CN218823760U

CN218823760U - Automatic density and pH measuring device of wet flue gas desulfurization absorption tower

Info

Publication number: CN218823760U
Application number: CN202222928869.5U
Authority: CN
Inventors: 姚书恒; 周娇; 范洪武; 罗通; 季歆
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-11-02
Filing date: 2022-11-02
Publication date: 2023-04-07
Anticipated expiration: 2032-11-02

Abstract

The utility model discloses an automatic density and pH measuring device of a wet desulphurization absorption tower, which relates to the technical field of wet desulphurization, and comprises a slurry inlet valve, wherein the slurry inlet valve is connected with a slurry inlet pipe welded on the absorption tower, the slurry inlet valve is connected with a glass fiber reinforced plastic inlet pipe through a flange, the other end of the glass fiber reinforced plastic inlet pipe is connected with a conical diffuser pipe through a flange, a pH measuring pool is installed at the top of the conical diffuser pipe, the pH measuring pool is provided with a connected density measuring pool through a side wall, and the inlet of the density measuring pool is provided with a density measuring pool inlet valve and a density measuring pool discharge valve; the utility model provides an among the technical scheme, the measuring cell changes to stainless steel lining rubber material, and the interface changes to flange joint. The inlet of the pH measuring tank is provided with a filter screen, the state of the valve is controlled and monitored by an automatic control system, and the state and the sequential control parameters of the valve are adjusted according to the actual operating conditions. And when the working condition changes rapidly and the density needs to be monitored rapidly and continuously, selecting a rapid and continuous measurement mode.

Description

Automatic density and pH measuring device of wet flue gas desulfurization absorption tower

Technical Field

The utility model relates to a wet flue gas desulfurization technical field, concretely relates to automatic density of wet flue gas desulfurization absorption tower and pH measuring device.

Background

The limestone gypsum wet desulphurization process is the most widely applied and mature sulfur dioxide removal technology in the world at present. Limestone slurry with a certain concentration is used as a desulfurizer, the flue gas is washed in an absorption tower through the desulfurizer, a desulfurization reaction is carried out to remove sulfur dioxide in the flue gas, calcium sulfite generated by the reaction generates gypsum through an oxidation reaction, and the desulfurized flue gas is demisted and then discharged from a chimney. The density and pH of the limestone slurry directly affect the stability and economy of the desulfurization system. The existing differential pressure density measurement mode is generally that the differential pressure density measurement mode is installed on an absorption tower, and the density is obtained through differential pressure measurement and calculation.

The existing pH measuring method has the following defects: (1) Because the solid content of the slurry is relatively large and the flow rate is high, the probe is easy to generate the problems of abrasion and scaling under the long-time scouring, and the service life is greatly influenced. (2) If the abrasion of solid particles to the electrode is reduced only by installing the filter screen, the filter screen is frequently blocked, and the out-of-service maintenance frequency of the equipment is obviously increased. (3) The situation of filter screen blockage can be obviously avoided by increasing the flushing water on the basis of the step (2), but the increase of the flushing water amount increases the consumption of process water and the energy consumption of a pit pump. Moreover, the existing density and pH measuring modes have less automatic intervention, the optimal measuring mode cannot be selected according to the change of working conditions, and the economy is not enough.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the problem among the prior art to provide an automatic density of wet flue gas desulfurization absorption tower and pH measuring device.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the utility model provides an automatic density of wet flue gas desulfurization absorption tower and pH measuring device, includes the thick liquid import valve, the thick liquid import valve links to each other with the grout inlet pipe of welding at the absorption tower, the thick liquid import valve has glass steel import pipe through flange joint, the other end of glass steel import pipe has the toper diffuser pipe through flange joint, the pH measuring cell is installed at the top of toper diffuser pipe, the pH measuring cell is provided with the density measurement pond that is connected through the lateral wall, the density measurement pond import is provided with density measurement pond import valve and density measurement pond discharge valve, the lateral wall of density measurement pond is provided with first diaphragm type differential pressure transmitter interface and second diaphragm type differential pressure transmitter interface, the lateral wall of density measurement pond is provided with density measurement pond overflow pipe, the middle part of pH measuring pond is provided with the filter screen, the lateral wall of pH measuring pond is provided with the pH meter interface, the pH measuring pond is connected with the density measurement pond through the pH meter interface, the lateral wall upside of pH measuring pond is provided with pH measurement pond overflow pipe.

Preferably, the pH measuring cell is provided with an electrode slot for connecting a pH meter.

Preferably, a bottom pipeline of the conical diffuser pipe is provided with a pH measuring pool discharge valve, one end of the pH measuring pool discharge valve is connected with a discharge pipe, and a throttle orifice plate is arranged between the pH measuring pool discharge valve and the conical diffuser pipe.

The utility model provides an automatic density of wet flue gas desulfurization absorption tower and pH measuring device, still includes washes the subassembly, and washes the subassembly including washing water valve and flushing pipe, just the flushing pipe is installed in the one end of washing the water valve.

Preferably, the inlet position of the discharge valve of the density measuring cell is provided with a throttle orifice plate.

Preferably, the density measuring cell inlet valve and the density measuring cell discharge valve are electric valves, electromagnetic valves or pneumatic valves, and the orifice plate is arranged at the inlet position of the density measuring cell discharge valve.

The utility model provides an automatic density of wet flue gas desulfurization absorption tower and pH measuring device, still includes automatic control system, automatic control system is connected with washing water valve, density measurement cell import valve, thick liquid import valve and pH measurement cell discharge valve respectively, just automatic control system is PLC or DCS system.

The utility model has the advantages that:

the utility model discloses a measuring tank changes to stainless steel lining rubber material, and the interface changes to flange joint. The inlet of the pH measuring tank is provided with a filter screen, the state of the valve is controlled and monitored by an automatic control system, and the state and the sequential control parameters of the valve are adjusted according to the actual operating conditions. Continuous measurement mode: when the working condition changes rapidly and the density and the pH need to be monitored continuously, a continuous measurement mode is selected. Fast continuous measurement mode: and when the working condition changes rapidly and the density needs to be monitored rapidly and continuously, selecting a rapid and continuous measurement mode.

The utility model discloses the intermittent type measuring mode who adopts: and when the working condition is relatively stable and the parameter changes slowly, selecting an intermittent measurement mode. And a washing component is newly arranged to regularly wash the filter screen and the pH electrode. The inlet of the discharge valve of the pH measuring cell is provided with a throttling orifice plate, and the diameter of the throttling orifice plate is adjusted to ensure that enough water pressure is used for washing the filter screen and the pH electrode.

The utility model discloses an absorption tower static pressure carries the limestone slurry to measuring device, has avoided the inside various interference factors of absorption tower, has improved the measurement accuracy, has reduced the plant maintenance volume, has saved technology water quantity and pit pump energy consumption.

These features and advantages of the present invention will be disclosed in more detail in the following detailed description and the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

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

Description of reference numerals: 1. a slurry inlet valve; 2. a glass fiber reinforced plastic inlet pipe; 3. a restriction orifice plate; 4. a pH measuring cell drain valve; 5. a density measurement cell discharge valve; 6. a density measurement cell inlet valve; 7. a first diaphragm differential pressure transmitter interface; 8. a second diaphragm differential pressure transmitter interface; 9. a density measuring cell overflow pipe; 10. a pH meter interface; 11. an overflow pipe of the pH measuring pool; 12. filtering with a screen; 13. a tapered diffuser pipe; 14. flushing a water valve; 15. a pH measuring cell; 16. a density measuring cell; 17. an automatic control system.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Referring to fig. 1, in the present embodiment: an automatic density and pH measuring device of a wet desulphurization absorption tower comprises a slurry inlet valve 1, wherein the slurry inlet valve 1 is connected with a slurry inlet pipe welded on the absorption tower, the slurry inlet valve 1 is connected with a glass fiber reinforced plastic inlet pipe 2 through a flange, the other end of the glass fiber reinforced plastic inlet pipe 2 is connected with a conical diffuser pipe 13 through a flange, a pH measuring pool 15 is installed at the top of the conical diffuser pipe 13, the pH measuring pool 15 is provided with a connected density measuring pool 16 through a side wall, the inlet of the density measuring pool 16 is provided with a density measuring pool inlet valve 6 and a density measuring pool discharge valve 5, the side wall of the density measuring pool 16 is provided with a first diaphragm type differential pressure transmitter interface 7 and a second diaphragm type differential pressure transmitter interface 8, the side wall of the density measuring pool 16 is provided with a density measuring pool overflow pipe 9, the middle part of the pH measuring pool 15 is provided with a filter screen 12, the side wall of the pH measuring pool 15 is provided with a pH meter interface 10, the pH measuring pool 15 is connected with the density measuring pool 16 through the pH meter interface 10, the upper side wall of the pH measuring pool 15 is provided with a pH measuring pool 11, limestone slurry in the absorption tower enters the conical diffuser pipe 13 firstly, a part of the density measuring pool 16 after the flow rate is reduced, and the other part of the limestone slurry flows into the density measuring pool, and the other part of the pH measuring pool is measured by the pH measuring pool, and the other part of the limestone slurry flows into the pH measuring pool, and the limestone slurry inlet pipe.

As an alternative embodiment, the pH measuring cell 15 is provided with an electrode slot for connecting a pH meter, and the electrode slot is positioned at a position lower than the position of the overflow pipe 11 of the pH measuring cell.

As an alternative embodiment, a bottom pipeline of the conical diffuser pipe 13 is provided with a pH measuring tank discharge valve 4, one end of the pH measuring tank discharge valve 4 is connected with a discharge pipe, and a throttle orifice plate 3 is arranged between the pH measuring tank discharge valve 4 and the conical diffuser pipe 13; one end of the pH measuring pool discharge valve 4 is provided with a throttle orifice 3, and an overflow pipe of the throttle orifice is connected with the pit through a pipeline.

As an alternative embodiment, a flushing assembly is further included, and the flushing assembly includes a flushing water valve 14 and a flushing pipe, and the flushing pipe is installed at one end of the flushing water valve 14, and a corresponding flushing process can be realized by using the flushing water valve 14.

As an alternative embodiment, the inlet position of the discharge valve 4 of the pH measuring cell is provided with a throttling orifice plate 3, the inlet of the discharge valve 4 of the pH measuring cell is provided with the throttling orifice plate 3, and the diameter of the throttling orifice plate 3 can be adjusted to ensure that enough water pressure can wash the filter screen 12 and the pH electrode.

As an alternative embodiment, the density measuring cell inlet valve 6 and the density measuring cell discharge valve 5 are electric valves, solenoid valves or pneumatic valves. The automatic control system 17 is further included, the automatic control system 17 is respectively connected with the flushing water valve 14, the density measuring cell inlet valve 6, the slurry inlet valve 1 and the pH measuring cell discharge valve 4, and the automatic control system 17 is a PLC or DCS system.

Wherein the glass fiber reinforced plastic inlet pipe 2 can be replaced by 235 carbon steel lining rubber. The density measuring cell inlet valve 6 and the density measuring cell discharge valve are electric valves, electromagnetic valves or pneumatic valves, and the states of the valves are controlled and monitored by an automatic control system.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. The utility model provides an automatic density of wet flue gas desulfurization absorption tower and pH measuring device which characterized in that: including thick liquid import valve (1), thick liquid import valve (1) links to each other with the entering thick liquid pipe of welding at the absorption tower, thick liquid import valve (1) has glass steel to import pipe (2) through flange joint, the other end of glass steel import pipe (2) has toper diffuser pipe (13) through flange joint, pH measuring cell (15) are installed at the top of toper diffuser pipe (13), pH measuring cell (15) are provided with density measurement pond (16) that is connected through the lateral wall, density measurement pond (16) import is provided with density measurement pond import valve (6) and density measurement pond discharge valve (5), the lateral wall of density measurement pond (16) is provided with first diaphragm type differential pressure transmitter interface (7) and second diaphragm type differential pressure transmitter interface (8), the lateral wall of density measurement pond (16) is provided with density measurement pond overflow pipe (9), the middle part of pH measurement pond (15) is provided with filter screen (12), the lateral wall of pH measurement pond (15) is provided with pH meter interface (10), pH measurement pond (15) is connected with density measurement pond upside through pH meter interface (10), the pH measurement pond upside (11) overflow pipe (11) are provided with pH measurement pond.

2. The automatic density and pH measuring device of the wet desulphurization absorption tower according to claim 1, characterized in that: and an electrode slot for connecting a pH meter is arranged on the pH measuring cell (15).

3. The automatic density and pH measuring device of the wet desulphurization absorption tower according to claim 1, characterized in that: the device is characterized in that a pH measuring pool discharge valve (4) is installed on a bottom pipeline of the conical diffuser pipe (13), one end of the pH measuring pool discharge valve (4) is connected with a discharge pipe, and a throttle orifice plate (3) is installed between the pH measuring pool discharge valve (4) and the conical diffuser pipe (13).

4. The automatic density and pH measuring device of the wet desulphurization absorption tower according to claim 1, characterized in that: the washing device is characterized by further comprising a washing assembly, wherein the washing assembly comprises a washing water valve (14) and a washing pipe, and the washing pipe is installed at one end of the washing water valve (14).

5. The automatic density and pH measuring device of the wet desulphurization absorption tower according to claim 3, characterized in that: the orifice plate (3) is arranged at the inlet position of the discharge valve (5) of the density measuring pool.

6. The automatic density and pH measuring device of the wet desulphurization absorption tower according to claim 1, characterized in that: the density measuring cell inlet valve (6) and the density measuring cell discharge valve (5) are electric valves, electromagnetic valves or pneumatic valves.

7. The automatic density and pH measuring device of the wet desulphurization absorption tower according to claim 1, characterized in that: still include automatic control system (17), automatic control system (17) are connected with washing water valve (14), density measurement cell import valve (6), thick liquid import valve (1) and pH measurement cell discharge valve (4) respectively, just automatic control system (17) are PLC or DCS system.