A lime slurry dilution tank with an online concentration measurement device

Abstract

A lime slurry dilution tank with an online concentration measuring device. Due to the addition of the online concentration measuring device, the online concentration measuring device includes a measuring barrel, which is mounted and fixed on the outer wall of the dilution tank body; a liquid inlet pipe and a liquid outlet pipe are arranged at the bottom of the measuring barrel, one end of the liquid inlet pipe is connected to the dilution tank body and the other end is connected to the measuring barrel, one end of the liquid outlet pipe is connected to the measuring barrel and the other end is connected to a ditch, a first solenoid valve is arranged on the liquid inlet pipe, and a second solenoid valve is arranged on the liquid outlet pipe, and the liquid inlet and liquid discharge of the measuring barrel are respectively controlled by the first solenoid valve and the second solenoid valve; a float-type hydrometer is also arranged, a lightweight shading plate is arranged on the top of the float-type hydrometer, and a pulse-type distance meter is also arranged on the top of the measuring barrel, and the height of the lightweight shading plate is measured by the pulse-type distance meter to measure and calculate the density of the lime slurry online and then calculate the concentration of the lime slurry.

Description

Technical Field

[0001] The invention relates to a concentration measuring device for a lime slurry dilution tank, in particular to a lime slurry dilution tank with an online concentration measuring device. Background Art

[0002] At present, the semi-dry deacidification method in the flue gas purification system often relies on measuring the lime slurry concentration in the lime slurry dilution tank to balance the flue gas treatment effect and the amount of lime used when controlling the flue gas treatment effect. The traditional method of measuring the lime slurry concentration is to take a sample from the dilution tank, measure it with a thermometer and a density meter, and comprehensively calculate the lime slurry concentration; or use a chemical titration experiment method. The above method is time-consuming and labor-intensive, increases safety risks, and cannot achieve real-time monitoring, making it very inflexible to implement. Summary of the invention

[0003] In order to overcome the problems existing in the prior art, the patent of the present invention proposes a lime slurry dilution tank with an online concentration measuring device. Due to the addition of the online concentration measuring device, the concentration of the lime slurry can be measured online by obtaining the temperature and density of the lime slurry online, thereby effectively solving the problems of the prior art.

[0004] The technical solution adopted by the present invention to solve its technical problem is: a lime slurry dilution tank with an online concentration measuring device, comprising a dilution tank body, a stirring pump and a thermometer sensor for measuring the temperature of the lime slurry in the dilution tank body, characterized in that an online concentration measuring device is also provided, the online concentration measuring device comprises a measuring barrel, the measuring barrel is fixedly mounted on the outer wall of the dilution tank body; a liquid inlet pipe and a liquid outlet pipe are provided at the bottom of the measuring barrel, one end of the liquid inlet pipe is connected to the dilution tank body and the other end is connected to the measuring barrel, one end of the liquid outlet pipe is connected to the measuring barrel, and one end of the liquid outlet pipe is connected to the measuring barrel. A barrel is connected and the other end is connected to a ditch, a first solenoid valve is arranged on the liquid inlet pipe, and a second solenoid valve is arranged on the liquid outlet pipe, and the liquid inlet and liquid discharge of the measuring barrel are controlled by the first solenoid valve and the second solenoid valve respectively; a float-type hydrometer is also arranged, a lightweight shading plate is arranged on the top of the float-type hydrometer, and a pulse-type distance meter is also arranged on the top of the measuring barrel, the height of the lightweight shading plate is measured by the pulse-type distance meter, so as to measure and calculate the specific gravity (density) of the lime slurry online, and the temperature and specific gravity of the lime slurry are obtained online to achieve online measurement of the concentration of the lime slurry.

[0005] In a preferred embodiment, a float type liquid level gauge is further provided, and the float type liquid level gauge is used to control the first solenoid valve.

[0006] In a preferred embodiment, an overflow pipe is further provided, one end of which is connected to the upper part of the measuring barrel and the other end of which is connected to the pipeline behind the second solenoid valve.

[0007] The beneficial effects of the present invention are as follows: the present invention proposes a lime slurry dilution tank with an online concentration measuring device. Due to the addition of the online concentration measuring device, the online concentration measuring device includes a measuring barrel, which is mounted and fixed on the outer wall of the dilution tank body; a liquid inlet pipe and a liquid outlet pipe are arranged at the bottom of the measuring barrel, one end of the liquid inlet pipe is connected to the dilution tank body and the other end is connected to the measuring barrel, one end of the liquid outlet pipe is connected to the measuring barrel and the other end is connected to the ditch, a first solenoid valve is arranged on the liquid inlet pipe, and a second solenoid valve is arranged on the liquid outlet pipe, and the liquid inlet and liquid discharge of the measuring barrel are respectively controlled by the first solenoid valve and the second solenoid valve; a float-type hydrometer is also arranged, a lightweight shading plate is arranged on the top of the float-type hydrometer, and a pulse-type distance meter is also arranged on the top of the measuring barrel, the height of the lightweight shading plate is measured by the pulse-type distance meter to measure and calculate the density of the lime slurry online, and the concentration of the lime slurry is measured online by obtaining the temperature and density of the lime slurry online, thereby effectively solving the problems of the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1-Figure 2 It is a schematic diagram of the structure of the first embodiment of the present invention, wherein: Figure 1 As an overall schematic diagram, Figure 2 This is an enlarged schematic diagram of the local structure.

[0009] Figure 3 It is a schematic diagram of the enlarged local structure of the second embodiment of the present invention.

[0010] In the figure,

[0011] 1. Dilution tank body, 1.1 Dilution tank liquid level,

[0012] 2. Mixing pump,

[0013] 3. Thermometer sensor,

[0014] 4. Online concentration measuring device, 4.1 measuring barrel, 4.21 liquid inlet pipe, 4.22 liquid outlet pipe, 4.21A first solenoid valve, 4.22A second solenoid valve, 4.3 float type liquid level gauge, 4.4 float type hydrometer, 4.4A light light shielding plate, 4.5 pulse distance meter, 4.6 measuring barrel liquid level, 4.7 fixed bracket, 4.8 overflow pipe. DETAILED DESCRIPTION

[0015] Figure 1-Figure 2 It is a schematic diagram of the structure of the first embodiment of the present invention, wherein: Figure 1 As an overall schematic diagram, Figure 2 This is an enlarged schematic diagram of the local structure.

[0016] The figure shows that in this example, a lime slurry dilution tank with an online concentration measuring device includes a dilution tank body, a stirring pump and a thermometer sensor for measuring the temperature of the lime slurry in the dilution tank body, wherein an online concentration measuring device is also provided, and the online concentration measuring device includes a measuring barrel, and the measuring barrel is fixedly mounted on the outer wall of the dilution tank body; a liquid inlet pipe and a liquid outlet pipe are provided at the bottom of the measuring barrel, one end of the liquid inlet pipe is connected to the dilution tank body and the other end is connected to the measuring barrel, and one end of the liquid outlet pipe is connected to the measuring barrel The other end is connected to the ditch, and a first solenoid valve is arranged on the liquid inlet pipe, and a second solenoid valve is arranged on the liquid outlet pipe. The first solenoid valve and the second solenoid valve are used to control the liquid inlet and liquid discharge of the measuring barrel respectively; a float-type hydrometer is also arranged, and a lightweight shading plate is arranged on the top of the float-type hydrometer. A pulse-type distance meter is also arranged on the top of the measuring barrel. The height of the lightweight shading plate is measured by the pulse-type distance meter, so as to measure and calculate the density of the lime slurry online, and the temperature and density of the lime slurry are obtained online to achieve online measurement of the concentration of the lime slurry.

[0017] The figure shows that when the measurement starts, the second solenoid valve 4.22A is closed, and the first solenoid valve 4.21A is opened to add lime slurry to the measuring barrel 4.1. When the liquid level measured by the float-type liquid level gauge 4.3 in the measuring barrel 4.1 reaches a certain height, the first solenoid valve 4.21A is closed, and the liquid level of the lime slurry in the measuring barrel 4.1 is at a set height. At this time, the float-type hydrometer 4.4 floats up, and the pulse-type rangefinder 4.5 measures the distance to the light light shielding plate 4.4A and transmits the data to the computer. This distance can calculate the height of the float-type hydrometer 4.4 in the lime slurry, thereby calculating the specific gravity of the lime slurry online. The temperature sensor 3 transmits the data online to the computer, and the concentration of the lime slurry is measured online by obtaining the temperature and specific gravity of the lime slurry online. When the measurement is completed, the second solenoid valve is controlled to open to discharge the lime slurry into the ditch.

[0018] Figure 3This is a schematic diagram of the partial structure of the second embodiment of the present invention. The figure shows that, unlike the first embodiment, in this example, a float-type liquid level gauge 4.3 is not provided. Instead, an overflow pipe 4.8 is provided, one end of which is connected to the upper part of the measuring barrel 4.1 and the other end is connected to the pipeline behind the second electromagnetic valve 4.22A. In this example, at the beginning of the measurement, the second electromagnetic valve 4.22A is closed, and the first electromagnetic valve 4.21A is opened to add lime slurry to the measuring barrel 4.1. The liquid level of the lime slurry in the measuring barrel 4.1 rises. When the liquid level in the measuring barrel 4.1 reaches the overflow port (the entrance of the overflow pipe 4.8), the subsequent added lime slurry is discharged from the overflow pipe 4.8 into the ditch, and the liquid level in the measuring barrel 4.1 is always at the set height. In a specific implementation, the time required for the first electromagnetic valve 4.21A to overflow from opening to overflow of the lime slurry can be measured through actual operation, and 10 seconds can be added as a redundancy on this basis. This is used as the set time for the first electromagnetic valve 4.21A to open to replenish lime slurry in the measuring barrel 4.1. When the set time is reached, the first electromagnetic valve 4.21A automatically closes.

[0019] Different from the prior art, the present invention proposes a lime slurry dilution tank with an online concentration measuring device, which can obtain the temperature and specific gravity of the lime slurry online, thereby realizing online measurement of the concentration of the lime slurry and improving operation efficiency.

Claims

1. A lime slurry dilution tank with an online concentration measuring device, comprising a dilution tank body, a stirring pump and a thermometer sensor for measuring the temperature of the lime slurry in the dilution tank body, characterized in that: An online concentration measuring device is also provided, which includes a measuring barrel, which is fixedly mounted on the outer wall of the dilution tank body; a liquid inlet pipe and a liquid outlet pipe are provided at the bottom of the measuring barrel, one end of the liquid inlet pipe is connected to the dilution tank body and the other end is connected to the measuring barrel, one end of the liquid outlet pipe is connected to the measuring barrel and the other end is connected to the ditch, a first solenoid valve is provided on the liquid inlet pipe, and a second solenoid valve is provided on the liquid outlet pipe, and the first solenoid valve and the second solenoid valve are used to control the liquid inlet and liquid discharge of the measuring barrel respectively; a float-type hydrometer is also provided, a lightweight shading plate is provided on the top of the float-type hydrometer, and a pulse-type distance meter is also provided on the top of the measuring barrel, and the height of the lightweight shading plate is measured by the pulse-type distance meter to measure and calculate the specific gravity of the lime slurry online, and the concentration of the lime slurry is measured online by obtaining the temperature and specific gravity of the lime slurry online; A float type liquid level gauge is also provided, and the float type liquid level gauge is used to control the first electromagnetic valve; an overflow pipe is also provided, and one end of the overflow pipe is connected to the upper part of the measuring bucket and the other end is connected to the pipeline behind the second electromagnetic valve.

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