Detection interlocking system for off-machine water system under papermaking mesh

Abstract

The utility model relates to the technical field of papermaking white water treatment, and discloses a detection interlocking system for a white water system under a papermaking mesh, which comprises a DCS (Distributed Control System) papermaking system, a papermaking module and a filtering module for filtering white water generated by the papermaking module, and is characterized in that the white water filtered by the filtering module enters a white water tank; the interior of the white water pool is communicated with a retention aid tank through a pipeline, a flow valve is arranged on the pipeline between the retention aid tank and the white water pool, and a stirring assembly is arranged in the middle of the white water pool; a concentration monitoring assembly is arranged in the white water tank, and the white water tank is communicated with a white water purification tank through a drainage pump. According to the utility model, the concentration of white water under a papermaking mesh can be detected and is synchronously fed back to a papermaking DCS (Distributed Control System), so that the addition amount of a retention aid is controlled to ensure that the concentration of the white water and the addition amount of the retention aid are in an optimal state.

Description

Technical Field

[0001] The utility model relates to the technical field of papermaking white water treatment, in particular to a detection and interlock system for the white water system under the papermaking net. Background Technique

[0002] In the field of papermaking, white water refers to the wastewater containing a large amount of fibers, fillers and dissolved substances flowing from the wire part and press part of the papermaking machine during the production process of the papermaking machine. White water is the part with the largest water consumption in the pulp and paper making process, which contains about 3% - 10% of fine fibers, fillers, ink particles and dissolved wood extracts, and contains various chemical additives added during the papermaking process.

[0003] In the actual production process, in order to make the white water concentration generated in the papermaking module reach the required discharge concentration, after filtering the white water discharged from the papermaking net, a retention aid is usually added thereto for adsorption to reduce the white water concentration to meet the discharge requirements. However, in the prior art, there is a lack of a white water detection and linkage system for detecting the white water concentration, synchronously feeding it back to the papermaking DCS system, and then controlling the amount of the retention aid added to ensure that the white water concentration and the amount of the retention aid added are in an optimal state. Summary of the Utility Model

[0004] (I) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the utility model provides a detection and interlock system for the white water system under the papermaking net, which solves the problems that it is inconvenient to adjust the amount of the retention aid added in real time according to the white water concentration during the treatment of the white water under the papermaking net in the prior art, resulting in waste of the retention aid and the inconsistency between the white water concentration and the required concentration.

[0006] (II) Technical Solutions

[0007] To achieve the above purposes, the utility model is realized through the following technical solutions:

[0008] The detection and interlock system for the white water system under the papermaking net includes a DCS papermaking system, a papermaking module and a filtering module for filtering the white water generated by the papermaking module. The white water filtered by the filtering module enters the white water tank. A retention aid tank is connected to the white water tank through a pipeline. A flow valve is arranged on the pipeline between the retention aid tank and the white water tank. A stirring component is arranged in the middle of the white water tank. A concentration monitoring component is arranged in the white water tank. The white water tank is connected to a white water purification tank through a drainage pump.

[0009] Preferably, a liquid level sensor is arranged on the cavity wall of the white water tank, and the liquid level sensor is electrically connected to the DCS papermaking system.

[0010] Preferably, it further includes a PAC adding device, which is electrically connected to the DCS papermaking system. The PAC adding device includes a PAC adding device and two detection probes. The two detection probes are arranged in the inner cavity of the white water tank to detect the charge value and conductivity value of the white water, and feedback them to the DCS papermaking system.

[0011] Preferably, the bottom of the white water tank is connected to a sludge discharge pump through a pipeline. The pipeline connected to the drainage pump extends into the inner cavity of the white water tank, and the pipeline port is higher than the sediment layer after standing still.

[0012] Preferably, a purifying agent dosing device is arranged above the white water purification tank. The white water purified by the white water purification tank is uniformly collected into a collection tank.

[0013] (III) Beneficial effects

[0014] The present utility model has the following beneficial effects:

[0015] For the white water system detection and interlock system under the papermaking wire, through the arranged concentration monitoring component and flow valve, after the papermaking pulp is formed through the wire section of the workshop, the white water filtered down still has a certain concentration after being adsorbed by the retention aid. At this time, it is fed back to the DCS papermaking system through the concentration monitoring component, and the system will adjust the addition amount of the retention aid tank according to the concentration size to make the white water concentration reach the required standard, so that the white water concentration and the addition amount of the retention aid are in an optimal state, effectively saving the cost of white water treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the present utility model.

[0017] In the figure: 1. DCS papermaking system; 2. Retention aid tank; 3. Flow valve; 4. White water tank; 5. Concentration monitoring component; 6. Liquid level sensor; 7. Stirring component; 8. PAC adding device; 9. Sludge discharge pump; 10. Drainage pump; 11. White water purification tank; 12. Purifying agent dosing device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0019] Please refer to Figure 1, the present utility model provides a technical solution: a detection and interlock system for the white water system under the papermaking wire, including a DCS papermaking system 1, a papermaking module, and a filtering module for filtering the white water generated by the papermaking module. The white water filtered by the filtering module enters a white water tank 4. A retention aid tank 2 is connected to the white water tank 4 through a pipeline. A flow valve 3 is arranged on the pipeline between the retention aid tank 2 and the white water tank 4. A stirring assembly 7 is arranged in the middle of the white water tank 4; a concentration monitoring assembly 5 is arranged in the white water tank 4, and the white water tank 4 is connected to a white water purification tank 11 through a drainage pump 10.

[0020] In the present utility model, through the arranged concentration monitoring assembly 5 and flow valve 3, after the papermaking pulp is formed through the wire section in the workshop, the filtered white water still has a certain concentration after being adsorbed by the retention aid. At this time, it is fed back to the DCS papermaking system 1 through the concentration monitoring assembly 5. The system will adjust the addition amount of the retention aid tank 2 according to the concentration to make the white water concentration reach the required standard, so that the white water concentration and the retention aid addition amount are in an optimal state, effectively saving the cost of white water treatment.

[0021] In this embodiment, a liquid level sensor 6 is arranged on the cavity wall of the white water tank 4, and the liquid level sensor 6 is electrically connected to the DCS papermaking system 1. By arranging the liquid level sensor 6 in the inner cavity of the white water tank 4, the liquid level of the white water tank 4 can be monitored and then fed back to the DCS papermaking system 1 to control the opening and closing of the flow valve 3 between the filtering module and the white water tank 4 or to perform flow control, so as to ensure the normal treatment of the white water in the white water tank 4.

[0022] In this embodiment, it further includes a PAC adding device 8. The PAC adding device is electrically connected to the DCS papermaking system 1. The PAC adding device 8 includes a PAC adding device and two detection probes. The two detection probes are arranged in the inner cavity of the white water tank 4 and are used to detect the charge value and conductivity value of the white water and feed them back to the DCS papermaking system 1. The detection probes detect the charge value and conductivity value of the white water and input them into the DCS papermaking system 1 through a circuit. The DCS papermaking system 1 compares the set value and then feeds back to the PAC adding device to control the PAC adding device to add PAC into the white water tank 4 to reduce the charge and conductivity value of the white water to meet the treatment requirements. PAC is polyaluminum chloride, also known as basic aluminum chloride, with the code PAC. It is usually also called a water purification agent or a coagulant.

[0023] In this embodiment, the bottom of the white water tank 4 is connected to a sludge pump 9 through a pipeline, and the pipeline connected to the drain pump 10 extends into the inner cavity of the white water tank 4 and the pipeline port is higher than the sediment layer after standing. When a certain amount of PAC is put into the white water tank 4, after a period of time, sediment and supernatant appear in the white water tank 4. The supernatant in the white water tank 4 can be discharged into the white water purification tank 11 through the drain pump 10 for purification treatment; at the same time, the sludge pump 9 can be used to further and thoroughly discharge the sediment and part of the white water in the white water tank 4, and then the white water tank 4 can be further cleaned.

[0024] In this embodiment, a purifying agent feeding device 12 is arranged above the white water purification tank 11, and the white water purified by the white water purification tank 11 is uniformly collected into a collection tank. The white water obtained after being purified by putting a purifying agent into the white water purification tank 11 is uniformly collected into the collection tank, so as to be reused after further treatment.

[0025] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation. An element defined by the statement "including a..." does not exclude the presence of additional identical elements in the process, method, article or device including the element.

[0026] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The detection interlocking system of the white water system under the papermaking net includes a DCS papermaking system, a papermaking module and a filtering module for filtering the white water generated by the papermaking module, and is characterized by: The white water filtered by the filtration module enters the white water pool, the white water pool is connected to a retention agent tank through a pipeline, a flow valve is arranged on the pipeline between the retention agent tank and the white water pool, a stirring component is arranged in the middle of the white water pool; a concentration monitoring component is arranged in the white water pool, and the white water pool is connected to a white water purification tank through a drainage pump.

2. The detection interlocking system for the white water system under the papermaking wire according to claim 1 is characterized by: A liquid level sensor is arranged on the cavity wall of the white water pool, and the liquid level sensor is electrically connected to the DCS papermaking system.

3. The detection interlocking system for the white water system under the papermaking wire according to claim 2 is characterized by: It also includes a PAC adding device, which is electrically connected to the DCS papermaking system. The PAC adding device includes a PAC adding device and two detection probes. The two detection probes are arranged in the inner cavity of the white water pool and are used to detect the charge value and conductivity value of the white water, and feed back to the DCS papermaking system.

4. The detection interlocking system for the white water system under the papermaking wire according to claim 3 is characterized by: The bottom of the white water pool is connected to a mud pump through a pipeline, and the pipeline connected to the drainage pump extends into the inner cavity of the white water pool and the pipeline port is higher than the sedimentation layer after standing.

5. The detection interlocking system for the white water system under the papermaking wire according to claim 1 or 3, characterized in that: A purifier delivery device is arranged above the white water purification tank, and the white water purified by the white water purification tank is uniformly collected in a collection tank.

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