CN217939746U

CN217939746U - Electrode precipitation overflow device of PH meter of sintering desulfurization slurry discharge pipe

Info

Publication number: CN217939746U
Application number: CN202222046883.2U
Authority: CN
Inventors: 韦新鹏; 杨卫彪; 邵永成
Original assignee: Gansu Jiu Steel Group Hongxing Iron and Steel Co Ltd
Current assignee: Gansu Jiu Steel Group Hongxing Iron and Steel Co Ltd
Priority date: 2022-08-04
Filing date: 2022-08-04
Publication date: 2022-12-02
Anticipated expiration: 2032-08-04

Abstract

The utility model belongs to the technical field of sintering desulfurization thick liquid discharge pipe pH meter, a sintering desulfurization thick liquid discharge pipe pH meter electrode sedimentation overflow arrangement is disclosed, in order to solve the problem that exists among the prior art sintering desulfurization thick liquid discharge pipe pH meter, the device includes the sedimentation overflow jar, the top of sedimentation overflow jar is equipped with the pH electrode, the thick liquid export has been seted up on the upper portion of sedimentation overflow jar, the thick liquid import has been seted up to the lower part of sedimentation overflow jar, the thick liquid import is connected with the bypass pipe, the bypass pipe is connected with gypsum discharge pump pipeline, the bottom of sedimentation overflow jar is connected with thick liquid evacuation mouth, thick liquid evacuation mouth is connected with the trench, make the thick liquid that contains solid content in the desulfurizing tower send to the great jar body lower part of sectional area through the pipeline of less sectional area, the velocity of flow of liquid has been greatly reduced, most solid in the jar internal thick liquid is contacted with the pH electrode after being separated, the erosion and abrasion of high velocity of flow liquid to the probe has been solved effectively; it can also prevent the fouling of the high solid content slurry on the probe.

Description

Electrode precipitation overflow device of PH meter of sintering desulfurization slurry discharge pipe

Technical Field

The utility model relates to a sintering desulfurization thick liquid discharge pipe pH meter technical field, concretely relates to sintering desulfurization thick liquid discharge pipe pH meter electrode deposits overflow arrangement.

Background

The PH is counted as the "eye" in the sinter desulfurization system and plays a crucial role in operation. The installation parts of the pH meter used in the prior wet desulphurization system are mainly three types, namely a desulphurization tower body, a slurry circulating pump pipeline and a gypsum discharge pump pipeline.

A pH electrode of the system for measuring the pH of gypsum slurry in a sintering desulfurization adsorption tower is installed by adopting a pipeline structure. It has the following disadvantages:

1. the desulfurized gypsum slurry contains chloride ions, has high viscosity and solid content, has high flow rate, seriously scours and wears a PH electrode and is easy to abrade; affecting the PH electrode lifetime.

2. Scaling easily causes the pH value of the slurry to have a linear distortion phenomenon, so that a desulfurization system cannot normally operate.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem existing in the pH meter of the sintering desulfurization slurry discharge pipe in the prior art, and providing an electrode precipitation overflow device of the pH meter of the sintering desulfurization slurry discharge pipe.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a sintering desulfurization thick liquid discharge pipe PH meter electrode deposits overflow arrangement, is equipped with the pH electrode including depositing the overflow tank, the top of depositing the overflow tank, is equipped with the PH secondary meter of measuring on the pH electrode, and the thick liquid export has been seted up on the upper portion of depositing the overflow tank, and the thick liquid import has been seted up to the lower part of depositing the overflow tank, and the thick liquid access connection has the bypass pipe, and the bypass pipe is connected with gypsum discharge pump pipeline, and the bottom of depositing the overflow tank is connected with the thick liquid evacuation mouth, and the thick liquid evacuation mouth is connected with the trench.

Furthermore, the bottom of the sedimentation overflow tank is a conical outlet, the conical outlet is connected with a slurry emptying port, and a drain valve is arranged between the conical outlet and the slurry emptying port.

Furthermore, the slurry inlet is connected with the bypass pipe through a pair of flanges, and the bypass pipe is provided with a bypass valve.

Furthermore, an internal thread mounting sleeve is fixed at the top of the precipitation overflow tank, and the pH electrode is connected with the internal thread mounting sleeve through threads.

Compared with the prior art, the utility model, following beneficial effect has:

the utility model discloses the mounting structure of improved generation PH electrode makes the higher thick liquid of solid content send the great jar body lower part of sectional area through the pipeline that the sectional area is less in the desulfurizing tower, has greatly reduced the velocity of flow of liquid, contacts with the PH electrode after most solid in the thick liquid is separated in the jar body, has solved the erosion and wear of high velocity of flow liquid to the probe on the one hand effectively; on the other hand, the scale formation of the slurry with high solid content on the probe can be prevented.

The utility model discloses compact structure, thinking are ingenious, and the user can install pH electrode sedimentation overflow tank on desulfurizing tower gypsum discharge pump line. When the device is put into operation, the blow-down valve of the sedimentation overflow tank is fully opened, the bypass valve is opened by half, the blow-down valve is slowly closed, and the bypass valve is adjusted. And observing whether the slurry flows out slowly from the slurry outlet, and adjusting the opening degrees of the bypass valve and the blow-down valve to ensure that the slurry in the pH electrode precipitation overflow tank can stay for a proper time.

The utility model discloses a with the screw thread that can install PH electrode inner core with PH electrode inner core and jar body through the screw thread, through the degree of depth that the adjustable pH electrode of adjustment pH electrode sheathed tube inner core stretched into jar body, the dynamics that makes fluid temperature and thick liquid erode the PH electrode all keeps within a suitable within range.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

The reference numerals have the following meanings: a pH electrode; 2. a precipitation overflow tank; 3. a slurry outlet; 4. a trench; 5. emptying the slurry; 6. a slurry inlet; 7. gypsum discharge pump lines; 8. a bypass pipe; 9. a bypass valve; 10. a blowoff valve; a secondary instrument for measuring PH; 12. a conical outlet; 13. and an internal thread mounting sleeve.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

As shown in fig. 1, an electrode precipitation overflow device for a sintering desulfurization slurry discharge pipe PH meter comprises a precipitation overflow tank 2, an internal thread installation sleeve 13 is welded at the top of the precipitation overflow tank 2, a PH electrode 1 is installed on the internal thread installation sleeve 13 in a threaded manner (the inner core of the PH electrode 1 is sleeved on the external thread sleeve), a PH measurement secondary instrument 11 is installed on the PH electrode 1, a slurry outlet 3 is installed on the upper portion of the precipitation overflow tank 2, a slurry inlet 6 is installed on the lower portion of the precipitation overflow tank 2, the slurry inlet 6 is connected with a bypass pipe 8, the slurry inlet 6 is connected with the bypass pipe 8 through a pair flange 14, a bypass valve 9 is installed on the bypass pipe 8, the bypass pipe 8 is connected with a gypsum discharge pump pipeline 7, a delivery pump is connected on the gypsum discharge pump pipeline 7, a conical outlet 12 is arranged at the bottom of the precipitation overflow tank 2, the conical outlet 12 is connected with a slurry emptying port 5, a blowdown valve 10 is installed between the conical outlet 12 and the slurry emptying port 5, and the slurry emptying port 5 is connected with a trench 4.

The bypass valve 9 on the bypass pipe 8 connected with the gypsum discharge pump pipeline 7 is opened, the slurry enters the sedimentation overflow tank 2 from the lower part of the sedimentation overflow tank 2, and the PH electrode is soaked in the slurry, so that the influence of slurry scouring on the PH electrode is effectively reduced due to relatively low flow speed. Through the screw thread degree of depth of rotation adjustment PH electrode sleeve pipe, the degree of depth that adjustable PH electrode 1 stretched into jar body makes the dynamics that fluid temperature and thick liquid erodeed all keep in a suitable within range. The improved installation structure of the PH electrode enables the slurry with higher solid content in the desulfurizing tower to be sent to the lower part of the tank body with larger sectional area through the pipeline with smaller sectional area, thereby greatly reducing the flow rate of the liquid, and on one hand, most of the solid in the slurry in the tank body is contacted with the PH electrode after being separated, thereby effectively solving the scouring and abrasion of the high-flow-rate liquid to the electrode; on the other hand, the scale formation of the slurry with high solid content on the electrode can be prevented.

When the device is put into operation, the blowdown valve 10 of the precipitation overflow tank 2 is fully opened, then the bypass valve 9 is opened by half, then the blowdown valve 10 is slowly closed, the bypass valve 9 is adjusted, whether slurry flows out slowly from the slurry outlet 3 is observed, and through experience and experiments, the opening degrees of the bypass valve 9 and the blowdown valve 10 are adjusted to enable the slurry in the pH electrode precipitation overflow tank 2 to stay for about 4-6 minutes.

In the operation of the desulfurization system, the pH value of the slurry in the desulfurization tower can be maintained in a weakly acidic environment of 5.8-6.5, mainly because a large amount of sulfate and sulfite ions exist in the slurry. Both ions are soluble ions, so that the removal of solids from the slurry has little effect on the pH of the slurry. Due to the existence of sulfate ions and sulfite ions, the slurry forms a buffer solution, and even along with the addition of lime slurry, the pH change range of the slurry in the desulfurization tower in a short time is not too large. The residence time of the slurry in the desulfurizing tower is generally 4-6 minutes, if the residence time is too long, the measured data is seriously lagged, larger deviation is caused, and if the residence time is too short, the slurry cannot achieve the precipitation effect. The mixing is again carried out for at least one cycle, so that the pH measured by the apparatus in a short time is substantially representative of the instantaneous pH of the slurry in the column, with little deviation. According to the characteristics of the desulfurization system, the retention time of the slurry in the tank body of the PH meter is designed to be about 4-6 minutes (realized by adjusting the opening degrees of the bypass valve 9 and the blow-down valve 10), if the retention time is too long, the measured data is seriously lagged to cause larger deviation, and if the retention time of the slurry in the tank body is too short, the slurry cannot achieve the effect of precipitation.

Claims

1. The utility model provides a sintering desulfurization thick liquid discharge pipe PH meter electrode deposits overflow arrangement which characterized by: including settling overflow tank (2), the top of settling overflow tank (2) is equipped with pH electrode (1), pH secondary instrument (11) are measured to the PH that is equipped with on pH electrode (1), thick liquid export (3) have been seted up on the upper portion of settling overflow tank (2), thick liquid import (6) have been seted up to the lower part of settling overflow tank (2), thick liquid import (6) are connected with bypass pipe (8), bypass pipe (8) are connected with gypsum discharge pump pipeline (7), the bottom of settling overflow tank (2) is connected with thick liquid evacuation mouth (5), thick liquid evacuation mouth (5) are connected with trench (4).

2. The PH meter electrode precipitation overflow device for a discharge pipe of sintered desulfurized slurry as set forth in claim 1, wherein: the bottom of the sedimentation overflow tank (2) is a conical outlet (12), the conical outlet (12) is connected with the slurry emptying port (5), and a blow-off valve (10) is arranged between the conical outlet (12) and the slurry emptying port (5).

3. The PH meter electrode precipitation overflow device for a discharge pipe of sintered desulfurization slurry as set forth in claim 2, wherein: the slurry inlet (6) is connected with the bypass pipe (8) through a pair of flanges (14), and the bypass pipe (8) is provided with a bypass valve (9).

4. A PH meter electrode precipitation overflow device for a discharge pipe of flue gas desulfurization slurry as set forth in claim 3, wherein: an internal thread mounting sleeve (13) is fixed at the top of the precipitation overflow tank (2), and the pH electrode (1) is connected with the internal thread mounting sleeve (13) through threads.