of the safe concentration gas.

1: Mixing chamber

11:Oxygen sensor

12: Nitrogen oxide sensor

13: Hydrocarbon sensor

14: Safe concentration gas

2: blower

21: Outside air

3: Exhaust gas

31: Nitrogen oxides

32: Volatile Organic Compounds

5: Heating chamber

51: The first heating source

52: Second heating source

53: heating gas

54: Heat recovery device

55: thermal storage device

6: Composite catalyst

61: VOC catalyst

62: SCR catalyst

63: Process air

64: Second nitrogen oxide sensor

7: Controller

8: terminal oxidation catalyst

81: clean air

9:Reductant injector

91: reducing agent

Fig. 1 is the system diagram of intelligent multifunctional environmental protection device of the present invention; Fig. 2 is the processing flowchart of this controller; Fig. 3 is the schematic flow sheet of this composite catalyst combined with heat recovery device; Fig. 4 is this composite catalyst combined with heat Schematic flow diagram of the recycler and heat storage device; and FIG. 5 is a schematic flow diagram of the heat storage device in FIG. 4 providing heat energy to the hydrogen generator.

Please refer to Fig. 1 and Fig. 2, the intelligent multifunctional environmental protection device provided by the present invention mainly includes: a mixing chamber 1, a blower 2, a heating chamber 5, a composite catalyst 6, a controller 7, a The terminal oxidation catalyst 8 and a reducing agent injector 9 constitute; the mixing chamber 1 (mixing chamber) is used to receive and contain an external air 21 and an exhaust gas 3, the exhaust gas 3 includes a nitrogen oxide 31 (NOx) and A volatile organic compound 32 (VOC), for setting an oxygen sensor 11, an A nitrogen oxide sensor 12 and a hydrocarbon sensor 13; when used to receive the external air 21 and the exhaust gas 3 from the mixing chamber 1, the external air 21 is used to dilute the exhaust gas 3 to form a safe concentration gas 14 (safe concentration gas) with a first temperature, and set up a plurality of sensors to detect the external air 21, the nitrogen oxide 31 and the volatility in the safe concentration gas 14 A concentration determination of the organic compound 32, so that the oxygen sensor 11 performs the concentration determination of the external air 21 in the safe concentration gas 14, and the nitrogen oxide sensor 12 performs the safe concentration gas The concentration measurement of a nitrogen oxide 31 in 14 , the hydrocarbon sensor 13 performs the concentration measurement of the volatile organic compound 32 in the safe concentration gas 14 .

A plurality of sensors are configured to be connected to the safe concentration gas 14, including: an oxygen sensor 11, a nitrogen oxide sensor 12 and a hydrocarbon sensor 13, when the external air 21 dilutes the exhaust gas 3 to form the safe concentration gas 14, the oxygen sensor 11 calculates the gas concentration (gas concentration) of the external air 21 in the safe concentration gas 14, and the nitrogen oxide sensor 12 calculates the safe concentration gas The gas concentration of the nitrogen oxide 31 in 14 enables the hydrocarbon sensor 13 to calculate the gas concentration of the volatile organic compound 32 in the safe concentration gas 14 .

The air blower 2 controls the air supply volume of the external air 21 (outside air) by changing the speed of the air blower 2 in accordance with a concentration value of the safe concentration gas 14, and the controller 7 according to the oxygen sensor 11 The measured value of the air blower 2 is used to control the air volume of the air blower 2, and the concentration of the external air 21 sent into the mixing chamber 1 from the blower 2 is controlled to adjust the compounding concentration of the safe concentration gas 14.

The heating chamber 5 is input to the heating chamber 5 for receiving the safe concentration gas 14, so that the safe concentration gas 14 designated as a summand (summand) is designated as a first addend (first addend) by having a A first heating source 51 (first heating source) of the second temperature and a second heating source 52 (second heating source) designated as a second addend (second addend) and having a third temperature are heated up, so that the summing the summand, the first summand and the second summand to obtain a heating gas 53 designated as a sum and outputting a fourth temperature; the second temperature is set at the first A temperature sensor in the heating source 51 detects, and the temperature sensor is connected to the controller 7 to measure temperature. The third temperature is detected by a temperature sensor disposed in the second heating source 52 , and the temperature sensor is connected to the controller 7 to measure the temperature.

The first heating source 51 can be an electric heating device or a burner. The first heating source 51 can be configured to continuously heat the gas at a safe concentration 14 to a known target temperature, ie the second temperature, during operation of the external air 21 or the exhaust gas 3 being input into the mixing chamber 1 .

In this embodiment, when performing multiple heating tasks, the controller 7 does not adopt the principle of starting first and stopping heating first, but schedules according to the priority order that the second heating source 52 is the first heating order.

The controller 7 can determine the preset heating upper limit of the fourth temperature by determining a plurality of heating priorities and a prescribed heating cut-off time, because the fourth temperature can be a fixed value or a floating value, when While the fourth temperature maintains the temperature at a known target temperature, any variation in the temperature cycle or temperature range over which the fourth temperature is expected to be maintained is not an abnormal condition.

If the temperature range of the fourth temperature remains much lower or higher than the desired temperature cycle while maintaining the temperature, this may be due to an external heat source (e.g., the third temperature of the second heating source 52) caused.

If the output value of the fourth temperature is preset to 400° C., the temperature of the safe concentration gas 14 in the heating chamber 5 is 30° C., at this time, the VOC catalyst 61 is not activated, and heat energy cannot be output to the second heating source. 52, then the first heating source 51 is heated to 370° C. and output to the heating chamber 5 . After 5 minutes, the VOC catalyst 61 releases heat to generate 400°C heat energy, then the second heating source 52 outputs 370°C heat energy to the heating chamber 5, and the controller 7 turns off the power supply of the first heating source 51 at the same time to save energy. energy, which is the operation mode of the controller 7 when the fourth temperature is greater than the third temperature.

The above description makes this embodiment schedule the heating sequence of the first heating source 51, the second heating source 52, the first heating source 51 and the second heating source 52 according to the heating priority order, and make The scheduled heating conditions meet the requirement of raising the temperature to the fourth temperature, wherein the fourth temperature does not have a heating time conflict between the first heating source 51 or the second heating source 52 during heating, and the time conflict For the first heating source 51 and the second heating source 52 There are overlaps in the warming time series. Through the above scheduling process, the second heating source 52 can be used as the assigned priority (assignment priority) order to maintain the execution of each heating level sequence, and reduce the heating time and reduce the heating time of the first heating source 51 as much as possible. The number of times, so that the second heating source 52 can be used to perform heating operations in a designated priority order, and the first heating source 51 cooperates with the heating sequence of the second heating source 52 for performing multiple tasks according to the priority order of heating tasks to schedule.

In another explanation, when the output value of the fourth temperature is preset as 300°C, and the temperature of the safe concentration gas 14 in the heating chamber 5 is 30°C, the VOC catalyst 61 is not activated at this time, and cannot output heat energy to For the second heating source 52, the first heating source 51 is heated to 270°C and output to the heating chamber 5; after 5 minutes, the VOC catalyst 61 releases heat to generate 400°C heat energy, and the second heating source 52 passes a heat The recoverer 54 outputs heat energy of 270° C. to the heating chamber 5, as shown in FIG. 3 , and the controller 7 turns off the power supply of the first heating source 51 at the same time. This is when the fourth temperature is lower than the third temperature. Afterwards, the heat recovery device 54 will transmit another 130° C. to a heat storage device 55 for storage through another pipeline, as shown in FIG. 4 .

As shown in Fig. 1, Fig. 3 and Fig. 4, the composite catalyst 6 (composite catalyst) is composed of a plurality of VOC catalysts 61 and a plurality of SCR catalysts 62 overlapping each other, and the VOC catalyst 61 is composed of a patent application number: 109111567 , Patent name: Composed of powder catalyst, the VOC catalyst 61 is composed of a metal base material of a catalytic coating with high-speed starting performance and high dispersion. A large unit of platinum group metals with a diameter between 0.48 nm and 0.7 nm and a small unit of platinum group metals with an average particle size between 0.26 nm and 0.48 nm, the ratio of the small unit of platinum group metals can be Relative to the total amount of the large-unit platinum group metal and the small-unit platinum group metal, it is 20% by weight or less to form the catalytic coating with a specific surface area of 300m ² /g to 500m ² /g; set it below zero The VOC catalyst 61 at subzero temperature or normal temperature can provide the heating gas 53 for cold start-up or warm start-up after a catalyst inlet enters the VOC catalyst 61, so that the volatile organic compound 32 in the heating gas 53 can also be adsorbed by the VOC catalyst 61 to achieve the effect of catalyst incineration, and at the same time make the volatile organic compound 32 quickly react and decompose, and then the VOC The thermal energy generated by the heat release of the catalyst 61 is guided to the second heating source 52 (second heating source) through a heat regenerator and delivered to the heating chamber 5 to heat the safe concentration gas 14 that subsequently enters; brief description The VOC catalyst 61 set at subzero temperature or normal temperature can adsorb the volatile organic compound 32 in the heated gas 53, and the heat generated by the VOC catalyst 61 is guided to the The output of the second heating source 5; and after the heating gas 53 synchronously heats the SCR catalyst 62, the SCR catalyst 62 is maintained at the fourth temperature to the nitrogen oxide 31 (NOx reduction) in the heating gas 53 Reduction is performed to completely reduce the nitrogen oxides 31 to form a process air 63 (process air), and the process air 63 is output through a catalyst outlet.

The flow monitoring method of the intelligent multifunctional environmental protection device of the present invention is to arrange a first pressure sensor upstream of the heating chamber 5, and a second pressure sensor disposed upstream of the composite catalyst 6, and A third pressure sensor disposed downstream of the composite catalyst 6 and a fourth pressure sensor disposed downstream of the terminal oxidation catalyst 8 are formed; the aforementioned plurality of pressure sensors can each output a stress signal.

The controller 7 feeds back the pressure signals from the first pressure sensor, the second pressure sensor, and a flow control signal from the external air 21 and the exhaust gas 3 to output a valve opening control signal, thereby performing feedback control on the switch valve of the external air 21 and the waste gas 3 . That is to say, the flow rates of the safe concentration gas 14 and the heating gas 53 are adjusted to match the flow rate setting signal.

Similarly, the controller 7 feeds back the pressure signals from the third pressure sensor, the fourth pressure sensor, and a flow control signal from the process air 63 and the clean air 81 to output a The valve opening control signal is used for feedback control of the on-off valve of the external air 21 and the waste gas 3 . That is to say, the flow of the processing air 63 and the clean air 81 is adjusted to match the flow setting signal, so as to confirm the safe operation of the heating chamber 5, the composite catalyst 6, and the terminal oxidation catalyst 8.

The second nitrogen oxide sensor 64 is introduced into the catalyst outlet The processing air 63 senses the content (content) of the nitrogen oxides 31, and is arranged between the rear end of the composite catalyst 6 and the front end of the terminal oxidation catalyst 8 described later, in order to sense the processing air 63 The concentration of one of the nitrogen oxides 31 is determined.

The controller 7 is electrically connected to the second nitrogen oxide sensor 64, and then controls the start of the reducing agent injector 9 and the reducing agent 91, and the result sensed by the second nitrogen oxide sensor 64 analysis, and convert the analysis result into a monitoring value, and then send the monitoring value to the external reductant injector 9 through the controller 7, so as to use ammonia or urea as the reductant 91 to inject from the reductant injector 9 into the process air 63.

Since ammonia is generally preferred for economical reasons, the invention is not limited to systems based on ammonia, the concept of the invention can be applied to any system using ammonia compounds, the term ammonia compounds including compounds such as urea, sulfuric acid Ammonium, cyanuric acid and organic amines. In addition, the present invention can be used in a hydrogen-based system, such as a hydrogen generator. As shown in FIG. Hydrogen is injected into the process air 63 from a reducing agent injector 9 to provide hydrogen as the reducing agent 91 .

The terminal oxidation catalyst 8 is to use a diesel oxidation catalyst (diesel oxidation catalyst, DOC) to treat the residual nitrogen oxides 31 (NOx reduction) contained in the treatment air 63 for reduction and removal, so as to completely reduce the residual nitrogen oxides 31 (NOx reduction) in the treatment air. The nitrogen oxides 31 in the air 63 form a clean air 81 (Clean Air) output; by this embodiment, the treatment air 63 passes through Through the terminal oxidation catalyst 8, the residual nitrogen oxides 31 in the treatment air 63 are reduced and removed, and the injection of ammonia or urea as the reducing agent 91 from the reducing agent injector 9 into the treatment air 63 can be reduced. The reducing agent 91 amount of ammonia or urea.

The reducing agent injector 9 (reducing agent injector) is arranged between the rear end of the heating chamber 5 and the front end of the composite catalyst 6, and the reducing agent injector 9 is connected with a reducing agent 91, when the second nitrogen When the oxide sensor 64 senses the content of the nitrogen oxide 31, the controller 7 activates the reducing agent injector 9 to use the reducing agent 91 to treat the nitrogen oxide 31 contained in the heating gas 53 for reduction, In order to reduce the proportional quantity (roportional quantity) of the nitrogen oxides 31; according to this embodiment, the heating gas 53 passes through the VOC catalyst and the SCR, using ammonia or urea, firstly oxidizing the nitrogen in the heating gas 53 Therefore, compared with the case of using only the SCR, the amount of the reducing agent 91 injected from the reducing agent injector 9 into the heating gas 53 can be reduced or the nitrogen oxide can be partially reduced. The amount of material 31.

An implementation method, which includes: using the controller 7 to store a set of calibration data of a complex isoconcentration curve 91 (isoconcentration curve), wherein generating includes: calculating the complex gas concentration (gas concentration) of a plurality of sensors using the isoconcentration curve 91 ) one of the concentration index (concentration index), its The calculation includes calculation using a concentration matching technique; calculating a dilution ratio (dilution ratio) of diluting the concentration of the nitrogen oxide 31; calculating a dilution ratio of diluting the concentration of the volatile organic compound 32; calculating a dilution ratio of the concentration of the external air 21 Concentration gradient (concentration gradient) to generate a concentration control parameter; draw the concentration gradient in a relationship between the concentration curve 91 relationship; and use the controller 7 to float control or open and close the blower 2 based on the concentration control parameter The air supply volume adjusts the matching concentration of the safe concentration gas 14 .

The controller 7 stores a plurality of isoconcentration curves 91 (isoconcentration curve), and the controller 7 is used to receive the concentration measurement of the concentration of the hydrocarbon sensor 13 and the concentration measurement of the concentration of the oxygen sensor 11 , and the concentration measurement of the concentration of the nitrogen oxide sensor 12 to correspond to the equal concentration curve 91, so as to carry out the concentration inspection of the external air 21, the nitrogen oxide 31, and the volatile organic compound 32 (concentration inspecting ) or concentration measurement (concentration measurement), and according to the concentration curve 91 and the measured external air 21, or the nitrogen oxide 31, or a concentration index (concentration index) of the volatile organic compound 32, to Calculate the concentration of dilute the nitrogen oxides 31 or the volatile organic compounds 32 A dilution ratio (dilution ratio), or according to the calculated concentration of the nitrogen oxide 31 or the volatile organic compound 32, a concentration of the external air 21 is calculated by a concentration matching technique Gradient (concentration gradient) to generate a concentration control parameter, and then draw the concentration gradient in the relationship between the concentration curve 91, the controller 7 with floating control (floating control) and opening and closing operation (close-open operation) the air blower 2 to adjust the safe concentration of gas 14 with the concentration (richness of mix).

To sum up, this case is not only truly innovative in terms of space type, but also can enhance the above-mentioned multiple functions compared with commonly used items. It should have fully met the statutory requirements for a novel and progressive invention patent. I would like to file an application in accordance with the law and sincerely request your approval. This invention patent application case is to encourage inventions, and it is very grateful.

1: Mixing chamber

11:Oxygen sensor

12: Nitrogen oxide sensor

13: Hydrocarbon sensor

14: Safe concentration gas

2: blower

3: Exhaust gas

5: Heating chamber

51: The first heating source

52: Second heating source

53: heating gas

6: Composite catalyst

63: Process air

64: Second nitrogen oxide sensor

7: Controller

8: terminal oxidation catalyst

81: clean air

9:Reductant injector

91: reducing agent

Claims (2)

An intelligent multifunctional environmental protection device, comprising: a mixing chamber for receiving and containing an external air and an exhaust gas, the exhaust gas contains a nitrogen oxide and a volatile organic compound, and the external air is used to dilute the exhaust gas to forming a safe concentration gas with a first temperature, and setting a plurality of sensors to measure the concentration of the external air, the nitrogen oxide and the volatile organic compound in the safe concentration gas; a heating chamber, The safe concentration gas is heated through a first heating source of a second temperature and a second heating source of a third temperature to output a heating gas having a fourth temperature as the second heating source Heating is performed in the specified priority order, and the first heating source cooperates with the second heating source to carry out heating sequence scheduling according to the priority order of the heating task; a composite catalyst is composed of multiple VOC catalysts and multiple SCR catalysts. Overlapping each other, the VOC catalyst is composed of a metal substrate with a catalytic coating with high-speed starting performance and high dispersion. The catalytic coating is composed of metals with an average particle size of 0.48 nanometers to 0.7 nanometers. A large unit of platinum group metal between 0.26 nm and a small unit of platinum group metal with an average particle size between 0.26 nm and 0.48 nm, the ratio of the small unit of platinum group metal can be relative to the large unit of platinum group metal The total amount of the metal and the small unit platinum group metal is 20% by weight or less to form the catalytic coating with a specific surface area of 300m ² /g to 500m ² /g, and the VOC catalyst installed at subzero temperature or normal temperature The volatile organic compound in the heating gas can be adsorbed, so that the thermal energy generated by the VOC catalyst is guided to the output of the second heating source, and the heating gas synchronously heats the SCR catalyst and the heating gas The nitrogen oxides in the process are reduced to form a treatment air which is exported through a catalyst outlet; a second nitrogen oxide sensor is used to sense the nitrogen oxides in the treatment air introduced into the catalyst outlet content; a terminal oxidation catalyst, for the treatment of the residual nitrogen oxides contained in the treatment air for reduction and removal, to form a clean air output; a reducing agent injector, which is arranged at the rear end of the heating chamber and the A reducing agent is connected between the front ends of the composite catalyst, and when the second nitrogen oxide sensor senses the content of the nitrogen oxide, the reducing agent is used to treat the nitrogen oxide contained in the heating gas performing reduction to reduce the proportion of the nitrogen oxides; a controller for storing multiple isoconcentration curves, and according to the isoconcentration curves and the measured one of the external air, the nitrogen oxides, and the volatile organic compounds Concentration index, to calculate the dilution ratio of diluting the concentration of the nitrogen oxide or the volatile organic compound, and then calculate a concentration gradient of the external air with a concentration matching technology to generate a concentration control parameter, to control a floating The air volume of the blower is controlled to control the concentration of the external air sent into the mixing chamber from the blower to adjust the compounding concentration of the safe concentration gas. The intelligent multi-functional environmental protection device as described in item 1 of the scope of the patent application, wherein the treated air passes through the terminal oxidation catalyst to remove residuals in the treated air Reducing and removing the remaining nitrogen oxides can reduce the amount of the reducing agent injected into the treated air from the reducing agent injector.

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