KR100992511B1 - Pulverulent body storage amount measuring apparatus for eliminating nitrogen oxide and dioxin measuring amount of pulverulent body by using air pressure - Google Patents

Abstract

PURPOSE: A device for measuring the storage quantity of pulverized body for a nitric oxide/dioxin removing apparatus is provided to enable a manager to easily check the quantity of pulverized bodies. CONSTITUTION: A device for measuring the storage quantity of pulverized body for a nitric oxide/dioxin removing apparatus comprises a measuring rod(10), a pressure pipe(20), a compressor(30), and a controller(40). The measuring rod is formed in the shape of a tube. The measuring rod comprises an air hole of a longitudinal direction. The pressure pipe comprises a pressure gauge which is connected to the measuring rod and is installed on a pipe. The compressor connects to the pressure pipe and generates pulse air pressure according to external control. The compressor discharges pulse air pressure to the measuring rod.

Description

PURVERULENT BODY STORAGE AMOUNT MEASURING APPARATUS FOR ELIMINATING NITROGEN OXIDE AND DIOXIN MEASURING AMOUNT OF PULVERULENT BODY BY USING AIR PRESSURE}

The present invention relates to a device for measuring the amount of powder, and in particular, a nitrogen oxide for measuring the amount of powder using a pulsed air pressure to measure and display the amount of powdered catalyst remaining in the catalyst storage tank using a pulsed air pressure. And a powder storage amount measuring device for a dioxin removing device.

Flue gases in combustion facilities such as incinerators and boilers include nitrogen oxides (NO _X , ie NO, NO ₂ , N ₂ O, N ₂ O ₅ , mainly NO), sulfur oxides (SO _X ), dust, dioxins, heavy metals, Hazardous pollutants, such as VOCs (Volatile Organic Compounds), are included, which must be treated at or below regulated concentrations before being released into the atmosphere.

The prior art in this field includes precombustion control and combustion control to remove nitrogen oxides generated in a combustion facility, and since the two technologies alone are difficult to achieve the desired level of nitrogen oxide removal and low cost, post combustion control technology As a result, research and application of selective catalytic reduction (SNCR) and selective catalytic reduction (SCR) technologies have been conducted depending on the use of a catalyst.

Selective Catalytic Reduction (SCR), which is a typical denitrification process in the prior art, generally uses precious metals such as platinum and palladium or other transition metals such as vanadium, iron, and cobalt, and is used for titanium dioxide, vanadium oxide, alumina, zeolite, and the like. It is a technology to selectively convert only nitrogen oxides to nitrogen gas by spraying a reducing agent on a catalyst heated to a high temperature by loading or filling a catalyst prepared by the reaction in a reaction tower. However, in this method, in order to maintain the temperature of the exhaust gas from the pretreatment facility at a temperature range of 250 to 350 ° C., which is a suitable temperature for reacting with the catalyst in the catalyst tower, heating facilities and reaction towers are installed according to a separate heat source. There are many initial investment costs and the increased cost of using expensive catalysts compared to SNCR technology. In addition, when sulfur oxides are present in the reaction process, there is a problem of generating acid oil (NH ₄ HSO ₄ ) by reducing agent injection, and when a large amount of scattering dust is present, poisoning and frequent replacement of catalysts are frequently performed. Subsequently, a pretreatment process has a disadvantage in that a dust collecting facility or a desulfurization facility must be added.

Thus, generally due to the majority of SCR technology that is commercially applied in the in removing the NO _X to N ₂ in the vicinity of 350 ℃ very efficient technique although, wear of the catalyst, the exchange, the poisoning in order to remove NO _X NO _X Problems such as unreacted ammonia (NH ₃ Slip) have been pointed out to reduce the conversion of or cause side reactions such as reducing agent oxidation before the removal reaction.

As an alternative to these technologies, the SNCR technology, which is economically inexpensive and simple to apply, has been studied as a method of controlling nitrogen oxides, but it is inadequate due to low efficiency and difficulty in operating under proper operating conditions compared to SCR. It is a process that does not process simultaneously. Conventional denitrification process patents are the first most of the catalytic process (SCR) or in-house injection (SNCR), the new technology, such as plasma discharge technology, the second is most of the denitrification technology by the adsorption method of the tower column reactor of the adsorption column type The technique using was the main technique.

However, among these methods, adsorption using carbon without a catalyst is an economical and simple method, but it has not been commercialized due to carbon consumption due to adsorption / regeneration, pressure drop in the adsorption tower, and efficiency reduction.

In particular, the impregnated activated carbon process using a metal oxide in the conventional process using carbon uses an adsorption tower that fills the reaction column with granulated or pelletized activated carbon having a particle size of about 2 to 4 mm as shown in FIG. In order to replace the activated carbon after the reaction, the tower operation was stopped or a separate reactor had to be installed.

In order to solve this problem, the applicant has developed Patent Registration Publication No. 0897370 (name: Injecting powder type catalyst into the filter bag and removing device and removal method of nitrogen oxide and dioxin from combustion exhaust gas).

Referring to FIG. 1, the powdered catalyst is injected into a filter bag to remove nitrogen oxides and dioxins 100 from combustion exhaust gas. The apparatus 100 includes a duct 110, a reducing agent injection line 120, and a first filter bag ( 130, a second filter bag 140, a catalyst supply device 150, a regeneration device 160, a matrix duct reactor 170, a blower 180, and a chimney 190.

First, the combustion duct 110 is introduced into the duct 110 into a normal duct.

The reducing agent injection line 120 is connected to the duct 110 to inject ammonia NH 3 as a reducing agent into the combustion exhaust gas passing through the duct 110.

In addition, the first filter bag 130 is subjected to a reduction process by introducing a combustion exhaust gas injected with ammonia (NH 3).

In addition, the second filter bag 140 removes nitrogen oxides, dioxins, heavy metals, VOCs, and the like from the processing gas supplied through the connection pipe 131 connected to the first filter bag 130.

On the other hand, the catalyst supply device 150 is connected to the catalyst storage tank 151, and supplies an unused powder catalyst that has not yet been used as an adsorbent.

In addition, the regeneration device 160 receives the powdered catalyst collected in the lower portion of the second filter bag 140, washes and dries it, and then the second filter bag 140 through the catalyst recirculation pipe 161 and the connection pipe 131. ), The already used powdered catalyst is recycled.

In addition, the matrix duct reactor 170 is installed between the connecting pipe 131 between the first filter bag 130 and the second filter bag 140.

In addition, the blower 180 is connected to the second filter bag 140 to forcibly discharge the oxidation treatment gas from which nitrogen oxide, dioxins, heavy metals, VOCs, etc. are removed from the second filter bag 140.

On the other hand, the chimney 190 discharges the oxidation treatment gas forcibly discharged through the blower 180 to the atmosphere.

When the powdered catalyst is injected into the filter bag to explain the method of removing nitrogen oxides and dioxins from the combustion exhaust gas, ammonia (NH ₃ ) as a reducing agent is injected into the combustion exhaust gas, and the injected ammonia (NH ₃ ) is used. The combustion exhaust gas is reduced by the first filter bag 130, and the process gas generated in the reduction process is passed through the powdered catalyst to remove nitrogen oxides and dioxins in the combustion exhaust gas from the second filter bag 140.

Then, the powdered catalyst discharged from the removal process is recovered by the regeneration device 160, regenerated, and then reinserted into the removal process, and the combustion exhaust gas is discharged to the matrix duct reactor after treatment of the first filter bag 130 of the combustion exhaust gas. 170) to increase the contact time and residence time of the reducing agent and the powdered catalyst to increase the nitrogen oxide removal efficiency.

However, the conventional powdered catalyst is injected into the filter bag to remove nitrogen oxides and dioxins from the combustion exhaust gas, and the catalyst storage tank supplies the powdered catalyst stored in the catalyst storage tank of the catalyst storage device into the second filter bag. There is a problem in that the amount of powder of the powder catalyst remaining inside cannot be accurately measured.

In addition, by injecting the conventional powder catalyst into the filter bag, the nitrogen oxide and dioxin remover from the combustion exhaust gas cannot accurately check the powder content of the powder catalyst remaining in the catalyst storage tank, so that the catalyst can be transferred into the second filter bag. When the powder amount of the powdered catalyst to be supplied is small, there is a problem in that the removal ability of nitrogen oxide and dioxins in the combustion exhaust gas is relatively low.

The present invention is to solve the above problems, by measuring the powder amount of the powdered catalyst remaining in the catalyst storage tank using the pulse air pressure to display the pulse air pressure so that the administrator can easily check the powder amount It is an object of the present invention to provide a powder storage amount measuring device for nitrogen oxide and dioxin removing device for measuring the amount of powder.

In addition, the present invention is to measure and display the powder amount of the powdered catalyst remaining in the catalyst storage tank using the pulsed air pressure, thereby the administrator maintains the appropriate powder amount in the combustion exhaust gas due to exhaustion of the powdered catalyst Another object of the present invention is to provide a powder storage amount measuring device for nitrogen oxide and dioxin removing apparatus, which measures powder amount using pulse air pressure to prevent the removal of nitrogen oxide and dioxin in advance.

Features of the present invention for achieving the above object,

In the powder storage amount measuring device of the nitrogen oxide and dioxin removal device comprising a catalyst storage tank in which the powdered catalyst is stored, the powder storage amount measuring device is a pulse air pressure of a predetermined size into the catalyst storage tank in which the powdered catalyst is stored It is characterized in that the powder amount of the powdered catalyst is measured by comparing the pressure measured by injection and a predetermined reference pressure value.

Here, the powder storage amount measuring device is formed in the form of a tube, the measuring rod is installed vertically in the catalyst storage tank is arranged in the longitudinal direction of the air holes of the same diameter in a predetermined pattern; A pressure pipe connected with the measuring rod and having a pressure gauge installed on the pipe line; A compressor connected to the pressure pipe and generating pulse air pressure according to an external control to discharge pulse air pressure to the measuring rod through the pressure pipe; And a controller which measures and displays the powder amount of the powdered catalyst by comparing the pressure measured by the pressure gauge with a predetermined reference pressure value.

Here, the measuring rods are arranged at the same distance radially with respect to the vertical center line of the catalyst storage tank.

The pressure pipe may further include: a branch pipe whose one end is radially connected to the respective measuring rods and has the same length, and the pressure gauge is installed; An adapter formed in a cylindrical shape and connected to the other end of each branch pipe; Vertical pipes whose one end is vertically connected to a central portion of the upper surface of the adapter; And an extension pipe connecting the other end of the vertical pipe to the compressor.

Here, the extension pipe is provided with a solenoid valve that generates pulse air pressure by intermittently opening and closing the extension pipe under the control of the controller.

Here, the reference pressure value stores the powder type catalyst in the catalyst storage tank for each height, and stores each pressure measured by injecting a pulse air pressure of a predetermined size as data in a table form.

Here, the controller controls the opening and closing of the solenoid valve and compares any one of the minimum value, the maximum value, or the average value among the pressures measured by the pressure gauge with the reference pressure value to increase the powder type catalyst through the height. Measure the amount of powder.

According to the powder storage amount measurement device for nitrogen oxide and dioxin removal device using the pulse air pressure of the present invention configured as described above, the powder amount of the powdered catalyst remaining in the catalyst storage tank by using the pulse air pressure By measuring and displaying, the administrator can easily check the amount of powder, which makes maintenance easy and prevents the system from being stopped due to the exhaustion of the powdered catalyst.

In addition, according to the present invention, when the powder amount of the powdered catalyst remaining in the catalyst storage tank is measured and displayed using the pulse air pressure, the manager maintains the powdered amount appropriately through this, and the exhaust gas is exhausted due to the exhaustion of the powdered catalyst. The inability to remove nitrogen oxide and dioxins in water can be prevented beforehand.

FIG. 1 is a system diagram showing a device for removing nitrogen oxides and dioxins from combustion exhaust gas by injecting a general powder type catalyst into a filter bag.
FIG. 2 is a system diagram showing a powder storage amount measuring device measuring a powder amount using a pulse air pressure according to the present invention applied to a nitrogen oxide and dioxin removing device from combustion exhaust gas by injecting a powder catalyst into a filter bag.
Figure 3 is a perspective view showing the configuration of the powder storage amount measurement device for nitrogen oxide and dioxin removal device for measuring the powder amount using the pulse air pressure according to the present invention.
4 is a front cross-sectional view of FIG. 3.

Hereinafter, with reference to the accompanying drawings, the configuration of the nitrogen oxide and dioxin removal device for measuring the amount of powder using a pulse air pressure according to the present invention in detail as follows.

In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. The following terms are defined in consideration of the functions of the present invention, and may be changed according to the intentions or customs of the user, the operator, and the like. Therefore, the definition should be made based on the contents throughout the specification.

FIG. 2 is a schematic diagram showing a powder storage measuring device for measuring a powder amount using a pulse air pressure according to the present invention applied to a nitrogen oxide and dioxin removing device from combustion exhaust gas by injecting a powder catalyst into a filter bag. FIG. 3 is a perspective view showing the configuration of a nitrogen oxide and a powder storage amount measuring device for a dioxin removing device for measuring the powder amount using a pulse air pressure according to the present invention, Figure 4 is a front sectional view of FIG.

2 to 4, the powder storage amount measuring device 1 for nitrogen oxide and dioxin removing device for measuring the powder amount using the pulse air pressure according to the present invention includes a measuring rod 10 and a pressure pipe 20. ), The compressor 30 and the controller 40. In the drawings, reference numeral duct 110, a reducing agent injection line 120, a first filter bag 130, a second filter bag 140, a catalyst supply device 150, and a regeneration device 160 are described. ), The matrix duct reactor 170, the blower 180, and the chimney 190 have the same configuration as in the prior art, and their overlapping description is omitted.

First, the measuring rod 10 is formed of a metal or a synthetic resin in the form of a tube, the air holes 11 of the same diameter (S1) in the longitudinal direction are arranged with a predetermined pattern and vertically in the catalyst storage tank 151 Is installed. Here, the measuring rod 10 has the same length (L1) and the same diameter (S2), it is disposed at the same distance (L2) radially with respect to the vertical center line (C1) of the catalyst storage tank 151. Here, the diameter of the air hole 11 is formed larger than the diameter of the powdered catalyst to facilitate the inflow of the powdered catalyst. Here, the lower end of the measuring rod 10 is spaced a predetermined distance from the bottom of the catalyst storage tank 151 so that the powdered catalyst introduced into the air hole 11 through the lower end is discharged.

In addition, the pressure pipe 20 has a cylindrical shape with a branch pipe 21 having one end connected to each measuring rod 10 and having the same length L2 radially, and having a pressure gauge 22 installed on the pipeline. The adapter 23 which is formed and connected to the other end of each branch pipe 21, the vertical pipe 25 whose one end is vertically connected to the center of the upper surface of the adapter 23, and the other end of the vertical pipe 25 and It consists of an extension pipe 27 for connecting the compressor 30 to be described later. Here, it is preferable that the pressure gauge 22 is an electronic type which outputs a pressure value as analog or digital data. Here, the extension pipe 27 is preferably provided with a solenoid valve 29 for opening and closing the extension pipe 27 at regular intervals under the control of the controller 40 to generate pulse air pressure.

In addition, the compressor 30 is connected to the pressure pipe 20, and generates a predetermined air pressure under the control of the controller 40 to the measuring rod 10 through the extension pipe 27 of the pressure pipe 20. Discharge.

In addition, when a command is input from a manager or a preset time arrives, the controller 40 operates the compressor 30 and the solenoid valve 29 to generate pulse air pressure, and the minimum value of the pressures measured by the pressure gauge 22. Alternatively, the value of either the maximum value or the average value is compared with the reference pressure value to measure the powder amount through the storage height of the powdered catalyst and then display it. At this time, the reference pressure value is stored in the catalyst storage tank 151 for each predetermined height (for example, 10 cm units) after storing a predetermined size (for example, 10 cm unit) and injecting a pulse air pressure of a predetermined size, each of the pressure measured in the table form The data is already stored in the memory 41 as data. Here, the controller 40 is provided with a separate display means 43 such as LCD, LED for displaying the powder amount, the powder amount displayed through the display means 43 is to be displayed in volume ratio or mass ratio or height. Can be. In addition, the controller 40 is preferably provided with an operation panel 45 for receiving an administrator command. In addition, the controller 40 may be provided with a pressure value from the compressor 30 in order to maintain a constant pneumatic pressure generated in the compressor 30, and a separate pressure gauge (not shown) on the extension pipe 27 It can also be installed and provided with pressure values.

Hereinafter, the operation of the nitrogen oxide and the powder storage amount measuring device for the dioxin removal device for measuring the powder amount using the pulse air pressure according to the present invention will be described in detail with reference to the accompanying drawings.

First, when the administrator inputs the powder amount measurement command through the operation panel 45 or when the preset reservation time arrives, the controller 40 operates the compressor 30 to generate air pressure. At this time, the controller 40 keeps the pneumatic pressure generated by the compressor 30 constant.

Then, the controller 40 repeats opening and closing the solenoid valve 29 for a predetermined time to generate a pulse air pressure.

Then, the pulsed air pressure is transmitted to the measuring rod 10 through the extension pipe 27, the vertical pipe 25, the adapter 23, and the branch pipe 21, and the air hole 11 of the measuring rod 10. Is discharged through. At this time, if the powdered catalyst is present inside the measuring rod 10 and the periphery of the air hole 11, the air cannot be injected through the air hole 11 and the pressure inside the measuring rod 10 is increased, As the storage height is higher, the pressure inside the measuring rod 10 increases.

On the other hand, the controller 40 receives a pressure value from the pressure gauge 22 installed on each branch pipe 21, and then stores a table previously stored in the memory 41, that is, the reference pressure value and the measured pressure value (minimum value, The maximum value and the average value of either value) are compared, and a height value is acquired from a matching reference pressure value. At this time, when an error between the reference pressure value and the measured pressure value occurs, the height value is obtained from the approximate reference pressure value.

Then, the controller 40 converts the acquired height value into the powder amount corresponding to the volume ratio or the mass ratio, or displays the acquired height through the display means 43 for the administrator to confirm. In this case, the controller 40 may store the powder amount checking history (data including the date, time, powder amount, etc.) in the memory 41. In this case, when the acquired height value is lower than the reference height value, the controller 40 may notify the manager through an alarm means (not shown) such as a warning light or an alarm.

As those skilled in the art would realize, the described embodiments may be modified in various ways, all without departing from the spirit or scope of the present invention. It is to be understood, however, that the present invention is not limited to the specific forms referred to in the description, but rather includes all modifications, equivalents, and substitutions within the spirit and scope of the invention as defined by the appended claims. Should be.

10: measuring rod 20: pressure piping
30: compressor 40: controller

Claims (7)

delete In the powder storage amount measuring device of the nitrogen oxide and dioxin removal device including a catalyst storage tank in which the powdered catalyst is stored,
The powder storage amount measuring device,
A measuring rod formed in a tube shape and having air holes having the same diameter in a longitudinal direction and having a predetermined pattern and vertically installed in the catalyst storage tank;
A pressure pipe connected with the measuring rod and having a pressure gauge installed on the pipe line;
A compressor connected to the pressure pipe and generating pulse air pressure according to an external control to discharge pulse air pressure to the measuring rod through the pressure pipe; And
Nitrogen oxides and dioxins for measuring the amount of powder using a pulsed air pressure, characterized in that the controller is measured and displayed by comparing the pressure measured by the pressure gauge with a predetermined reference pressure value Powder stock measuring device for removal device. The method of claim 2,
The measuring rod,
Powder storage amount measuring device for nitrogen oxide and dioxin removal device for measuring the powder amount by using a pulsed air pressure, characterized in that disposed at the same distance radially with respect to the vertical center line of the catalyst storage tank. The method of claim 3, wherein
The pressure pipe,
A branch pipe one end of which is radially equal in length to the respective measuring rods and is provided with a branch gauge;
An adapter formed in a cylindrical shape and connected to the other end of each branch pipe;
Vertical pipes whose one end is vertically connected to a central portion of the upper surface of the adapter; And
Powder storage measuring device for nitrogen oxide and dioxin removal device for measuring the powder amount by using the pulse air pressure, characterized in that the extension pipe connecting the other end of the vertical pipe and the compressor. The method of claim 4, wherein
In the extension pipe,
And a solenoid valve configured to generate pulse air pressure by intermittently opening and closing the extension pipe under the control of the controller. The method of claim 5, wherein
The reference pressure value is,
Nitrogen for measuring the amount of powder using the pulse air pressure, characterized in that for storing the powder-type catalyst in the catalyst storage tank for each height and injecting a pulse air pressure of a predetermined size to store each measured pressure as a table-type data Powder stock measuring device for oxide and dioxin removal device. The method according to claim 6,
The controller,
It controls the opening and closing of the solenoid valve, compares any one of the minimum value, the maximum value, or the average value among the pressures measured by the pressure gauge of the pressure pipe with the reference pressure value to determine the powder amount through the storage height of the powdered catalyst. Powder storage amount measurement device for nitrogen oxide and dioxin removal device for measuring the amount of powder using a pulse air pressure characterized in that the measurement.

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