CN220642620U - Furnace water quality improving system - Google Patents

Abstract

The application provides a stove water quality lifting system, including first detection device, second detection device and even arrange controlling means, first detection device is used for being linked together with the boiler steam pocket, with detect the stove water quality information in the boiler steam pocket, the second detecting element is used for being linked together with the sewage discharge pipeline, with the sewage flow information in the sewage discharge pipeline of detection, be provided with the control valve on the sewage discharge pipeline, even arrange controlling means respectively with first detection device, second detection device and control valve electric connection, even arrange controlling means can be based on stove water quality information and sewage flow information adjustment control valve's aperture. The continuous-discharge control device is arranged to adjust the opening of the control valve in real time based on the water quality information and the sewage flow information of the boiler water, so that the problems of insufficient sewage discharge or excessive sewage discharge caused by hysteresis of sewage discharge are avoided, the automation of sewage discharge in the boiler drum is realized, and the water quality of the boiler in the boiler drum is improved.

Description

Furnace water quality improving system

Technical Field

The application belongs to the technical field of furnace water emission, and particularly relates to a furnace water quality improving system.

Background

The boiler water penetrates through the whole boiler thermodynamic system, and the quality of the boiler water directly influences the service life and heat exchange efficiency of main equipment such as a boiler, a steam turbine and the like. The steam boiler operates under a certain pressure, and as the boiler water is continuously evaporated, the concentration ratio of the boiler water is increased, if the boiler water is not accurately and timely controlled, the water vapor system is always damaged by corrosion, scaling, salt accumulation and the like, and the damage to boiler pipe fittings and thermodynamic components is always caused, so that the heat exchange efficiency of the boiler is reduced, the coal consumption is increased, the energy conservation, emission reduction and economic operation of the boiler are not facilitated, and serious liability accidents are caused.

In order to control the water quality of boiler water to meet the national standard, impurities in the boiler water must be discharged to keep the pH value and the silicon-phosphorus ion content of the boiler water within certain limits, so that the safe and energy-saving operation of the boiler and a thermodynamic system is economically and effectively ensured. The current discharge mode is: firstly, chemical laboratory staff is used for testing the furnace water, and then the staff is informed of adjusting the opening of the continuous valve according to the test value condition. Because the boiler water value relies on the manual test to carry out data support, relies on the manual work unable in time to adjust and link row valve aperture, can cause the boiler water to discharge and have hysteresis quality to make boiler heat exchange efficiency reduce, the coal consumption increases.

Disclosure of Invention

Therefore, the technical problem to be solved in the application is to provide a boiler water quality improving system, which can adjust the opening of a control valve in time so as to increase the heat exchange efficiency of a boiler and reduce the coal consumption.

In order to solve the above problems, the application provides a boiler water quality improvement system in one aspect, which comprises a first detection device, a second detection device and a continuous discharge control device, wherein the first detection device is used for being communicated with a boiler steam drum so as to detect boiler water quality information in the boiler steam drum, the second detection unit is used for being communicated with a sewage discharge pipeline so as to detect sewage flow information in the sewage discharge pipeline, a control valve is arranged on the sewage discharge pipeline, the continuous discharge control device is respectively electrically connected with the first detection device, the second detection device and the control valve, and the continuous discharge control device can adjust the opening of the control valve based on the boiler water quality information and the sewage flow information.

Optionally, the first detection device comprises a sampling unit and an online analyzer, one end of the sampling unit is communicated with the boiler steam drum, the other end of the sampling unit is communicated with the online analyzer, and the online analyzer is used for detecting the conductivity, the PH value and the silicon dioxide and phosphate radical content of the furnace water.

Optionally, the boiler water quality improving system further comprises a dosing device, the dosing device further comprises a dosing tank and a dosing pump, and the dosing tank is communicated with the boiler steam drum through the dosing pump.

Optionally, the dosing device further comprises an analysis module, the analysis module is electrically connected with the continuous control device, and the analysis module is used for adjusting the opening of the dosing pump according to the phosphate content in the furnace water obtained by the continuous control device.

Optionally, the second detection device includes throttling element, pressure transmitter and pressure difference transmitter, throttling element sets up the downstream side of control valve along the flow path direction, throttling element with sewage discharge pipeline is linked together, pressure transmitter with pressure difference transmitter sets up on the throttling element, and with link row controlling means electric connection.

Optionally, the furnace water quality improving system further comprises a row of expansion vessels, wherein the row of expansion vessels are communicated with the sewage discharge pipeline, and the row of expansion vessels are arranged on the downstream side of the throttling element along the flow velocity direction.

Optionally, the furnace water quality improving system further comprises a drainage ditch pipeline, wherein the drainage ditch pipeline is communicated with the sewage discharge pipeline, and the drainage ditch pipeline is arranged on the downstream side of the continuous drainage expansion vessel along the flow path direction.

Advantageous effects

According to the boiler water quality improving system provided by the embodiment of the utility model, the boiler water with higher salt content can be automatically discharged from the boiler steam drum during operation by arranging the first detection device, the second detection device and the continuous discharge control device to form the steam-water intelligent measurement and control system in the boiler steam drum. In the prior art, the laboratory test personnel are relied on to test the furnace water, then the staff is informed to adjust the opening of the continuous discharge valve according to the condition of the laboratory test value, and as the furnace water value is supported by the data through the manual laboratory test, the opening of the continuous discharge valve can not be adjusted in time by the manual work, the hysteresis quality of sewage discharge can be caused, so that the heat exchange efficiency of the boiler is reduced, and the coal consumption is increased. Compared with the prior art, in this application file, through setting up first detection device, second detection device and even arrange controlling means, so that the first detection device detects the boiler water quality information in the boiler steam drum, the second detection device detects the sewage flow information in the sewage discharge pipeline, can realize with first detection device, second detection device and control valve electric connection's even arrange the controller can be based on boiler water quality information and sewage flow information real-time regulation control valve's aperture, can in time discharge the higher boiler water of salt content from the boiler steam drum when boiler operation, can avoid the sewage to discharge and have hysteresis quality and arouse blowdown inadequately or the excessive problem of blowdown, can form boiler catch water intelligent measurement and control system, in order to realize boiler water and discharge automation, thereby improve boiler water quality in the boiler steam drum, so that boiler's heat transfer efficiency risees, the coal consumption reduces.

Drawings

Fig. 1 is a schematic diagram of a furnace water quality improvement system according to an embodiment of the present application.

The reference numerals are expressed as:

1. a first detection device; 2. a second detection device; 21. a throttle member; 22. a pressure transmitter; 23. a differential pressure transmitter; 3. a row control device; 4. a boiler drum; 5. a sewage discharge pipeline; 6. a control valve; 7. a dosing device; 8. a row of expansion vessels; 9. and (5) discharging the trench pipeline.

Detailed Description

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present utility model only, and are not intended to limit the present utility model.

Referring to fig. 1 in combination, according to an embodiment of the present application, there is provided a boiler water quality improving system, including a first detecting device 1, a second detecting device 2 and a continuous-discharge control device 3, the first detecting device 1 is used for being communicated with a boiler drum 4 to detect boiler water quality information in the boiler drum 4, the second detecting unit is used for being communicated with a sewage discharge pipeline 5 to detect sewage flow information in the sewage discharge pipeline 5, a control valve 6 is provided on the sewage discharge pipeline 5, the continuous-discharge control device 3 is electrically connected with the first detecting device 1, the second detecting device 2 and the control valve 6 respectively, and the continuous-discharge control device 3 can adjust the opening of the control valve 6 based on the boiler water quality information and the sewage flow information.

According to the boiler water quality improving system provided by the embodiment of the utility model, the first detection device 1, the second detection device 2 and the continuous emission control device 3 are mainly arranged to form the steam-water intelligent measurement and control system in the boiler drum 4, so that boiler water with higher salt content can be automatically controlled to be discharged from the boiler drum 4 when the boiler is operated. In the prior art, the laboratory test personnel are relied on to test the furnace water, then the staff is informed to adjust the opening of the continuous discharge valve according to the condition of the laboratory test value, and as the furnace water value is supported by the data through the manual laboratory test, the opening of the continuous discharge valve can not be adjusted in time by the manual work, the hysteresis quality of sewage discharge can be caused, so that the heat exchange efficiency of the boiler is reduced, and the coal consumption is increased. Compared with the prior art, in this application file, through setting up first detection device 1, second detection device 2 and even arrange controlling means 3, so that first detection device 1 detects the boiler water quality information in the boiler drum 4, second detection device 2 detects the sewage flow information in the sewage discharge pipeline 5, can realize with first detection device 1, second detection device 2 and control valve 6 electric connection's even arrange the controller can be based on boiler water quality information and sewage flow information real-time regulation control valve 6's aperture, can in time discharge the higher boiler water of salt content from boiler drum 4 when the boiler is running, can avoid the sewage to discharge to have hysteresis quality and arouse blowdown inadequately or blowdown excessive problem, can form boiler steam and water intelligent measurement and control system, in order to realize boiler water discharge automation, thereby improve boiler water quality in the boiler drum 4, so that the heat exchange efficiency of boiler risees, the coal consumption reduces.

The boiler water quality improving system comprises a boiler steam drum 4 and a sewage discharge pipeline 5, wherein the sewage discharge pipeline 5 is communicated with the boiler steam drum 4, and the sewage discharge pipeline 5 is used for discharging boiler water of which the inner part of the boiler steam drum 4 is polluted by salt and water slag.

Specifically, the boiler water of boiler drum 4 internal portion by salt matter and slag pollution is sewage, contains the higher boiler water of salt composition promptly, and in this embodiment of the application, boiler water quality promotion system is through the sewage in the discharge boiler drum 4 to improve the boiler water quality in the boiler drum 4, thereby improve the heat transfer efficiency of boiler.

The boiler water quality improving system further comprises a first detecting device 1, the first detecting device 1 can be on-line monitoring and analyzing equipment, and can monitor the boiler water quality information in the boiler drum 4 in real time, and the boiler water quality improving system is not limited further.

Specifically, a detection port is formed in the outer wall of the boiler drum 4, the first detection device 1 is communicated with the detection port of the boiler drum 4 through a pipeline, and the first detection device 1 is used for detecting the water quality information of the boiler water in the boiler drum 4 in real time.

Wherein, furnace water quality promotes system still includes second detection device 2, and second detection device 2 can be flow measurement equipment etc. can the real-time supervision sewage flow in the sewage discharge pipeline 5 can, this application does not do further limit.

In particular, the second detection device 2 is arranged on the sewage discharge line 5.

The boiler water quality improving system further comprises a control valve 6, the control valve 6 is arranged between the boiler drum 4 and the second detection device 2, the control valve 6 is communicated with the sewage discharge pipeline 5, and the discharge capacity of the boiler drum 4 can be controlled by adjusting the opening of the control valve 6.

The system for improving the quality of the furnace water further comprises a continuous control device 3, and the continuous control device 3 is respectively and electrically connected with the first detection device 1, the second detection device 2 and the control valve 6.

Specifically, the row control device 3 includes an acquisition module and a sewage flow measurement module, where the acquisition module is configured to receive information acquired by the first detection device 1 and the second detection device 2, and transmit the information acquired by the first detection device 1 and the second detection device 2 to the sewage flow measurement module. The blowdown flow measurement module is used for calculating the instantaneous flow and the accumulated flow of the sewage according to a vapor-liquid two-phase flow algorithm, the flow information of the sewage is used as a feedforward quantity, and the blowdown flow measurement module is also used for adjusting the opening of the control valve 6 according to the feedforward quantity and the water quality information of the furnace water so as to control the blowdown quantity.

The first detection device 1 comprises a sampling unit and an online analyzer, wherein one end of the sampling unit is communicated with the boiler drum 4, and the other end of the sampling unit is communicated with the online analyzer, and the online analyzer is used for detecting the conductivity, the PH value and the silicon dioxide and phosphate content of furnace water.

Through setting up the online analysis appearance so that the staff can look over conductivity, PH value and silica and the phosphate content information of boiler water in the boiler drum 4 in real time to with information transmission to even arrange controlling means 3, so that even arrange controlling means 3 can be according to boiler water quality information regulation control valve 6, improved device degree of automation, its easy operation is convenient simultaneously, has improved work efficiency compared with relying on laboratory test personnel chemical examination boiler water among the prior art.

Wherein, the first detection device 1 comprises a sampling unit and an online analyzer, one end of the sampling unit is communicated with a detection port of the boiler drum 4, and the other end of the sampling unit is communicated with the online analyzer.

Specifically, the online analyzer comprises a pH value meter, a furnace water silicon meter, a phosphorus meter and an electric conductivity meter to detect the electric conductivity, the pH value and the silicon dioxide and phosphate content of the furnace water.

Wherein, the row control device 3 is electrically connected with the on-line analyzer.

Specifically, in the embodiment of the present application, the continuous-exhaust control device 3 determines whether to adjust the opening of the control valve 6 according to the feedforward amount and the pollution discharge control algorithm, and controls the pollution discharge amount thereof. The pollution discharge control algorithm adopts an artificial intelligent fuzzy control mode under a constraint condition, and takes the pollution discharge amount as a feedback amount. During normal operation, the content of silicon dioxide is used as a main control quantity, the PH value and the conductivity are used as constraint control variables, and the pollution discharge quantity is reduced as much as possible on the premise of ensuring the index of furnace water; when the silica instrument lacks signals or fails, the PH value is used as a main control variable for calculating the sodium value of the furnace water, and the conductivity is used as a constraint control variable; the conductivity is used as a control variable in the absence of signal or fault of the silica content and the pH value. The control program realizes the adjustment of the boiler blow-down flow and achieves the purpose of automatic blow-down. When all the on-line meters fail, the operation is automatically switched into a manual control mode.

The furnace water quality improving system further comprises a dosing device 7, the dosing device 7 further comprises a dosing tank and a dosing pump, and the dosing tank is communicated with the boiler drum 4 through the dosing pump.

Through setting up dosing device 7 and making dosing device 7 be linked together with boiler drum 4, can realize adding the medicament that can form loose incrustation scale with calcium, magnesium plasma in to boiler drum 4 to avoid its attached boiler drum 4 on the inner wall lead to boiler drum 4 scale deposit and corruption, and then reduce the possibility of forming hard incrustation scale in the boiler drum 4, so that loose incrustation scale can regularly follow sewage discharge pipeline 5 and discharge, can realize carrying out the internal treatment to the boiler water, thereby reach the purpose that improves the boiler water quality.

Wherein, the outer wall of the boiler drum 4 is also provided with a dosing port, and the dosing device 7 is communicated with the dosing port through a pipeline.

Wherein, dosing device 7 includes the dosing tank, and the dosing tank is interior to store the medicament, and the medicament can be caustic soda etc. other can form the medicament of loose incrustation scale with calcium, magnesium plasma, does not do further limit this application.

Wherein, dosing device 7 still includes the charge pump, and the dosing tank is linked together with the charge mouth through the charge pump.

The dosing device 7 further comprises an analysis module, the analysis module is electrically connected with the continuous-discharge control device 3, and the analysis module is used for adjusting the opening of the dosing pump through the phosphate content in the furnace water obtained by the continuous-discharge control device 3.

By arranging the analysis module and enabling the continuous control device 3 to be electrically connected with the analysis module and the dosing pump respectively, the continuous control device 3 can adjust the opening of the dosing pump according to the water quality information of the furnace water, so that the accurate control of the dosing amount of the dosing device 7 is realized; meanwhile, the dosing pump can be adjusted in real time according to the water quality change condition of the furnace water, so that the automation degree of the dosing device 7 is improved; meanwhile, the purpose of quickly adjusting the quality of the furnace water can be achieved by combining the real-time adjustment of the opening of the dosing pump with the real-time adjustment of the opening of the control valve 6, the response speed is high, the result is accurate, and therefore the energy-saving effect of the furnace water quality improving system is improved.

The chemical adding device 7 further comprises an analysis module, wherein the analysis module is electrically connected with the continuous control device 3, and the analysis module can acquire water quality information of the boiler water in the boiler drum 4, namely the conductivity, the PH value and the silicon dioxide and phosphate content of the boiler water, so as to adjust the opening of the chemical adding pump.

Specifically, the analysis module adjusts the opening degree of the dosing pump according to the content of phosphate radical in the furnace water, in the embodiment of the application, the lower the content of carbonate radical in the furnace water is, the larger the opening degree of the dosing pump is, otherwise, the opening degree of the dosing pump is adjusted to be reduced. The automatic adjustment of the dosing quantity is realized by arranging the analysis module, so that the problems of delayed dosing and untimely dosing quantity are reduced.

Wherein, the adjustment of the dosing amount is frequency conversion adjustment, which solves the disadvantages of fluctuation, hysteresis and nonlinearity of dosing.

The second detecting device 2 includes a throttle member 21, a pressure transmitter 22 and a differential pressure transmitter 23, the throttle member 21 is disposed on the downstream side of the control valve 6 in the flow path direction, the throttle member 21 is communicated with the sewage discharge pipeline 5, and the pressure transmitter 22 and the differential pressure transmitter 23 are disposed on the throttle member 21 and electrically connected with the continuous discharge control device 3.

By arranging the pressure transmitter 22 and the pressure difference transmitter 23 on the throttling element 21 and enabling the pressure transmitter 22 and the pressure difference transmitter 23 to be electrically connected with the continuous discharge control device 3, the continuous discharge control device 3 can acquire the furnace water discharge flow and the pressure difference in real time by utilizing the pressure transmitter 22 and the pressure difference transmitter 23 so as to calculate the current sewage flow in real time through a vapor-liquid two-phase flow algorithm, and can monitor the sewage flow in the sewage discharge pipeline 5 in real time and send flow information to the continuous discharge control device 3 so as to adjust the opening of the control valve 6.

The second detecting device 2 includes a throttling element 21, the throttling element 21 may be a vapor-liquid two-phase flow measuring device, etc., and the application is not further limited, and the throttling element 21 is arranged to accurately measure the discharge capacity of the water quality improving system under the condition that liquid and vapor coexist, so that the application range of the water quality improving system is enlarged.

Wherein the second detecting device 2 further comprises a pressure transmitter 22 and a differential pressure transmitter 23, the pressure transmitter 22 and the differential pressure transmitter 23 being arranged on the second detecting device 2.

Specifically, a pressure sampling port and a differential pressure sampling port are formed in the throttling element 21, a pressure transmitter 22 is connected with the pressure sampling port and used for detecting incoming flow pressure at the inlet end of the throttling element 21, a differential pressure transmitter 23 is connected with the differential pressure sampling port and used for detecting differential pressure flowing through the throttling element 21 and converting two signals into 420mA current signals to be transmitted to a sewage discharge flow measuring module, current sewage discharge instantaneous flow is obtained through a gas-liquid two-phase flow algorithm, and the system automatically accumulates flow so that workers can timely know instantaneous sewage discharge flow and accumulated flow.

The furnace water quality improving system further comprises a continuous-row expansion vessel 8, wherein the continuous-row expansion vessel 8 is communicated with the sewage discharge pipeline 5, and the continuous-row expansion vessel 8 is arranged on the downstream side of the throttling element 21 along the flow velocity direction.

By arranging the continuous-row expansion vessel 8 and enabling the continuous-row expansion vessel 8 to be communicated with the sewage discharge pipeline 5, the separation of the furnace water into the secondary steam and the waste hot water after passing through the continuous-row expansion vessel 8 can be realized, the recycling of the secondary steam can be realized, and the heat exchange efficiency of the boiler is improved.

The system for improving the quality of the furnace water further comprises a continuous-row expansion vessel 8, wherein the continuous-row expansion vessel 8 is arranged on the downstream side of the throttling piece 21 along the flow path direction, the continuous-row expansion vessel 8 is communicated with the sewage discharge pipeline 5, and the continuous-row expansion vessel 8 is used for separating steam in sewage so as to realize secondary steam recycling.

The furnace water quality improving system further comprises a drainage ditch pipeline 9, wherein the drainage ditch pipeline 9 is communicated with the sewage discharge pipeline 5, and the drainage ditch pipeline 9 is arranged on the downstream side of the continuous drainage expansion vessel 8 along the flow path direction.

By arranging the drainage trench pipeline 9 and arranging the drainage trench pipeline 9 on the downstream side of the continuous drainage expansion vessel 8, waste hot water generated by the continuous drainage expansion vessel 8 can be discharged out of the system through the drainage trench pipeline 9, and the running stability of the system is improved.

The furnace water quality improving system further comprises a drainage ditch pipeline 9, the drainage ditch pipeline 9 is arranged on the downstream side of the continuous drainage expansion vessel 8 along the flow path direction, the drainage ditch pipeline 9 is communicated with the sewage discharge pipeline 5, and the drainage ditch pipeline 9 is used for discharging waste hot water in the sewage discharge pipeline 5.

The control method of the furnace water quality improving system comprises the following steps:

step s101: and acquiring the conductivity, PH value and silicon dioxide and phosphate content information of the boiler water in the boiler drum 4 in real time.

The online analyzer is communicated with the boiler drum 4 through the sampling unit and comprises a PH value meter, a boiler water silicon meter, a phosphorus meter and a conductivity meter, so that the real-time detection of the boiler water quality information in the boiler drum 4 can be realized.

Wherein, the furnace water quality information comprises conductivity, PH value and silicon dioxide and phosphate content.

Specifically, in the embodiment of the application, the carbonate content information of the furnace water is used for adjusting the opening degree of the dosing pump.

Step s201: and adjusting the opening of the dosing pump based on the phosphate content information.

Wherein, dosing device 7 includes analytical module, analytical module and dosing pump electric connection, and analytical module can control the aperture of dosing pump to realize adjusting the dosing.

Specifically, the analysis module is electrically connected with the continuous-row control device 3, and the analysis module is used for adjusting the opening of the dosing pump according to the carbonate content information of the boiler water in the boiler drum 4 received by the continuous-row control device 3. In this embodiment of the application, the carbonate content exceeds the set threshold, and the analysis module controls the opening of the dosing pump to increase, whereas the analysis module controls the opening of the dosing pump to decrease. The automatic variable frequency adjustment of the dosing quantity can be realized by arranging the analysis module, the problems of delayed dosing and untimely dosing quantity can be avoided, and the aim of adjusting the quality of the boiler water in the boiler drum 4 can be realized by adjusting the dosing quantity.

The method further comprises the steps of:

step s301: and acquiring sewage flow information in the sewage discharge pipeline 5.

The sewage discharge pipeline 5 is provided with a throttling element 21, namely a vapor-liquid two-phase flow measuring device, and the throttling element 21 is used for acquiring pressure information of fluid in the sewage discharge pipeline.

Specifically, the throttle member 21 is provided with a pressure transmitter 22 and a differential pressure transmitter 23, the pressure transmitter 22 is used for detecting the incoming flow pressure of the inlet end of the throttle member 21, and the differential pressure transmitter 23 is used for detecting the differential pressure flowing through the throttle member 21. The pressure transmitter 22 and the differential pressure transmitter 23 are electrically connected with the continuous discharge control device 3 so as to convert the two pressure signals into 420mA current signals and transmit the 420mA current signals to a sewage flow measurement module, and the sewage flow measurement module calculates the current sewage flow in real time through a vapor-liquid two-phase flow algorithm, so that the sewage flow in the sewage discharge pipeline 5 can be monitored in real time and flow information can be sent to the continuous discharge control device 3 so as to adjust the opening of the control valve 6.

The method further comprises the steps of:

step s401: the opening degree of the control valve 6 is adjusted based on the conductivity information, the PH information, the silica information, and the sewage flow information.

Wherein the blowdown flow measurement module is capable of adjusting the opening of the control valve 6 based on conductivity information, PH information, silica information, and wastewater flow information.

Specifically, the sewage flow information is the feedforward amount calculated by the sewage flow measurement module, and the sewage flow measurement module determines whether to adjust the opening of the control valve 6 according to the feedforward amount and the sewage control algorithm and controls the sewage flow. The pollution discharge control algorithm adopts an artificial intelligent fuzzy control mode under a constraint condition, and takes the pollution discharge amount as a feedback amount. During normal operation, the content of silicon dioxide is used as a main control quantity, the PH value and the conductivity are used as constraint control variables, and the pollution discharge quantity is reduced as much as possible on the premise of ensuring the index of furnace water; when the silica instrument lacks signals or fails, the PH value is used as a main control variable for calculating the sodium value of the furnace water, and the conductivity is used as a constraint control variable; the conductivity is used as a control variable in the absence of signal or fault of the silica content and the pH value. The control program realizes the adjustment of the boiler blow-down flow and achieves the purpose of automatic blow-down. When all the on-line meters fail, the operation is automatically switched into a manual control mode.

In the embodiment of the application, the water quality information of the boiler water in the boiler drum 4 can be acquired through the online analyzer, then the sewage discharge flow of the sewage discharge pipeline 5 can be acquired in real time by utilizing the pressure transmitter 22 and the differential pressure transmitter in combination with the throttling element 21, and the dosing quantity is regulated by combining the dosing device 7, so that the aim of improving the quality of the boiler water in the boiler drum 4 is fulfilled, the response speed is high, the result is accurate, and the energy-saving effect is improved.

According to the boiler water quality improving system provided by the embodiment of the utility model, the first detection device 1, the second detection device 2 and the continuous emission control device 3 are mainly arranged to form the steam-water intelligent measurement and control system in the boiler drum 4, so that boiler water with higher salt content can be automatically controlled to be discharged from the boiler drum 4 when the boiler is operated. In the prior art, the laboratory test personnel are relied on to test the furnace water, then the staff is informed to adjust the opening of the continuous discharge valve according to the condition of the laboratory test value, and as the furnace water value is supported by the data through the manual laboratory test, the opening of the continuous discharge valve can not be adjusted in time by the manual work, the hysteresis quality of sewage discharge can be caused, so that the heat exchange efficiency of the boiler is reduced, and the coal consumption is increased. Compared with the prior art, in this application file, through setting up first detection device 1, second detection device 2 and even arrange controlling means 3, so that first detection device 1 detects the boiler water quality information in the boiler drum 4, second detection device 2 detects the sewage flow information in the sewage discharge pipeline 5, can realize with first detection device 1, second detection device 2 and control valve 6 electric connection's even arrange the controller can be based on boiler water quality information and sewage flow information real-time regulation control valve 6's aperture, can in time discharge the higher boiler water of salt content from boiler drum 4 when the boiler is running, can avoid the sewage to discharge to have hysteresis quality and arouse blowdown inadequately or blowdown excessive problem, can form boiler steam and water intelligent measurement and control system, in order to realize boiler water discharge automation, thereby improve boiler water quality in the boiler drum 4, so that the heat exchange efficiency of boiler risees, the coal consumption reduces.

It will be readily appreciated by those skilled in the art that the above advantageous ways can be freely combined and superimposed without conflict.

The foregoing description of the preferred embodiment of the present utility model is not intended to limit the utility model to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model. The foregoing is merely a preferred embodiment of the present application and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principles of the present application, and these modifications and variations should also be regarded as the scope of the present application.

Claims (7)

1. The utility model provides a boiler water quality hoisting system, its characterized in that includes first detection device (1), second detection device (2) and even arranges controlling means (3), first detection device (1) are used for being linked together with boiler drum (4), so as to detect boiler water quality information in boiler drum (4), second detection device is used for being linked together with sewage discharge pipeline (5), so as to detect sewage flow information in sewage discharge pipeline (5), be provided with control valve (6) on sewage discharge pipeline (5), even arrange controlling means (3) respectively with first detection device (1), second detection device (2) and control valve (6) electric connection, even arrange controlling means (3) can be based on boiler water quality information with the aperture of sewage flow information regulation control valve (6).

2. The boiler water quality improvement system according to claim 1, characterized in that the first detection means (1) comprises a sampling unit, one end of which is in communication with the boiler drum (4), and an on-line analyzer, the other end of which is in communication with the on-line analyzer, for detecting the conductivity, PH and silica and phosphate content of the boiler water.

3. The boiler water quality improvement system according to claim 2, characterized in that it further comprises a dosing device (7), said dosing device (7) further comprising a dosing tank and a dosing pump, said dosing tank being in communication with said boiler drum (4) via said dosing pump.

4. A system according to claim 3, characterized in that the dosing device (7) further comprises an analysis module, which is electrically connected to the row control device (3), and which is adapted to adjust the opening of the dosing pump by means of the phosphate content in the water obtained by the row control device (3).

5. The boiler water quality improvement system according to claim 1, characterized in that the second detecting device (2) includes a throttle member (21), a pressure transmitter (22) and a differential pressure transmitter (23), the throttle member (21) is provided on a downstream side of the control valve (6) in a flow path direction, the throttle member (21) is communicated with the sewage discharge pipe (5), and the pressure transmitter (22) and the differential pressure transmitter (23) are provided on the throttle member (21) and electrically connected with the continuous-line control device (3).

6. The system according to claim 5, characterized in that it further comprises a row of expanders (8), said row of expanders (8) being in communication with said sewage discharge line (5), said row of expanders (8) being disposed on a downstream side of said throttling element (21) in a flow velocity direction.

7. The system according to claim 6, further comprising a drain pipe (9), the drain pipe (9) being in communication with the sewage discharge pipe (5), the drain pipe (9) being provided on a downstream side of the row of expansion vessels (8) in a flow path direction.