Online viscosity measuring device for biogas slurry of wet anaerobic fermentation tank

Abstract

The utility model relates to a wet type anaerobic fermentation tank biogas slurry on-line viscosity measuring device which comprises a bypass pipeline arranged on the tank wall of a fermentation tank, the bypass pipeline comprises a vertical measuring channel, the top end of the vertical measuring channel is provided with a vertical extending pipe section, and the bottom of the vertical measuring channel is provided with a first valve with a first valve plate; the vertical extending pipe section is provided with a second valve with a second valve plate, the first valve and the second valve plate are arranged along the horizontal section, a falling ball is placed on the second valve plate, and free falling of the falling ball is controlled by controlling movement of the second valve plate. The falling ball is controlled to fall onto the first valve plate by controlling the movement of the first valve plate, and meanwhile, the bypass pipeline is controlled to be connected and disconnected; the vertical measurement channel is provided with a first sensor and a second sensor which are arranged at an interval in the vertical direction; the viscosity of the biogas slurry is measured according to the time difference of the falling ball passing through the first sensor and the second sensor.

Description

TECHNICAL FIELD

[0001] The utility model relates to anaerobic fermentation technical field, especially a kind of wet anaerobic fermentation tank biogas slurry online viscosity measuring device. BACKGROUND

[0002] Kitchen waste fermentation needs to detect the viscosity of fermentation biogas slurry multiple times per day to judge fermentation effect. Then according to fermentation state, process adjustment is carried out to make fermentation more sufficient to achieve optimal benefit.

[0003] The falling ball method detects the viscosity of biogas slurry, which is a precise measurement method. The falling ball method has less sensitivity to the environment, and it requires the biogas slurry to be still during measurement. Currently, the conventional method for measuring biogas slurry viscosity is manual sampling, and then the viscosity is measured by the ball falling method in the laboratory. Manual sampling for viscosity measurement consumes a lot of labor and is not timely.

[0004] It is particularly important to measure the viscosity online quickly and frequently without sampling. UTILITY MODEL CONTENT

[0005] In view of the deficiencies of the existing technology, the utility model provides a wet anaerobic fermentation tank biogas slurry online viscosity measuring device to eliminate manual sampling of biogas slurry and realize online, frequent and rapid measurement of the viscosity of biogas slurry in a wet anaerobic fermentation tank.

[0006] To achieve the above purpose, the utility model provides a wet anaerobic fermentation tank biogas slurry online viscosity measuring device, which has the following technical solutions: the device includes a bypass pipeline arranged on the wall of the fermentation tank, the bypass pipeline includes a vertical measurement channel, the top end of the vertical measurement channel has a vertical extension pipe section, the bottom of the vertical measurement channel is provided with a first valve having a first valve plate, the vertical extension pipe section is provided with a second valve having a second valve plate, the first valve and the second valve plate are arranged along the horizontal section, the second valve plate rests on a falling ball, the free fall of the falling ball is controlled by controlling the movement of the second valve plate, and the falling ball falls on the first valve plate while controlling the on-off of the bypass pipeline by controlling the movement of the first valve plate, the vertical measurement channel has a first sensor and a second sensor arranged at intervals in the vertical direction, and the viscosity of the biogas slurry is measured by the time difference of the falling ball passing through the first sensor and the second sensor.

[0007] Preferably, the bypass pipeline comprises a first connecting channel and a second connecting channel, the first connecting channel connects the top of the vertical measuring channel and the fermentation tank, the second connecting channel connects the bottom of the vertical measuring channel and the fermentation tank, the first connecting channel is provided with a third valve for controlling the opening and closing of the first connecting channel, the third valve is closed in the measuring state, and the third valve is opened in the non-measuring state.

[0008] Preferably, the first connecting channel is a horizontal connecting channel, and the second connecting channel is an inclined downward connecting channel.

[0009] Preferably, the top end of the vertically extending pipe section is provided with a grabbing cylinder and a cylinder rod connected with the grabbing cylinder, the bottom end of the cylinder rod is provided with a gripper for grabbing the falling ball, the grabbing cylinder drives the cylinder rod to elongate so that the gripper grabs the falling ball falling on the first valve plate, and drives the cylinder rod to shorten so that the gripper grabs back and falls back the falling ball on the second valve plate.

[0010] Preferably, the upper side of the second valve plate is provided with a blocking plate, the blocking plate has a center hole, the diameter of the center hole is smaller than the diameter of the falling ball and larger than the outer diameter of the gripper, so that the blocking plate allows the gripper to pass through the center hole and does not allow the falling ball to pass through the center hole to fall back the falling ball on the second valve plate.

[0011] Preferably, the bottom of the center hole is provided with a guide part.

[0012] Preferably, the gripper and the falling ball have a magnetic attraction.

[0013] Preferably, the falling ball has an inner core and an outer shell, the inner core is a magnet inner core, and the outer shell is a stainless steel outer shell; the gripper has an inner layer and an outer layer, the inner layer is a carbon steel inner layer, and the outer layer is a stainless steel outer layer.

[0014] Preferably, the top end of the vertically extending pipe section is provided with a cleaning mechanism for cleaning the gripper.

[0015] Preferably, the first valve and the second valve are both pneumatic valves, and the first sensor and the second sensor are both magnetic sensors.

[0016] The wet anaerobic fermentation tank biogas slurry online viscosity measuring device does not need manual sampling, saves labor cost, can realize online, rapid and multiple frequency measurement of biogas slurry viscosity, provides process adjustment basis for operators, and thus makes garbage treatment more efficient and economical. BRIEF DESCRIPTION OF DRAWINGS

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the embodiments are briefly introduced below.

[0018] Figure 1 This is a schematic diagram of the online viscosity measurement device for wet anaerobic digester slurry of this utility model.

[0019] Figure 2 This is a cross-sectional view of the online viscosity measurement device for wet anaerobic digester slurry of this utility model.

[0020] Figures 3 to 9 This is a cross-sectional view of the wet anaerobic digester biogas slurry online viscosity measuring device of this utility model, starting from the initial state and finally returning to the initial state. Detailed Implementation

[0021] To more clearly describe the technical content of this utility model, the following description is provided in conjunction with specific embodiments.

[0022] like Figures 1 to 9 The image shows a specific embodiment of the online viscosity measuring device for wet anaerobic digester slurry of this utility model. The device includes a bypass pipeline installed on the wall of the fermenter. The bypass pipeline includes a vertical measuring channel 13. The top of the vertical measuring channel 13 has a vertical extension section 14. The bottom of the vertical measuring channel 13 is provided with a first valve 11 having a first valve plate 11-1. The vertical extension section 14 is provided with a second valve 8 having a second valve plate 8-1. The first valve 11 and the second valve plate 8 are both arranged along a horizontal cross section. A falling ball 7 is placed on the second valve plate 8. The free fall of the falling ball 7 is controlled by controlling the movement of the second valve plate 8. The falling ball 7 is controlled to fall onto the first valve plate 11-1 by controlling the movement of the first valve plate 11, and the bypass pipeline is opened and closed simultaneously. The vertical measuring channel 13 has a first sensor 9 and a second sensor 10 arranged at intervals in the vertical direction. The viscosity of the biogas slurry is measured by the time difference between the falling ball 7 passing through the first sensor 9 and the second sensor 10.

[0023] In this embodiment, as Figure 1As shown, the bypass pipeline comprises a first connecting channel 12 and a second connecting channel 15, the first connecting channel 12 connects the top of the vertical measuring channel 13 and the fermentation tank 2, the second connecting channel 15 connects the bottom of the vertical measuring channel 13 and the fermentation tank 2, the first connecting channel 12 is provided with a third valve 3 with a third valve plate 3-1 for controlling the opening and closing of the first connecting channel 12, in the measuring state, the third valve 3 is closed to disconnect the first connecting channel 12; in the non-measuring state, the third valve 3 is opened to open the first connecting channel 12, and the whole bypass pipeline is communicated with the biogas slurry 1 in the fermentation tank 2. Wherein, the first connecting channel 12 is a horizontal connecting channel, and the second connecting channel 15 is an inclined downward connecting channel.

[0024] The first connecting channel 12, the vertical measuring channel 13 and the second connecting channel 15 constitute a bypass pipeline. The vertical measuring channel 13 and the vertically extending pipe section 14 constitute a measuring pipeline. In the non-measuring state, the bypass pipeline and the measuring pipeline are communicated with the fermentation tank 2, and the flow of the material in the fermentation tank 2 makes the material in the measuring device the same as that in the tank; in the measuring state, the third valve and the first valve are closed, and the biogas slurry in the measuring device is isolated from the biogas slurry in the anaerobic tank, at this time, the biogas slurry in the measuring device is in a static state. The second valve 8 is opened, and the falling ball 7 is free falling. When the falling ball passes through the two sensors attached to the pipe wall, the time difference of the falling ball passing through is sensed, and the measurement of the viscosity of the biogas slurry is realized.

[0025] The top end of the vertically extending pipe section 14 is provided with a grabbing cylinder 4 and a cylinder rod connected with the grabbing cylinder 4, the bottom end of the cylinder rod is provided with a grab hand 5 for grabbing the falling ball 7, the grabbing cylinder 4 drives the extension of the cylinder rod to make the grab hand 5 grab the falling ball 7 falling on the first valve plate 11-1, and drives the shortening of the cylinder rod to make the grab hand 5 grab back and fall back the falling ball 7 on the second valve plate 8-1.

[0026] The upper side of the second valve plate 8-1 is provided with a blocking plate 6, the blocking plate 6 has a center hole, the diameter of the center hole is smaller than the diameter of the falling ball 7 and larger than the outer diameter of the grab hand, so that the blocking plate 6 allows the grab hand 5 to pass through the center hole and does not allow the falling ball 7 to pass through the center hole to fall back the falling ball 7 on the second valve plate 8-1. The bottom of the center hole is provided with a guide part to resist and fall back the falling ball 7. As Figure 7 As shown, the grab hand 5 grabs back the falling ball 7 to the guide part of the center hole, through the center hole and its guide part, the falling ball 7 can be separated from the grab hand 5; and in the measurement of viscosity, the falling ball can fall from the middle of the vertical measuring channel 13, so that the measurement is more accurate.

[0027] The magnetic attraction exists between the grab hand 5 and the falling ball 7. Specifically, the falling ball 7 has an inner core and an outer shell, the inner core is a magnet inner core, and the outer shell is a stainless steel outer shell; the grab hand 5 has an inner layer and an outer layer, the inner layer is a carbon steel inner layer, and the outer layer is a stainless steel outer layer. The stainless steel outer shell and the stainless steel outer layer can prevent internal rust, and the magnetic force of the falling ball only acts on the carbon steel of the grab hand.

[0028] The top end of the vertically extending pipe section 14 is provided with a cleaning mechanism for cleaning the grab hand 5 and the falling ball 7 to keep clean and the like.

[0029] The first valve 11, the second valve 8 and the third valve 3 are all pneumatic valves, and the first sensor 9 and the second sensor 10 are both magnetic sensors. In order to eliminate the magnetic influence, the pipes involved in the device can be made of non-magnetic stainless steel, and the air cylinder involved is made of stainless steel.

[0030] As shown in Figures 3 to 9 , the steps of the wet anaerobic fermentation tank biogas slurry online viscosity measuring device in the process of measurement are as follows:

[0031] As shown in Figure 3 , it is the initial state of the device, the third valve 3 and the first valve 11 are in the open state, and the whole bypass pipeline is connected with the biogas slurry in the fermentation tank 2; the second valve 8 is in the closed state, and the falling ball 7 stops on the second valve plate 8-1 of the second valve 8;

[0032] As shown in Figure 4 , the third valve 3 and the first valve 11 are closed, and the second valve 8 is opened, the falling ball 7 falls under the action of gravity, and the falling ball 7 passes through the first sensor 9 and the second sensor 10 in turn, and the sensor sends a signal to the control system for viscosity calculation;

[0033] As shown in Figure 5 , the falling ball finally falls on the valve plate of the first valve 11;

[0034] As shown in Figure 6 , the cylinder rod of the grabbing cylinder 4 starts to stretch to the vicinity above the falling ball 7 with the grab hand 5, and under the action of magnetic force, the falling ball 7 and the grab hand 5 are attracted together;

[0035] As shown in Figure 7 , the cylinder rod of the grabbing cylinder 4 rises with the grab hand 5 and the falling ball 7;

[0036] As shown in Figure 8 , when passing through the second valve 8, the second valve 8 is closed, the cylinder rod continues to rise, the grab hand 5 passes through the center hole of the blocking plate 6, and the falling ball 7 is separated from the grab hand 5 due to the diameter being greater than the center hole, and falls on the valve plate of the second valve 8 which has been closed;

[0037] As shown in Figure 9 opening the third valve 3, the first valve 11, again make the device in the marsh liquid and marsh liquid in the fermentation tank communication, through the marsh liquid flow in the fermentation tank, complete the measurement device in the material replacement, make the marsh liquid in the measurement device and the marsh liquid in the fermentation tank always consistent, guarantee the accuracy of measurement.

[0038] In order to measure more accurately, can be measured multiple times in a short time and take the average value.

[0039] The wet anaerobic fermentation tank marsh liquid on-line viscosity measuring device of the utility model does not need artificial sampling, saves manpower cost, can realize on-line, fast, multiple frequency measurement of marsh liquid viscosity, provides process adjustment basis for operating personnel, so that garbage treatment is more efficient and economical.

[0040] In this specification, the utility model has been described with reference to its specific implementation. However, it is obvious that various modifications and changes can be made without departing from the spirit and scope of the utility model. Therefore, the specification and drawings should be considered as illustrative rather than restrictive.

Claims

1. A wet anaerobic fermentation tank biogas slurry online viscosity measuring device, characterized in that, The device comprises a bypass pipeline arranged on the wall of the fermentation tank, the bypass pipeline comprises a vertical measuring channel, the top end of the vertical measuring channel is provided with a vertically extending pipe section, the bottom of the vertical measuring channel is provided with a first valve with a first valve plate, the vertically extending pipe section is provided with a second valve with a second valve plate, the first valve and the second valve plate are arranged along the horizontal section, the second valve plate is provided with a falling ball, the free fall of the falling ball is controlled by controlling the movement of the second valve plate, and the falling of the falling ball on the first valve plate and the opening and closing of the bypass pipeline are controlled by controlling the movement of the first valve plate, the vertical measuring channel is provided with a first sensor and a second sensor arranged in the vertical direction, and the viscosity of the biogas slurry is measured by the time difference of the falling ball passing through the first sensor and the second sensor.

2. The wet-type anaerobic fermentation tank liquor on-line viscosity measuring device according to claim 1, characterized in that, The bypass pipeline comprises a first connecting channel and a second connecting channel, the first connecting channel connects the top of the vertical measuring channel and the fermentation tank, and the second connecting channel connects the bottom of the vertical measuring channel and the fermentation tank, the first connecting channel is provided with a third valve for controlling the opening and closing of the first connecting channel, the third valve is closed in the measurement state, and the third valve is opened in the non-measurement state.

3. The wet-type anaerobic fermentation tank liquor on-line viscosity measuring device according to claim 2, characterized in that, The first connecting channel is a horizontal connecting channel, and the second connecting channel is an inclined downward connecting channel.

4. The wet-type anaerobic fermentation tank liquor online viscosity measuring device according to claim 1, characterized in that, The top end of the vertically extending pipe section is provided with a grabbing cylinder and a cylinder rod connected with the grabbing cylinder, the bottom end of the cylinder rod is provided with a gripper for grabbing the falling ball, the grabbing cylinder drives the cylinder rod to elongate so that the gripper grabs the falling ball falling on the first valve plate, and the grabbing cylinder drives the cylinder rod to shorten so that the gripper grabs back and falls back the falling ball on the second valve plate.

5. The wet-type anaerobic fermentation tank liquor online viscosity measuring device according to claim 4, characterized in that, The upper side of the second valve plate is provided with a blocking plate, the blocking plate has a center hole, the diameter of the center hole is smaller than the diameter of the falling ball and larger than the outer diameter of the gripper, so that the blocking plate allows the gripper to pass through the center hole and does not allow the falling ball to pass through the center hole to fall back the falling ball on the second valve plate. 6.The wet-type anaerobic fermentation tank biogas slurry online viscosity measuring device according to claim 5, characterized in that, The bottom of the center hole is provided with a guide part.

7. The wet-type anaerobic fermentation tank liquor online viscosity measuring device according to claim 4, characterized in that, The gripper and the falling ball have a magnetic attraction. 8.The wet-type anaerobic fermentation tank biogas slurry online viscosity measuring device according to claim 7, characterized in that, The falling ball has an inner core and an outer shell, the inner core is a magnet core, and the outer shell is a stainless steel shell; the gripper has an inner layer and an outer layer, the inner layer is a carbon steel inner layer, and the outer layer is a stainless steel outer layer. 9.The wet-type anaerobic fermentation tank biogas slurry online viscosity measuring device according to claim 4, characterized in that, The top end of the vertically extending pipe section is provided with a cleaning mechanism for cleaning the gripper. 10.The wet anaerobic fermentation tank biogas slurry online viscosity measuring device according to claim 1, characterized in that, The first valve and the second valve are both pneumatic valves, and the first sensor and the second sensor are both magnetic sensors.

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