CN217646176U - System for online monitoring pH of waste steam of tube bundle at 100 ℃ and adjusting alkali adding amount in real time - Google Patents
System for online monitoring pH of waste steam of tube bundle at 100 ℃ and adjusting alkali adding amount in real time Download PDFInfo
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- CN217646176U CN217646176U CN202221747440.XU CN202221747440U CN217646176U CN 217646176 U CN217646176 U CN 217646176U CN 202221747440 U CN202221747440 U CN 202221747440U CN 217646176 U CN217646176 U CN 217646176U
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Abstract
The utility model relates to the waste steam treatment field, in particular to a system for monitoring the PH of the tube bundle waste steam at 100 ℃ on line and adjusting the alkali adding amount in real time, wherein the bottom of a steam washing tower is filled with water; a spray header is arranged in the steam washing tower; two ends of the circulating water pipe are respectively communicated with the spray header and water at the bottom of the steam washing tower; a circulating water pump is arranged on a pipeline of the circulating water pipe and used for conveying water at the bottom of the steam washing tower to the spray header; the waste steam inlet pipe is communicated with the steam washing tower; the water replenishing pump is used for adding water to the circulating water pipe; a water inlet of the alkali water pump is communicated with an alkali water tank, and a water outlet of the alkali water pump is communicated with a circulating water pipe; one end of the steam outlet pipe is communicated with the top of the steam washing tower, and the other end of the steam outlet pipe is communicated with equipment for secondarily utilizing high-temperature waste steam; the steam outlet pipe is sequentially communicated with the cooling pipe, the sample water valve and the sample water tank, and the online PH sensor is positioned in the sample water tank; after high-temperature waste steam is condensed into low-temperature water, the PH value of condensed water is detected by an online PH meter.
Description
Technical Field
The utility model relates to a waste steam field of handling, in particular to on-line monitoring 100 ℃ of tube bank waste steam PH and real-time adjustment add alkali volume system.
Background
The temperature of the exhausted steam of the tube bundle dryer is up to 100 ℃, and the exhausted steam contains SO 2 The gas is acidic; the high-temperature and acidic waste steam has strong corrosivity on equipment for secondary utilization of the waste steam.
In the prior art, waste steam is introduced into a spray tower, and is sprayed by alkaline water, the alkaline water and acidic substances in the waste steam keep the pH value of the washed water steam to be more than or equal to 7.5.
However, the existing on-line pH meter is used at the temperature of 0-60 ℃, but the temperature of the waste steam is as high as 100 ℃; therefore, the pH meter cannot be used for on-line detection of the pH value of the exhaust gas at 100 ℃.
SUMMERY OF THE UTILITY MODEL
To "in the steam waste in-process of handling 100 ℃, the shortcoming of the unable PH value that detects the steam waste of current online PH meter" among the prior art, the utility model provides an on-line monitoring 100 ℃ of tube bank steam waste PH and real-time regulation add alkali volume system, through behind the steam waste condensation that becomes microthermal water with the high temperature, realize detecting the PH value of comdenstion water with online PH meter.
In order to achieve the purpose of the utility model, the utility model adopts the technical scheme that:
the system comprises a steam washing tower, a liquid level sensing device, a control cabinet, a circulating water pump, a sewage draining pump, a water replenishing pump, a cooling pipe, a sample water valve, a sample water tank, an online pH sensor, an alkaline water tank, an alkaline adding amount control box, an alkaline water pump, a circulating water pipe, a steam outlet pipe, an exhaust gas inlet pipe and a cooler, wherein the system is used for monitoring the PH of the pipe bundle waste steam at 100 ℃ on line and adjusting the alkaline adding amount in real time;
the bottom of the steam washing tower is filled with water; a spray header is arranged in the steam washing tower; two ends of the circulating water pipe are respectively communicated with the spray header and water at the bottom of the steam washing tower; a circulating water pump is arranged on a pipeline of the circulating water pipe and used for conveying water at the bottom of the steam washing tower to the spray header;
the waste steam inlet pipe is communicated with the steam washing tower;
the water replenishing pump is used for adding water to the circulating water pipe;
the water inlet of the alkali water pump is communicated with the alkali water tank, and the water outlet of the alkali water pump is communicated with the circulating water pipe;
one end of the steam outlet pipe is communicated with the top of the steam washing tower, and the other end of the steam outlet pipe is communicated with equipment for secondarily utilizing high-temperature waste steam;
the steam outlet pipe is communicated with the cooling pipe, the sample water valve and the sample water tank in sequence, and the online PH sensor is positioned in the sample water tank.
Furthermore, a cooler is arranged on a pipeline between the cooling pipe and the sample water valve.
Furthermore, an overflow port is formed in the sample water tank, and condensed water flows out of the overflow port.
Further, an inlet of a sewage discharge water pump is communicated with the bottom of the steam washing tower, and an outlet of the sewage discharge water pump is communicated with a sewage discharge ditch.
Furthermore, the liquid level sensing device consists of an upper liquid level sensor and a lower liquid level sensor, and two detection points of the liquid level sensing device are positioned in the steam washing tower; the control cabinet is respectively and electrically communicated with the liquid level sensing device, the circulating water pump, the sewage draining pump and the water replenishing pump; when the liquid level in the steam washing tower is lower than the liquid level sensor at the lower side, the control cabinet controls the water replenishing pump to replenish a new water source; when the liquid level in the steam washing tower reaches the liquid level sensor at the upper side, the control cabinet stops the water replenishing pump to replenish a new water source.
Further, an alkali adding amount control box is electrically connected with the online PH sensor and the alkali water pump; and the alkali adding amount control box is used for adjusting the on-off or flow of the alkali water pump in real time according to the electric signal of the on-line PH sensor.
The utility model has the advantages that:
the waste steam is condensed and liquefied through the cooling pipe 7, the condensed liquid can also pass through the cooler 17 to reduce the temperature of the condensed water to reach 0-60 ℃, and the condensed liquid (0-60 ℃) enters the sample water tank 9; the on-line pH sensor 10 detects the pH value of the condensed liquid; condensing and liquefying the waste steam with the temperature higher than 60 ℃ through a cooling pipe 7 or a cooler 17 to form condensed water with the temperature lower than 60 ℃, directly detecting the pH value of the condensed water by an online pH sensor 10, and adjusting the flow of alkaline water conveyed by an alkaline water pump 13 according to the pH value; the PH value of condensed water (namely phase-change waste steam) is detected by an online PH meter after high-temperature waste steam is condensed into low-temperature water.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention;
reference symbol comparison table:
the system comprises a steam washing tower 1, a liquid level sensing device 2, a control cabinet 3, a sewage draining pump 5, a water replenishing pump 6, a cooling pipe 7, a sample water valve 8, a sample water tank 9, an online pH sensor 10, an alkaline water tank 11, an alkaline water adding amount control box 12, an alkaline water pump 13, a circulating water pipe 14 and a steam outlet pipe 15.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that as used in the following description, the terms "front," "back," "left," "right," "upper" and "lower" refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
In order to make the content of the present invention more clearly understood, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the attached drawings in the embodiment of the present invention.
The system comprises a steam washing tower 1, a liquid level sensing device 2, a control cabinet 3, a circulating water pump 4, a sewage pump 5, a water replenishing pump 6, a cooling pipe 7, a sample water valve 8, a sample water tank 9, an online pH sensor 10, an alkaline water tank 11, an alkaline adding amount control box 12, an alkaline water pump 13, a circulating water pipe 14, a steam outlet pipe 15, an exhaust steam inlet pipe 16 and a cooler 17;
the bottom of the steam washing tower 1 is filled with water; a spray header is arranged in the steam washing tower 1; two ends of the circulating water pipe 14 are respectively communicated with the spray header and water at the bottom of the steam washing tower 1; and a circulating water pump 4 is arranged on a pipeline of the circulating water pipe 14, and the circulating water pump 4 is used for conveying water at the bottom of the steam washing tower 1 to a spray header.
The waste steam inlet pipe 16 is communicated with the steam washing tower 1; the waste steam enters the steam washing tower 1 through a waste steam inlet pipe 16.
The water replenishing pump 6 is used for adding water to the circulating water pipe 14; namely, the water inlet end of the water replenishing pump 6 is communicated with a water source, and the water outlet end of the water replenishing pump 6 is communicated with the circulating water pipe 14;
a water inlet of the alkaline water pump 13 is communicated with an alkaline water tank 11 (NaOH), and a water outlet of the alkaline water pump 13 is communicated with a circulating water pipe 14;
one end of the steam outlet pipe 15 is communicated with the top of the steam washing tower 1, and the other end of the steam outlet pipe 15 is communicated with equipment for secondarily utilizing high-temperature waste steam. The waste steam sprayed by the alkaline liquid enters the equipment for secondarily utilizing the high-temperature waste steam through the steam outlet pipe 15.
The steam outlet pipe 15 is sequentially communicated with the cooling pipe 7, the sample water valve 8 and the sample water tank 9, and the online pH sensor 10 is positioned in the sample water tank 9; preferably, a cooler 17 is installed on a pipeline between the cooling pipe 7 and the sample water valve 8.
The principle is as follows: the waste steam is condensed and liquefied through the cooling pipe 7, the condensed liquid can also pass through the cooler 17 to reduce the temperature of the condensed water to reach 0-60 ℃, and the condensed liquid (0-60 ℃) enters the sample water tank 9; the on-line pH sensor 10 detects the pH value of the condensed liquid; condensing and liquefying the waste steam with the temperature higher than 60 ℃ through a cooling pipe 7 or a cooler 17 to form condensed water with the temperature lower than 60 ℃, directly detecting the pH value of the condensed water by an online pH sensor 10, and adjusting the flow of alkaline water conveyed by an alkaline water pump 13 according to the pH value; the PH value of condensed water (namely phase-change waste steam) is detected by an online PH meter after high-temperature waste steam is condensed into low-temperature water.
Furthermore, an overflow port is formed in the sample water tank 9, and condensed water flows out of the overflow port.
Further, the inlet of the sewage pump 5 is communicated with the bottom of the steam washing tower 1, and the outlet of the sewage pump 5 is communicated with the sewage drain.
Further, the liquid level sensing device 2 is composed of an upper liquid level sensor and a lower liquid level sensor, and two detection points of the liquid level sensing device 2 are positioned in the steam washing tower 1; the control cabinet (PLC control cabinet) 3 is respectively and electrically communicated with the liquid level sensing device 2, the circulating water pump 4, the sewage discharge pump 5 and the water replenishing pump 6; when the liquid level in the steam washing tower 1 is lower than the liquid level sensor at the lower side, the control cabinet 3 controls the water replenishing pump 6 to replenish a new water source; when the liquid level in the steam washing tower 1 reaches the liquid level sensor at the upper side, the control cabinet 3 stops the water replenishing pump 6 from replenishing new water source.
In addition, when the concentration of Na2SO3 in the steam-washing water rises along with the time and needs to be kept lower than the upper concentration limit, the control cabinet 3 controls the operation of the sewage pump 5 and the water replenishing pump 6 to discharge a certain amount of concentrated water and replenish fresh water into the steam-washing tower 1, SO that the water level and the concentration of Na2SO3 are kept normal.
Further, an alkali adding amount control box (controller) 12 is electrically connected with the online pH sensor 10 and an alkali water pump 13; the alkali adding amount control box 12 is used for adjusting the on-off or flow of the alkali water pump 13 in real time according to the electric signal of the online pH sensor 10.
The method for measuring the PH value of the exhaust gas at 100 ℃ by the online PH sensor with the working environment less than or equal to 60 ℃ comprises the following steps:
s1, assembling a steam washing tower 1, a liquid level sensing device 2, a control cabinet 3, a circulating water pump 4, a sewage draining water pump 5, a water replenishing pump 6, a cooling pipe 7, a sample water valve 8, a sample water tank 9, an online PH sensor 10, an alkaline water tank 11, an alkaline adding amount control box 12, an alkaline water pump 13, a circulating water pipe 14, a steam outlet pipe 15, an exhaust gas inlet pipe 16 and a cooler 17 according to the system;
s2, adjusting the length of the cooling pipe 7 to ensure that the cooling pipe 7 liquefies the high-temperature waste steam into cooling water at the temperature of less than 60 ℃; making it a normal operating environment for the on-line PH sensor 10.
S3, regulating the flow of sample water through a sample water valve 8;
s4, measuring the pH value of the cooling water by the online pH sensor 10, and transmitting an electric signal to the alkali adding amount control box 12 by the online pH sensor 10;
s5, setting the relation between the PH value and the alkali adding water amount;
and S6, comparing the received signal sent by the PH sensor with a set value, and adjusting the rotation speed of the alkali adding pump, namely adjusting the alkali adding water quantity by the alkali adding control box, so that the PH value of the washed steam is kept in a range to be controlled.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and all modifications, equivalents, improvements and the like that are made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. A system for on-line monitoring the PH of the waste steam of a tube bundle at 100 ℃ and adjusting the alkali adding amount in real time, which is characterized in that,
the system comprises a steam washing tower, a liquid level sensing device, a control cabinet, a circulating water pump, a sewage draining water pump, a water replenishing pump, a cooling pipe, a sample water valve, a sample water tank, an online PH sensor, an alkaline water tank, an alkaline adding amount control box, an alkaline water pump, a circulating water pipe, a steam outlet pipe, an exhaust gas inlet pipe and a cooler;
the lower part of the steam washing tower is filled with circulating steam washing water; a spray header is arranged in the steam washing tower; two ends of the circulating water pipe are respectively communicated with the spray header and water at the bottom of the steam washing tower; a circulating water pump is arranged on a pipeline of the circulating water pipe and used for conveying water at the bottom of the steam washing tower to the spray header;
the waste steam inlet pipe is communicated with the steam washing tower;
the water replenishing pump is used for adding water to the circulating water pipe;
the water inlet of the alkali water pump is communicated with the alkali water tank, and the water outlet of the alkali water pump is communicated with the circulating water pipe;
one end of the steam outlet pipe is communicated with the top of the steam washing tower, and the other end of the steam outlet pipe is communicated with equipment for secondarily utilizing high-temperature waste steam;
the steam outlet pipe is communicated with the cooling pipe, the sample water valve and the sample water tank in sequence, and the online PH sensor is positioned in the sample water tank.
2. The system for on-line monitoring the PH of the bundle waste steam at 100 ℃ and adjusting the alkali adding amount in real time as claimed in claim 1,
and a cooler is arranged on a pipeline between the cooling pipe and the sample water valve.
3. The system for on-line monitoring the PH of the waste steam of the tube bundle at 100 ℃ and adjusting the alkali adding amount in real time as claimed in claim 1,
the sample water tank is provided with an overflow port, and condensed water flows out of the overflow port.
4. The system for on-line monitoring the PH of the waste steam of the tube bundle at 100 ℃ and adjusting the alkali adding amount in real time as claimed in claim 1,
the inlet of the sewage pump is communicated with the bottom of the steam washing tower, and the outlet of the sewage pump is communicated with the sewage ditch.
5. The system for on-line monitoring the PH of the bundle waste steam at 100 ℃ and adjusting the alkali adding amount in real time as claimed in claim 1,
the upper and lower interfaces of the liquid level sensing device are communicated with the steam washing tower, and the lower interface is connected below the circulating water surface in the steam washing tower; the liquid level sensing device is provided with an upper limit detection point and a lower limit detection point; the control cabinet is respectively and electrically communicated with the liquid level sensing device, the circulating water pump, the sewage draining pump and the water replenishing pump; when the liquid level in the steam washing tower is lower than the lower limit switching value point of the liquid level sensing device, the control cabinet controls the water replenishing pump to replenish a new water source; when the liquid level in the steam washing tower reaches the upper limit switching value point of the liquid level sensing device, the control cabinet stops the water replenishing pump from replenishing new water source;
or the water replenishing pump uses a variable frequency pump, the control cabinet is provided with a constant water point in the steam washing tower, and the control cabinet adjusts the rotating speed of the water replenishing pump according to a water level signal sent by the liquid level sensing device to change the water replenishing amount so as to keep the water level in the steam washing tower.
6. The system for on-line monitoring the PH of the waste steam of the tube bundle at 100 ℃ and adjusting the alkali adding amount in real time as claimed in claim 5,
the alkali adding amount control box is electrically connected with the online PH sensor and the alkali water pump; and the alkali adding amount control box is used for adjusting the on-off or flow of the alkali water pump in real time according to the electric signal of the on-line PH sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221747440.XU CN217646176U (en) | 2022-07-06 | 2022-07-06 | System for online monitoring pH of waste steam of tube bundle at 100 ℃ and adjusting alkali adding amount in real time |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221747440.XU CN217646176U (en) | 2022-07-06 | 2022-07-06 | System for online monitoring pH of waste steam of tube bundle at 100 ℃ and adjusting alkali adding amount in real time |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217646176U true CN217646176U (en) | 2022-10-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221747440.XU Active CN217646176U (en) | 2022-07-06 | 2022-07-06 | System for online monitoring pH of waste steam of tube bundle at 100 ℃ and adjusting alkali adding amount in real time |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217646176U (en) |
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2022
- 2022-07-06 CN CN202221747440.XU patent/CN217646176U/en active Active
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