CN113959898A - System and method for measuring activity of gypsum slurry - Google Patents

System and method for measuring activity of gypsum slurry Download PDF

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Publication number
CN113959898A
CN113959898A CN202111103001.5A CN202111103001A CN113959898A CN 113959898 A CN113959898 A CN 113959898A CN 202111103001 A CN202111103001 A CN 202111103001A CN 113959898 A CN113959898 A CN 113959898A
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slurry
device body
absorption device
activity
gas
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康秦豪
袁园
贾西部
马强
郭静娟
黄鑫
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China Datang Corp Science and Technology Research Institute Co Ltd
Northwest Electric Power Research Institute of China Datang Corp Science and Technology Research Institute Co Ltd
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China Datang Corp Science and Technology Research Institute Co Ltd
Northwest Electric Power Research Institute of China Datang Corp Science and Technology Research Institute Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N7/00—Analysing materials by measuring the pressure or volume of a gas or vapour
    • G01N7/14—Analysing materials by measuring the pressure or volume of a gas or vapour by allowing the material to emit a gas or vapour, e.g. water vapour, and measuring a pressure or volume difference
    • G01N7/18—Analysing materials by measuring the pressure or volume of a gas or vapour by allowing the material to emit a gas or vapour, e.g. water vapour, and measuring a pressure or volume difference by allowing the material to react
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/80—Semi-solid phase processes, i.e. by using slurries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/40—Alkaline earth metal or magnesium compounds
    • B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/30—Sulfur compounds
    • B01D2257/302—Sulfur oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Biomedical Technology (AREA)
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Abstract

The invention discloses a system and a method for measuring the activity of gypsum slurry, which comprises an absorption device body, a flue gas analyzer, a tail gas absorption bottle, a sulfite analyzer, a pH meter and a clarifier, wherein the top of the absorption device body is provided with a feed pipe, an air inlet pipe and an air outlet pipe; the bottom of the outer wall of the absorption device body is communicated with a slurry discharge pipe, an outlet on the clarifier is respectively communicated with the input ends of the sulfite analyzer and the pH meter, a slurry discharge valve is arranged on the slurry discharge pipe, and a slurry circulating pump is arranged beside the absorption device body. The invention has reasonable structural design, and SO is treated by using gypsum slurry2To determine the absorption capacity of the stoneThe activity of the gypsum slurry is used for representing the quality of the gypsum slurry by using a data index, and a guiding significance is provided for the desulfurization operation.

Description

System and method for measuring activity of gypsum slurry
Technical Field
The invention relates to the technical field of measuring the activity of wet desulphurization gypsum slurry, in particular to a system and a method for measuring the activity of the gypsum slurry.
Background
The limestone-gypsum wet desulphurization process has the characteristics of high desulphurization reaction speed, high desulphurization efficiency, high calcium utilization rate and the like, and is a mainstream process for flue gas desulphurization of large-scale coal-fired power plants. The safety and stability of the desulfurization system are affected by the activity quality of the gypsum slurry. The activity of the gypsum slurry is reduced, the most direct result is that the desulfurization efficiency is reduced, and the slurry of the desulfurization absorption tower is used for treating SO in the flue gas2Can not fully react or absorb, and the flue gas volume is increased along with the increase of the load, thereby easily causing the desulfurization clean flue gas SO2The concentration exceeds the standard, and the pulp supply amount can not be effectively controlled in a short time even being improved. Therefore, the method can know the activity quality of the gypsum slurry in time and has guiding significance for the overall operation stability and environmental index control of the desulfurization system.
At present, no clear definition exists for the activity of the gypsum slurry, but the better the activity of the gypsum slurry is, the more beneficial the operation control is, the more beneficial the improvement of the desulfurization efficiency is, if the activity of the gypsum slurry is regarded as the comprehensive performance index of a wet desulfurization system, the activity mainly relates to the crystallization effect of the gypsum slurry, the purity of the gypsum slurry, the content of liquid-phase soluble salts and the like. Therefore, the key is how to change the activity of the gypsum slurry into a real measurable and datamation index to intuitively judge the comprehensive performance of the slurry.
By the wet desulphurization system SO2Experimental simulations of the absorption process can clearly show that the most direct effect on the activity of a gypsum slurry is the gypsum slurry's contribution toSO in flue gas2The desulfurization absorption tower is in dynamic balance, and the limestone slurry and SO in the flue gas2Continuously enters a desulfurization absorption tower to react, and when the activity of gypsum slurry is reduced, SO is directly expressed as2The limestone slurry is only a small component of the gypsum slurry, and the activity of the limestone slurry cannot completely represent the real condition of the activity of the gypsum slurry in the absorption tower.
Due to the complexity of the desulfurized gypsum slurry, at present, no clear definition exists for the activity of the gypsum slurry, and no research report exists for the activity determination method of the gypsum slurry, and research and technical schemes concentrate on the aspects of measurement of the activity of limestone slurry and monitoring of parameters such as pH, density and the like of the slurry, wherein the activity of the limestone slurry is determined by measuring the solubility curve of limestone by an acid dissolution method and judging the change curve of the pH along with time. The method has problems that the detection time is long, the activity of limestone slurry is not representative for monitoring the quality of the slurry in the absorption tower because the limestone component in the slurry only accounts for a small part, and the slurry activity is difficult to control in time through slurry supply when the slurry activity is reduced because the slurry supply is accompanied by the hysteresis.
Because the quality influence factors of the gypsum slurry are complex, the activity of limestone is not enough to reflect the whole reaction activity of the gypsum slurry; the monitoring of parameters such as pH, density and the like of the slurry has a distorted condition, and the quality of the gypsum slurry in the absorption tower is difficult to truly reflect. To this end, a system and method for measuring the activity of a gypsum slurry is provided.
Disclosure of Invention
It is an object of the present invention to overcome the above-mentioned problems of the prior art and to provide a system and method for measuring the activity of a gypsum slurry by using the gypsum slurry for SO2The activity of the gypsum slurry is judged by introducing SO into the slurry2Standard gas, in the form of tail gas SO2Concentration, absorption of SO2The difference value of the pH value and the sulfite content of the front gypsum slurry and the rear gypsum slurry represents the activity of the slurry, so that the data index is used for representing the quality of the gypsum slurry, and the guiding significance is provided for the desulfurization operation.
In order to achieve the technical purpose and achieve the technical effect, the invention is realized by the following technical scheme:
a system for measuring the activity of gypsum slurry comprises an absorption device body, a flue gas analyzer, a tail gas absorption bottle, a sulfite analyzer, a pH meter and a clarifier, wherein the top of the absorption device body is provided with a feed pipe, an air inlet pipe and an air outlet pipe, and the feed pipe is provided with a feed valve;
the output end of the air inlet pipe extends into the bottom of the inner cavity of the absorption device body, the air inlet pipe is provided with a gas flow controller and an air inlet valve, and the air inlet valve is positioned at the output end of the gas flow controller;
an air outlet valve is arranged on the air outlet pipe, the input end of the flue gas analyzer is communicated with the output end of the air outlet pipe, and a stirrer is arranged in the inner cavity of the absorption device body;
the bottom of the outer wall of the absorption device body is communicated with a slurry discharge pipe, the output end of the slurry discharge pipe is communicated with the input end of a clarifier, the outlet of the clarifier is respectively communicated with the input ends of a sulfite analyzer and a pH meter, and a slurry discharge valve is arranged on the slurry discharge pipe;
the side of the absorption device body is provided with a slurry circulating pump, one end of the slurry circulating pump is communicated with the upper part of the inner cavity of the absorption device body, and the other end of the slurry circulating pump is communicated with the bottom of the inner cavity of the absorption device body.
Preferably, the absorber body is a straight cylindrical container having an aspect ratio of not less than 2.
Based on the technical characteristics, the absorption tower slurry and the SO in the standard gas are convenient to be absorbed2And (4) fully reacting.
Preferably, the outside of the absorption device body is provided with a thermostatic element.
Based on the technical characteristics, the temperature of the serous fluid in the absorption device body is convenient to control and maintain through the thermostatic element.
Preferably, the top of the absorption device body is provided with a pressure gauge, and a sensing end of the pressure gauge extends into the inner cavity of the absorption device body.
Based on above-mentioned technical characteristics, instruct the pressure in the absorbing device body through the manometer, the cooperation is adjusted the admission valve in the intake pipe to rationally control the air input.
Preferably, the clarifier is a filter clarifier or a decanter clarifier.
Based on the technical characteristics, the solid-liquid separation of the slurry is convenient to realize.
Preferably, the output end of the flue gas analyzer is communicated with the bottom of the inner cavity of the tail gas absorption bottle.
Based on the technical characteristics, the tail gas absorption bottle is filled with sufficient alkali liquor SO as to absorb SO in the tail gas2And the poisoning of personnel and environmental pollution are avoided.
Preferably, the agitator is an axial flow agitator.
Based on the technical characteristics, the gas-liquid in the absorption device body is conveniently and uniformly mixed.
A method for measuring the activity of gypsum slurry comprises three operation modes of batch, semi-continuous and continuous measurement methods, which are respectively as follows:
the method I comprises the following steps of measuring the activity of gypsum slurry in an intermittent operation mode: by injecting a fixed amount of slurry into the absorption device body and introducing a fixed amount of SO2The standard gas releases a gas-liquid two-phase sample for detection after the gas-liquid reaction for a certain time;
the second method is a method for measuring the activity of the gypsum slurry in a semi-continuous operation mode: the fixed amount of slurry is injected into the absorption device body, and SO is continuously introduced at a certain flow rate2The standard gas continuously monitors the tail gas through a flue gas analyzer, and after the gas and the slurry absorb and react for a period of time, the slurry is released for detection of a liquid sample;
the third method comprises the following steps of measuring the activity of the gypsum slurry in a continuous operation mode: by continuously injecting slurry into the absorption device body, SO is continuously introduced at a certain flow rate2And absorbing the standard gas, and continuously discharging the slurry and the absorbed tail gas for continuous monitoring.
Compared with the prior art, the invention has the following beneficial effects:
firstly, the method comprises the following steps: by using slurry and SO2The reaction of the standard gas changes the activity of the gypsum slurry into a datamation, real and measurable index, so that the datamation index is used for representing the quality of the gypsum slurry, and a guiding significance is provided for the desulfurization operation.
Secondly, the method comprises the following steps: the device is flexible and adjustable, and can be used for continuous monitoring on site scale and measurement on laboratory scale.
Thirdly, the method comprises the following steps: compared with the activity of limestone, the method has short measurement time for the activity of gypsum, can obtain the activity data of gypsum slurry within 15 minutes, and is convenient for providing more timely and refined regulation and control basis for desulfurization operation.
Fourthly: measurement of gypsum slurry activity helps to prevent total SO of desulfurization caused by decrease in slurry activity2The concentration exceeds the standard.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a use state of the present invention;
in the drawings, the components represented by the respective reference numerals are listed below:
1-constant temperature element, 2-absorption device body, 3-feed valve, 4-feed pipe, 5-gas flow controller, 6-gas inlet valve, 7-gas inlet pipe, 8-pressure gauge, 9-gas outlet pipe, 10-flue gas analyzer, 11-tail gas absorption bottle, 12-sulfite analyzer, 13-pH meter, 14-clarifier, 15-slurry discharge pipe, 16-slurry discharge valve, 17-stirrer, 18-gas outlet valve and 19-slurry circulating pump.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a system for measuring the activity of gypsum slurry comprises an absorption device body 2, a flue gas analyzer 10, a tail gas absorption bottle 11, a sulfite analyzer 12, a pH meter 13 and a clarifier 14, wherein the top of the absorption device body 2 is provided with a feed pipe 4, an air inlet pipe 7 and an air outlet pipe 9, and the feed pipe 4 is provided with a feed valve 3;
the output end of the air inlet pipe 7 extends into the bottom of the inner cavity of the absorption device body 2, the air inlet pipe 7 is provided with an air flow controller 5 and an air inlet valve 6, the air inlet valve 6 is positioned at the output end of the air flow controller 5, and the air flow controller 5 is used for accurately controlling SO introduced into the air inlet pipe 72The flow rate of the standard gas;
an air outlet valve 18 is arranged on the air outlet pipe 9, the input end of the flue gas analyzer 10 is communicated with the output end of the air outlet pipe 9, the output end of the flue gas analyzer 10 is communicated with the bottom of the inner cavity of the tail gas absorption bottle 11, and when the air outlet pipe 9 discharges tail gas, the flue gas analyzer 10 detects SO in the tail gas2The concentration of the alkali liquor is sufficient, and then the alkali liquor is filled in the tail gas absorption bottle 11 SO as to absorb SO in the tail gas2And the poisoning of personnel and environmental pollution are avoided, the inner cavity of the absorption device body 2 is provided with the stirrer 17, the stirrer 17 is an axial-flow stirrer, the gas and liquid in the absorption device body 2 are conveniently and uniformly mixed, the absorption device body 2 is a straight cylindrical container with the height-diameter ratio not less than 2, and the absorption tower slurry and the SO in the standard gas are conveniently led to be in a cylindrical shape2Fully reacting, arranging a constant temperature element 1 outside the absorption device body 2, conveniently controlling and maintaining the temperature of the slurry in the absorption device body 2 through the constant temperature element 1, arranging a pressure gauge 8 on the top of the absorption device body 2, extending the sensing end of the pressure gauge 8 into the inner cavity of the absorption device body 2, indicating the pressure in the absorption device body 2 through the pressure gauge 8,the air inlet valve 6 on the air inlet pipe 7 is adjusted in a matching way to reasonably control the air inflow, and the clarifier 14 is a filtering clarifier or a sedimentation clarifier, so that the solid-liquid separation of the slurry is conveniently realized;
the bottom of the outer wall of the absorption device body 2 is communicated with a slurry discharge pipe 15, the output end of the slurry discharge pipe 15 is communicated with the input end of a clarifier 14, the outlet of the clarifier 14 is respectively communicated with the input ends of a sulfite analyzer 12 and a pH meter 13, clear liquid flows out from the outlet of the clarifier 14 and is respectively sent to the pH meter 13 and the sulfite analyzer 12, the sulfite analyzer 12 is convenient to detect the sulfite concentration of a liquid phase, the pH meter 13 is convenient to detect the pH value of the liquid phase, and a slurry discharge valve 16 is arranged on the slurry discharge pipe 15;
the side of the absorption device body 2 is provided with a slurry circulating pump 19, one end of the slurry circulating pump 19 is communicated with the upper part of the inner cavity of the absorption device body 2, and the other end of the slurry circulating pump 19 is communicated with the bottom of the inner cavity of the absorption device body 2.
A method for measuring the activity of gypsum slurry comprises three operation modes of batch, semi-continuous and continuous measurement methods, which are respectively as follows:
example 1
The method for measuring the activity of the gypsum slurry in the intermittent operation mode comprises the following steps: by injecting a fixed amount of slurry into the absorption device body 2 and introducing a fixed amount of SO2And (3) standard gas, namely, after the gas and the liquid react for a certain time, a gas-liquid two-phase sample is released for detection. The specific operation mode is as follows:
first, the slurry discharge valve 16 is closed to ensure that the slurry in the absorber main body 2 does not leak; subsequently, opening the gas outlet valve 18 and the feed valve 3, injecting a certain volume of the slurry into the absorption device body 2 through the feed pipe 4, ensuring that the injected slurry volume is not more than half of the volume of the absorption device body 2, and then closing the feed valve 3 and the gas outlet valve 18; then, the gas inlet valve 6 is opened, and a fixed amount of SO is introduced into the bottom of the slurry along the gas inlet pipe 7 by the action of the gas flow controller 52Marking gas, closing the air inlet valve 6, opening the stirrer 17 and the slurry circulating pump 19, stirring through the stirrer 17, and absorbing the inner part of the device 2 through the slurry circulating pump 19Circulating to make the slurry and SO2Fully contacting, reacting and absorbing; provide the constant temperature environment for absorbing device through thermostatic element 1, measure the pressure in the absorbing device body 2 through manometer 8, after the reaction, close agitator 17 and slurry circulating pump 19, slowly open gas outlet valve 18, tail gas is sent to flue gas analyzer 10 through outlet duct 9, reads the SO in the tail gas from flue gas analyzer 102The concentration, tail gas is discharged after being absorbed by a tail gas absorption bottle 11; after the pressure gauge 8 shows that the pressure is recovered to be normal, the slurry discharge valve 16 is opened, the slurry is discharged along the slurry discharge pipe 15, the slurry is clarified by the clarifier 14, and then clear liquid automatically flows into the sulfite analyzer 12 and the pH meter 13 to detect the sulfite concentration and the pH value in the liquid phase.
Example 2
Method for measuring the activity of gypsum slurry in semi-continuous operation mode: SO is continuously introduced at a constant flow rate by injecting a fixed amount of the slurry into the absorption apparatus body 22And the standard gas continuously monitors the tail gas through the flue gas analyzer 10, and after the gas and the serous fluid absorb and react for a period of time, the serous fluid is released to detect the liquid sample. The specific operation mode is as follows:
first, the slurry discharge valve 16 is closed to ensure that the slurry in the absorber main body 2 does not leak; then, the feed valve 3 is opened, a certain volume of slurry is injected into the absorption device body 2 through the feed pipe 4, the injected slurry volume is ensured to be not more than half of the volume of the absorption device body 2, then the feed valve 3 is closed, and the slurry circulating pump 19 is opened; then, the gas inlet valve 6 and the gas outlet valve 18 are opened, and SO with a certain concentration is continuously introduced to the bottom of the slurry along the gas inlet pipe 7 under the action of the gas flow controller 52Marking gas and recording flow and ventilation time; the tail gas after the absorption reaction is discharged through an air outlet pipe 9 and sent to a flue gas analyzer 10, and SO in the tail gas is read from the flue gas analyzer 102After the concentration is stabilized, the tail gas is absorbed by a tail gas absorption bottle 11 and then is discharged; after the reaction is finished, the slurry discharge valve 16 is opened, the slurry is discharged into the clarifier 14 along the slurry discharge pipe 15 for clarification, and clear liquid automatically flows into the sulfate analyzer 12 and the pH meter 13, so that the sulfite concentration and the pH value in the liquid phase are detected.
Example 3
Method for measuring the activity of gypsum slurry in continuous operation mode: SO is continuously introduced into the absorption device body 2 at a constant flow rate by continuously injecting slurry into the absorption device body2And absorbing the standard gas, and continuously discharging the slurry and the absorbed tail gas for continuous monitoring. The specific operation mode is as follows:
first, it is ensured that the air inlet valve 6 and the air outlet valve 7 are opened, and then the slurry discharge valve 16 is closed; then, the feeding valve 3 is opened, the slurry is injected into the absorption device body 2 along the feeding pipe 4, after a certain volume of slurry is injected, the slurry discharging valve 16 is opened, the slurry flows out smoothly, the opening degree of the valve is controlled, and the balance of the liquid level of the slurry is ensured; then, the gas inlet valve 6 and the gas outlet valve 18 are opened, and SO with a certain concentration is continuously introduced to the bottom of the slurry along the gas inlet pipe 7 under the action of the gas flow controller 52Marking gas and recording flow and ventilation time; the tail gas after absorption reaction is discharged through an air outlet pipe 9 and sent to a flue gas analyzer 10, and SO in the tail gas is read and continuously recorded2The concentration is indicated, and the tail gas is absorbed by a tail gas absorption bottle 11 and then discharged; at the same time, the discharged slurry is discharged into a clarifier 14 along a slurry discharge pipe 15 for clarification, and the clear liquid flows into a sulfate analyzer 12 and a pH meter 13 from the clarifier to detect the sulfite concentration and the pH value in the liquid phase.
The three operation modes are all through tail gas SO2Concentration, absorption of SO2The pH value change of the gypsum slurry and the concentration difference of sulfite before and after the gypsum slurry characterize the activity of the slurry; the higher the activity, the tail gas SO2The lower the concentration and the larger the reduction amplitude of the pH value, the larger the concentration difference of the liquid-phase sulfite is, the better the activity of the slurry is, thus achieving the purpose of representing the quality of the gypsum slurry by using a data index and providing a guiding significance for the desulfurization operation.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims (8)

1. The utility model provides a measure active system of gypsum thick liquid, includes absorbing device body (2), flue gas analysis appearance (10), tail gas absorption bottle (11), sulfite analysis appearance (12), pH meter (13) and clarifier (14), its characterized in that: a feeding pipe (4), an air inlet pipe (7) and an air outlet pipe (9) are arranged at the top of the absorption device body (2), and a feeding valve (3) is arranged on the feeding pipe (4);
the output end of the air inlet pipe (7) extends into the bottom of the inner cavity of the absorption device body (2), the air inlet pipe (7) is provided with a gas flow controller (5) and an air inlet valve (6), and the air inlet valve (6) is positioned at the output end of the gas flow controller (5);
an air outlet valve (18) is arranged on the air outlet pipe (9), the input end of the flue gas analyzer (10) is communicated with the output end of the air outlet pipe (9), and a stirrer (17) is arranged in the inner cavity of the absorption device body (2);
the bottom of the outer wall of the absorption device body (2) is communicated with a slurry discharge pipe (15), the output end of the slurry discharge pipe (15) is communicated with the input end of a clarifier (14), the outlet of the clarifier (14) is respectively communicated with the input ends of a sulfite analyzer (12) and a pH meter (13), and the slurry discharge pipe (15) is provided with a slurry discharge valve (16);
a slurry circulating pump (19) is arranged beside the absorption device body (2), one end of the slurry circulating pump (19) is communicated with the upper part of the inner cavity of the absorption device body (2), and the other end of the slurry circulating pump (19) is communicated with the bottom of the inner cavity of the absorption device body (2).
2. A system for measuring the activity of a gypsum slurry as set forth in claim 1, wherein: the absorption device body (2) is a straight cylindrical container with the height-diameter ratio not less than 2.
3. A system for measuring the activity of a gypsum slurry as set forth in claim 1, wherein: the outside of the absorption device body (2) is provided with a constant temperature element (1).
4. A system for measuring the activity of a gypsum slurry as set forth in claim 1, wherein: the top of the absorption device body (2) is provided with a pressure gauge (8), and the sensing end of the pressure gauge (8) extends into the inner cavity of the absorption device body (2).
5. A system for measuring the activity of a gypsum slurry as set forth in claim 1, wherein: the clarifier (14) is a filter clarifier or a sedimentation clarifier.
6. A system for measuring the activity of a gypsum slurry as set forth in claim 1, wherein: the output end of the flue gas analyzer (10) is communicated with the bottom of the inner cavity of the tail gas absorption bottle (11).
7. A system for measuring the activity of a gypsum slurry as set forth in claim 1, wherein: the stirrer (17) is an axial flow stirrer.
8. A method of measuring the activity of a gypsum slurry, comprising: the measuring method comprises three operation modes of intermittent operation, semi-continuous operation and continuous operation, which are respectively as follows:
the method I comprises the following steps of measuring the activity of gypsum slurry in an intermittent operation mode: by injecting a fixed amount of slurry into the absorption device body (2) and introducing a fixed amount of SO2Standard gas, gas-liquid generation is definiteAfter the reaction, releasing a gas-liquid two-phase sample for detection;
the second method is a method for measuring the activity of the gypsum slurry in a semi-continuous operation mode: by injecting a fixed amount of slurry into the absorption device body (2), SO is continuously introduced at a constant flow rate2The standard gas continuously monitors the tail gas through a flue gas analyzer (10), and after the gas and the serous fluid absorb and react for a period of time, the serous fluid is released for detecting the liquid sample;
the third method comprises the following steps of measuring the activity of the gypsum slurry in a continuous operation mode: by continuously injecting slurry into the absorption device body (2), SO is continuously introduced at a certain flow rate2And absorbing the standard gas, and continuously discharging the slurry and the absorbed tail gas for continuous monitoring.
CN202111103001.5A 2021-09-18 2021-09-18 System and method for measuring activity of gypsum slurry Pending CN113959898A (en)

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