Four-belt combined deep dehydrator system

Abstract

The utility model discloses a four-belt combined deep dehydrator system. The four-belt combined deep dehydrator system comprises a second-stage belt machine for squeezing and a first-stage belt machine for concentration and preliminary squeezing, the second-stage belt machine comprises a squeezing section for squeezing sludge and a mixing tank for mixing flocculated sludge medicine; the first-stage belt machine comprises a sludge receiving conveyor and a sludge mixing machine; the sludge receiving conveyor is connected with the mixing tank through a pipeline and is used for collecting sludge to be squeezed; the sludge mixer is connected with the sludge receiving conveyor through a pipeline, and is used for receiving the sludge conveyed by the sludge receiving conveyor and stirring and mixing the sludge; a material distributing machine is also arranged between the sludge mixing machine and the squeezing section and is used for uniformly distributing the sludge in the sludge mixing machine on the filter belt of the squeezing section. Original corollary equipment of the dehydrator can be utilized to the maximum extent for transformation, and transformation and extension of a dehydrator room are reduced while the water content of mud cakes is effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of sludge dewatering, and in particular to a four-belt combined deep dewatering machine system. Background Art

[0002] As of 2022, the scale of urban sewage treatment in my country exceeds 220 million cubic meters per day, and there are more than 5,500 urban sewage treatment plants. Many sewage treatment plants produce a large amount of sludge every day that needs to be concentrated and dehydrated. Among them, belt filter press is a solid-liquid separation equipment that is widely used. With the development of the times and the increasing requirements for environmental protection, many regions have mandatory requirements that the moisture content of sludge after dehydration must be less than 80%, 70% or 60%. As a water company, we also use multiple sets of belt filter presses as sludge dehydration equipment in our subordinate sewage treatment plants. At present, the moisture content of sludge after dehydration is about 80%. The annual sludge transportation and disposal costs have become one of the main production and operation costs. It is urgent to reduce the amount of sludge transportation to reduce operating costs.

[0003] At present, the commonly used technical solution for domestic renovation projects is: a two-stage pressing method of a primary belt filter press (original dehydrator) + a secondary high-pressure belt filter press (newly added). The main problem with this technical solution is the connection between the primary belt machine and the secondary belt machine. Conventional primary belt filter presses and secondary high-pressure belt filter presses are relatively large in size, and most dehydration rooms cannot accommodate them. New dehydration rooms need to be built, and conveying or sludge storage equipment needs to be added to connect the primary and secondary filter presses. Therefore, the renovation workload is large, the renovation period is long, many new equipment are needed, and the investment is high. Utility Model Content

[0004] In view of the problems that the existing two-stage pressing technical solutions generally have large transformation workload, long construction period, many new equipment and high investment, the utility model provides a 4-belt combined deep dehydrator system, which can maximize the use of original supporting equipment, effectively reduce the moisture content of mud cakes and reduce the transformation and expansion of dehydration room. The utility model is achieved through the following technical solutions.

[0005] A 4-belt combined deep dewatering machine system, characterized in that it includes: a secondary belt machine for pressing and a primary belt machine for concentrating and preliminary pressing; the secondary belt machine includes a pressing section for pressing sludge and a mixing tank for mixing flocculation sludge drugs; the primary belt machine includes a sludge collecting conveyor and a sludge mixer; the sludge collecting conveyor is connected to the mixing tank pipeline for collecting sludge to be pressed; the sludge mixer is connected to the sludge collecting conveyor pipeline for receiving the sludge conveyed by the sludge collecting conveyor and stirring and mixing the sludge; a distribution machine is also provided between the sludge mixer and the pressing section for evenly distributing the sludge in the sludge mixer on the filter belt of the pressing section.

[0006] The above-mentioned 4-belt combined deep dehydrator system is characterized in that the first-stage belt machine and the second-stage belt machine are of fully enclosed combined design.

[0007] The above-mentioned 4-belt combined deep dehydrator system is characterized in that a conditioning agent injection port is also provided in the sludge receiving conveyor for injecting agents into the sludge to be squeezed.

[0008] The utility model has the following beneficial effects by adopting the above technical solution:

[0009] The utility model optimizes the structure of the dehydrator according to the current situation of the dehydration room of most sewage treatment plants, utilizes the original dehydrator as the secondary dehydrator, adds a new type of low-pressure belt filter press and superimposes it on the original dehydrator as the primary dehydrator, forms a 4-belt combined deep dehydrator system, maximizes the use of the original supporting equipment, reduces the renovation and expansion of the user's dehydration room, and effectively reduces the moisture content of the mud cake. While meeting the needs of users, it can also reduce the user's renovation costs and shorten the user's equipment investment payback time. At the same time, considering that the whole machine can be fully enclosed, it is beneficial to the centralized collection and treatment of exhaust gas, which can be selected by users. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the working principle of the combined deep dehydrator system of Example 4 of the utility model.

[0011] Figure 2 This is a schematic diagram of the original structure of the existing DYAC belt filter press equipment in the embodiment of the utility model.

[0012] In the figure: 1. primary belt conveyor, 12. sludge collecting conveyor, 13. sludge mixer, 14. distributor, 2. secondary belt conveyor, 21. pressing section, 22. mixing tank. DETAILED DESCRIPTION

[0013] The present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0014] The utility model provides a 4-belt combined deep dehydrator system to solve the problems of large transformation workload, long construction period, many new equipments and high investment in the existing two-stage pressing technology solutions.

[0015] [Example 1]

[0016] The utility model system is a transformation plan for the existing stock equipment DYAC belt filter press. The original system is the existing stock equipment DYAC belt filter press, such as Figure 2 As shown, Figure 2This is a schematic diagram of the original structure of the existing DYAC belt filter press of the utility model embodiment. The filter press is mainly composed of a detachable pressing section 21 and a mixing tank 22. During the transformation, the pressing section 21 of the original system is used as the secondary belt machine 2 in the new system, and a new low-pressure belt filter press 1 is added as the primary belt machine. A sludge collecting conveyor 12, a sludge mixer 13 and a material distributor 14 are added. The mixing tank 22 in the original system is still used for mud-drug mixing and flocculation. The equipment combination method in the utility model system is shown in the schematic diagram of the transformation plan. Figure 1 As shown, Figure 1 This is a schematic diagram of the working principle of the combined deep dehydrator system of Example 4 of the utility model. The utility model system comprises: a secondary belt machine 2 for squeezing and a primary belt machine 1 for concentration and preliminary squeezing; the secondary belt machine 2 and the primary belt machine 1 are of fully enclosed combined design; the secondary belt machine 2 comprises a squeezing section 21 for squeezing sludge and a mixing tank 22 for mixing flocculation sludge drugs; the primary belt machine 1 comprises a sludge collecting conveyor 12 and a sludge mixer 13; the sludge collecting conveyor 12 is connected to the mixing tank 22 by a pipeline for collecting the sludge to be squeezed; the sludge collecting conveyor 12 is also provided with a conditioning agent addition port for adding agents to the sludge to be squeezed; the sludge mixer 13 is connected to the sludge collecting conveyor 12 by a pipeline for receiving the sludge conveyed by the sludge collecting conveyor 12 and stirring and mixing the sludge; a distributor 14 is also provided between the sludge mixer 13 and the squeezing section 21 for evenly distributing the sludge in the sludge mixer 13 on the filter belt of the squeezing section 21.

[0017] [Example 2]

[0018] like Figure 1 As shown, when the system is working, the sludge is firstly concentrated and squeezed in the primary belt machine 1. After the sludge is compressed to a mud cake that meets the subsequent use, the mud cake is discharged into the sludge collecting conveyor 12. The conditioning agent is added to the mud cake while it is collected together using the conditioning agent addition port of the sludge collecting conveyor 12. The collected mud cake mixed with the agent will fall into the sludge mixer 13, and the mud cake and the agent will be further stirred and mixed. The stirred and mixed mud cake is discharged into the distributor 14 installed on the original pressing section 21. After passing through the distributor 14, the mud cake is evenly distributed on the filter belt of the original pressing section 21, and finally the excess water is further removed through the secondary pressing and dehydration of the original pressing section 21.

[0019] The above is only a preferred embodiment of the present invention, but the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Any simple modification, equivalent changes and modifications made to the above embodiments by any technician familiar with the profession according to the technical essence of the present invention without departing from the principle and spirit of the present invention shall be included in the protection scope of the present invention.

Claims

1. A 4-belt combined deep dehydrator system, characterized in that: include: A secondary belt machine for squeezing and a primary belt machine for concentration and preliminary squeezing; the secondary belt machine includes a squeezing section for squeezing sludge and a mixing tank for mixing flocculation sludge drugs; the primary belt machine includes a sludge receiving conveyor and a sludge mixer; the sludge receiving conveyor is connected to the mixing tank pipeline and is used to collect the sludge to be squeezed; the sludge mixer is connected to the sludge receiving conveyor pipeline and is used to receive the sludge conveyed by the sludge receiving conveyor and stir and mix the sludge; A distributor is also provided between the sludge mixer and the pressing section for evenly distributing the sludge in the sludge mixer onto the filter belt of the pressing section.

2. The 4-belt combined deep dehydrator system according to claim 1, characterized in that: The primary belt machine and the secondary belt machine are of fully enclosed combined design.

3. The 4-belt combined deep dehydrator system according to claim 1, characterized in that: The sludge receiving conveyor is also provided with a conditioning agent adding port for adding agents to the sludge to be squeezed.

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