H2S precipitation test device capable of detecting pH-electrode potential on line

Abstract

The utility model discloses an H2S precipitation test device capable of detecting pH-electrode potential on line. The H2S precipitation test device comprises a sulfuric acid dropwise adding system; a sulfuric acid adding port of the H2S gas preparation system is connected with the sulfuric acid dropwise adding system; a gas input port of the H2S precipitation system is connected with a gas output port of the H2S gas preparation system; the residual H2S absorption system is connected with a tail gas outlet of the H2S precipitation system; the device further comprises a pH-electrode potential detection system. The pH-electrode potential detection system comprises a second peristaltic pump, and the inlet end of the second peristaltic pump is connected with a guide pipe arranged in the H2S precipitation system; a guide pipe in the third conical flask is connected with the outlet end of the second peristaltic pump; and the detection end of the pH-electrode potentiometer is arranged in the third conical flask.

Description

TECHNICAL FIELD

[0001] The utility model relates to metallurgical industry H2S precipitation's test device technical field, especially in kind of H2S precipitation test device of on -line detection pH -electrode potential. BACKGROUND

[0002] The principle of H2S precipitation is that H2S reacts with metal ions in the solution to form a sulfide precipitate with a low solubility product. Because of the difference in solubility product of metal sulfides (the solubility product of some sulfides is shown in Table 1 below), the smaller the solubility product, the easier it is to combine with sulfur and produce the corresponding sulfide. Under different pH-electrode potential process control conditions, step-by-step precipitation of metal sulfides can be achieved.

[0003] .

[0004] However, the current experimental device does not have real-time monitoring of pH-electrode potential, so the experimental process is inefficient. UTILITY MODEL CONTENT

[0005] To solve the above technical problems, the utility model provides a kind of H2S precipitation test device of on -line detection pH -electrode potential.

[0006] To achieve the above purpose, the technical scheme of the utility model is as follows:

[0007] A kind of H2S precipitation test device of on -line detection pH -electrode potential, comprising:

[0008] Sulfuric acid drop system;

[0009] H2S gas preparation system, and its sulfuric acid inlet is connected with sulfuric acid drop system;

[0010] H2S precipitation system, its gas input port is connected with the gas output port of H2S gas preparation system;

[0011] Residual H2S absorption system, and the tail gas outlet of H2S precipitation system is connected;

[0012] Further comprising a pH-electrode potential detection system;

[0013] The pH-electrode potential detection system comprises:

[0014] Second peristaltic pump, its inlet end is connected with the conduit arranged in H2S precipitation system;

[0015] Third conical flask, the conduit in its interior is connected with the outlet end of second peristaltic pump;

[0016] pH-electrode potential meter, its detection end is arranged in third conical flask.

[0017] The sulfuric acid dropping system comprises:

[0018] The first peristaltic pump has an inlet end connected to the sulfuric acid solution storage container through a conduit and an outlet end connected to a sulfuric acid adding port of the H2S gas preparation system through a conduit.

[0019] The H2S gas preparation system comprises:

[0020] A constant-temperature heating magnetic stirrer;

[0021] The first conical flask is arranged in the constant-temperature heating magnetic stirrer and has an inlet end connected to the sulfuric acid dropping system and an outlet end connected to a gas input port of the H2S precipitation system through a conduit.

[0022] The H2S precipitation system comprises:

[0023] A double-layer glass reaction kettle has an air inlet pipe in the inside connected to a gas output port of the H2S gas preparation system and a tail gas outlet on the top connected to a residual H2S absorption system;

[0024] A gas distributor is arranged on the outlet end of the air inlet pipe.

[0025] The residual H2S absorption system comprises:

[0026] Two second conical flasks in communication with each other have an air inlet end of a first second conical flask connected to a tail gas outlet of the H2S precipitation system;

[0027] A circulating water type multi-purpose vacuum pump is connected to a second second conical flask.

[0028] The beneficial effects of the utility model are that the utility model can realize real-time monitoring of the pH-electrode potential in the H2S precipitation test process, realizes step-by-step precipitation of the solution by controlling the pH-electrode potential, and guarantees safe and efficient operation of the overall test device. The whole test device is placed in a negative pressure closed laboratory, and the on-site safety is guaranteed to the maximum extent from the process point of view. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is the structure principle drawing of the utility model. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the utility model more clear and explicit, the utility model is further described in detail in combination with specific implementation manners. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of the known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0031] AsFigure 1 The H2S precipitation test device capable of detecting the pH-electrode potential on line comprises a sulfuric acid dropping system, an H2S gas preparation system, an H2S precipitation system, a residual H2S absorption system and a pH-electrode potential detection system.

[0032] In use, the H2S precipitation test device capable of detecting the pH-electrode potential on line comprises a sulfuric acid dropping system, an H2S gas preparation system, an H2S precipitation system, a residual H2S absorption system and a pH-electrode potential detection system.

[0033] The sulfuric acid dropping system is composed of a sulfuric acid solution storage container 1 and a first peristaltic pump 2.

[0034] The H2S gas preparation system is composed of a first conical flask 3 and a constant-temperature heating magnetic stirrer 4.

[0035] The H2S precipitation system is composed of a double-layer glass reactor 5 and a gas distributor 6. The double-layer glass reactor 5 is a closed stirring reactor which can be heated, has a volume of 5 L, an opening 5 on the cover, and a stirring speed of 0-600 rpm; the gas distributor 6 is a gas distribution device for the H2S gas into the glass reactor, and is made of a glass straight pipe and fine sand bubble stone.

[0036] The residual H2S absorption system is composed of a circulating water type multi-purpose vacuum pump 7 and a second conical flask 8, and is a two-stage alkali absorption system, which mainly absorbs the unreacted H2S gas; the circulating water type multi-purpose vacuum pump 7 provides a vacuum degree for the two-stage alkali absorption, has a pumping capacity of 10 L / min, and a limit vacuum of 0.098 MPa.

[0037] The second conical flask 8 is filled with alkali solution, and absorbs the H2S gas.

[0038] The pH-electrode potential detection system is composed of a second peristaltic pump 9, a third conical flask 10 and a pH-electrode potential meter 11, and mainly detects the pH and electrode potential of the reaction solution in the third conical flask 10 by the second peristaltic pump 9. The second peristaltic pump 9 has a flow range of 0.00011-750 ml / min, and a working speed of 0.1-150 r / min; the pH-electrode potential meter 11 is inserted into the third conical flask 10 to detect the solution in the flask, and has a pH measurement range of -2.00-16.00 pH, a measurement accuracy of ±0.01 pH, an electrode potential measurement range of -1999-1999 mv, a measurement accuracy of ±1 mv, a temperature measurement range of 0-100℃, and a measurement accuracy of ±1℃.

[0039] During operation, the prepared Na2S solution is poured into the first conical flask 3 in the H2S gas preparation system, the prepared sulfuric acid solution is put into the sulfuric acid storage container 1 in the sulfuric acid dropping system, the first peristaltic pump 2 is used to drop the H2S gas into the first conical flask 3 in the H2S gas preparation system, the H2S gas prepared in the first conical flask 3 is introduced into the H2S precipitation system by pressure, the residual H2S in the reaction is introduced into the H2S two-stage alkali absorption system, the pH and electrode potential of the solution in the third conical flask 10 are detected by the pH-electrode potential meter 11, and the step-by-step precipitation of the solution is realized by controlling the pH and electrode potential.

[0040] It should be understood that the above specific embodiments of the present application are only used for illustrative or explanatory purposes of the principles of the present application, and do not constitute a limitation on the present application. Therefore, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present application shall be included in the protection scope of the present application. In addition, the appended claims of the present application are intended to cover all changes and modifications falling within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.

Claims

1. A H2S deposition test device capable of detecting the potential of a pH-electrode on-line, characterized in that, The application relates to a sulfuric acid dropping system, an H2S gas preparation system, an H2S precipitation system and a residual H2S absorption system. The sulfuric acid dropping system comprises: A first peristaltic pump (2) is connected with a sulfuric acid solution storage container (1) through a pipe at an inlet end and connected with an H2S gas preparation system through a pipe at an outlet end. The H2S gas preparation system comprises: A constant-temperature heating magnetic stirrer (4) and a first conical flask (3) are arranged on the constant-temperature heating magnetic stirrer (4), the first conical flask (3) is connected with the sulfuric acid dropping system at an inlet end and connected with the H2S precipitation system through a pipe at an outlet end. The H2S precipitation system comprises: A double-layer glass reaction kettle (5) is connected with the H2S gas preparation system through a gas inlet pipe at an inlet end and connected with the residual H2S absorption system through a tail gas outlet at a top end. The residual H2S absorption system comprises: Two second conical flasks (8) are connected with each other, a first second conical flask (8) is connected with the H2S precipitation system through a gas inlet pipe at an inlet end, and a circulating water type multi-purpose vacuum pump (7) is connected with a second second conical flask (8). ​ 2. The H2S deposition test device capable of detecting the potential of pH-electrode on line according to claim 1, characterized in that, ​ ​ 3. The H2S deposition test device capable of detecting the potential of pH-electrode on line according to claim 1, characterized in that, ​ ​ ​ 4. The H2S deposition test device capable of detecting the potential of pH-electrode on line according to claim 1, characterized in that, ​ ​ ​ 5. The H2S deposition test device capable of detecting the potential of pH-electrode on-line according to claim 1, characterized in that, ​ ​ ​

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