CN114720248A - A kind of slurry multi-stage rotation comprehensive measurement method and device - Google Patents

Abstract

The invention discloses a multi-stage rotary comprehensive measuring device for slurry, comprising a desulfurization tower, a first valve, a measuring device connected with the desulfurization tower through the first valve, a first branch pipe, a second branch pipe, a third branch pipe and nested spraying device, the desulfurization tower is provided with a desulfurization tower inlet on the side wall, the desulfurization tower is provided with a desulfurization tower outlet, the first valve is connected with the desulfurization tower, and the first branch pipe, the second branch pipe and the third branch pipe are all connected to the first branch pipe. valve connection, a slurry delivery valve is installed on the first branch pipe, the second branch pipe and the third branch pipe, the first branch pipe, the second branch pipe and the third branch pipe are connected with the nesting spraying device, the nesting The shotcrete device is located at the bottom of the measuring device. The invention has the following advantages: 1. No mechanical rotating parts, saving energy consumption; 2. The pressure transmitter and the PH meter are installed on the measuring device to avoid the wear of the equipment; 3. The pressure transmitter and the PH meter are easy to repair and replace .

Description

A kind of slurry multi-stage rotation comprehensive measurement method and device

technical field

The invention relates to a multi-stage rotary comprehensive measuring method and device for slurry, and relates to a device for measuring the density value and pH value of limestone/gypsum slurry in a desulfurization system of a thermal power plant.

Background technique

With the increasingly serious air pollution problem, flue gas desulfurization has become an indispensable measure in industrial production. Wet flue gas desulfurization is the most widely used and mature technology among various desulfurization processes. 90% of existing coal-fired power plants use limestone/gypsum wet desulfurization technology. The density and pH value of the slurry in the desulfurization tower are two important indicators for the operation control of the desulfurization system, and are also important factors that directly affect the desulfurization efficiency of the coal-fired unit. Therefore, it is necessary to accurately measure the density and pH value of the slurry online and continuously.

Prior art measurement methods:

First, the pH meter and density meter are installed on the tower body of the desulfurization tower, but after years of practice, this method is not effective, and it is difficult to repair and maintain, and it has been rarely used;

Second, install the density meter on the bypass branch of the outlet pipeline of the gypsum discharge pump. The disadvantage of this method is that due to the high outlet pressure of the gypsum discharge pump, the density meter wears quickly and the service cycle is short. It reduces the power consumption of the gypsum discharge pump and increases the maintenance cost of the equipment.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a device and method with high equipment integration, accurate measurement, simple operation and reliable operation for solving the deficiencies of the prior art.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical scheme: a slurry multi-stage rotary comprehensive measuring device, comprising a desulfurization tower, a first valve, a measuring device connected with the desulfurization tower through the first valve, a first branch pipe, a second The branch pipe, the third branch pipe and the nested spraying device, the desulfurization tower side wall is provided with a desulfurization tower inlet, the desulfurization tower is provided with a desulfurization tower outlet, the first valve is connected with the desulfurization tower, the first branch pipe, the first The second branch pipe and the third branch pipe are all connected with the first valve, a slurry delivery valve is installed on the first branch pipe, the second branch pipe and the third branch pipe, and the first branch pipe, the second branch pipe and the third branch pipe are connected with the embedded valve A set of shotcrete devices are connected, and the nested shotcrete devices are located at the bottom of the measuring device.

In the above-mentioned multi-stage rotary comprehensive measuring device for slurry, the nested spraying device includes a straight-through slurry pipe connected with the first branch pipe, an axial swirling slurry pipe connected with the second branch pipe, and a slurry pipe connected with the second branch pipe. The radial swirl slurry pipe connected to the third branch pipe, the straight-through slurry pipe is sleeved in the axial swirl slurry pipe, the axial swirl slurry pipe is sleeved in the radial swirl slurry pipe, the straight-through slurry pipe, One end of the axial swirling slurry pipe and the radial swirling slurry pipe are located inside the measuring device.

In the aforementioned slurry multi-stage rotary comprehensive measuring device, it also includes an overflow port connected with the measuring device, an overflow pipe connected with the overflow port, a sewage valve connected with the measuring device, and a PH connected with the measuring device. The meter installation port and the pressure transmitter connected with the measuring device.

In the above-mentioned slurry multi-stage rotation comprehensive measuring device, an axial cyclone device is arranged inside the axial cyclone slurry pipe.

In the above-mentioned slurry multi-stage rotary comprehensive measuring device, a radial cyclone device is arranged inside the radial cyclone slurry pipe.

In the above-mentioned slurry multi-stage rotation comprehensive measuring device, the axial swirl device includes an axial vane, an inner sleeve and an outer sleeve, and the axial vane is arranged between the inner sleeve and the outer sleeve.

In the aforementioned multi-stage rotary comprehensive measuring device for slurry, the radial swirling device includes radial vanes and a bottom plate, and the radial vanes are mounted on the bottom plate.

In the aforementioned slurry multi-stage rotary comprehensive measuring device, the pressure transmitter includes a first nozzle connected to the measuring device and a second nozzle connected to the measuring device, and the first nozzle is arranged on the second nozzle. Above the nozzle, the center height difference between the first nozzle and the second nozzle is h, and the value of h is not less than 110mm.

In the above-mentioned slurry multi-stage rotary comprehensive measuring device, the liquid level in the desulfurization tower is higher than the liquid level in the measuring device, and the difference between the liquid level in the desulfurization tower and the liquid level in the measuring device is m.

The measurement method of the above-mentioned slurry multi-stage rotary comprehensive measurement device includes the following contents:

Make the slurry in the desulfurization tower enter the measuring device through the first branch pipe through the straight-through slurry pipe, and also make the slurry enter the measuring device through the second branch pipe through the axial swirling slurry pipe, and the slurry will also pass through the third branch pipe. The swirling slurry tube enters the measuring device, and the slurry entering the measuring device through the axial swirling slurry tube is sprayed into the cone at the bottom of the measuring device at a certain flow speed after passing through the action of the axial vanes in the axial swirling device. The slurry entering the measuring device through the radial swirl slurry pipe is sprayed into the cone at the bottom of the measuring device at a higher rotational speed after passing through the radial blades in the radial swirl device, so that the through-embedded The slurry ejected by the sleeve shotcrete device has both forward axial speed and circumferential tangential speed, which makes the slurry strongly disturbed. Set the straight-through slurry pipe at the center of the outlet of the nested shotcrete device to ensure the central position of the measuring device. At the same time, due to the action of swirling flow, the slurry velocity is higher at the center of the outlet of the nested spraying device, forming a low pressure area; due to the existence of the low pressure area, the upper layer of the slurry in the measuring device is entrained into the nesting spraying device. The position of the outlet of the slurry device forms a stable backflow area, thereby enhancing the turbulent effect of the slurry at the bottom of the cone of the measuring device, so that the slurry forms a rotating upward flow state in the measuring device, so that the slurry will not be deposited inside the measuring device. Ensure the accuracy of the slurry density and pH value measured by the measuring device.

The density and pH value of the slurry can be accurately measured by the device and method of the present invention. Compared with the prior art, the present invention has the following advantages: 1. No mechanical rotating parts, saving energy consumption; 2. The pressure transmitter and the PH meter are installed on the measuring device to avoid the wear of the equipment; 3. The pressure transmission The maintenance and replacement of the device and the PH meter are convenient.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification, and are used to explain the present invention together with the embodiments of the present invention, and do not constitute an unreasonable limitation to the present invention. In the attached image:

Fig. 1 is the structural representation of the slurry multistage rotary comprehensive measuring device of the present invention;

Fig. 2 is the structural schematic diagram of the measuring device of the present invention

Fig. 3 is the schematic diagram of the axial swirl device of the present invention;

Fig. 4 is the schematic diagram of radial swirl device of the present invention;

Figure 5 is a schematic diagram of the nested spray device of the present invention.

Reference numerals: 1- Desulfurization tower outlet, 2- Desulfurization tower inlet, 3- Nested shotcrete device, 4- Desulfurization tower, 5- First valve, 6- Third branch pipe, 7- Second branch pipe, 8- No. One pipe, 9-drain valve, 10-axial swirl device, 11-radial swirl device, 12-first nozzle, 13-overflow pipe, 14-PH meter installation port, 15-overflow port, 16- Measuring device, 17- Second nozzle, 18- Pressure transmitter, 19- Radial vane, 20- Bottom plate, 21- Axial vane, 22- Outer casing, 23- Inner casing, 24- DC Slurry pipe, 25-axial swirl slurry pipe, 26-radial swirl slurry pipe.

The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

Detailed ways

In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention. It should be noted that the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to the explicit Instead, those steps or elements listed may include other steps or elements not expressly listed or inherent to the process, method, product or apparatus.

Embodiment 1 of the present invention: a multi-stage rotary comprehensive measuring device for slurry, comprising a desulfurization tower 4, a first valve 5, a measuring device 16 connected to the desulfurization tower 4 through the first valve 5, a first branch pipe 8, and a second branch pipe 7. The third branch pipe 6 and the nested spraying device 3, the desulfurization tower inlet 2 is provided on the side wall of the desulfurization tower 4, the desulfurization tower outlet 1 is arranged in the desulfurization tower 4, and the first valve 5 is connected with the desulfurization tower 4 , the first branch pipe 8, the second branch pipe 7 and the third branch pipe 6 are all connected with the first valve 5, and a slurry delivery valve is installed on the first branch pipe 8, the second branch pipe 7 and the third branch pipe 6, The first branch pipe 8 , the second branch pipe 7 and the third branch pipe 6 are connected to the nested shotcrete device, and the nested shotcrete device 3 is located at the bottom of the measuring device 16 .

Embodiment 2 of the present invention: a slurry multi-stage rotary comprehensive measuring device, comprising a desulfurization tower 4, a first valve 5, a measuring device 16 connected to the desulfurization tower 4 through the first valve 5, a first branch pipe 8, and a second branch pipe 7. The third branch pipe 6 and the nested spraying device 3, the desulfurization tower inlet 2 is provided on the side wall of the desulfurization tower 4, the desulfurization tower outlet 1 is arranged in the desulfurization tower 4, and the first valve 5 is connected with the desulfurization tower 4 , the first branch pipe 8, the second branch pipe 7 and the third branch pipe 6 are all connected with the first valve 5, and a slurry delivery valve is installed on the first branch pipe 8, the second branch pipe 7 and the third branch pipe 6, The first branch pipe 8 , the second branch pipe 7 and the third branch pipe 6 are connected to the nested shotcrete device 3 , and the nested shotcrete device 3 is located at the bottom of the measuring device 16 . The nested spraying device 3 includes a straight-through slurry pipe 24 connected with the first branch pipe 8 , an axial swirling slurry pipe 25 connected with the second branch pipe 7 , and an axial swirling slurry pipe 25 connected with the third branch pipe 6 . The radial swirl slurry pipe 26, the straight-through slurry pipe 24 is sleeved in the axial swirl slurry pipe 25, the axial swirl slurry pipe 25 is sleeved in the radial swirl slurry pipe 26, and the straight-through slurry pipe 24. One end of the axial swirling slurry pipe 25 and the radial swirling slurry pipe 26 are both located inside the measuring device 16 .

Embodiment 3 of the present invention: a slurry multi-stage rotary comprehensive measuring device, comprising a desulfurization tower 4, a first valve 5, a measuring device 16 connected to the desulfurization tower 4 through the first valve 5, a first branch pipe 8, and a second branch pipe 7. The third branch pipe 6 and the nested spraying device 3, the desulfurization tower inlet 2 is provided on the side wall of the desulfurization tower 4, the desulfurization tower outlet 1 is arranged in the desulfurization tower 4, and the first valve 5 is connected with the desulfurization tower 4 , the first branch pipe 8, the second branch pipe 7 and the third branch pipe 6 are all connected with the first valve 5, and a slurry delivery valve is installed on the first branch pipe 8, the second branch pipe 7 and the third branch pipe 6, The first branch pipe 8 , the second branch pipe 7 and the third branch pipe 6 are connected to the nested shotcrete device 3 , and the nested shotcrete device 3 is located at the bottom of the measuring device 16 . The nested spraying device 3 includes a straight-through slurry pipe 24 connected with the first branch pipe 8 , an axial swirling slurry pipe 25 connected with the second branch pipe 7 , and an axial swirling slurry pipe 25 connected with the third branch pipe 6 . The radial swirl slurry pipe 26, the straight-through slurry pipe 24 is sleeved in the axial swirl slurry pipe 25, the axial swirl slurry pipe 25 is sleeved in the radial swirl slurry pipe 26, and the straight-through slurry pipe 24. One end of the axial swirling slurry pipe 25 and the radial swirling slurry pipe 26 are both located inside the measuring device 16 . In this example, the slurry multi-stage rotary comprehensive measuring device also includes an overflow port 15 connected to the measuring device 16, an overflow pipe 13 connected to the overflow port 15, a sewage valve 9 connected to the measuring device 16, and the measuring device. 16 is connected to the PH meter installation port 14 , and the pressure transmitter 18 connected to the measuring device 16 .

Embodiment 4 of the present invention: a multi-stage rotary comprehensive measuring device for slurry, comprising a desulfurization tower 4, a first valve 5, a measuring device 16 connected to the desulfurization tower 4 through the first valve 5, a first branch pipe 8, and a second branch pipe 7. The third branch pipe 6 and the nested spraying device 3, the desulfurization tower inlet 2 is provided on the side wall of the desulfurization tower 4, the desulfurization tower outlet 1 is arranged in the desulfurization tower 4, and the first valve 5 is connected with the desulfurization tower 4 , the first branch pipe 8, the second branch pipe 7 and the third branch pipe 6 are all connected with the first valve 5, and a slurry delivery valve is installed on the first branch pipe 8, the second branch pipe 7 and the third branch pipe 6, The first branch pipe 8 , the second branch pipe 7 and the third branch pipe 6 are connected to the nested shotcrete device 3 , and the nested shotcrete device 3 is located at the bottom of the measuring device 16 . The nested spraying device 3 includes a straight-through slurry pipe 24 connected with the first branch pipe 8 , an axial swirling slurry pipe 25 connected with the second branch pipe 7 , and an axial swirling slurry pipe 25 connected with the third branch pipe 6 . The radial swirl slurry pipe 26, the straight-through slurry pipe 24 is sleeved in the axial swirl slurry pipe 25, the axial swirl slurry pipe 25 is sleeved in the radial swirl slurry pipe 26, and the straight-through slurry pipe 24. One end of the axial swirling slurry pipe 25 and the radial swirling slurry pipe 26 are both located inside the measuring device 16 . In this example, the slurry multi-stage rotary comprehensive measuring device also includes an overflow port 15 connected to the measuring device 16, an overflow pipe 13 connected to the overflow port 15, a sewage valve 9 connected to the measuring device 16, and the measuring device. 16 is connected to the PH meter installation port 14 , and the pressure transmitter 18 connected to the measuring device 16 . An axial swirling device 10 is arranged inside the axial swirling slurry pipe 25 . A radial swirling device 11 is arranged inside the radial swirling slurry pipe 26 . The axial swirling device 10 comprises axial vanes 21 , an inner sleeve 23 and an outer sleeve 22 , the axial vanes 21 being arranged between the inner sleeve 23 and the outer sleeve 22 . The radial swirling device 11 includes radial vanes 19 and a base plate 20 on which the radial vanes 19 are mounted.

Embodiment 5 of the present invention: a multi-stage rotary comprehensive measuring device for slurry, comprising a desulfurization tower 4, a first valve 5, a measuring device 16 connected to the desulfurization tower 4 through the first valve 5, a first branch pipe 8, and a second branch pipe 7. The third branch pipe 6 and the nested spraying device 3, the desulfurization tower inlet 2 is provided on the side wall of the desulfurization tower 4, the desulfurization tower outlet 1 is arranged in the desulfurization tower 4, and the first valve 5 is connected with the desulfurization tower 4 , the first branch pipe 8, the second branch pipe 7 and the third branch pipe 6 are all connected with the first valve 5, and a slurry delivery valve is installed on the first branch pipe 8, the second branch pipe 7 and the third branch pipe 6, The first branch pipe 8 , the second branch pipe 7 and the third branch pipe 6 are connected to the nested shotcrete device 3 , and the nested shotcrete device 3 is located at the bottom of the measuring device 16 . The nested spraying device 3 includes a straight-through slurry pipe 24 connected with the first branch pipe 8 , an axial swirling slurry pipe 25 connected with the second branch pipe 7 , and an axial swirling slurry pipe 25 connected with the third branch pipe 6 . The radial swirl slurry pipe 26, the straight-through slurry pipe 24 is sleeved in the axial swirl slurry pipe 25, the axial swirl slurry pipe 25 is sleeved in the radial swirl slurry pipe 26, and the straight-through slurry pipe 24. One end of the axial swirling slurry pipe 25 and the radial swirling slurry pipe 26 are both located inside the measuring device 16 . In this example, the slurry multi-stage rotary comprehensive measuring device also includes an overflow port 15 connected to the measuring device 16, an overflow pipe 13 connected to the overflow port 15, a sewage valve 9 connected to the measuring device 16, and the measuring device. 16 is connected to the PH meter installation port 14 , and the pressure transmitter 18 connected to the measuring device 16 . An axial swirling device 10 is arranged inside the axial swirling slurry pipe 25 . A radial swirling device 11 is arranged inside the radial swirling slurry pipe 26 . The axial swirling device 10 comprises axial vanes 21 , an inner sleeve 23 and an outer sleeve 22 , the axial vanes 21 being arranged between the inner sleeve 23 and the outer sleeve 22 . The radial swirling device 11 includes radial vanes 19 and a base plate 20 on which the radial vanes 19 are mounted. The pressure transmitter 18 includes a first nozzle 12 connected to the measuring device 16 and a second nozzle 17 connected to the measuring device 16. The first nozzle 12 is arranged above the second nozzle 17, and the first pipe The center height difference between the mouth 12 and the second nozzle 17 is h, and the value of h is not less than 110 mm. The liquid level in the desulfurization tower 4 is higher than the liquid level in the measuring device 16 , and the difference between the liquid level in the desulfurization tower 4 and the liquid level in the measuring device 16 is m.

In this example, since the liquid level of the desulfurization tower 4 is higher than the liquid level of the measuring device 16, the slurry in the desulfurization tower 4 enters the measuring device 16 through the first branch pipe 8 through the straight-through slurry pipe 24, and the slurry also passes through the second branch pipe 7. The axial swirling slurry pipe 25 enters the measuring device 16 , and the slurry also enters the measuring device 16 through the radial swirling slurry pipe 26 through the third branch pipe 6 . The slurry entering the measuring device 16 through the axial swirling slurry pipe 25 is sprayed into the cone at the bottom of the measuring device 16 at a certain flow speed after passing through the action of the axial vanes 21 in the axial swirling device 10, and passes through the axial swirling device 10. The slurry entering the measuring device 16 from the radial swirling slurry pipe 26 is sprayed into the cone at the bottom of the measuring device 16 at a relatively high rotational speed after passing through the radial vanes 19 in the radial swirling device 11. The slurry ejected by the sleeve shotcrete device 3 has both a forward axial speed and a circumferential tangential speed, and the slurry disturbance is relatively strong. At the same time, the slurry speed near the center of the outlet of the nested shotcrete device 3 is relatively high, forming a low pressure area; Due to the existence of the low pressure area, the upper slurry in the measuring device 16 is entrained to the position of the outlet of the nested spraying device 3 to form a stable backflow area, thereby enhancing the turbulent effect of the slurry at the bottom of the cone of the measuring device 16, and at the same time The slurry forms a rotating upward flow state in the measuring device 16, which ensures that a dynamic flow process is formed inside the entire measuring device 16, ensures that the slurry does not deposit inside the measuring device 16, and ensures the accuracy of density and pH value.

The working principle of the present invention:

As shown in Figure 1, the liquid level in the desulfurization tower 4 is higher than the liquid level in the measuring device 16, and the slurry in the desulfurization tower 4 passes through the first branch pipe 8, the second branch pipe 7 and the third branch pipe 6, and then passes through the straight-through slurry pipe 24, The axial swirling slurry pipe 25 and the radial swirling slurry pipe 26 enter the measuring device 16 . Among them, a part of the slurry enters the measuring device 16 through the straight-through slurry pipe 24; since another part of the slurry enters the measuring device 16 through the axial cyclone slurry pipe 25 and the radial cyclone slurry pipe 26, it has passed through the axial cyclone device 10. The action of the axial vanes 21 and the radial vanes 19 in the radial swirl device 11 enters the bottom cone of the measuring device 16 at a certain speed and a relatively high rotational speed. a return zone;

At the same time, the axial vane 21 can be adjusted by properly adjusting the opening of the first valve 5 and the slurry delivery valve (not shown in the figure) installed on the first branch pipe 8, the second branch pipe 7 and the third branch pipe 6 respectively. and the angle of the radial vanes 19, etc., the flow rate and rotation speed of the slurry entering the measuring device 16 can be adjusted, and the area of the low pressure return zone can be enlarged or reduced according to the adjustment. The size of the recirculation zone can be adjusted by adjusting the rotation intensity of the slurry sprayed into the measuring device 16 ; the larger the rotation intensity, the larger the recirculation area; the smaller the rotation intensity, the smaller the recirculation area. The larger the recirculation zone, the greater the slurry disturbance, and the slurry is not easy to deposit, but if the slurry disturbance is larger, the measuring device 16 will vibrate, which will bring safety risks to the equipment; therefore, the size of the recirculation zone can be adjusted according to the actual operating conditions.

Due to the existence of the low-pressure reflux zone, the residence time of the slurry in the reflux zone can be increased, and the turbulent flow of the slurry at the bottom of the cone of the measuring device 16 can be enhanced. The interior of 16 forms a dynamic flow process to ensure that the slurry does not deposit inside the measuring device 16, and to ensure the accuracy of the measured slurry density and pH value.

Because the slurry continuously rotates and flows upward in the measuring device 16, the slurry inside the measuring device 16 is always in a flowing state, which avoids the deposition of the slurry. Causes damage to the pressure transmitter 18 and the pH meter installed at the pH meter mounting port 14 .

At the same time, because the measuring device 16 is in communication with the desulfurization tower 4, the straight-through slurry pipe 24, the swirling slurry pipe 25 and the radial swirl slurry pipe 26 of the nested spraying device 3 are always in the spraying state, so the slurry in the measuring device 16 is always in the spraying state. The flow state ensures that the slurry in the measuring device 16 is always consistent with the slurry in the desulfurization tower 4, and the accuracy of the slurry density and pH value measurement is ensured.

Since the slurry continuously flows from the desulfurization tower 4 to the measuring device 16, when the measuring device 16 operates normally, the blowdown valve 9 is closed, and the slurry is discharged into the pit from the overflow port 15. When the measuring device 16 stops running, the first valve 5 is closed, and the sewage valve 9 is opened to discharge the slurry inside the measuring device 16 into the pit.

Claims (10)

1. a slurry multistage rotating comprehensive measuring device, is characterized in that, comprises the measuring device (16) that desulfurization tower (4), the first valve (5), and the desulfurization tower (4) are connected by the first valve (5) , the first branch pipe (8), the second branch pipe (7), the third branch pipe (6) and the nested spraying device (3), the desulfurization tower (4) side wall is provided with a desulfurization tower inlet (2), The desulfurization tower (4) is provided with a desulfurization tower outlet (1), the first valve (5) is connected with the desulfurization tower (4), the first branch pipe (8), the second branch pipe (7) and the third branch pipe ( 6) All are connected with the first valve (5), a slurry delivery valve is installed on the first branch pipe (8), the second branch pipe (7) and the third branch pipe (6), the first branch pipe (8) ), the second branch pipe (7) and the third branch pipe (6) are connected to the nested shotcrete device (3), which is located at the bottom of the measuring device (16). 2. A slurry multi-stage rotary comprehensive measuring device according to claim 1, wherein the nested spraying device (3) comprises a straight-through slurry pipe (24) connected with the first branch pipe (8) ), the axial swirl slurry pipe (25) connected with the second branch pipe (7) and the radial swirl slurry pipe (26) connected with the third branch pipe (6), the straight-through slurry pipe ( 24) Sleeve in the axial swirl slurry pipe (25), the axial swirl slurry pipe (25) is sleeved in the radial swirl slurry pipe (26), the straight-through slurry pipe (24), the axial One end of the swirling slurry pipe (25) and the radial swirling slurry pipe (26) are both located inside the measuring device (16). 3. a kind of slurry multi-stage rotary comprehensive measuring device according to claim 2, is characterized in that, also comprises the overflow port (15) connected with the measuring device (16), the overflow port (15) connected with the overflow port (15) The flow pipe (13), the blowdown valve (9) connected with the measuring device (16), the PH meter installation port (14) connected with the measuring device (16), the pressure change valve connected with the measuring device (16) feeder (18). 4. A slurry multi-stage rotation comprehensive measuring device according to claim 3, characterized in that, an axial cyclone device (10) is arranged inside the axial cyclone slurry pipe (25). 5 . The multi-stage rotary comprehensive measuring device for slurry according to claim 4 , wherein a radial swirling device ( 11 ) is arranged inside the radial swirling slurry pipe ( 26 ). 6 . 6. A slurry multi-stage rotary comprehensive measuring device according to claim 5, wherein the axial swirl device (10) comprises an axial vane (21), an inner sleeve (23) and an outer sleeve A tube (22), said axial vanes (21) being arranged between the inner sleeve (23) and the outer sleeve (22). 7. A slurry multi-stage rotation comprehensive measuring device according to claim 6, characterized in that, the radial swirling device (11) comprises radial vanes (19) and a bottom plate (20), the radial The blade (19) is mounted on the bottom plate (20). 8. A slurry multi-stage rotary comprehensive measuring device according to claim 7, wherein the pressure transmitter (18) comprises a first nozzle (12) connected with the measuring device (16), and a second nozzle (17) connected to the measuring device (16), the first nozzle (12) is arranged above the second nozzle (17), the first nozzle (12) and the second nozzle (17) ) center height difference is h, and the value of h is not less than 110mm. 9. A slurry multi-stage rotary comprehensive measuring device according to claim 8, wherein the inner liquid level of the desulfurization tower (4) is higher than the liquid level in the measuring device (16), and the desulfurization tower (4) The difference between the liquid level in ) and the liquid level in the measuring device (16) is m not less than 1000mm. 10. The measuring method of a slurry multi-stage rotary comprehensive measuring device according to claims 1 to 9, characterized in that it comprises making the slurry in the desulfurization tower enter the measuring device through the first branch pipe through the straight-through slurry pipe, and simultaneously. The slurry enters the measuring device through the second branch pipe through the axial cyclone slurry pipe, and the slurry also enters the measuring device through the radial cyclone slurry pipe through the third branch pipe; the slurry enters the measuring device through the axial cyclone slurry pipe After passing through the action of the axial vanes in the axial swirling device, it is sprayed into the cone at the bottom of the measuring device at a certain flow speed, and the slurry entering the measuring device through the radial swirling slurry pipe passes through the radial swirling flow. After the radial vanes in the device act, they are sprayed into the cone at the bottom of the measuring device at a high rotational speed, so that the slurry sprayed through the nested spray device has a forward axial speed and a circumferential tangential direction at the same time. speed, so that the slurry disturbance is strong, and the direct-flow slurry pipe is set at the center of the outlet of the nested shotcrete device to ensure that the slurry at the center of the measuring device does not deposit. Due to the existence of the low pressure area, the upper layer of the slurry in the measuring device is entrained to the position of the outlet of the nested shotcrete device, forming a stable backflow area, thereby enhancing the concentration of the slurry in the measuring device cone. The turbulent flow at the bottom makes the slurry form a rotating upward flow state in the measuring device, so that the slurry will not deposit inside the measuring device, thereby ensuring the accuracy of the slurry density and pH value measured by the measuring device.

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