Sludge blending device for sewage reaction tank

Abstract

The utility model relates to the technical field of sewage treatment, in particular to a sludge blending device for sewage reaction tanks, which comprises a buffer tank, a first sewage reaction tank, a second sewage reaction tank, a third sewage reaction tank and a fourth sewage reaction tank. Outlets of the reaction tanks are fixedly communicated with sludge conveying pipelines respectively, sludge conveying pumps are fixedly mounted on the sludge conveying pipelines, sludge communicating pipelines are fixedly communicated among the sludge conveying pipelines, and the sludge conveying pipelines and the sludge communicating pipelines are fixedly provided with switch valves. The sludge mixing device is reasonable and compact in structure and convenient to use, achieves the purpose of mutual mixing of sludge in the independent sewage reaction tanks by controlling the switch valves, reduces the risk of output reduction caused by sludge domestication, and has the characteristics of safety, labor saving, simplicity, convenience and high efficiency.

Description

Sewage reaction tank sludge preparation device Technical Field

[0001] This utility model relates to the field of wastewater treatment technology and is a sludge preparation device for a wastewater reaction tank. Background Technology

[0002] Currently, the treatment methods for urban and industrial wastewater can generally be categorized into physical, chemical, and biological methods. Among these, biological methods for wastewater treatment are numerous, including SBR, A / O, A / A / O, and oxidation ditches. These methods all use activated sludge as the treatment carrier, with microorganisms attaching to the sludge for survival. During their growth and reproduction, the microorganisms absorb carbon, nitrogen, and phosphorus sources from the wastewater as food, transforming organic matter into inorganic matter through their own processes, thus achieving compliant wastewater discharge. SBR, short for Sequencing Batch Reactor, is an activated sludge wastewater treatment technology that operates on an intermittent aeration basis. Its main characteristic is its ordered and intermittent operation. The core of SBR technology is the SBR reactor, which integrates equalization, primary sedimentation, biodegradation, and secondary sedimentation functions into one tank, without a sludge return system. It is particularly suitable for situations with limited construction space, intermittent discharge, and large flow variations, and has been widely used in China.

[0003] In actual production, SBR reactors are typically designed with multiple independent reactors, each operating at a different stage. If, at a certain time, the concentration of wastewater entering the SBR reactor exceeds the standard, one or more reactors may receive high-concentration wastewater during this period. This impacts the sludge, inhibits microbial growth, and reduces the treatment capacity of these reactors. The apparent symptoms include decreased sludge settling properties, increased foaming, and sludge diffusion. The fundamental solution to these problems is to re-cultivate the sludge. The usual practice is to purchase new activated sludge and add it to the impacted reactors for acclimatization and cultivation. This process takes at least 3 to 6 weeks. During this acclimatization and cultivation phase, a large amount of wastewater cannot be treated, significantly impacting production. Furthermore, purchasing and adding new sludge requires manpower and machinery, increasing costs.

[0004] Therefore, it is essential to research and invent a sludge preparation device for wastewater reaction tanks. Summary of the Invention

[0005] This utility model provides a sludge preparation device for a wastewater reaction tank, which overcomes the shortcomings of the prior art and can effectively solve the problems of long acclimatization period and high sludge replacement cost after sludge is impacted in the existing wastewater treatment process.

[0006] The technical solution of this utility model is achieved through the following measures: a sludge preparation device for a wastewater reaction tank, comprising a buffer tank, a first wastewater reaction tank, and a second wastewater reaction tank, wherein a first wastewater conveying pipeline is fixedly connected between the bottom outlet of the buffer tank and the inlet of the first wastewater reaction tank, a second wastewater conveying pipeline is fixedly connected between the first wastewater conveying pipeline and the inlet of the second wastewater reaction tank, a first sludge conveying pipeline is fixedly connected to the outlet of the first wastewater reaction tank, a second sludge conveying pipeline is fixedly connected to the outlet of the second wastewater reaction tank and the first sludge conveying pipeline, a first sludge connecting pipeline is fixedly connected to the first sludge conveying pipeline between the inlet of the first sludge conveying pipeline and the second sludge conveying pipeline, and a second sludge connecting pipeline is fixedly connected to the second sludge conveying pipeline between the inlet of the second sludge conveying pipeline and the outlet of the second sludge conveying pipeline.

[0007] The following are further optimizations and / or improvements to the above-mentioned utility model technical solution:

[0008] A first sludge conveying pump and a second sludge conveying pump are fixedly installed on the first sludge conveying pipeline between the inlet and outlet of the first sludge connecting pipeline and on the second sludge conveying pipeline between the inlet and outlet of the second sludge connecting pipeline, respectively.

[0009] The above also includes a third wastewater reaction tank and a fourth wastewater reaction tank. A third wastewater transmission pipeline is fixedly connected between the second wastewater transmission pipeline and the inlet of the third wastewater reaction tank. A fourth wastewater transmission pipeline is fixedly connected between the second wastewater transmission pipeline between the third wastewater transmission pipeline and the second wastewater reaction tank and the inlet of the fourth wastewater reaction tank. A third sludge transmission pipeline is fixedly connected between the bottom outlet of the third wastewater reaction tank and the first sludge transmission pipeline between the outlet of the first sludge transmission pump and the first sludge connecting pipeline. A fourth sludge transmission pipeline is fixedly connected between the bottom outlet of the fourth wastewater reaction tank and the second sludge transmission pipeline between the outlet of the second sludge transmission pump and the second sludge connecting pipeline.

[0010] The third sludge conveying pipeline and the fourth sludge conveying pipeline are respectively fixedly installed with a third sludge conveying pump and a fourth sludge conveying pump.

[0011] The inlet of the third sludge conveying pipeline is fixedly connected to the inlet of the first sludge conveying pipeline between the third sludge conveying pipeline and the first sludge connecting pipeline. The inlet of the fourth sludge conveying pipeline is fixedly connected to the first sludge conveying pipeline between the first sludge connecting pipeline and the second sludge conveying pipeline.

[0012] The aforementioned first sludge connecting pipeline, the first sludge conveying pipeline between the first sludge connecting pipeline and the inlet of the first sludge conveying pump, the first sludge conveying pipeline between the first sludge conveying pump and the third sludge conveying pipeline, the first sludge conveying pipeline between the third sludge conveying pipeline and the third sludge connecting pipeline, the third sludge conveying pipeline between the first sludge conveying pipeline and the outlet of the third sludge conveying pump, the third sludge conveying pipeline between the inlet of the third sludge conveying pump and the third sludge connecting pipeline, the third sludge connecting pipeline, the fourth sludge connecting pipeline, the fourth sludge conveying pipeline between the fourth sludge connecting pipeline and the inlet of the fourth sludge conveying pump, the fourth sludge conveying pipeline between the outlet of the fourth sludge conveying pump and the second sludge conveying pipeline, and the fourth sludge conveying... The second sludge conveying pipeline between the second sludge conveying pipeline and the second sludge connecting pipeline, the second sludge conveying pipeline between the fourth sludge conveying pipeline and the outlet of the second sludge conveying pump, the second sludge conveying pipeline between the inlet of the second sludge conveying pump and the second sludge connecting pipeline, the second sludge connecting pipeline, and the first sludge conveying pipeline between the outlet of the second sludge conveying pipeline and the outlet of the first sludge conveying pipeline are respectively equipped with a first switch valve, a second switch valve, a third switch valve, a fourth switch valve, a fifth switch valve, a sixth switch valve, a seventh switch valve, an eighth switch valve, a ninth switch valve, a tenth switch valve, an eleventh switch valve, a twelfth switch valve, a thirteenth switch valve, a fourteenth switch valve, and a fifteenth switch valve.

[0013] This utility model has a reasonable and compact structure and is easy to use. It has a fixed sludge connecting pipeline between sludge conveying pipelines. Both the sludge conveying pipeline and the sludge connecting pipeline are equipped with fixed switch valves. By controlling the switch valves, the purpose of mutual adjustment of sludge between independent sewage reaction tanks can be achieved, reducing the risk of production reduction due to sludge acclimation. At the same time, after sludge adjustment, sludge discharge, sludge pressing volume and sludge flocculant dosage are reduced, saving treatment costs. Attached Figure Description

[0014] Figure 1 is a schematic diagram of the process flow of this utility model.

[0015] The codes in Figure 1 are as follows: 1 for buffer tank, 2 for first wastewater reaction tank, 3 for second wastewater reaction tank, 4 for first wastewater conveying pipeline, 5 for second wastewater conveying pipeline, 6 for first sludge conveying pipeline, 7 for second sludge conveying pipeline, 8 for first sludge connecting pipeline, 9 for second sludge connecting pipeline, 10 for first sludge conveying pump, 11 for second sludge conveying pump, 12 for third wastewater reaction tank, 13 for fourth wastewater reaction tank, 14 for third wastewater conveying pipeline, 15 for fourth wastewater conveying pipeline, 16 for third sludge conveying pipeline, 17 for fourth sludge conveying pipeline, and 18 for... 19 is the third sludge transfer pump, 20 is the third sludge connecting pipeline, 21 is the fourth sludge connecting pipeline, 22 is the first switch valve, 23 is the second switch valve, 24 is the third switch valve, 25 is the fourth switch valve, 26 is the fifth switch valve, 27 is the sixth switch valve, 28 is the seventh switch valve, 29 is the eighth switch valve, 30 is the ninth switch valve, 31 is the tenth switch valve, 32 is the eleventh switch valve, 33 is the twelfth switch valve, 34 is the thirteenth switch valve, 35 is the fourteenth switch valve, and 36 is the fifteenth switch valve. Detailed Implementation

[0016] This utility model is not limited to the following embodiments, and the specific implementation method can be determined according to the technical solution of this utility model and the actual situation.

[0017] Unless otherwise specified, all equipment and devices used in this invention are existing, publicly known, and commonly used equipment and devices in the field.

[0018] In this utility model, for ease of description, the relative positional relationships of each component are described according to the layout of Figure 1 in the specification. For example, the positional relationships of front, back, top, bottom, left, right, etc. are determined according to the layout direction of Figure 1 in the specification.

[0019] The present invention will be further described below with reference to the embodiments and accompanying drawings:

[0020] Example 1: As shown in Figure 1, the sludge preparation device for the wastewater reaction tank includes a buffer tank 1, a first wastewater reaction tank 2, and a second wastewater reaction tank 3. A first wastewater conveying pipeline 4 is fixedly connected between the bottom outlet of the buffer tank 1 and the inlet of the first wastewater reaction tank 2. A second wastewater conveying pipeline 5 is fixedly connected between the first wastewater conveying pipeline 4 and the inlet of the second wastewater reaction tank 3. A first sludge conveying pipeline 6 is fixedly connected to the outlet of the first wastewater reaction tank 2. A second sludge conveying pipeline 7 is fixedly connected between the outlet of the second wastewater reaction tank 3 and the first sludge conveying pipeline 6. A first sludge connecting pipeline 8 is fixedly connected to the first sludge conveying pipeline 6 between the inlet of the first sludge conveying pipeline 6 and the second sludge conveying pipeline 7. A second sludge connecting pipeline 9 is fixedly connected to the second sludge conveying pipeline 7 between the inlet of the second sludge conveying pipeline 7 and the outlet of the second sludge conveying pipeline 7.

[0021] In this invention, the wastewater to be treated comes from industrial wastewater and domestic sewage from the production area. After being mixed and homogenized in buffer tank 1, the wastewater enters the first wastewater reaction tank 2 and the second wastewater reaction tank 3 respectively. In the first wastewater reaction tank 2 and the second wastewater reaction tank 3, the wastewater to be treated undergoes homogenization again, primary sedimentation, biodegradation, and secondary sedimentation. After being treated to meet the standards, it is discharged or reused.

[0022] When the test indicators of the wastewater to be treated exceed the standards (mainly chemical oxygen demand ≥500mg / L and ammonia nitrogen ≥500mg / L), after the wastewater enters the first wastewater reaction tank 2 or the second wastewater reaction tank 3, the sludge in the first wastewater reaction tank 2 or the second wastewater reaction tank 3 is impacted, which reduces the treatment capacity of the first wastewater reaction tank 2 or the second wastewater reaction tank 3. At this time, through the first sludge connecting pipeline 8 or the second sludge connecting pipeline 9, the sludge that has not been impacted is mixed with the sludge that has been impacted, so as to reduce sludge discharge, shorten the sludge acclimation time, and save treatment costs.

[0023] The above-mentioned sludge preparation device for the wastewater reaction tank can be further optimized and / or improved according to actual needs:

[0024] Example 2: The difference between Example 1 and Example 2 is that, as shown in Figure 1, a first sludge conveying pump 10 and a second sludge conveying pump 11 are fixedly installed on the first sludge conveying pipeline 6 between the inlet and outlet of the first sludge connecting pipeline 8 and the second sludge conveying pipeline 7 between the inlet and outlet of the second sludge connecting pipeline 9, respectively.

[0025] Example 3: It differs from Examples 1 to 2 in that, as shown in Figure 1, it also includes a third wastewater reaction tank 12 and a fourth wastewater reaction tank 13. A third wastewater transmission pipeline 14 is fixedly connected between the second wastewater transmission pipeline 5 and the inlet of the third wastewater reaction tank 12. A fourth wastewater transmission pipeline 15 is fixedly connected between the second wastewater transmission pipeline 5 between the third wastewater transmission pipeline 14 and the second wastewater reaction tank 3 and the inlet of the fourth wastewater reaction tank 13. A third sludge transmission pipeline 16 is fixedly connected between the bottom outlet of the third wastewater reaction tank 12 and the first sludge transmission pipeline 6 between the outlet of the first sludge transmission pump 10 and the first sludge connecting pipeline 8. A fourth sludge transmission pipeline 17 is fixedly connected between the bottom outlet of the fourth wastewater reaction tank 13 and the second sludge transmission pipeline 7 between the outlet of the second sludge transmission pump 11 and the second sludge connecting pipeline 9.

[0026] Example 4: It differs from Examples 1 to 3 in that, as shown in Figure 1, a third sludge conveying pump 18 and a fourth sludge conveying pump 19 are fixedly installed on the third sludge conveying pipeline 16 and the fourth sludge conveying pipeline 17, respectively.

[0027] Example 5: It differs from Examples 1 to 5 in that, as shown in Figure 1, a third sludge connecting pipeline 20 is fixedly connected between the first sludge conveying pipeline 6 and the inlet of the third sludge conveying pipeline 16 between the third sludge conveying pipeline 16 and the first sludge connecting pipeline 8, and a fourth sludge connecting pipeline 21 is fixedly connected between the inlet of the fourth sludge conveying pipeline 17 and the first sludge conveying pipeline 6 between the first sludge connecting pipeline 8 and the second sludge conveying pipeline 7.

[0028] Example 6: The difference between Example 1 to Example 6 is as follows: As shown in Figure 1, the following pipelines are connected: the first sludge connecting pipeline 8, the first sludge conveying pipeline 6 between the first sludge connecting pipeline 8 and the inlet of the first sludge conveying pump 10, the first sludge conveying pipeline 6 between the first sludge conveying pump 10 and the third sludge conveying pipeline 16, the first sludge conveying pipeline 6 between the third sludge conveying pipeline 16 and the third sludge connecting pipeline 20, the third sludge conveying pipeline 16 between the first sludge conveying pipeline 6 and the outlet of the third sludge conveying pump 18, the third sludge conveying pipeline 16 between the inlet of the third sludge conveying pump 18 and the third sludge connecting pipeline 20, the third sludge connecting pipeline 20, the fourth sludge connecting pipeline 21, the fourth sludge conveying pipeline 17 between the fourth sludge connecting pipeline 21 and the inlet of the fourth sludge conveying pump 19, and the fourth sludge conveying pipeline 17 between the outlet of the fourth sludge conveying pump 19 and the second sludge conveying pipeline 7. The following valves are fixedly installed on the following pipelines: the second sludge conveying pipeline 7 between the fourth sludge conveying pipeline 17 and the second sludge connecting pipeline 9; the second sludge conveying pipeline 7 between the fourth sludge conveying pipeline 17 and the outlet of the second sludge conveying pump 11; the second sludge conveying pipeline 7 between the inlet of the second sludge conveying pump 11 and the second sludge connecting pipeline 9; the second sludge connecting pipeline 9; and the first sludge conveying pipeline 6 between the outlet of the second sludge conveying pipeline 6 and the outlet of the first sludge conveying pipeline 6: first switch valve 22, second switch valve 23, third switch valve 24, fourth switch valve 25, fifth switch valve 26, sixth switch valve 27, seventh switch valve 28, eighth switch valve 29, ninth switch valve 30, tenth switch valve 31, eleventh switch valve 32, twelfth switch valve 33, thirteenth switch valve 34, fourteenth switch valve 35, and fifteenth switch valve 36.

[0029] If, as needed, the sludge in one of the wastewater reaction tanks (first wastewater reaction tank 2, second wastewater reaction tank 3, third wastewater reaction tank 12, and fourth wastewater reaction tank 13) is subjected to a high concentration of wastewater, inhibiting the growth of microorganisms, process adjustments can be made to replace the need for re-addition of sludge, thus achieving sludge mixing between the independent reaction tanks. The following explanation uses the sludge mixing between the first wastewater reaction tank 2 and the second wastewater reaction tank 3 as an example.

[0030] Sludge is transferred from the first wastewater reaction tank 2 to the second wastewater reaction tank 3: the second switch valve 23, the third switch valve 24, the fourth switch valve 25, and the fourteenth switch valve 35 are opened, the first switch valve 22, the fifth switch valve 26, the seventh switch valve 28, the eighth switch valve 29, the eleventh switch valve 32, and the fifteenth switch valve 36 are closed, the first sludge transfer pump 10 is started, and the activated sludge in the first wastewater reaction tank 2 enters the second wastewater reaction tank 3 along the first sludge transfer pipeline 6, the second sludge transfer pipeline 7 (partial), and the second sludge connecting pipeline 9.

[0031] The second wastewater reaction tank 3 transfers sludge to the first wastewater reaction tank 2: the thirteenth switch valve 34, the twelfth switch valve 33, the eleventh switch valve 32, and the first switch valve 22 are opened; the tenth switch valve 31, the fourteenth switch valve 35, the fifteenth switch valve 36, the eighth switch valve 29, the fourth switch valve 25, and the seventh switch valve 28 are closed; the second sludge transfer pump 11 is started; the activated sludge in the second wastewater reaction tank 3 enters the first wastewater reaction tank 2 along the second sludge transfer pipeline 7, the first sludge transfer pipeline 6 (partial), and the first sludge connecting pipeline 8.

[0032] Depending on the needs, the pipelines and equipment of the sludge preparation device for the wastewater reaction tank may also be equipped with conventional on / off valves, thermometers, and pressure gauges that are known and commonly used in the field.

[0033] The above technical features constitute various embodiments of this utility model, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

[0034] Before and after use: Before use, 4 truckloads of activated sludge were purchased annually, with a total cost of 16,000 yuan for the purchase of activated sludge and manual loading and unloading. The acclimatization time for newly loaded activated sludge was 3 to 6 weeks. After use, the sludge in the wastewater reaction tank can be mixed with each other without special acclimatization and can treat wastewater normally.

[0035] The usage process of this utility model embodiment is as follows: Taking the third sewage reaction tank 12 and the fourth sewage reaction tank 13 as examples, firstly, the sewage to be treated enters the buffer tank 1 for mixing and homogenization to obtain homogenized sewage; then, the homogenized sewage (with excessive concentration) enters the third sewage reaction tank 12, and after biochemical reaction, produces sewage permeate and impact sludge; finally, the impact sludge is discharged through the third sludge transfer pump 18, and the activated sludge in the fourth sewage reaction tank 13 enters the third sewage reaction tank 12 through the fourth sludge transfer pump 19, the third sludge transfer pipeline 16 (including part of the second sludge connecting pipeline 9 and the first sludge connecting pipeline 8), and the third sludge connecting pipeline 20.

Claims

1. A sludge preparation device for a wastewater reaction tank, characterized in that... The system includes a buffer tank, a first wastewater reaction tank, and a second wastewater reaction tank. A first wastewater transport pipeline is fixedly connected between the bottom outlet of the buffer tank and the inlet of the first wastewater reaction tank. A second wastewater transport pipeline is fixedly connected between the first wastewater transport pipeline and the inlet of the second wastewater reaction tank. A first sludge transport pipeline is fixedly connected to the outlet of the first wastewater reaction tank. A second sludge transport pipeline is fixedly connected between the outlet of the second wastewater reaction tank and the first sludge transport pipeline. A first sludge connecting pipeline is fixedly connected to the first sludge transport pipeline between the inlet of the first sludge transport pipeline and the second sludge transport pipeline. A second sludge connecting pipeline is fixedly connected to the second sludge transport pipeline between the inlet of the second sludge transport pipeline and the outlet of the second sludge transport pipeline.

2. The sludge preparation device for a wastewater reaction tank according to claim 1, characterized in that... A first sludge conveying pump and a second sludge conveying pump are fixedly installed on the first sludge conveying pipeline between the inlet and outlet of the first sludge connecting pipeline, and on the second sludge conveying pipeline between the inlet and outlet of the second sludge connecting pipeline.

3. The sludge preparation device for a wastewater reaction tank according to claim 2, characterized in that... It also includes a third wastewater reaction tank and a fourth wastewater reaction tank. A third wastewater transmission pipeline is fixedly connected between the second wastewater transmission pipeline and the inlet of the third wastewater reaction tank. A fourth wastewater transmission pipeline is fixedly connected between the second wastewater transmission pipeline between the third wastewater transmission pipeline and the second wastewater reaction tank and the inlet of the fourth wastewater reaction tank. A third sludge transmission pipeline is fixedly connected between the bottom outlet of the third wastewater reaction tank and the first sludge transmission pipeline between the outlet of the first sludge transmission pump and the first sludge connecting pipeline. A fourth sludge transmission pipeline is fixedly connected between the bottom outlet of the fourth wastewater reaction tank and the second sludge transmission pipeline between the outlet of the second sludge transmission pump and the second sludge connecting pipeline.

4. The sludge preparation device for a wastewater reaction tank according to claim 3, characterized in that... The third sludge conveying pipeline and the fourth sludge conveying pipeline are respectively fixedly installed with a third sludge conveying pump and a fourth sludge conveying pump.

5. The sludge preparation device for a wastewater reaction tank according to claim 3 or 4, characterized in that... A third sludge connecting pipeline is fixedly connected between the inlet of the first sludge conveying pipeline and the inlet of the third sludge conveying pipeline. A fourth sludge connecting pipeline is fixedly connected between the inlet of the fourth sludge conveying pipeline and the first sludge conveying pipeline between the first sludge connecting pipeline and the second sludge conveying pipeline.

6. The sludge preparation device for a wastewater reaction tank according to claim 5, characterized in that... The first sludge connecting pipeline, the first sludge conveying pipeline between the first sludge connecting pipeline and the inlet of the first sludge conveying pump, the first sludge conveying pipeline between the first sludge conveying pump and the third sludge conveying pipeline, the first sludge conveying pipeline between the third sludge conveying pipeline and the third sludge connecting pipeline, the third sludge conveying pipeline between the first sludge conveying pipeline and the outlet of the third sludge conveying pump, the third sludge conveying pipeline between the inlet of the third sludge conveying pump and the third sludge connecting pipeline, the third sludge connecting pipeline, the fourth sludge connecting pipeline, the fourth sludge conveying pipeline between the fourth sludge connecting pipeline and the inlet of the fourth sludge conveying pump, the fourth sludge conveying pipeline between the outlet of the fourth sludge conveying pump and the second sludge conveying pipeline, and the fourth sludge conveying pipeline. A first switch valve, a second switch valve, a third switch valve, a fourth switch valve, a fifth switch valve, a sixth switch valve, a seventh switch valve, an eighth switch valve, a ninth switch valve, a tenth switch valve, an eleventh switch valve, a thirteenth switch valve, a fourteenth switch valve, and a fifteenth switch valve are fixedly installed on the second sludge conveying pipeline between the pipeline and the second sludge connecting pipeline, the second sludge conveying pipeline between the fourth sludge conveying pipeline and the outlet of the second sludge conveying pump, the second sludge conveying pipeline between the inlet of the second sludge conveying pump and the second sludge connecting pipeline, the second sludge connecting pipeline, and the first sludge conveying pipeline between the second sludge conveying pipeline and the outlet of the first sludge conveying pipeline, respectively.

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