Backwashing flotation oil collecting device of walnut shell filter

Abstract

The utility model discloses a backwashing flotation oil collecting device of a walnut shell filter. The tail end of a first pipeline is connected with the lower part of a walnut shell filter to be backwashed; the backwashing pump is connected with the starting end of the first pipeline; the starting end of the nitrogen pipeline is connected with a nitrogen station, and the tail end is connected with the front part of the first pipeline; a cleaning agent injection pump is connected with the middle part of the first pipeline through a cleaning agent injection pipeline; the dirty oil tank is arranged on one side of the walnut shell filter to be backwashed and is connected with the top of the walnut shell filter to be backwashed through an oil collecting pipeline; the sewage tank is arranged on one side of the walnut shell filter to be backwashed and is positioned below the dirty oil tank; the sewage tank is connected with the upper part of the walnut shell filter to be backwashed through a sewage pipe; and the filtering outlet pipe is arranged at the bottom of the walnut shell filter to be backwashed. The walnut shell filter has the beneficial effects that backwashing, flotation and oil collection can be carried out on the walnut shell filter.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, and in particular to a walnut shell filter backwashing flotation oil recovery device. Background Technology

[0002] In wastewater treatment processes within the petroleum and petrochemical industry, walnut shell filters typically serve as the final stage of treatment, ultimately determining whether the effluent quality meets standards. Factors affecting the effluent quality of walnut shell filters are complex, including the concentration of pollutants in the upstream feed, the filter's operating time, and the degree of media contamination. During routine operation, backwashing is necessary based on the filter's operating time and differential pressure conditions to restore its filtration capacity.

[0003] The aforementioned and existing related technologies have the following drawbacks: 1. When the feed water quality of the walnut shell filter in the sewage treatment process far exceeds its treatment capacity, the walnut shell filter media cannot restore its filtration capacity through conventional water backwashing. Long-term retention of pollutants in the filter media layer causes caking, leading to a sharp decline in the filtration capacity of the walnut shell filter; 2. When backwashing with a high-efficiency cleaning agent after severe contamination of the walnut shell filter media, the short action time of the agent during backwashing not only fails to fully exert its efficacy but also results in waste of the high-efficiency cleaning agent; 3. The backwash water after backwashing with the high-efficiency cleaning agent is a micelle containing high concentrations of the agent, suspended solids, and emulsified oil. After passing through the sewage tank for buffering and sedimentation... Subsequently, a micelle "intermediate layer" accumulates in the wastewater tank over a long period. This micelle "intermediate layer" is difficult to treat after entering the first-stage inclined plate oil separator of the production water treatment system, thus causing the water quality along the entire production water system to fail to meet standards. This repeated cycle leads to a rapid deterioration in the quality of both the production water and the injection water system. 4. After dissolved air backwashing, some dissolved gas remains in the walnut shell filter tank and backwash pipeline. After the walnut shell filter is put into operation, this gas accumulates at the top of the tank. During the oil recovery process, this gas is discharged all at once into the atmospheric pressure sludge tank, causing high pressure in the sludge tank, resulting in equipment shutdown. This gas also affects the oil recovery efficiency of the walnut shell filter. Therefore, to address the above problems, a walnut shell filter backwashing flotation oil recovery device is proposed. Utility Model Content

[0004] The purpose of this utility model is to provide a walnut shell filter backwashing flotation oil recovery device, which is equipped with a first pipeline, a backwashing pump, a nitrogen pipeline, a cleaning agent injection pump, a sludge oil tank, a sewage tank and a filter outlet pipe, and can perform backwashing, flotation and oil recovery on the walnut shell filter.

[0005] To achieve the above objectives, the present invention adopts the following technical solution, including:

[0006] The first pipeline is connected at its end to the lower part of the walnut shell filter to be backwashed;

[0007] A backwash pump, which is connected to the starting end of the first pipeline, is used to supply backwash water into the first pipeline;

[0008] A nitrogen pipeline, whose starting end is connected to a nitrogen station and whose ending end is connected to the front of the first pipeline, is used to inject nitrogen into the first pipeline and mix it with backwash water to form dissolved air water.

[0009] A cleaning agent injection pump is connected to the middle of the first pipeline via a cleaning agent injection line, and is used to inject cleaning agent into the first pipeline;

[0010] The sludge tank is located on one side of the walnut shell filter to be backwashed and is connected to the top of the walnut shell filter to be backwashed via an oil collection pipeline.

[0011] A wastewater tank is located on one side of the walnut shell filter to be backwashed and below the sludge tank; the wastewater tank is connected to the upper part of the walnut shell filter to be backwashed via a wastewater pipe.

[0012] The filter outlet pipe is located at the bottom of the walnut shell filter to be backwashed, and is used to inject production water into the walnut shell filter to be backwashed, which enters from the bottom of the tank to displace the floating oil on top.

[0013] Preferably, the nitrogen pipeline is provided with an electromagnetic shut-off valve, a flow regulating valve, and a nitrogen flow meter in sequence from the starting end to the end.

[0014] Preferably, a backwash water flow meter is provided at the rear of the first pipeline.

[0015] Preferably, a chemical flow meter is provided on the cleaning agent injection line.

[0016] Preferably, an oil collection KV valve is provided on the oil collection pipeline.

[0017] Preferably, a filter outlet KV valve is provided on the filter outlet pipe.

[0018] Preferably, a connecting pipe is provided between the oil collection pipe and the sewage pipe, and a connecting valve is provided on the connecting pipe.

[0019] Preferably, it also includes a PLC controller, which is electrically connected to the backwash pump, the cleaning agent injection pump, the solenoid shut-off valve, the oil recovery KV valve and the filter outlet KV valve respectively, for controlling the backwash pump, the cleaning agent injection pump, the solenoid shut-off valve, the oil recovery KV valve and the filter outlet KV valve.

[0020] Preferably, it also includes a sampling window, which is disposed on the first pipeline and located between the nitrogen pipeline and the cleaning agent injection pipeline, for observing the state of dissolved water in the first pipeline.

[0021] The beneficial effects of this utility model are: it is equipped with a first pipeline, a backwash pump, a nitrogen pipeline, a cleaning agent injection pump, a sludge tank, a sewage tank, and a filter outlet pipe, which can perform backwashing, flotation, and oil collection on the walnut shell filter. Attached Figure Description

[0022] Figure 1 This is a perspective view of a walnut shell filter backwashing flotation oil collection device according to the present invention. Detailed Implementation

[0023] The utility model will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0024] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0025] like Figure 1 As shown, the present invention provides a walnut shell filter backwashing flotation oil collection device 1, comprising:

[0026] The first pipeline 111 is connected at its end to the lower part of the walnut shell filter 2 to be backwashed;

[0027] A backwash pump 112 is connected to the starting end of the first pipeline 111 and is used to supply backwash water into the first pipeline 111.

[0028] Nitrogen pipeline 120, whose starting end is connected to nitrogen station 121 and whose ending end is connected to the front of the first pipeline 111, is used to inject nitrogen into the first pipeline 111 and mix it with backwash water to form dissolved air water.

[0029] A cleaning agent injection pump 131 is connected to the middle of the first pipeline 132 via a cleaning agent injection line 132, and is used to inject cleaning agent into the first pipeline 111.

[0030] Oily waste tank 141 is located on one side of the walnut shell filter 2 to be backwashed and is connected to the top of the walnut shell filter 2 to be backwashed via an oil collection pipe 142.

[0031] Wastewater tank 151 is disposed on one side of the walnut shell filter 2 to be backwashed and located below the sludge tank 141; the wastewater tank 151 is connected to the upper part of the walnut shell filter to be backwashed via wastewater pipe 152.

[0032] The filter outlet pipe 161 is located at the bottom of the walnut shell filter to be backwashed and is used to inject production water into the walnut shell filter to be backwashed, which enters from the bottom of the tank to displace the floating oil on top.

[0033] In another embodiment, an electromagnetic shut-off valve 122, a flow regulating valve 123, and a nitrogen flow meter 124 are sequentially provided on the nitrogen pipeline 120 from the starting end to the end.

[0034] In another embodiment, a backwash water flow meter 113 is provided at the rear of the first pipeline 111.

[0035] In another embodiment, a drug flow meter 133 is provided on the cleaning agent injection line 132.

[0036] In another embodiment, an oil recovery KV valve 143 is provided on the oil recovery pipeline 142.

[0037] In another embodiment, a filter outlet KV valve 162 is provided on the filter outlet pipe 161.

[0038] In another embodiment, a connecting pipe 171 is provided between the oil collection pipe and the sewage pipe, and a connecting valve 172 is provided on the connecting pipe.

[0039] In another embodiment, a PLC controller is also included, which is electrically connected to the backwash pump 112, the cleaning agent injection pump 131, the solenoid shut-off valve 122, the oil recovery KV valve 143, and the filter outlet KV valve 162, respectively, for controlling the backwash pump 112, the cleaning agent injection pump 131, the solenoid shut-off valve 122, the oil recovery KV valve 143, and the filter outlet KV valve 162.

[0040] In another embodiment, it further includes a sampling window 114, which is disposed on the first pipeline 111 and located between the nitrogen pipeline and the cleaning agent injection pipeline, for observing the state of dissolved water in the first pipeline 111.

[0041] When the walnut shell filter needs enhanced backwashing to restore its filtration capacity, the PLC controller opens the electromagnetic shut-off valve 122 and the oil collection KV valve 143 to activate the air flotation function. This floats the oily residue and suspended solids deposited on the filter layer to the top of the tank. Then, the filter outlet KV valve 162 is opened, allowing treated production water to enter from the bottom of the tank and displace the floating oil at the top, achieving deep oil collection. After oil collection, the backwashing process begins. The PLC controller starts the backwash pump 112, electromagnetic shut-off valve 122, and cleaning agent injection pump 131. The effect of the dissolved air-water dispersion agent is observed through the sampling window 7. The connecting valve 172 is opened to guide the backwash effluent into the wastewater tank 151, completing the backwashing process. After the backwashing process is complete, the PLC control module opens the oil collection KV valve 143 to discharge the gas accumulated at the top of the tank into the oily residue tank 141, achieving flotation.

[0042] In summary, this utility model provides a walnut shell filter backwashing flotation oil recovery device, which includes a first pipeline, a backwashing pump, a nitrogen pipeline, a cleaning agent injection pump, a sludge tank, a wastewater tank, and a filter outlet pipe, and is capable of backwashing, flotation, and oil recovery of walnut shell filters.

[0043] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A walnut shell filter backwash floatation oil recovery device characterized by, include: The first pipeline is connected at its end to the lower part of the walnut shell filter to be backwashed; A backwash pump, which is connected to the starting end of the first pipeline, is used to supply backwash water into the first pipeline; A nitrogen pipeline, whose starting end is connected to a nitrogen station and whose ending end is connected to the front of the first pipeline, is used to inject nitrogen into the first pipeline and mix it with backwash water to form dissolved air water. A cleaning agent injection pump is connected to the middle of the first pipeline via a cleaning agent injection line, and is used to inject cleaning agent into the first pipeline; The sludge tank is located on one side of the walnut shell filter to be backwashed and is connected to the top of the walnut shell filter to be backwashed via an oil collection pipeline. A wastewater tank is located on one side of the walnut shell filter to be backwashed and below the sludge tank; the wastewater tank is connected to the upper part of the walnut shell filter to be backwashed via a wastewater pipe. The filter outlet pipe is located at the bottom of the walnut shell filter to be backwashed, and is used to inject production water into the walnut shell filter to be backwashed, which enters from the bottom of the tank to displace the floating oil on top.

2. The walnut shell filter backwash froth flotation oil recovery apparatus of claim 1, wherein: The nitrogen pipeline is equipped with an electromagnetic shut-off valve, a flow regulating valve, and a nitrogen flow meter in sequence from the starting end to the end.

3. The walnut shell filter backwash floatation oil recovery apparatus of claim 2, wherein: A backwash water flow meter is installed at the rear of the first pipeline.

4. The walnut shell filter backwash floatation oil recovery apparatus of claim 3, wherein: A flow meter is installed on the cleaning agent injection pipeline.

5. The walnut shell filter backwash floatation oil recovery apparatus of claim 4, wherein: An oil recovery KV valve is installed on the oil recovery pipeline.

6. The walnut shell filter backwashing flotation oil collection device according to claim 5, characterized in that: A filter outlet KV valve is installed on the filter outlet pipe.

7. The walnut shell filter backwash floatation oil recovery apparatus of claim 6, wherein: A connecting pipe is provided between the oil collection pipeline and the sewage pipeline, and a connecting valve is provided on the connecting pipe.

8. The walnut shell filter backwash floatation oil recovery apparatus of claim 7, wherein, Also includes: The PLC controller is electrically connected to the backwash pump, the cleaning agent injection pump, the solenoid shut-off valve, the oil recovery KV valve, and the filter outlet KV valve, respectively, and is used to control the backwash pump, the cleaning agent injection pump, the solenoid shut-off valve, the oil recovery KV valve, and the filter outlet KV valve.

9. The walnut shell filter backwash floatation oil recovery apparatus of claim 1, wherein, Also includes: A sampling window is set on the first pipeline and located between the nitrogen pipeline and the cleaning agent injection pipeline, for observing the state of dissolved water in the first pipeline.

Images