CN115308376B - Method and equipment for online detection of PH of high-concentration and high-Wen Xiaosuan ammonium solution - Google Patents
Method and equipment for online detection of PH of high-concentration and high-Wen Xiaosuan ammonium solution Download PDFInfo
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- CN115308376B CN115308376B CN202210998841.0A CN202210998841A CN115308376B CN 115308376 B CN115308376 B CN 115308376B CN 202210998841 A CN202210998841 A CN 202210998841A CN 115308376 B CN115308376 B CN 115308376B
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G—PHYSICS
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- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/42—Low-temperature sample treatment, e.g. cryofixation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
- G01N2001/386—Other diluting or mixing processes
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Abstract
The invention discloses a method and equipment for detecting the PH of a high-concentration and high-Wen Xiaosuan ammonium solution on line, which comprises a plurality of storage tanks, a dilute ammonium nitrate solution sample preparation device and a collection funnel; the storage tanks are connected with sampling pipelines, and sampling pipe control valves are arranged on the sampling pipelines; the diluted ammonium nitrate solution sample preparation device is connected with a sampling pipeline, a diluted solution inlet pipeline and a diluted solution discharge pipeline are connected to the diluted ammonium nitrate solution sample preparation device, a diluted ammonium nitrate solution flowmeter is installed on the diluted solution discharge pipeline, a first branch pipe and a second branch pipe are arranged at the liquid outlet end of the diluted ammonium nitrate solution flowmeter, and extraction control valves are installed on the first branch pipe and the second branch pipe. The invention solves the problems of stable and accurate PH on line detection in the continuous production and storage process of high-concentration and high Wen Xiaosuan ammonium solution, eliminates the potential safety hazard caused by unstable PH control in the whole production process of ammonium nitrate solution, and has extremely strong safety demonstration significance in the ammonium nitrate production industry.
Description
Technical Field
The invention belongs to the technical field of PH detection of ammonium nitrate solution, and particularly relates to a method and equipment for detecting PH of high-concentration and high-Wen Xiaosuan ammonium solution on line.
Background
PH is a key index for the production of ammonium nitrate solution and the use of civil explosive, and directly influences the quality of ammonium nitrate solution and the quality of the prepared explosive. The temperature is above 120 ℃ in the production and storage processes of the ammonium nitrate solution, and the crystallization temperature of the ammonium nitrate solution is basically about 100 ℃, so that the ammonium nitrate solution is easy to crystallize, and the technical problem that the PH value of the ammonium nitrate solution cannot be detected on line exists.
The existing ammonium nitrate production and storage all adopt manual sampling and desalted water dilution to the concentration of the ammonium nitrate solution of 10%, and the PH detection is manually carried out, so that the detection value is accurate, but the measurement cannot be continuous, and the PH continuous stability of the produced ammonium nitrate solution cannot be ensured. The quality index of the ammonium nitrate solution (HG/T4523-2013) requires pH4.5-7.0, and the pH requirement of a plurality of downstream users of the ammonium nitrate solution is 4.5-5.0, so that the fluctuation of pH control is greatly not satisfied with the requirement of the users, and particularly when the pH is lower than 4.0, the solution is obviously acidic and can accelerate the decomposition of ammonium nitrate, so that the risk of ammonium nitrate safety is increased, and therefore, the production of the ammonium nitrate solution still has a great potential safety hazard in the control of the pH, and the continuous and stable control of the pH of the ammonium nitrate solution is enhanced.
Therefore, in order to solve the above-mentioned problems, it is necessary to provide a method and apparatus for online detecting the PH of a high Wen Xiaosuan ammonium solution.
Disclosure of Invention
The invention aims to provide a method and equipment for detecting the PH of high-concentration and high-Wen Xiaosuan ammonium solution on line so as to solve the problems in the prior art.
In order to achieve the above object, an embodiment of the present invention provides the following technical solution:
an on-line detection device for PH of high-concentration and high Wen Xiaosuan ammonium solution comprises a plurality of storage tanks, a dilute ammonium nitrate solution sample preparation device and a collection funnel;
the storage tanks are connected with sampling pipelines, and sampling pipe control valves are arranged on the sampling pipes;
the diluted ammonium nitrate solution sample preparation device is connected with the sampling pipeline, a diluted solution inlet pipeline and a diluted solution discharge pipeline are connected to the diluted ammonium nitrate solution sample preparation device, a diluted ammonium nitrate solution flowmeter is installed on the diluted solution discharge pipeline, a first branch pipe and a second branch pipe are arranged at the liquid outlet end of the diluted ammonium nitrate solution flowmeter, extraction control valves are installed on the first branch pipe and the second branch pipe, a cooler is connected to the first branch pipe, a cooling coil is arranged in the cooler, and a PH metering pipeline is connected to the cooler;
the collecting funnel is respectively connected with the branch pipe II and the PH metering pipeline, the liquid outlet end of the collecting funnel is connected with a collecting tank, a collecting tank pump is arranged on the collecting tank, and the liquid outlet end of the collecting tank pump is connected with an ammonium nitrate solution production system.
Further, the storage tank comprises an ammonium nitrate solution reactor, a high-pressure storage tank and a normal-pressure storage tank, a collecting tank is arranged on a sampling pipe of the normal-pressure storage tank, a liquid outlet end of the collecting tank is connected with a return pipe, and a plurality of sampling pipes are provided with heat insulation layers.
Further, at least two baffles are arranged in the dilute ammonium nitrate solution sample preparation device.
Further, a desalted water regulating valve, a desalted water flowmeter and a check valve are sequentially arranged on the diluent inlet pipeline from the liquid inlet direction.
Further, a PH measurement control valve and a PH measurement tank are arranged on the PH measurement pipeline, and a PH acidity meter is arranged in the PH measurement tank.
Further, a remote thermometer is further installed on the cooler, a cooling water inlet regulating valve is connected to the liquid inlet end of the cooling coil, a third branch pipe and a fourth branch pipe are arranged at the liquid outlet end of the cooling coil, the third branch pipe is connected with the diluent inlet pipeline, and a cooling water return regulating valve and a desalination water tank are installed on the fourth branch pipe.
A method for on-line detection of high concentration, high Wen Xiaosuan ammonium solution PH based on said apparatus for on-line detection of high concentration, high Wen Xiaosuan ammonium solution PH comprising the steps of:
s1, fully mixing ammonium nitrate solution sampling in an ammonium nitrate solution reactor, a high-pressure storage tank or a normal-pressure storage tank with desalted water metered by a desalted water regulating valve, a desalted water flowmeter and a check valve in a dilute ammonium nitrate solution sample preparation device to obtain dilute ammonium nitrate solution;
s2, after the diluted ammonium nitrate solution is metered by a diluted ammonium nitrate solution flowmeter, sorting and discharging, namely normally extracting the diluted ammonium nitrate solution from a branch pipe I, and extracting the ammonium nitrate solution from a branch pipe II after initial dilution;
s3, the dilute ammonium nitrate solution extracted by the branch pipe II flows into a collecting funnel, flows into a collecting tank through the collecting funnel, is recovered to an ammonium nitrate solution production system at regular time through a collecting tank pump, and the concentration of the diluted ammonium nitrate solution is kept to be about 10% by controlling the ratio of the addition of desalted water to the extraction amount of the dilute ammonium nitrate solution;
s4, after the initial liquid collection time of the dilute ammonium nitrate solution in the dilute ammonium nitrate solution sample preparation device is short, opening a first extraction control valve on a branch pipe, closing a second extraction control valve on the branch pipe, enabling the dilute ammonium nitrate solution to enter a cooler through the first branch pipe, enabling the dilute ammonium nitrate solution cooled by the cooling coil to enter a PH measuring tank through a PH measuring control valve, enabling a PH acidometer to accurately and continuously measure PH of the ammonium nitrate solution, enabling produced liquid in the cooler to flow out of a PH measuring tank into a collecting funnel, and then flow into a collecting tank, wherein the treatment of the produced liquid in the collecting tank is the same as that of S3.
Further, the cooling coil in the step S4 is circulated with desalted water cooled by dilute ammonium nitrate solution.
Further, the desalted water inlet temperature of the cooling coil in the step S4 is not higher than 20 ℃.
Further, the temperature of the dilute ammonium nitrate solution in the cooler in the step S4 is not higher than 60 ℃.
Compared with the prior art, the invention has the following advantages:
the invention solves the problems of stable and accurate PH on line detection in the continuous production and storage process of high-concentration and high Wen Xiaosuan ammonium solution, eliminates the potential safety hazard caused by unstable PH control in the whole production process of ammonium nitrate solution, and has extremely strong safety demonstration significance in the ammonium nitrate production industry.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.
FIG. 1 is a flow chart of a method and apparatus for on-line detection of pH of a high concentration, high Wen Xiaosuan ammonium solution in accordance with one embodiment of the present invention.
In the figure: 1. an ammonium nitrate solution reactor, 101, a high-pressure storage tank, 102, an atmospheric storage tank, 2, a sampling pipe control valve, 3, a dilute ammonium nitrate solution sample preparation device, 4, a dilute ammonium nitrate solution flowmeter, 5, a check valve, 6, a desalted water flowmeter, 7, a desalted water regulating valve, 8, a production control valve, 9, a cooling coil, 10, a cooler, 11, a PH measurement control valve, 12, a PH measurement tank, 13, a PH acidimeter, 14, a remote thermometer, 15, a collecting funnel, 16, a collecting tank, 17, a collecting tank pump, 18, a cooling water inlet regulating valve, 19, a cooling water return regulating valve and 20, a heat insulating layer.
Detailed Description
The present invention will be described in detail below with reference to the embodiments shown in the drawings. The embodiments are not intended to limit the invention, but structural, methodological or functional modifications from the embodiments are within the scope of the invention.
The invention discloses equipment for detecting the PH of high-concentration and high-Wen Xiaosuan ammonium solution on line, which is shown by referring to FIG. 1 and comprises a plurality of storage tanks, a dilute ammonium nitrate solution sample preparation device 3 and a collecting funnel 15.
Wherein, all be connected with the sampling pipeline on the storage jar, install sampling pipe control valve 2 on the sampling pipe, sampling pipe control valve 2 is used for controlling the quantity of gathering and the recovery of ammonium nitrate solution in the storage jar.
In addition, the ammonium nitrate solution in the atmospheric tank 102 was returned to the atmospheric tank 102 by sampling the solution in the collection tank 16 and adding the solution back to the liquid outlet end of the collection tank 16.
Preferably, the storage tanks include an ammonium nitrate solution reactor 1, a high pressure storage tank 101, and an atmospheric storage tank 102.
Specifically, a collecting tank 16 is installed on a sampling pipeline of the normal pressure storage tank 102, a liquid outlet end of the collecting tank 16 is connected with a return pipe, and a plurality of sampling pipelines are provided with heat preservation layers 20.
Referring to fig. 1, a diluted ammonium nitrate solution sample preparation device 3 is connected to a sampling line, and the diluted ammonium nitrate solution sample preparation device 3 is used for mixing an ammonium nitrate solution and desalted water.
Preferably, at least two baffles are arranged in the dilute ammonium nitrate solution sample preparation device 3, so that the integral mixing effect is ensured.
Wherein, the diluted ammonium nitrate solution sample preparation device 3 is connected with a diluent inlet pipeline and a diluent outlet pipeline, and a diluted ammonium nitrate solution flowmeter 4 is arranged on the diluent outlet pipeline and is used for metering the diluted ammonium nitrate solution extracted by the diluted ammonium nitrate solution sample preparation device 3.
In addition, the liquid outlet end of the dilute ammonium nitrate solution flowmeter 4 is provided with a branch pipe I and a branch pipe II, and the branch pipe I and the branch pipe II are respectively provided with a production control valve 8.
Specifically, a cooler 10 is connected to the first branch pipe, a cooling coil 9 is arranged in the cooler 10, and the cooling coil 9 is matched with the cooler 10 to cool the dilute ammonium nitrate solution.
In addition, the cooler 10 is connected with a PH metering pipeline for online continuous accurate detection of the PH of the high-concentration and high-Wen Xiaosuan ammonium solution, so that the safety of continuous production of the ammonium nitrate solution is ensured.
Referring to fig. 1, a desalted water regulating valve 7, a desalted water flowmeter 6 and a non-return valve 5 are installed in this order from the liquid inlet direction in the diluent inlet line for controlling the metered desalted water addition amount.
Wherein, the PH metering pipeline is provided with a PH measurement control valve 11 and a PH measurement tank 12, the PH measurement tank 12 is internally provided with a PH acidity meter 13, and the PH acidity meter 13 is used for accurately and continuously measuring the PH of the ammonium nitrate solution.
In addition, the cooler 10 is also provided with a remote thermometer 14, the liquid inlet end of the cooling coil 9 is connected with a cooling water inlet regulating valve 18, the liquid outlet end of the cooling coil 9 is provided with a branch pipe III and a branch pipe IV, the branch pipe III is connected with a diluent inlet pipeline, the branch pipe IV is provided with a cooling water return regulating valve 19 and a desalination water tank, desalted water in the cooling coil 9 is led into the desalination water regulating valve 7 of the dilute ammonium nitrate solution sample preparation device 3 through the branch pipe III, and desalted water in part of the cooling coil 9 flows back to the desalination water tank through the branch pipe IV and the cooling water return regulating valve 19.
Specifically, the collecting funnel 15 is connected with the branch pipe II and the PH metering pipeline respectively, the liquid outlet end of the collecting funnel 15 is connected with the collecting tank 16, the collecting tank pump 17 is arranged on the collecting tank 16, the liquid outlet end of the collecting tank pump 17 is connected with the ammonium nitrate solution production system, and the dilute ammonium nitrate solution in the collecting tank 16 is conveyed to the ammonium nitrate solution production system through the collecting tank pump 17 for subsequent production.
A method for on-line detection of PH of a high concentration, high Wen Xiaosuan ammonium solution comprising the steps of:
s1, fully mixing ammonium nitrate solution sampling in an ammonium nitrate solution reactor 1, a high-pressure storage tank 101 or a normal-pressure storage tank 102 with desalted water metered by a desalted water regulating valve 7, a desalted water flowmeter 6 and a check valve 5 in a dilute ammonium nitrate solution sample preparation device 3 to obtain dilute ammonium nitrate solution;
s2, after the diluted ammonium nitrate solution is measured by the diluted ammonium nitrate solution flowmeter 4, sorting and discharging, namely normally extracting the diluted ammonium nitrate solution from the first branch pipe, and extracting the ammonium nitrate solution from the second branch pipe;
s3, the dilute ammonium nitrate solution extracted by the branch pipe II flows into the collecting funnel 15, flows into the collecting tank 16 through the collecting funnel 15, is then regularly recycled to the ammonium nitrate solution production system through the collecting tank pump 17, and the concentration of the dilute ammonium nitrate solution is kept to be about 10% by controlling the ratio of the addition amount of desalted water to the extraction amount of the dilute ammonium nitrate solution;
s4, after the initial liquid extraction of the dilute ammonium nitrate solution in the dilute ammonium nitrate solution sample preparation device 3 is carried out for 5 minutes, a first extraction control valve 8 on a branch pipe is opened, a second extraction control valve 8 on the branch pipe is closed, the dilute ammonium nitrate solution enters a cooler 10 through the first branch pipe, the dilute ammonium nitrate solution cooled by a cooling coil 9 enters a PH measuring tank 12 through a PH measuring control valve 11, a PH acidimeter 13 is used for accurately and continuously measuring the PH of the ammonium nitrate solution, the extracted liquid in the cooler 10 flows out of the PH measuring tank 12 into a collecting funnel 15 and then flows into a collecting tank 16, and the treatment of the extracted liquid in the collecting tank 16 is the same as that of S3.
Wherein, the cooling coil 9 in S4 is circulated with desalted water cooled by dilute ammonium nitrate solution.
In addition, the desalted water inlet temperature of the cooling coil 9 in S4 is not more than 20 ℃.
Specifically, the temperature of the dilute ammonium nitrate solution in the cooler 10 in S4 is not more than 60 ℃.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment contains only one independent technical solution, and that such description is provided for clarity only, and that the technical solutions of the embodiments may be appropriately combined to form other embodiments that will be understood by those skilled in the art.
Claims (5)
1. An apparatus for on-line detection of PH of a high concentration, high Wen Xiaosuan ammonium solution, comprising:
the storage tanks are connected with sampling pipelines, and sampling pipe control valves (2) are arranged on the sampling pipes;
the diluted ammonium nitrate solution sample preparation device (3) is connected with the sampling pipeline, the diluted ammonium nitrate solution sample preparation device (3) is connected with a diluted solution inlet pipeline and a diluted solution outlet pipeline, the diluted solution outlet pipeline is provided with a diluted ammonium nitrate solution flowmeter (4), the liquid outlet end of the diluted ammonium nitrate solution flowmeter (4) is provided with a branch pipe I and a branch pipe II, the branch pipe I and the branch pipe II are both provided with a production control valve (8), the branch pipe I is connected with a cooler (10), a cooling coil (9) is arranged in the cooler (10), and the cooler (10) is connected with a PH metering pipeline;
the collecting hopper (15) is respectively connected with the branch pipe II and the PH metering pipeline, a liquid outlet end of the collecting hopper (15) is connected with a collecting tank (16), a collecting tank pump (17) is arranged on the collecting tank (16), and a liquid outlet end of the collecting tank pump (17) is connected with an ammonium nitrate solution production system; the storage tank comprises an ammonium nitrate solution reactor (1), a high-pressure storage tank (101) and a normal-pressure storage tank (102), and a plurality of sampling pipelines are provided with heat preservation layers (20); at least two clapboards are arranged in the dilute ammonium nitrate solution sample preparation device (3); a desalted water regulating valve (7), a desalted water flowmeter (6) and a check valve (5) are sequentially arranged on the diluent inlet pipeline from the liquid inlet direction; a PH measurement control valve (11) and a PH measurement tank (12) are arranged on the PH measurement pipeline, and a PH acidity meter (13) is arranged in the PH measurement tank (12); the remote-transmission thermometer is characterized in that the remote-transmission thermometer (14) is further arranged on the cooler (10), a cooling water inlet regulating valve (18) is connected to the liquid inlet end of the cooling coil pipe (9), a branch pipe III and a branch pipe IV are arranged at the liquid outlet end of the cooling coil pipe (9), the branch pipe III is connected with the diluent inlet pipeline, and a cooling water return regulating valve (19) and a desalination water tank are arranged on the branch pipe IV.
2. A method for on-line detection of the PH of a high-strength, high Wen Xiaosuan ammonium solution, which method is based on the apparatus for on-line detection of the PH of a high-strength, high Wen Xiaosuan ammonium solution as described in claim 1, comprising the steps of:
s1, fully mixing ammonium nitrate solution sampling in an ammonium nitrate solution reactor (1), a high-pressure storage tank (101) or a normal-pressure storage tank (102) with desalted water metered by a desalted water regulating valve (7), a desalted water flowmeter (6) and a check valve (5) in a dilute ammonium nitrate solution sample preparation device (3) to obtain dilute ammonium nitrate solution;
s2, metering the dilute ammonium nitrate solution through a dilute ammonium nitrate solution flowmeter (4), and discharging the diluted ammonium nitrate solution in a classified manner, namely normally extracting the diluted ammonium nitrate solution from a branch pipe I, and extracting the ammonium nitrate solution from a branch pipe II after initial dilution;
s3, the dilute ammonium nitrate solution extracted by the branch pipe II flows into a collecting funnel (15), flows into a collecting tank (16) through the collecting funnel (15), is recycled to an ammonium nitrate solution production system at regular time through a collecting tank pump (17), and the concentration of the diluted ammonium nitrate solution is kept at 10% by controlling the ratio of the addition amount of desalted water to the extraction amount of the dilute ammonium nitrate solution;
s4, after initial liquid collection of the dilute ammonium nitrate solution in the dilute ammonium nitrate solution sample preparation device (3) is carried out for 5 minutes, a first-branch-pipe liquid collection control valve (8) is opened, a second-branch-pipe liquid collection control valve (8) is closed, the dilute ammonium nitrate solution enters the cooler (10) through the first branch pipe, the dilute ammonium nitrate solution cooled by the cooling coil (9) enters the PH measuring tank (12) through the PH measuring control valve (11), the PH acidimeter (13) is used for accurately and continuously measuring the PH of the ammonium nitrate solution, liquid collected in the cooler (10) flows out of the PH measuring tank (12) into the collecting funnel (15) and then flows into the collecting tank (16), and the treatment of the liquid collected in the collecting tank (16) is the same as that of S3.
3. The method for on-line detection of the PH of a high concentration, high Wen Xiaosuan ammonium solution according to claim 2, wherein said cooling coil (9) in S4 is circulated with desalted water cooled by a dilute ammonium nitrate solution.
4. A method for on-line detection of high concentration, high Wen Xiaosuan ammonium solutions PH as claimed in claim 3, characterized in that the desalted water inlet temperature of the cooling coil (9) in S4 is not more than 20 ℃.
5. The method for on-line detection of high concentration, high Wen Xiaosuan ammonium solution pH as claimed in claim 4, wherein the temperature of the dilute ammonium nitrate solution in said cooler (10) in S4 is not more than 60 ℃.
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