CN-121974539-A - Sludge solid-liquid separation method, system, computer equipment and storage medium

CN121974539ACN 121974539 ACN121974539 ACN 121974539ACN-121974539-A

Abstract

The invention provides a sludge solid-liquid separation method, a system, computer equipment and a storage medium. The method for separating the solid from the liquid of the sludge comprises the following steps of obtaining the real-time accumulated filtrate quality and the solid concentration of the sludge. And comparing the real-time accumulated filtrate quality with a squeezing start threshold. If the real-time accumulated filtrate mass is greater than or equal to the squeezing start threshold, the filtering stage is started to enter the squeezing stage. The filtering pressure of the filtering stage is a constant value, the squeezing pressure of the squeezing stage is dynamically adjusted according to the solid concentration of the sludge, and the squeezing pressure is larger than the filtering pressure. According to the sludge solid-liquid separation method provided by the invention, the accumulated filtrate quality is obtained in real time and is compared with the squeezing starting threshold, when the accumulated filtrate quality is greater than or equal to the squeezing starting threshold, the filtering stage is automatically switched to the squeezing stage, so that invalid waiting with extremely low efficiency in the later stage of filtering is avoided, the whole dehydration period is shortened, and the energy consumption and the treatment cost are reduced.

Inventors

LI ZHIGANG
WANG ZHENFENG
AN XIAOJIANG

Assignees

东莞固润科技有限公司

Dates

Publication Date: 20260505
Application Date: 20260122

Claims (10)

1. The solid-liquid separation method for the sludge is characterized by comprising the following steps of: Acquiring real-time accumulated filtrate quality and sludge solid concentration; comparing the real-time accumulated filtrate quality with a squeezing starting threshold; if the real-time accumulated filtrate mass is greater than or equal to the squeezing starting threshold, entering a squeezing stage from a filtering stage; The filtering pressure of the filtering stage is a constant value, the squeezing pressure of the squeezing stage is dynamically adjusted according to the sludge solid concentration, and the squeezing pressure is larger than the filtering pressure.
2. The method of solid-liquid separation of sludge according to claim 1, wherein after the step of comparing the real-time accumulated filtrate quality data with a press start threshold value, further comprising: And if the real-time accumulated filtrate quality is smaller than the squeezing starting threshold, continuing to maintain the filtering stage.
3. The method according to claim 1, wherein after the step of entering the press stage from the filtration stage if the real-time accumulated filtrate mass is equal to or greater than the press start threshold, further comprising: increasing the squeezing pressure and synchronously monitoring the flow rate of the filtrate; If the flow rate of the filtrate is increased, the squeezing pressure is continuously increased so as to enable the squeezing pressure to reach an optimal pressure threshold value, and the optimal pressure threshold value is kept for squeezing.
4. A sludge solids-liquid separation method as claimed in claim 3 wherein after said step of increasing the press pressure and simultaneously monitoring the flow rate of the filtrate, further comprising: If the flow rate of the filtrate decreases, the increase of the press pressure is stopped.
5. The method according to claim 1, wherein after the step of entering the press stage from the filtration stage if the real-time accumulated filtrate mass is equal to or greater than the press start threshold, further comprising: and stopping the squeezing stage if the flow rate of the filtrate is smaller than a squeezing termination threshold.
6. The method for solid-liquid separation of sludge according to claim 1, wherein the press initiation threshold is dynamically adjusted according to the sludge solid concentration and the filtrate flow rate.
7. The solid-liquid separation method for the sludge is characterized by comprising the following steps of: obtaining the reduction rate of the flow rate of filtrate and the solid concentration of sludge; comparing the rate of decrease in the filtrate flow rate with a squeeze recognition threshold; If the decreasing rate of the filtrate flow rate is lower than the pressing termination threshold value, entering a pressing stage from a filtering stage; The filtering pressure of the filtering stage is a constant value, the squeezing pressure of the squeezing stage is dynamically adjusted according to the sludge solid concentration, and the squeezing pressure is larger than the filtering pressure.
8. A sludge solid-liquid separation system, comprising: the acquisition device is used for acquiring the real-time accumulated filtrate quality and the sludge solid concentration; The comparison device is used for comparing the real-time accumulated filtrate quality with a squeezing starting threshold; the judging device is used for entering the squeezing stage from the filtering stage if the real-time accumulated filtrate mass is larger than or equal to the squeezing starting threshold value; The filtering pressure of the filtering stage is a constant value, the squeezing pressure of the squeezing stage is dynamically adjusted according to the sludge solid concentration, and the squeezing pressure is larger than the filtering pressure.
9. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, carries out the steps of the sludge solid-liquid separation method according to any one of claims 1 to 7.
10. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, realizes the steps of the sludge solid-liquid separation method as claimed in any one of claims 1 to 7.

Description

Sludge solid-liquid separation method, system, computer equipment and storage medium Technical Field The invention belongs to the technical field of automatic control, and particularly relates to a sludge solid-liquid separation method, a system, computer equipment and a storage medium. Background In the industrial wastewater and municipal sewage treatment process, a large amount of sludge with extremely high water content can be generated. Related researches show that the water content of the sludge is generally up to about 97%, and the sludge has complex composition, fine particles, strong water retention and higher dehydration difficulty. At present, key operation parameters (such as filtering pressure, squeezing conversion time, squeezing pressure and the like) in the sludge press filtration dehydration process are set by manual experience, influence of fluctuation of sludge solid concentration on the dehydration process is not considered, and a dynamic regulation and control mechanism based on a real-time dehydration state is lacked. In practice, in order to achieve a lower water content of the cake, the filtration time tends to be excessively prolonged or the press pressure tends to be increased, resulting in an increase in energy consumption, thereby increasing the treatment cost. Disclosure of Invention The invention aims to provide a sludge solid-liquid separation method, a system, computer equipment and a storage medium, which are used for solving the technical problems that in the prior art, in order to pursue lower water content of a filter cake, the filtering time is often excessively prolonged or the squeezing pressure is increased, so that the energy consumption is increased, and the treatment cost is increased. In order to achieve the purpose, the invention adopts the technical scheme that the solid-liquid separation method for sludge comprises the following steps: Acquiring real-time accumulated filtrate quality and sludge solid concentration; comparing the real-time accumulated filtrate quality with a squeezing starting threshold; if the real-time accumulated filtrate mass is greater than or equal to the squeezing starting threshold, entering a squeezing stage from a filtering stage; The filtering pressure of the filtering stage is a constant value, the squeezing pressure of the squeezing stage is dynamically adjusted according to the sludge solid concentration, and the squeezing pressure is larger than the filtering pressure. Further, after the step of comparing the real-time accumulated filtrate quality data with a press start threshold, the method further includes: And if the real-time accumulated filtrate quality is smaller than the squeezing starting threshold, continuing to maintain the filtering stage. Further, after the step of entering the pressing stage from the filtering stage if the real-time accumulated filtrate mass is equal to or greater than the pressing start threshold, the method further includes: increasing the squeezing pressure and synchronously monitoring the flow rate of the filtrate; If the flow rate of the filtrate is increased, the squeezing pressure is continuously increased so as to enable the squeezing pressure to reach an optimal pressure threshold value, and the optimal pressure threshold value is kept for squeezing. Further, after the step of increasing the pressing pressure and synchronously monitoring the flow rate of the filtrate, the method further comprises: If the flow rate of the filtrate decreases, the increase of the press pressure is stopped. Further, after the step of entering the pressing stage from the filtering stage if the real-time accumulated filtrate mass is equal to or greater than the pressing start threshold, the method further includes: and stopping the squeezing stage if the flow rate of the filtrate is smaller than a squeezing termination threshold. Further, the squeezing start threshold is dynamically adjusted according to the sludge solids concentration and filtrate flow rate. Another object of the present invention is to provide a solid-liquid separation method of sludge, comprising the steps of: obtaining the reduction rate of the flow rate of filtrate and the solid concentration of sludge; comparing the rate of decrease in the filtrate flow rate with a squeeze recognition threshold; If the decreasing rate of the filtrate flow rate is lower than the squeezing recognition threshold, entering a squeezing stage from a filtering stage; The filtering pressure of the filtering stage is a constant value, the squeezing pressure of the squeezing stage is dynamically adjusted according to the sludge solid concentration, and the squeezing pressure is larger than the filtering pressure. Another object of the present invention is to provide a sludge solid-liquid separation system, comprising: the acquisition device is used for acquiring the real-time accumulated filtrate quality and the sludge solid concentration; The comparison device is used