CN113588310A - Flue gas moisture recovery experimental apparatus that ring type was arranged - Google Patents
Flue gas moisture recovery experimental apparatus that ring type was arranged Download PDFInfo
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- CN113588310A CN113588310A CN202110872715.6A CN202110872715A CN113588310A CN 113588310 A CN113588310 A CN 113588310A CN 202110872715 A CN202110872715 A CN 202110872715A CN 113588310 A CN113588310 A CN 113588310A
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 94
- 239000003546 flue gas Substances 0.000 title claims abstract description 94
- 238000011084 recovery Methods 0.000 title claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 368
- 238000005070 sampling Methods 0.000 claims abstract description 31
- 239000007921 spray Substances 0.000 claims abstract description 26
- 238000005507 spraying Methods 0.000 claims description 43
- 238000004891 communication Methods 0.000 claims description 16
- 239000013589 supplement Substances 0.000 claims description 10
- 230000008676 import Effects 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 9
- 238000010276 construction Methods 0.000 abstract description 7
- 238000009434 installation Methods 0.000 abstract description 6
- 239000000779 smoke Substances 0.000 description 17
- 238000005259 measurement Methods 0.000 description 11
- 239000003245 coal Substances 0.000 description 9
- 238000012360 testing method Methods 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000011160 research Methods 0.000 description 5
- 238000007599 discharging Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000001502 supplementing effect Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 230000003009 desulfurizing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 206010022000 influenza Diseases 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000003077 lignite Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000009972 noncorrosive effect Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000013014 water-saving technology Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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- G01M99/005—Testing of complete machines, e.g. washing-machines or mobile phones
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention discloses a circularly arranged flue gas moisture recovery experimental device, which comprises a first horizontal flue, a first vertical flue, a second horizontal flue, a second vertical flue, a third horizontal flue, a third vertical flue, a first heater, a circulating fan, a second heater, a third heater, a circulating fan outlet flue gas sampling and measuring port, a primary spray device, a secondary spray device, a water taking heat exchanger inlet sampling and measuring port, a water taking heat exchanger outlet sampling and measuring port, a primary spray device lower water collecting tank, a secondary spray device lower water collecting tank, a water taking heat exchanger lower water collecting tank, a first water collecting tank water outlet, a third water collecting tank water inlet, a third water collecting tank, a fourth water collecting tank water outlet, a second water collecting tank, a connecting pipeline, a valve, a radiator and a flowmeter The anti-interference capability is strong, the installation and the operation are convenient, the construction cost is low and the maintenance amount is small.
Description
Technical Field
The invention belongs to the field of thermal power generation equipment, and relates to a flue gas moisture recovery experimental device in annular arrangement.
Background
At present, the coal-fired generator set is the main force of power supply in China and is also the key point for saving energy, treating coal-fired pollution and solving environmental problems. Most of large coal and electricity bases in China are located in northern arid areas with 'more coal and water shortage', and reduction of water resource consumption by adopting a flue gas water recovery technology of a coal-fired generator set is the most urgent problem facing at present. For the coal-fired generating set in the arid water-deficient area, although the water consumption of the coal-fired generating set is reduced by adopting water-saving technologies such as air cooling, dry slag discharging and the like, the water consumption in the power generation process is still high.
The coal-fired generating set has large smoke volume and high water content of smoke, and particularly for a unit burning high-moisture lignite, the direct emission of wet smoke not only consumes a large amount of water resources, but also causes 'white smoke' visual pollution, and is highly concerned by the social public. The coal-fired power plant can greatly reduce the emission of wet flue gas moisture of the coal-fired power generating set by additionally arranging the flue gas moisture recovery device, is one of the key directions of water saving and consumption reduction of the coal-fired power plant, is urgent social requirements of water resource utilization and environmental protection control, and has important significance for building an environment-friendly and resource-saving society in China.
At present, the flue gas moisture recovery technology is researched by multiple colleges and universities and scientific research institutions in China, and in order to ensure the pertinence and the accuracy of research results, a flue gas moisture recovery experimental device is generally arranged on a flue of a power station boiler provided with the flue gas moisture recovery device, so that the following five problems exist:
(1) the water content in the flue gas fluctuates greatly under the influence of the water fluctuation of the boiler fire coal, and the accuracy of the test result is greatly influenced. The moisture in the boiler flue gas is influenced by the moisture in the air on one hand, and is influenced by the moisture in the coal of the power plant on the other hand, and the moisture of the coal is the main influence factor. The coal quality is changed frequently, and the fluctuation of the water content of the coal is large, so that the fluctuation of the water content in the boiler flue gas is frequent, the influence on the water intake quantity of the water intake test device is obvious, and the test measurement precision is influenced.
(2) The influence of unit load fluctuation greatly influences the moisture content and the temperature of the flue gas, and therefore the measurement precision is influenced. Along with the increase of the installed capacity of new energy power generation such as wind power, solar energy, biomass energy and the like, the load of a boiler fluctuates greatly, and the coal burning quantity and the flue gas temperature fluctuate, so that the flue gas temperature, the flue gas water content and the flue gas quantity change irregularly, the boundary condition of the flue gas water taking test device changes irregularly, and the measurement precision of the test device is influenced.
(3) Test bed installation and operation limitation
In order to meet the requirements of safe and stable operation and water intake quality of the moisture recovery device and avoid the influence of dust, NOx and SOx in the flue gas, the moisture recovery device is generally arranged between a desulfurizing tower and a chimney, and the flue gas is purified after denitrification and desulfurization. According to the conventional layout of the power station boiler flue, the section of flue is arranged in a suspended mode, the height of the section of flue is 3-15 meters, the number of elbows is relatively large, a moisture recovery experimental device needs to be installed in the area, the space occupied by the flue of the experiment table, a water pipeline, a fan and a control system is large, and the site condition is severely limited. The operation of the experiment table is greatly influenced by the operation mode of the unit, and the experiment device cannot normally operate when the unit stops.
(4) High construction cost
In order to meet the requirements of safe and stable operation and water intake quality of the water recovery device, the water recovery experimental device is generally installed between a desulfurizing tower and a chimney, the section of the flue is arranged in a suspension mode according to the conventional layout of the flue of a power station boiler, the height of the section of the flue is 3-15 meters, when the water intake experimental device is installed, the flue, a boiler smoke fan and a water pipeline need to be supported or fixed, a house needs to be built independently, the water intake experimental device is used for placing and experiment sites of an experiment electric control system, and therefore the construction cost of the water intake experimental device is very high.
(5) Large maintenance amount
After the installation of water intaking experimental apparatus is accomplished, the exit of system all is connected with the power plant flue, in order to guarantee the system tightness, during the device is out of service, exit must be isolated with gate and power plant flue, when separating never tight, very easily lead to the flue gas to leak into moisture recovery unit and take place the condensation, produce harmful effects to system's equipment, also easily take place the flue gas simultaneously and leak, cause the scene to run and leak and environmental pollution, and the system is equipped with a great deal of electrical equipment, need periodic inspection and operation, the availability ratio of system has been guaranteed. And therefore the system maintenance is heavy.
To sum up, the flue gas moisture recovery experimental device installed on the power station boiler at present has the problems of urgent solution and optimization in the aspects of measurement accuracy, anti-interference capability, installation and operation conditions, construction investment and maintenance amount. Therefore, a brand-new flue gas moisture recovery experimental device needs to be designed, and the experimental device for carrying out research work on flue gas moisture recovery of the power station boiler is satisfied.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a circularly arranged flue gas moisture recovery experimental device which has the characteristics of accurate measurement, strong anti-interference capability, convenient installation and operation, low construction cost and small maintenance amount.
In order to achieve the aim, the circularly-arranged flue gas moisture recovery experimental device comprises a first horizontal flue, a first vertical flue, a second horizontal flue, a second vertical flue, a third horizontal flue, a third vertical flue, a first heater, a circulating fan, a second heater, a third heater, a flue gas sampling and measuring port at the outlet of the circulating fan, a primary spraying device, a secondary spraying device, a water intake heat exchanger inlet sampling and measuring port and a water intake heat exchanger, the system comprises a sampling and measuring port at an outlet of a water taking heat exchanger, a lower water collecting tank of a primary spraying device, a lower water collecting tank of a secondary spraying device, a lower water collecting tank of the water taking heat exchanger, a first water collecting tank, a water outlet of the first water collecting tank, a water inlet of a third water collecting tank, the third water collecting tank, a fourth water collecting tank, a water outlet of the fourth water collecting tank, a second water collecting tank, a connecting pipeline, a valve, a radiator and a flowmeter;
an outlet of the first horizontal flue is communicated with an inlet of the first horizontal flue through a first vertical flue, a second horizontal flue, a second vertical flue, a third horizontal flue and a third vertical flue in sequence;
the first heater, the circulating fan, the second heater, the third heater and a smoke sampling and measuring port at the outlet of the circulating fan are sequentially arranged on the first horizontal flue along the smoke flowing direction; the first-stage spraying device is arranged on the first vertical flue, and the second-stage spraying device is arranged on the second vertical flue; the water taking heat exchanger inlet sampling and measuring port, the water taking heat exchanger and the water taking heat exchanger outlet sampling and measuring port are sequentially arranged on the third horizontal flue along the flow direction of flue gas;
the lower water collecting tank of the first-stage spraying device is arranged right below the first vertical flue, the lower water collecting tank of the second-stage spraying device is arranged right below the second vertical flue, and the lower water collecting tank of the water taking heat exchanger is arranged right below the water taking heat exchanger;
the outlet of the lower water collecting tank of the primary spraying device is communicated with a third water collecting tank through a first water collecting tank, a water outlet of the first water collecting tank and a water inlet of the third water collecting tank;
the water outlet of the water taking heat exchanger is communicated with the water inlet of the water taking heat exchanger through a connecting pipeline, a valve, a radiator and a flowmeter;
the device also comprises a first-stage demister, a second-stage demister, a third-stage demister and a fourth-stage demister;
the primary spraying device and the primary demister are sequentially arranged on the first vertical flue along the flow direction of flue gas;
the secondary spraying device and the secondary demister are sequentially arranged on the second vertical flue along the flow direction of flue gas;
tertiary defroster, water intaking heat exchanger import sample and measurement mouth, water intaking heat exchanger, level four defroster and water intaking heat exchanger export sample and measurement mouth arrange in proper order on third horizontal flue along flue gas flow direction.
The circulating fan also comprises an inlet air supplement port of the circulating fan; and an inlet air supplement port of the circulating fan is arranged on the third vertical flue.
The outlet of the third water collecting tank is communicated with the water inlet of the first-stage spraying device and the water inlet of the second-stage spraying device through a spray water pump and the second water collecting tank.
The first water collecting tank is provided with a first water collecting tank water outlet; a fourth water collecting tank water outlet is formed in the fourth water collecting tank, and a third water collecting tank water replenishing port is formed in the third water collecting tank;
the water collecting device also comprises a fifth water collecting tank; an outlet of the lower water collecting tank of the water taking heat exchanger is communicated with an inlet of a fifth water collecting tank, and a fifth water collecting tank water outlet is formed in the fifth water collecting tank;
the water outlet of the water taking heat exchanger is communicated with the water inlet of the water taking heat exchanger through the outlet header of the water taking heat exchanger, a connecting pipeline, a valve, a circulating water pump of the water taking heat exchanger, a radiator, a flowmeter and an inlet header of the water taking heat exchanger.
A water inlet of the water taking heat exchanger is arranged on the connecting pipeline;
and a water outlet of the water taking heat exchanger is arranged on a pipeline between the circulating water pump of the water taking heat exchanger and the radiator.
Guide plates are arranged at the communication position of the first horizontal flue and the first vertical flue, the communication position of the first vertical flue and the second horizontal flue, the communication position of the second vertical flue and the third horizontal flue, the communication position of the third horizontal flue and the third vertical flue and the communication position of the third vertical flue and the first horizontal flue.
The outer surfaces of the first horizontal flue, the first vertical flue, the second horizontal flue, the second vertical flue, the third horizontal flue and the third vertical flue are all provided with heat preservation layers.
The invention has the following beneficial effects:
when the circularly-arranged flue gas moisture recovery experimental device is operated specifically, flue gas is heated step by step through the first heater, the second heater and the third heater, a flexible heating heat source is provided for a system, spray water is recovered through the lower water collecting tank of the first-stage spraying device and the lower water collecting tank of the second-stage spraying device, and the flue gas is sprayed in multiple stages through the first-stage spraying device and the second-stage spraying device, so that flexible and adjustable moisture content is provided for the flue gas; the circulating water in the water taking heat exchanger is provided with closed water circulation and temperature regulation, and circulating media with different temperatures and flows can be provided for the water taking heat exchanger; the water intake heat exchanger inlet and outlet flues are provided with flue gas sampling and measuring ports, so that flue gas parameters and the device running state can be monitored in real time; in addition, power is provided for the flue gas system through the circulating fan. In addition, the invention can furthest ensure the heat and the moisture in the flue gas to be recycled, achieve the purposes of energy saving and water saving, simultaneously can furthest reduce the system noise, improve the experimental working conditions, and compared with the common flue gas moisture recovery experimental device arranged on the flue of the power station boiler, the invention has the following advantages:
1) the ring type arrangement mode can ensure the heat and moisture in the flue gas to be recycled to the maximum extent, achieve the purposes of energy saving and water saving, reduce the system noise to the maximum extent and improve the experimental working conditions;
2) the measurement accuracy is high. The smoke of the device is supplemented from the outside of the system, the smoke components are adjustable and stable, but the supplement amount of the smoke is small after the system operates normally; the smoke components, the smoke quantity, the smoke temperature and the working medium flow of each pipeline can be accurately controlled and adjusted; a flue gas sampling port and a measuring point are uniformly distributed on an inlet flue and an outlet flue of the water taking heat exchanger, and a main pipeline is provided with a flowmeter; the above factors can ensure the measurement accuracy of the device.
3) The measurement flexibility is strong, each heater can adopt electricity, high-temperature steam and the like as heat sources, and the flue gas temperature in the device can be accurately controlled through the power of the heater; the flue gas amount can be accurately adjusted through the rotating speed of the circulating fan; the flue gas moisture can be accurately adjusted through the number of spraying layers and the water quantity, the temperature of working media in the water taking heat exchanger can be controlled through a radiator which is independently arranged, and the flow can be adjusted through a circulating water pump of the water taking heat exchanger; the water taking heat exchanger can be quickly disassembled, so that the heat exchangers of different pipes and arrangement modes can be conveniently replaced; each main pipeline is equipped with a flowmeter and a valve, working medium parameters of each pipeline can be flexibly adjusted, the device can independently operate, and cannot be influenced by load fluctuation of a power station boiler, coal quality fluctuation, system outage and the like, the anti-interference capability is strong, and the operation mode is free and flexible.
4) The construction cost is low. The main components of the device, such as the circulating fan, the heater, the water pump, the demister, the valve 41, the pipeline and the like, operate under the conditions of normal pressure and non-corrosive flue gas atmosphere, and the power of the circulating fan and the water pump is small, so the purchase cost of equipment is low; all parts in the device can be arranged on the ground, and the device is light in weight, so that the installation cost is low; the device takes electricity or high-temperature steam as a heating source of the system, the system runs clean environment-friendly equipment, and the investment cost is low.
5) The operation cost is low. The device takes electricity or high-temperature steam as a system heating heat source, the heat of the system is recycled, and the whole heat insulation is realized, so that the power is low, and the cost of the heat source is low; the device has no high-power electrical equipment and low power consumption; the device can realize real-time monitoring and program control, and is low in operation input labor cost.
6) The reliability is high. The device has monitoring means for the flue gas flow, the temperature, the water content and the water quantity of each pipeline, and can be independently adjusted; working media in the spraying water system and the smoke-water heat exchanger are both closed circulation systems and are provided with water replenishing ports and discharge ports, so that the safe and reliable operation of the system can be ensured; the above influences can ensure the safe and reliable operation of the device.
7) The maintenance amount is small. Each part in the device has good running environment, small equipment loss and long service life; each part can be independently adjusted, and each main rotating machine can be manually adjusted and can also be automatically programmed; the device does not need special maintenance for parts after being shut down, so the maintenance amount is small.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is a first horizontal flue, 2 is a first heater, 3 is a circulating fan, 4 is a second heater, 5 is a third heater, 6 is a circulating fan outlet flue gas sampling and measuring port, 7 is a first-stage spray device lower water collecting tank, 8 is a first vertical flue, 9 is a first-stage spray device, 10 is a first-stage demister, 11 is a guide plate, 12 is a second horizontal flue, 13 is a second-stage spray device lower water collecting tank, 14 is a second vertical flue, 15 is a second-stage spray device, 16 is a second-stage demister, 17 is a third horizontal flue, 18 is a third-stage demister, 19 is a water taking heat exchanger, 20 is a water taking heat exchanger lower water collecting tank, 21 is a fourth-stage demister, 22 is a third vertical flue, 23 is a circulating fan inlet air supplementing port, 24 is a first water collecting tank, 25 is a first water collecting tank water outlet, 26 is a first water collecting tank water discharging port, 27 is a second water collecting tank, 28 is a spray water pump, 29 is a third water collecting tank, 30 is a third water collecting tank water inlet, 31 is a third water collecting tank water replenishing port, 32 is a fourth water collecting tank, 33 is a fourth water collecting tank water outlet, 34 is a fourth water collecting tank water outlet, 35 is a fifth water collecting tank, 36 is a fifth water collecting tank water outlet, 37 is a water taking heat exchanger outlet header, 38 is a water taking heat exchanger inlet header, 39 is a connecting pipeline, 40 is a water taking heat exchanger water replenishing port, 41 is a valve, 42 is a water taking heat exchanger circulating water pump, 43 is a water taking heat exchanger water outlet, 44 is a radiator, 45 is a flowmeter, 46 is a heat insulating layer, 47 is a water taking heat exchanger inlet sampling and measuring port, and 48 is a heat exchanger outlet sampling and measuring port.
Detailed Description
In order to make the technical solutions of the present invention better understood, 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, not all of the embodiments, and are not intended to limit the scope of the present disclosure. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure. 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.
There is shown in the drawings a schematic block diagram of a disclosed embodiment in accordance with the invention. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.
Referring to fig. 1, the experimental apparatus for flue gas moisture recovery in a ring arrangement comprises a first horizontal flue 1, a first vertical flue 8, a second horizontal flue 12, a second vertical flue 14, a third horizontal flue 17, a third vertical flue 22, a first heater 2, a circulating fan 3, a second heater 4, a third heater 5, a circulating fan outlet flue gas sampling and measuring port 6, a first-stage spraying device 9, a second-stage spraying device 15, a water intake heat exchanger inlet sampling and measuring port 47, a water intake heat exchanger 19, a water intake heat exchanger outlet sampling and measuring port 48, a first-stage spraying device lower water collecting tank 7, a second-stage spraying device lower water collecting tank 13, a water intake heat exchanger lower water collecting tank 20, a first water collecting tank 24, a first water collecting tank water outlet 25, a third water collecting tank water inlet 30, a third water collecting tank 29, a fourth water collecting tank 32, a fourth water collecting tank water outlet 33, A second header tank 27, a connecting pipe 39, a valve 41, a radiator 44, and a flow meter 45;
an outlet of the first horizontal flue 1 is communicated with an inlet of the first horizontal flue 1 through a first vertical flue 8, a second horizontal flue 12, a second vertical flue 14, a third horizontal flue 17 and a third vertical flue 22 in sequence;
the first heater 2, the circulating fan 3, the second heater 4, the third heater 5 and the circulating fan outlet flue gas sampling and measuring port 6 are sequentially arranged on the first horizontal flue 1 along the flue gas flowing direction;
the primary spraying device 9 and the primary demister 10 are sequentially arranged on the first vertical flue 8 along the flow direction of flue gas;
the secondary spraying device 15 and the secondary demister 16 are sequentially arranged on the second vertical flue 14 along the flow direction of the flue gas;
the three-stage demister 18, the water intake heat exchanger inlet sampling and measuring port 47, the water intake heat exchanger 19, the four-stage demister 21 and the water intake heat exchanger outlet sampling and measuring port 48 are sequentially arranged on the third horizontal flue 17 along the flue gas flowing direction;
an inlet air supplement port 23 of the circulating fan is arranged on the third vertical flue 22;
wherein, the primary spray device lower water collecting tank 7 is arranged right below the first vertical flue 8, the secondary spray device lower water collecting tank 13 is arranged right below the second vertical flue 14, and the water taking heat exchanger lower water collecting tank 20 is arranged right below the water taking heat exchanger 19;
the outlet of the lower water collecting tank 7 of the primary spray device is communicated with a third water collecting tank 29 through a first water collecting tank 24, a first water collecting tank water outlet 25 and a third water collecting tank water inlet 30, the outlet of the lower water collecting tank 13 of the secondary spray device is communicated with the third water collecting tank 29 through a fourth water collecting tank 32 and a fourth water collecting tank water outlet 33, and the outlet of the third water collecting tank 29 is communicated with the water inlet of the primary spray device 9 and the water inlet of the secondary spray device 15 through a spray water pump 28 and a second water collecting tank 27;
the first water collecting tank 24 is provided with a first water collecting tank water outlet 26; a fourth water collecting tank water outlet 34 is arranged on the fourth water collecting tank 32, and a third water collecting tank water replenishing port 31 is arranged on the third water collecting tank 29;
an outlet of the lower water collecting tank 20 of the water taking heat exchanger is communicated with an inlet of the fifth water collecting tank 35, and a fifth water collecting tank water outlet 36 is arranged on the fifth water collecting tank 35;
the water outlet of the water taking heat exchanger 19 is communicated with the water inlet of the water taking heat exchanger 19 through a water taking heat exchanger outlet header 37, a connecting pipeline 39, a valve 41, a water taking heat exchanger circulating water pump 42, a radiator 44, a flow meter 45 and a water taking heat exchanger inlet header 38, a water taking heat exchanger water replenishing port 40 is arranged on the connecting pipeline 39, and a water taking heat exchanger water discharging port 43 is arranged on a pipeline between the water taking heat exchanger circulating water pump 42 and the radiator 44.
The guide plates 11 are arranged at the communication position of the first horizontal flue 1 and the first vertical flue 8, the communication position of the first vertical flue 8 and the second horizontal flue 12, the communication position of the second vertical flue 14 and the third horizontal flue 17, the communication position of the third horizontal flue 17 and the third vertical flue 22 and the communication position of the third vertical flue 22 and the first horizontal flue 1.
The first horizontal flue 1 is provided with an insulating layer 46 on the outer surfaces of the first vertical flue 8, the second horizontal flue 12, the second vertical flue 14, the third horizontal flue 17 and the third vertical flue 22.
The medium for supplementing the system through the circulating fan inlet air supplementing opening 23 is air, flue gas or dust.
The starting process of the invention is as follows:
11) checking the flue gas moisture recovery experimental device, and keeping all the valves 41 in a fully closed state; keeping the inlet air supplement port 23 of the circulating fan, the outlet flue gas sampling and measuring port 6 of the circulating fan, the inlet sampling and measuring port 47 of the water taking heat exchanger and the outlet sampling and measuring port 48 of the water taking heat exchanger in a fully open state;
12) starting the circulating fan 3, gradually increasing the rotating speed of the circulating fan 3, and stabilizing the rotating speed of the circulating fan 3 when the static pressure of an inlet air supplement port 23 of the circulating fan is about-100 Pa;
13) continuously supplementing the flue gas which meets the conditions from the inlet air supplement port 23 of the circulating fan to the system;
14) opening valves on pipelines among the water taking heat exchanger 19, the radiator 44 and the water taking heat exchanger circulating water pump 42 to a full-open state, keeping the valve between the water replenishing port 40 of the water taking heat exchanger and the water discharging port 43 of the water taking heat exchanger in a full-closed state, and starting the water taking heat exchanger circulating water pump 42;
15) adjusting valves on pipelines between the first-stage spraying device 9 and the second water collecting tank 27 to be in a fully-opened state, and adjusting valves on pipelines between the first water collecting tank 24, the second water collecting tank 27, the third water collecting tank 29 and the fourth water collecting tank 32 to be in a fully-opened state; adjusting a valve on a pipeline between the lower water collecting tank 13 and the fourth water collecting tank 32 of the secondary spraying device to a fully open state; starting the spray water pump 28;
16) opening a valve on a pipeline between the lower water collecting tank 20 of the water taking heat exchanger and the fifth water collecting tank 35 to a full open state;
17) and starting heat sources of the first heater 2, the second heater 4 and the third heater 5, gradually increasing the power, and completing system starting when the temperature of the inlet sampling and measuring port 47 of the water taking heat exchanger reaches 60 ℃.
The operation process of the invention is as follows:
21) the flue gas flow of the device is adjusted by adjusting the rotating speed of the circulating fan 3, the static pressure of an inlet air supplement port 23 of the circulating fan is about-100 Pa, and the flow load of an inlet sampling and measuring port 47 of the water taking heat exchanger is close to the designed flow of the system;
22) the power of the first heater 2, the second heater 4 and the third heater 5 is adjusted to adjust the smoke temperature, and the adjustment target is to adjust the smoke temperature of an inlet sampling and measuring port 47 of the water taking heat exchanger to about 60 ℃;
23) the moisture content in the flue gas is adjusted by adjusting the spraying water flow and the layer number of the first-stage spraying device 9, the second-stage spraying device 15 and each pipeline;
24) the flow rate of the water pump is controlled by adjusting the rotating speed of the water taking heat exchanger circulating water pump 42; by adjusting the load on the radiator 44, the water temperature in the intake heat exchanger inlet header 38 is adjusted;
25) measuring the amount of recovered water by a flow meter 45 between the lower header tank 20 of the water intake heat exchanger and the fifth header tank 35, and determining the opening or closing of the fifth header tank outlet 36 by the water level of the fifth header tank 35;
26) through installing flue gas sample and measuring aperture on water intaking heat exchanger 19 import and export flue, monitor parameters such as flue gas flow, flue gas temperature, flue gas composition, flue gas water content, utilize above-mentioned adjustment mode simultaneously for the operating condition of whole device satisfies the experiment operating mode requirement under the different boundary conditions.
The shutdown process of the invention is as follows:
31) turning off the heat sources of the first heater 2, the second heater 4 and the third heater 5;
32) after the temperature of the smoke at the inlet of the water taking heat exchanger 19 is reduced to below 40 ℃, the spray water pump 28 is stopped, and the spray system and the valves on the connecting pipelines are closed in sequence;
33) closing the water intake heat exchanger circulating water pump 42, closing the radiator 44 and closing the valves on the circulating pipeline;
34) and after the temperature of the smoke at the inlet of the water taking heat exchanger 19 is reduced to be below 40 ℃, the circulating fan 3 is closed.
Finally, the invention can test the flue gas moisture recovery performance under the experimental conditions of heat exchange modules with different flue gas temperatures, different flue gas water contents and different pipe materials and module heat exchange of different pipe row arrangements, has reasonable design and complete functions, is provided with a ring arrangement, has the functions of energy saving, water saving, heat energy saving and high efficiency utilization of working media, has an independently adjustable flue gas system, a heater system with compact structure and easy adjustment, a multi-path closed adjustable flue gas spraying system, a heat exchanger module which can be flexibly disassembled, a working medium closed circulation system in a water taking heat exchanger 19 with adjustable flow and temperature, a collection system with a recovered water collecting tank, a flue gas guide plate 11 with flow field optimization, pipeline flow adjustable design and whole system heat preservation design, and can complete the research work of flue gas moisture recovery under multivariable conditions with high quality.
The invention has the advantages of reasonable design, complete functions, convenient operation, stable operation, strong anti-interference capability, high measurement accuracy, strong flexibility, low construction cost, low operation cost, small maintenance amount, safety, reliability and the like, and can meet the requirements of the experimental research work of flue gas moisture recovery.
Claims (10)
1. The utility model provides a flue gas moisture recovery experimental apparatus that ring type was arranged, a serial communication port, including first horizontal flue (1), first vertical flue (8), second horizontal flue (12), second vertical flue (14), third horizontal flue (17), third vertical flue (22), first heater (2), circulating fan (3), second heater (4), third heater (5), circulating fan export flue gas sample and measuring mouth (6), one-level spray set (9), second grade spray set (15), water intaking heat exchanger import sample and measuring mouth (47), water intaking heat exchanger (19), water intaking heat exchanger export sample and measuring mouth (48), water collecting tank (7) under the one-level spray set, water collecting tank (13) under the second grade spray set, water intaking heat exchanger water collecting tank (20), first header tank (24), first header tank delivery port (25), A third water collecting tank water inlet (30), a third water collecting tank (29), a fourth water collecting tank (32), a fourth water collecting tank water outlet (33), a second water collecting tank (27), a connecting pipeline (39), a valve (41), a radiator (44) and a flowmeter (45);
an outlet of the first horizontal flue (1) is communicated with an inlet of the first horizontal flue (1) through a first vertical flue (8), a second horizontal flue (12), a second vertical flue (14), a third horizontal flue (17) and a third vertical flue (22) in sequence;
the first heater (2), the circulating fan (3), the second heater (4), the third heater (5) and a circulating fan outlet flue gas sampling and measuring port (6) are sequentially arranged on the first horizontal flue (1) along the flow direction of flue gas; the primary spraying device (9) is arranged on the first vertical flue (8), and the secondary spraying device (15) is arranged on the second vertical flue (14); the water taking heat exchanger inlet sampling and measuring port (47), the water taking heat exchanger (19) and the water taking heat exchanger outlet sampling and measuring port (48) are sequentially arranged on the third horizontal flue (17) along the flow direction of flue gas;
a lower water collecting tank (7) of the primary spraying device is arranged right below the first vertical flue (8), a lower water collecting tank (13) of the secondary spraying device is arranged right below the second vertical flue (14), and a lower water collecting tank (20) of the water taking heat exchanger is arranged right below the water taking heat exchanger (19);
the outlet of the lower water collecting tank (7) of the primary spraying device is communicated with a third water collecting tank (29) through a first water collecting tank (24), a first water collecting tank water outlet (25) and a third water collecting tank water inlet (30), the outlet of the lower water collecting tank (13) of the secondary spraying device is communicated with the third water collecting tank (29) through a fourth water collecting tank (32) and a fourth water collecting tank water outlet (33), and the outlet of the third water collecting tank (29) is communicated with the water inlet of the primary spraying device (9) and the water inlet of the secondary spraying device (15) through a second water collecting tank (27);
the water outlet of the water taking heat exchanger (19) is communicated with the water inlet of the water taking heat exchanger (19) through a connecting pipeline (39), a valve (41), a radiator (44) and a flowmeter (45).
2. The experimental device for flue gas moisture recovery in a ring arrangement according to claim 1, further comprising a first-stage demister (10), a second-stage demister (16), a third-stage demister (18) and a fourth-stage demister (21);
the primary spraying device (9) and the primary demister (10) are sequentially arranged on the first vertical flue (8) along the flow direction of flue gas;
the secondary spraying device (15) and the secondary demister (16) are sequentially arranged on the second vertical flue (14) along the flow direction of flue gas;
the three-stage demister (18), the water taking heat exchanger inlet sampling and measuring port (47), the water taking heat exchanger (19), the four-stage demister (21) and the water taking heat exchanger outlet sampling and measuring port (48) are sequentially arranged on the third horizontal flue (17) along the flue gas flowing direction.
3. The experimental apparatus for flue gas moisture recovery in a ring arrangement according to claim 1, further comprising a circulating fan inlet air supplement opening (23); and an inlet air supplement port (23) of the circulating fan is arranged on the third vertical flue (22).
4. The experimental facility for flue gas moisture recovery in a ring arrangement according to claim 1, wherein the outlet of the third water collecting tank (29) is connected to the water inlet of the primary spraying device (9) and the water inlet of the secondary spraying device (15) via a spray water pump (28) and a second water collecting tank (27).
5. The experimental facility for flue gas moisture recovery in a ring arrangement according to claim 1, wherein the first water collection tank (24) is provided with a first water collection tank water outlet (26); a fourth water collecting tank water outlet (34) is arranged on the fourth water collecting tank (32), and a third water collecting tank water replenishing opening (31) is arranged on the third water collecting tank (29).
6. The experimental apparatus for flue gas moisture recovery in a ring arrangement according to claim 1, further comprising a fifth water collection tank (35); an outlet of the lower water collecting tank (20) of the water taking heat exchanger is communicated with an inlet of the fifth water collecting tank (35), and a fifth water collecting tank water outlet (36) is arranged on the fifth water collecting tank (35).
7. The experimental facility for flue gas moisture recovery in a ring arrangement according to claim 1, wherein the water outlet of the water intake heat exchanger (19) is communicated with the water inlet of the water intake heat exchanger (19) through the water intake heat exchanger outlet header (37), the connecting pipe (39), the valve (41), the water intake heat exchanger circulating water pump (42), the radiator (44), the flow meter (45) and the water intake heat exchanger inlet header (38).
8. The experimental facility for flue gas moisture recovery in a ring arrangement according to claim 7, wherein the connecting pipe (39) is provided with a water intake heat exchanger water replenishing port (40);
a water outlet (43) of the water taking heat exchanger is arranged on a pipeline between the water taking heat exchanger circulating water pump (42) and the radiator (44).
9. The circularly-arranged flue gas moisture recovery experimental device as claimed in claim 1, wherein the flow guide plates (11) are arranged at the communication position of the first horizontal flue (1) and the first vertical flue (8), the communication position of the first vertical flue (8) and the second horizontal flue (12), the communication position of the second vertical flue (14) and the third horizontal flue (17), the communication position of the third horizontal flue (17) and the third vertical flue (22), and the communication position of the third vertical flue (22) and the first horizontal flue (1).
10. The experimental device for flue gas moisture recovery in a ring-type arrangement according to claim 1, characterized in that the outer surfaces of the first horizontal flue (1), the first vertical flue (8), the second horizontal flue (12), the second vertical flue (14), the third horizontal flue (17) and the third vertical flue (22) are provided with insulating layers (46).
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