Waste acid sampling and analyzing device

Abstract

The utility model discloses a waste acid sampling and analyzing device which comprises a waste acid sampler, the waste acid sampler is installed in a sampling channel and communicated with a reactor, a filter, a second metering pump and a second electromagnetic valve are sequentially arranged between the waste acid sampler and the reactor, and a backwashing device is communicated between the second metering pump and the second electromagnetic valve. The reactor is provided with a monitoring analysis device, the upper part of the reactor is provided with a titration agent box and a flushing device, and the bottom of the reactor is provided with a drainage outlet. The device is favorable for improving the treatment stability, keeping the production consistency, reducing the labor intensity of operators, reducing the hysteresis quality and difference of manual control of the operators and reducing the cost, and meanwhile, the device is provided with a backwashing / flushing device in each link, so that residual liquid in the reactor is prevented from being backflushed into a preposed transmission device, and the production efficiency is improved. And the accuracy of titration reaction is ensured by automatic cleaning.

Description

Technical Field

[0001] The utility model relates to the technical field of sampling and analysis, in particular to a device for sampling and analyzing waste acid. Background Art

[0002] The non-ferrous smelting sulfuric acid workshop discharges a large amount of waste acid during operation. In addition to 1-10% sulfuric acid, it also contains heavy metals such as copper, zinc, lead, iron, and elements such as arsenic and fluorine. Arsenic and heavy metals will cause serious harm to the ecological environment. Therefore, the waste acid needs to be treated to remove harmful substances. The treated sewage is mixed with other wastewater in the plant area for further treatment to meet the discharge standards or reuse. The waste acid treatment process commonly uses the sulfidation method + limestone neutralization method. The main process of the sulfidation method is that the waste acid stock liquid is pumped to the hydrogen sulfide absorption tower with the stock liquid, and enters the sulfidation reaction tank after absorbing the H2S in the exhaust gas. In the sulfidation reaction tank, the heavy metals in the waste acid stock liquid react with the Na2S solution to mainly generate CuS, As2S3 and other precipitates. The mixed liquid is retained in the thickener for solid-liquid separation, and the supernatant is discharged to the next treatment section. The bottom sludge is pumped to the filter press for sludge dehydration to produce arsenic slag, and the excess H2S is removed in the harm removal tower using NaOH solution. Traditional manual inspection is time-consuming and labor-intensive, with poor results. The use of high-precision automated instrumentation for inspection has high purchase and maintenance costs, and its service life does not meet expectations. Therefore, in order to keep the process parameters of the production line stable under various complex working conditions, stabilize thermal parameters while reducing energy consumption, avoid the lag and variability of operator control, and reduce costs, it is necessary to set up an automatic sampling and analysis device at the reaction endpoint detection point. Utility Model Content

[0003] The purpose of the utility model is to overcome the above-mentioned defects or problems existing in the background technology and provide a device for sampling and analyzing waste acid.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A device for sampling and analyzing waste acid comprises a waste acid sampler, which is installed in a sampling channel and connected to a reactor. A filter, a second metering pump and a second solenoid valve are arranged in sequence between the waste acid sampler and the reactor. A backwashing device is connected between the second metering pump and the second solenoid valve. The reactor is provided with a monitoring and analyzing device. A titration agent box and a flushing device are arranged on the upper part of the reactor. A drainage outlet is arranged at the bottom of the reactor.

[0006] In certain embodiments of the utility model, the filter is arranged in the sample placing device, and the sample placing device is connected to the sampling channel through a flushing water pipe.

[0007] In certain embodiments of the utility model, a first solenoid valve is respectively provided on the flushing water pipe and between the waste acid sampler and the reactor.

[0008] In certain embodiments of the utility model, the reactor is a conical reaction container, the filter is a filter screen, and the waste acid sampler is configured as a first metering pump.

[0009] In certain embodiments of the present invention, a cleaning solution tank and a clean water tank are disposed at the other end of the flushing device.

[0010] In certain embodiments of the utility model, a fourth solenoid valve is provided between the cleaning solution tank, the clean water tank and the flushing device, and a third solenoid valve is installed at the drainage outlet.

[0011] In certain embodiments of the utility model, the monitoring and analysis device includes a visual analysis monitoring probe arranged facing the reactor and a background control device, and the visual analysis monitoring probe is communicatively connected with the background control device.

[0012] In certain embodiments of the present invention, one end of the sampling channel is connected to the outlet of the vulcanization reaction tank, and the other end of the sampling channel and the drainage outlet are respectively connected to the vulcanization thickener.

[0013] In certain embodiments of the present invention, the sampling channel is configured as a sampling chute.

[0014] From the above description of the utility model, it can be seen that compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. By setting up an automatic sampling and analysis device at the endpoint detection point of the waste acid treatment reaction, it is beneficial to maintain the stability of various process parameters, improve treatment stability, maintain production consistency, reduce the labor intensity of operators, reduce the lag and difference of operator manual control, and reduce costs.

[0016] 2. The device is equipped with backwashing / flushing devices in each link to prevent the residual liquid in the reactor from being backwashed into the front transmission device. Automatic cleaning ensures the accuracy of the titration reaction, and transmits the titration results to the background control equipment in real time through communication connection. The background records the data of the waste acid sampling and analysis titration reaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 Schematic diagram of the utility model:

[0019] Description of main reference numerals:

[0020] 1. Waste acid sampler, 10. Sulfide reaction tank, 11. Sulfide thickener, 2. Sampling channel, 3. Reactor, 30. Titration agent box, 31. Drain outlet, 32. Third solenoid valve, 33. Third metering pump, 4. Filter, 40. Sampling device, 41. Flushing water pipe, 43. First solenoid valve, 5. Second metering pump, 6. Second solenoid valve, 7. Backwashing device, 8. Visual analysis monitoring probe, 9. Flushing device, 90. Cleaning solution tank, 91. Clean water tank, 92. Fourth solenoid valve. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are preferred embodiments of the utility model and should not be regarded as excluding other embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0022] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" etc. is to distinguish different objects rather than to describe a specific order.

[0023] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise explicitly defined, directional words, such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise", etc., indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the specific protection scope of the invention.

[0024] In the claims, specification and the above drawings of the utility model, unless otherwise clearly defined, if the term "fixed connection" or "fixed connection" is used, it should be understood in a broad sense, that is, any connection method without a displacement relationship and relative rotation relationship between the two, that is to say, including non-detachable fixed connection, detachable fixed connection, integrated connection and fixed connection through other devices or elements.

[0025] In the claims, specification and drawings of the present utility model, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0026] See also Figure 1 :

[0027] A device for sampling and analyzing waste acid comprises a waste acid sampler 1, which is installed in a sampling channel 2. As an embodiment, the sampling channel 2 is configured as a sampling chute, so that the waste acid liquid flows from one end of the sampling chute to the other end in a gravity flow manner. Furthermore, the level of the waste acid liquid flowing into one end of the sampling chute is higher than the level of the other end of the sampling chute.

[0028] The waste acid sampler 1 is connected to the reactor 3, and a filter 4, a second metering pump 5, and a second solenoid valve 6 are sequentially arranged between the waste acid sampler 1 and the reactor 3. A backwashing device 7 is connected between the second metering pump 5 and the second solenoid valve 6. As an embodiment, the filter 4 is arranged in the sampler 40, and the sampler 40 is connected to the sampling channel 2 through a flushing water pipe 41. Further, the flushing water pipe 41 and the connecting pipe between the waste acid sampler 1 and the reactor 3 are respectively provided with a first solenoid valve 43. When in use, the second solenoid valve 6 and the first solenoid valve arranged between the waste acid sampler 1 and the reactor 3 are closed, the first solenoid valve on the flushing water pipe 41 is opened, and the backwashing device 7 is opened to flush the filter 4, the second metering pump 5 and the connecting pipe, and the flushing water enters the sampling channel 2 from the flushing water pipe 41. In some other embodiments, the bottom of the sampler 40 is also connected to a flushing drain port, so that the flushing water can also flow out from the flushing drain port.

[0029] The reactor 3 is provided with a monitoring and analysis device, a titration agent box 30 and a flushing device 9 are provided on the upper part of the reactor 3, the other end of the flushing device 9 is connected to a cleaning solution box 90 and a clean water tank 91, and a drainage outlet 31 is provided at the bottom of the reactor 3; in this embodiment, the cleaning solution box 90 is filled with 5% dilute sulfuric acid, and the 5% dilute sulfuric acid is mixed with the clean water in the clean water tank 91 and the reactor 3 is flushed under the control of the flushing device 9, and the flushed water is discharged through the drainage outlet 31.

[0030] In some embodiments, the reactor 3 is a conical reaction container, the filter 4 is a filter screen, and the waste acid sampler 1 is set as a first metering pump. Further, the reactor 3 can be made of acrylic transparent material; in some embodiments, the reactor 3 is provided with an electric stirring rod, which extends into the reactor 3, and stirring is conducive to increasing the reaction speed of the liquid in the reactor.

[0031] In some embodiments, a fourth solenoid valve 92 is disposed between the cleaning solution tank 90 , the clean water tank 91 and the flushing device 9 , and a third solenoid valve 32 is installed at the drainage outlet 31 .

[0032] In some embodiments, the titration agent tank 30 adds the titration agent to the reactor 3 via the third metering pump 33 .

[0033] In some embodiments, the monitoring and analysis device includes a visual analysis monitoring probe 8 and a background control device arranged directly opposite the reactor 3. The visual analysis monitoring probe 8 is connected to the background control device for communication, and the titration result is transmitted to the background control device in real time for communication, and the background records the data of the spent acid sampling and analysis titration reaction. In some other embodiments, the monitoring and analysis device is configured as a contact sensor probe, and the contact sensor probe transmits the detected titration analysis signal to the background control device.

[0034] Furthermore, the first solenoid valve 43, the second solenoid valve 6, the third solenoid valve 32, the fourth solenoid valve 92, the waste acid sampler 1, the second metering pump 5, and the third metering pump 33 are respectively connected to the on-site DCS, and the on-site DCS is communicatively connected to the background control device, and the background control device is set as an APC server. The third metering pump 33 adopts an electric pump body capable of quantitative sampling. Specifically, the third metering pump 33 can be set as an electromagnetic diaphragm acid and alkali corrosion resistant dosing metering pump.

[0035] As an embodiment, one end of the sampling channel 2 is connected to the outlet of the vulcanization reaction tank 10, and the other end of the sampling channel 2 and the drainage outlet 31 are respectively connected to the vulcanization thickener 11. In some embodiments, a sensor for detecting the liquid level is installed in the sampling channel 2 to prevent the excessive amount of treated waste acid liquid in the sampling channel 2 from overflowing.

[0036] The description of the above specification and embodiments is used to explain the protection scope of the utility model, but does not constitute a limitation on the protection scope of the utility model. Through the enlightenment of the utility model or the above embodiments, ordinary technicians in this field can obtain modifications, equivalent replacements or other improvements to the embodiments of the utility model or part of the technical features thereof through logical analysis, reasoning or limited experiments, which should be included in the protection scope of the utility model.

Claims

1. A device for sampling and analyzing waste acid, characterized in that: The method comprises a waste acid sampler, which is installed in a sampling channel and connected to a reactor. A filter, a second metering pump and a second solenoid valve are arranged in sequence between the waste acid sampler and the reactor. A backwashing device is connected between the second metering pump and the second solenoid valve. The reactor is provided with a monitoring and analysis device. A titration agent box and a flushing device are arranged on the upper part of the reactor. A drainage outlet is arranged at the bottom of the reactor.

2. The device for sampling and analyzing waste acid according to claim 1, characterized in that: The filter is arranged in the sample placing device, and the sample placing device is connected to the sampling channel through a flushing water pipe.

3. The device for sampling and analyzing waste acid according to claim 2, characterized in that: A first solenoid valve is respectively arranged on the flushing water pipe and between the waste acid sampler and the reactor.

4. The device for sampling and analyzing waste acid according to claim 1, characterized in that: The reactor is a conical reaction container, the filter is a filter screen, and the spent acid sampler is a first metering pump.

5. The device for sampling and analyzing waste acid according to claim 1, characterized in that: The other end of the flushing device is provided with a cleaning solution tank and a clean water tank.

6. The device for sampling and analyzing waste acid according to claim 5, characterized in that: A fourth solenoid valve is arranged between the cleaning solution tank, the clean water tank and the flushing device, and a third solenoid valve is installed at the drainage outlet.

7. The device for sampling and analyzing waste acid according to claim 1, characterized in that: The monitoring and analysis device comprises a visual analysis monitoring probe arranged facing the reactor and a background control device, and the visual analysis monitoring probe is communicatively connected with the background control device.

8. A device for sampling and analyzing waste acid according to any one of claims 1 to 7, characterized in that: One end of the sampling channel is connected to the outlet of the vulcanization reaction tank, and the other end of the sampling channel and the drainage outlet are respectively connected to the vulcanization thickener.

9. The device for sampling and analyzing waste acid according to claim 8, characterized in that: The sampling channel is configured as a sampling chute.

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