CN213686765U - Quality-improving and energy-saving system for water in industrial boiler - Google Patents
Quality-improving and energy-saving system for water in industrial boiler Download PDFInfo
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- CN213686765U CN213686765U CN202022493859.4U CN202022493859U CN213686765U CN 213686765 U CN213686765 U CN 213686765U CN 202022493859 U CN202022493859 U CN 202022493859U CN 213686765 U CN213686765 U CN 213686765U
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Abstract
The utility model discloses an industrial boiler water quality upgrading energy-saving system, through being equipped with the drain of connecting continuous blowdown flow throttling arrangement in boiler drum bottom, boiler drum dosing opening has charge device through the pipe connection, the detection mouth of boiler drum has soda sampling device through the pipe connection, soda sampling device is connected with the chemical on-line analysis instrument of analysis boiler water quality, install incoming flow pressure and differential pressure transmitter on the continuous blowdown flow throttling arrangement, utilize the chemical on-line analysis instrument to obtain boiler water quality in the boiler drum, the controller utilizes the incoming flow pressure and the differential pressure of transmitter to combine the drum pressure signal to obtain drain blowdown flow size in real time, adjust the charge amount and the blow off volume in real time through control valve and charge device and reach the purpose of adjusting boiler water quality in the boiler drum, the device is simple in structure, can in time observe the boiler water quality in the boiler, the system achieves the purpose of quickly adjusting the quality of the furnace water, thereby achieving the purposes of improving the quality of the furnace water and saving energy.
Description
Technical Field
The utility model belongs to the technical field of thermal power plant's boiler, concretely relates to quality of industrial boiler stove water improves matter economizer system.
Background
At present, the control of boiler water quality of thermal power plants in China mostly adopts modes of manual chemical examination, manual chemical feeding, manual operation of boiler discharge and the like, and because the manual chemical examination error is large, human factors such as untimely adjustment and irregular adjustment of the manual chemical feeding and the manual operation of the boiler discharge are large, the boiler water quality is directly influenced, the fluctuation of boiler water quality indexes is large, and the phenomena of exceeding standard, excessive discharge and high grade heat waste of the boiler water are caused. The quality of furnace water exceeding standard directly affects the quality of steam, and adverse phenomena such as acid and alkali corrosion or scaling and pipe explosion of thermal equipment can occur in serious cases, so that the stability and safety of the operation of a power plant are affected; the super exhaust can generate heat and waste in the aspect of working media, and the economical efficiency of the operation of a power plant is influenced. Therefore, the interference of human factors is urgently needed to be eliminated, the quality of the boiler water is strictly controlled, the accidents of boiler pipelines and related equipment are prevented, and the unnecessary waste of the high-temperature boiler water is avoided.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an industrial boiler water quality improves matter economizer system to overcome prior art's not enough.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an industrial boiler water quality-improving energy-saving system comprises a boiler steam drum, wherein the bottom of the boiler steam drum is provided with a sewage discharge port connected with a continuous sewage discharge flow throttling device; the boiler steam drum one side has been seted up with medicine mouth and detection mouth, the medicine mouth that adds of boiler steam drum has charge device through the pipe connection, the detection mouth of boiler steam drum has soda sampling device through the pipe connection, soda sampling device is connected with the chemistry on-line analysis instrument who is used for the analysis boiler quality of water, pressure sample mouth and pressure differential sample mouth have been seted up on the continuous blowdown flow throttling arrangement, the pressure sample mouth of continuous blowdown flow throttling arrangement is connected with the incoming flow pressure transmitter who is used for detecting continuous blowdown flow throttling arrangement entrance point, the pressure differential sample mouth of continuous blowdown flow throttling arrangement is connected with the differential pressure transmitter who is used for detecting the continuous blowdown flow throttling arrangement pressure differential signal of flowing through.
Further, the system also comprises a controller connected with the incoming flow pressure transmitter, the differential pressure transmitter, the chemical online analyzer and the dosing device.
Furthermore, a first control valve is arranged on a pipeline connecting the boiler steam drum and the continuous blowdown flow throttling device; and a second control valve is arranged on a pipeline for connecting the boiler steam drum and the chemical adding device, and a third control valve is arranged on a pipeline for connecting the boiler steam drum and the steam-water sampling device.
Further, the dosing device comprises a dosing pump and a dosing tank.
Furthermore, a drain outlet of the continuous blowdown flow throttling device is connected with a continuous blowdown flash tank, and an outlet of the continuous blowdown flash tank is provided with a fourth control valve.
Furthermore, the continuous sewage discharge flow throttling device comprises a throttling ring, a left pipe body and a right pipe body, the throttling ring is fixed between the left pipe body and the right pipe body, the left pipe body and the right pipe body are identical in structure, and a throttling hole is formed in the throttling ring.
Furthermore, the left pipe body adopts a double-layer pipe structure, an inner pipe at one end of the left pipe body is connected with a sewage discharge outlet of a boiler steam drum through a pipeline, the inner wall of an outer pipe at the other end of the left pipe body is in threaded connection with a throttling ring, the end part of the throttling ring is not in contact with the inner pipe end at the other end of the left pipe body, and a pressure stabilizing area is formed among the inner pipe of the left pipe body, the outer pipe of the left pipe body and the throttling ring.
Further, the controller adopts an S7-200 series programmable logic controller selected from Siemens.
Compared with the prior art, the utility model discloses following profitable technological effect has:
the utility model relates to an industrial boiler water quality upgrading economizer system, through being equipped with the drain of connecting continuous blowdown flow throttling arrangement in boiler drum bottom, seted up with medicine mouth and detection mouth in boiler drum one side, the medicine mouth of boiler drum is connected with charge device through the pipeline, the detection mouth of boiler drum is connected with soda sampling device through the pipeline, soda sampling device is connected with the chemical on-line analysis instrument who is used for analyzing boiler water quality, seted up pressure sample connection and pressure differential sample connection on the continuous blowdown flow throttling arrangement, the pressure sample connection of continuous blowdown flow throttling arrangement is connected with the incoming flow pressure transmitter who is used for detecting the inlet end of continuous blowdown flow throttling arrangement, the pressure differential sample connection of continuous blowdown flow throttling arrangement is connected with the differential pressure transmitter who is used for detecting the differential pressure signal of flowing through continuous blowdown flow throttling arrangement, utilize chemical on-line analysis instrument to obtain the boiler water quality in the boiler drum, then utilize and flow pressure transmitter and differential pressure transmitter to combine the steam pocket pressure signal to acquire drain blowdown flow size in real time, thereby adjust the purpose that adds the medicine and reach the interior boiler water quality of regulation boiler steam pocket through charge device, this device simple structure can in time observe the interior boiler water quality of stove, reaches the purpose of quick adjustment boiler water quality through charge device and control boiler water blowdown volume to reach energy-conserving purpose.
Further, the device also comprises a controller connected with an incoming flow pressure transmitter, a differential pressure transmitter, a chemical on-line analyzer and a dosing device, wherein the controller uses the incoming flow pressure transmitter and the differential pressure transmitter to obtain the pressure and the differential pressure of the sewage discharge in real time and then calculates the current sewage discharge flow in real time through a specific steam-liquid two-phase flow algorithm by combining the current steam pocket pressure with the current steam pocket pressure, the controller controls the opening of the valve in real time by comparing a preset chemical index threshold value with the current actual chemical index value, and the controller adjusts the dosing amount of the dosing device through the current boiler water index so as to achieve the purpose of adjusting the boiler water quality in the boiler steam pocket, the device has simple structure and can observe the boiler water quality in the boiler in time, the aim of quickly adjusting the quality of furnace water is achieved by the aid of the dosing device and the furnace water discharge amount control device, so that the aim of saving energy is fulfilled, response speed is high, and results are accurate.
Furthermore, the left pipe body adopts a double-layer pipe structure, an inner pipe at one end of the left pipe body is connected with a sewage discharge outlet of a boiler steam drum through a pipeline, the inner wall of an outer pipe at the other end of the left pipe body is connected with a throttling ring through threads, the end part of the throttling ring is not contacted with the end of the inner pipe at the other end of the left pipe body, and a pressure stabilizing area is formed among the inner pipe of the left pipe body, the outer pipe of the left pipe body and the throttling ring, so that water entering the continuous sewage discharge flow throttling device is prevented from swinging at a pressure sampling opening to; the left pipe body and the right pipe body which have the same structure are adopted, and the pressure stabilizing areas are formed on the two sides of the throttling ring, so that the differential pressure transmitter can measure the pressure difference value passing through the continuous sewage discharge flow throttling device more stably, the detection precision is improved, and the control precision can be improved.
Drawings
Fig. 1 is a schematic structural diagram in an embodiment of the present invention.
Fig. 2 is a schematic structural view of the continuous blowdown flow throttling device in the embodiment of the present invention.
Fig. 3 is a schematic view of the throttle ring structure of the present invention.
Fig. 4 is a sectional view of the throttle ring structure of the present invention.
Wherein, 1, boiler drum; 2. a dosing device; 3. a steam-water sampling device; 4. a chemical on-line analyzer; 5. a continuous blowdown flow throttling device; 6. a controller; 7. an incoming flow pressure transmitter; 8. a differential pressure transmitter; 9. a first control valve; 10. a second control valve; 11. a third control valve; 12. a connected flash tank; 13. a fourth control valve; 14. a dosing box; 15. a left tubular body; 16. a right tube body; 17. a restrictor ring; 18. and a diversion trench.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
as shown in figure 1, the quality-improving and energy-saving system for the water of the industrial boiler comprises a boiler drum 1 and a controller 6, wherein the bottom of the boiler drum 1 is provided with a sewage discharge port connected with a continuous sewage discharge flow throttling device 5; a dosing port and a detection port are arranged on one side of a boiler steam drum 1, the dosing port of the boiler steam drum 1 is connected with a dosing device 2 through a pipeline, the detection port of the boiler steam drum 1 is connected with a steam-water sampling device 3 through a pipeline, the steam-water sampling device 3 is connected with a chemical on-line analysis instrument 4 for analyzing the water quality of the boiler, a pressure sampling port and a differential pressure sampling port are arranged on a continuous blowdown flow throttling device 5, the pressure sampling port of the continuous blowdown flow throttling device 5 is connected with an incoming flow pressure transmitter 7 for detecting the inlet end of the continuous blowdown flow throttling device 5, the differential pressure sampling port of the continuous blowdown flow throttling device 5 is connected with a differential pressure transmitter 8 for detecting the differential pressure signal flowing through the continuous blowdown flow throttling device 5, the incoming flow pressure transmitter 7 and the, the chemical online analysis instrument 4 and the dosing device 2 are both connected to the controller 6.
A first control valve 9 is arranged on a pipeline connecting the boiler steam drum 1 and the continuous blowdown flow throttling device 5; a second control valve 10 is arranged on a pipeline connecting the boiler steam drum 1 and the chemical adding device 2, and a third control valve 11 is arranged on a pipeline connecting the boiler steam drum 1 and the steam-water sampling device 3.
The dosing device 2 comprises a dosing pump and a dosing tank 14, and the dosing tank 14 is used for storing liquid medicine.
As shown in fig. 2, a drain outlet of the continuous blowdown flow rate throttling device 5 is connected with a continuous blowdown flash tank 12, and an outlet of the continuous blowdown flash tank 12 is provided with a fourth control valve 13.
The continuous sewage flow throttling device 5 comprises a throttling ring 17, a left pipe body 15 and a right pipe body 16, the throttling ring 17 is fixed between the left pipe body 15 and the right pipe body 16, the left pipe body 15 and the right pipe body 16 are identical in structure, and a throttling hole is formed in the throttling ring 17. The left pipe body 15 is of a double-layer pipe structure, an inner pipe at one end of the left pipe body 15 is connected with a sewage discharge port of the boiler steam drum 1 through a pipeline, the inner wall of an outer pipe at the other end of the left pipe body 15 is connected with the throttling ring 17 through threads, the end part of the throttling ring 17 is not contacted with the inner pipe end at the other end of the left pipe body 15, and a pressure stabilizing area is formed among the inner pipe of the left pipe body 15, the outer pipe of the left pipe body 15 and the throttling ring 17, so that water entering the continuous sewage discharge flow throttling device 5 is prevented from swinging at a pressure sampling; the left pipe body 15 and the right pipe body 16 which have the same structure are adopted, pressure stabilizing areas are formed on two sides of the throttling ring 17, the pressure difference value after passing through the continuous sewage discharge flow throttling device 5 can be improved, and the detection precision is improved. The throttling ring 17 is an annular opening throttling ring, and an inclined groove is arranged on one side of an opening of the throttling ring 17. Or the throttle ring 17, the left tube body 15 and the right tube body 16 are connected by welding, so that the sealing performance is high.
As shown in fig. 3 and 4, the diversion trench 18 is arranged on the outer ring of the throttling opening of the throttling ring 17, and the diversion trench 18 is arranged along the radial direction of the throttling ring 17, so that the furnace water which passes through the throttling ring 17 is guided into the pressure stabilizing area.
A measuring sensor of the chemical on-line analysis instrument 4 is arranged on a pipeline of the steam-water sampling device 5 to detect the chemical indexes of the furnace water; one end of the steam-water sampling device 5 is connected with the boiler steam drum 1 through a primary door, and the other end is connected with a sewage discharge pipeline and led to a sewage discharge trench.
The first control valve 9 adopts an electric regulating valve or a pneumatic regulating valve, and the first control valve 9 is connected with the controller 6; the purpose of quick response control is realized; according to the actual conditions of each factory, the electric regulating valve or the pneumatic regulating valve is selected to adjust the boiler exhaust emission, and the valve spare parts and the valve overhaul and maintenance cost are reduced. The second control valve 10, the third control valve 11 and the fourth control valve 13 are all manual valves.
The controller 6 adopts an S7-200 series programmable logic controller selected from Siemens company to improve the reliability and stability of the control system.
An incoming flow pressure transmitter 7 and a differential pressure transmitter 8 which are connected with the continuous blowdown flow throttling device 5 acquire the incoming flow pressure of the flow passing through the continuous blowdown flow throttling device 5 and the differential pressure value of the flow passing through the continuous blowdown flow throttling device 5, then convert the two signals into 4-20ma signals and send the signals to a controller 6, the current instantaneous flow is acquired through a vapor-liquid two-phase flow algorithm, the system automatically performs flow accumulation, and an operator knows the current instantaneous blowdown flow and the accumulated flow in real time through an operation picture of the boiler water quality improvement blowdown control energy-saving cabinet.
For further understanding of the present invention, a description will now be made of the working principle thereof.
Boiler water in a boiler steam drum 1 enters a steam-water sampling device 3 through a valve, the boiler water is subjected to temperature and pressure regulation by the steam-water sampling device 3 (the pressure is less than or equal to 0.15MPa, and the temperature is 25 +/-1 ℃) and then is supplied to a chemical online analysis instrument 4 for water quality analysis, redundant sample water is discharged into a trench through a drain outlet of the steam-water sampling device 6, the chemical online analysis instrument 4 sends a real-time measurement result to a controller 6, the controller 6 compares values sent by the chemical online analysis instrument 4 according to a set threshold value, if the chemical values are within a boiler water control index range, the controller 6 sends a signal to a first control valve 9, the opening of the first control valve 9 is reduced, and boiler water heat and water waste are saved. If the chemical measurement value exceeds the range of the boiler water control index, the controller 6 respectively sends signals to the dosing device 2 and the first control valve 9 according to the set deviation value, the dosing amount of the dosing device 2 is reduced, the opening degree value of the first control valve 9 is increased, unqualified boiler water is automatically discharged, and the safety of a boiler steam drum is ensured. The discharged furnace water enters a continuous discharge flash tank for heat recovery after passing through a continuous blowdown flow throttling device 5, an incoming flow pressure transmitter and a differential pressure transmitter which are arranged below the continuous blowdown flow throttling device 5 acquire the incoming flow pressure of the flow passing through the throttling device and the differential pressure value of the flow passing through the throttling device, then convert the two signals into 4-20ma signals and send the signals to a controller 6, the controller 6 is arranged in a furnace water quality-improving blowdown control energy-saving cabinet system, the controller 6 combines the current steam pocket pressure value, obtains the current instantaneous flow output on an operation interface through calculation of a specific steam-liquid two-phase flow algorithm, and simultaneously the calculated instantaneous flow can be used as feedback quantity to be sent to the system for participating in control; the system automatically accumulates the flow, the operation interface displays the current furnace water related chemical index, the valve opening, the flow instantaneous flow and the accumulated flow, and the control mode switching key, if the furnace water analysis and pollution discharge control energy-saving cabinet needs to be isolated, the isolation system can be completed by clicking the control mode key, and the valve opening is manually controlled. If the automatic dosing control cabinet in the controller 6 needs to be isolated, the new control knob is turned to the old control cabinet on the cabinet surface, the starting button is pressed on the electric cabinet of the original dosing device, and dosing is continuously carried out in the original manual frequency setting mode. The flow accumulating function is arranged in the program of the controller 6, so that reliable basis is provided for calculating the saving amount of boiler water and the production efficiency of the whole production device.
Claims (8)
1. The quality-improving and energy-saving system for the water of the industrial boiler is characterized by comprising a boiler steam drum (1), wherein the bottom of the boiler steam drum (1) is provided with a sewage discharge outlet connected with a continuous sewage discharge flow throttling device (5); boiler drum (1) one side has been seted up with medicine mouth and detection mouth, the medicine mouth that adds of boiler drum (1) has charge device (2) through the pipe connection, the detection mouth of boiler drum (1) has soda sampling device (3) through the pipe connection, soda sampling device (3) are connected with chemical on-line analysis instrument (4) that are used for the analysis boiler quality of water, pressure sample connection and pressure difference sample connection have been seted up on continuous blowdown flow throttling arrangement (5), the pressure sample connection of continuous blowdown flow throttling arrangement (5) is connected with incoming flow pressure transmitter (7) that are used for detecting continuous blowdown flow throttling arrangement (5) entrance point, the pressure difference sample connection of continuous blowdown flow throttling arrangement (5) is connected with differential pressure transmitter (8) that are used for detecting continuous blowdown flow throttling arrangement (5) differential pressure signal of flowing through.
2. The system for upgrading and saving the quality of the water in the industrial boiler according to claim 1, further comprising a controller (6) connected to the incoming flow pressure transmitter (7), the differential pressure transmitter (8), the chemical on-line analysis instrument (4) and the dosing device (2).
3. The system for improving quality and saving energy of water in the industrial boiler according to claim 1, wherein a first control valve (9) is arranged on a pipeline connecting the boiler drum (1) and the continuous blowdown flow throttling device (5); a second control valve (10) is arranged on a pipeline connecting the boiler steam drum (1) and the chemical adding device (2), and a third control valve (11) is arranged on a pipeline connecting the boiler steam drum (1) and the steam-water sampling device (3).
4. The system for upgrading and saving the quality of the water of the industrial boiler according to claim 1, wherein the dosing device (2) comprises a dosing pump and a dosing tank (14).
5. The system for improving quality of water and saving energy of the industrial boiler according to claim 1, wherein a drain outlet of the continuous sewage flow throttling device (5) is connected with a continuous discharge flash tank (12), and an outlet of the continuous discharge flash tank (12) is provided with a fourth control valve (13).
6. The system for improving quality and saving energy of water of the industrial boiler according to claim 1, wherein the continuous blowdown flow throttling device (5) comprises a throttling ring (17), a left pipe body (15) and a right pipe body (16), the throttling ring (17) is fixed between the left pipe body (15) and the right pipe body (16), the left pipe body (15) and the right pipe body (16) are identical in structure, and a throttling hole is formed in the throttling ring (17).
7. The system for improving quality of water and saving energy of the industrial boiler furnace according to claim 6, wherein the left pipe body (15) is of a double-layer pipe structure, an inner pipe at one end of the left pipe body (15) is connected with a sewage discharge port of the boiler drum (1) through a pipeline, the inner wall of an outer pipe at the other end of the left pipe body (15) is connected with the throttling ring (17) through threads, the end part of the throttling ring (17) is not in contact with the inner pipe end at the other end of the left pipe body (15), and a pressure stabilizing area is formed among the inner pipe of the left pipe body (15), the outer pipe of the left pipe body (15) and the throttling ring (17).
8. The system for upgrading and saving the quality of the water of the industrial boiler as claimed in claim 2, wherein the controller (6) is a programmable logic controller selected from the series S7-200 of Siemens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022493859.4U CN213686765U (en) | 2020-11-02 | 2020-11-02 | Quality-improving and energy-saving system for water in industrial boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022493859.4U CN213686765U (en) | 2020-11-02 | 2020-11-02 | Quality-improving and energy-saving system for water in industrial boiler |
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| CN213686765U true CN213686765U (en) | 2021-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022493859.4U Active CN213686765U (en) | 2020-11-02 | 2020-11-02 | Quality-improving and energy-saving system for water in industrial boiler |
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| CN (1) | CN213686765U (en) |
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- 2020-11-02 CN CN202022493859.4U patent/CN213686765U/en active Active
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