CN221744735U - A new type of direct cooling device for outlet air temperature of water treatment blower - Google Patents

Abstract

The utility model discloses a novel direct cooling device for the air temperature at the outlet of a water treatment blower, which comprises a cooling box body, a secondary spraying device and a baffling defogging water receiver, wherein an air temperature air inlet and an air temperature air outlet are arranged on the cooling box body, the secondary spraying device comprises a first-stage spraying device and a second-stage spraying device, wherein the first-stage spraying device is arranged in an air temperature air inlet port of the cooling device, a nozzle on the first-stage spraying device and the air temperature air inlet direction are installed in the same direction, the second-stage spraying device is arranged in the cooling box body, the spraying direction of the nozzle is opposite to the rising flow direction of air flow, the baffling defogging water receiver is arranged at the air temperature air outlet, and a condensed water outlet below the baffling defogging water receiver is connected with the cooling box body through a condensed water collecting pipe. The utility model can realize higher energy efficiency ratio, has higher cooling speed compared with an indirect heat exchange device, is relatively energy-saving and has lower cost.

Description

A new type of direct cooling device for outlet air temperature of water treatment blower

Technical Field

The utility model belongs to the field of cooling and lowering the air temperature of a blower air supply in an industrial sewage/urban sewage biochemical treatment system, and specifically relates to a novel outlet air temperature direct cooling device for a water treatment blower.

Background Art

The activated sludge method is the most widely used and mature sewage treatment process. One of the indispensable equipment in this process is the blower. The blower aeration sends compressed air into the pool through the pipeline and diffuses oxygen into the mud-water mixture in the form of bubbles for the growth of aerobic microorganisms in the sludge. In the sewage treatment process, the energy consumption of the blower aeration system accounts for more than 50% of the energy consumption of the entire process system.

At present, the biochemical aeration of industrial wastewater and urban sewage treatment systems all use blowers to supply air. Among them, the centrifugal blower is a mechanical device that uses centrifugal force to suck gas or air from the inlet and discharge it from the outlet after compression. Its working principle is mainly to accelerate the gas or air to a high speed through centrifugal force, and then guide it through the curved channel in the centrifuge shell. When the centrifugal force reaches the highest point, it is compressed at the same time, so that the gas or air forms a high temperature and high pressure state at the centrifuge outlet, thereby meeting the needs of different fields.

In addition, the current reasons affecting the temperature increase of the activated sludge tank of the sewage treatment plant are:

1. The normal operating temperature range of the blower is 50-95℃. Generally, the temperature of the Roots blower is proportional to the pressure and speed. That is to say, the higher the pressure and speed of the blower, the higher the operating temperature of the Roots blower.

2. The inlet temperature of the fan is too high, resulting in high outlet temperature. In addition, if the centrifugal fan works for a long time, the air or gas temperature at the inlet may rise, causing the outlet temperature to become higher and higher;

3. Affected by the high ambient temperature in summer, the biochemical pool cannot dissipate heat after being covered and deodorized, and the temperature of wastewater discharged into the sewage treatment plant is high;

4. During the wastewater treatment process, due to the influence of ambient temperature and aeration temperature, the activity of biochemical sludge and biological bacteria decreases. At this time, the amount of wastewater to be treated is reduced, and the aeration is operated normally, which makes the temperature of the biochemical treatment pool higher and higher, resulting in a gradual reduction in the amount of biochemical treatment water;

5. In summer, due to the high temperature of incoming water and high ambient temperature, the operating water temperature of the biochemical pool exceeds 40°C, and the activity and bacterial count of activated sludge microorganisms are greatly reduced, resulting in a gradual decrease in the efficiency of biochemical treatment, or even paralysis.

As can be seen from the above, the blower outlet air temperature is one of the reasons that affect the temperature increase of the activated sludge pool. At present, there is a method of sampling the heat exchanger to reduce the outlet air temperature. As a common heat and cold transfer equipment, the temperature difference when the heat medium flows through the heat exchanger, the inlet and outlet temperature is one of the important indicators for evaluating the performance of the heat exchanger. Therefore, reasonable control of the inlet and outlet temperature is an important factor to ensure the normal operation of the heat exchanger. The reasonable range of the inlet and outlet temperature difference of the heat exchanger will vary depending on the specific application market. In general, the inlet and outlet temperature difference should be within 5°C. This is because when the temperature difference is small, the internal flow velocity of the coolant is higher and the heat can be taken away faster, thereby improving the heat exchange efficiency. If the temperature difference is too large, the tube bundle density is increased to increase the heat exchange area outside the tube to achieve a large temperature difference, but the equipment investment is high, the consumption is high, and the maintenance cost is high. However, it has been proved in practice that the use of heat exchangers to reduce the outlet air temperature is not only inefficient, but also has the problems of high energy consumption and high cost.

Therefore, it is urgent to design a cooling device that can reduce the air temperature at the blower outlet to improve this problem.

Utility Model Content

The utility model aims to provide a novel water treatment blower outlet wind temperature direct cooling device, aimed at the high temperature of the summer environment, high aeration temperature, some problems that affect the normal operation of biochemical activated sludge, so as to solve the high aeration temperature to ensure the normal operation and treatment efficiency of biochemical activated sludge, and realize long-term safe operation.

To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a new type of direct cooling device for the outlet wind temperature of a water treatment blower, including a cooling box, a two-stage spray device and a deflecting demister and water collector, the cooling box is provided with a wind-warm air inlet and a wind-warm air outlet, the two-stage spray device includes a first-stage spray device located below and a second-stage spray device located above, wherein the first-stage spray device is arranged in the wind-warm air inlet port of the cooling device, and the nozzle on the first-stage spray device is installed in the same direction as the wind-warm air inlet direction, the second-stage spray device is arranged inside the cooling box, and the spray direction of its nozzle is facing the upward flow direction of the airflow, the wind-warm air inlet is arranged below the cooling box, and the wind-warm air outlet is arranged above the cooling box, the deflecting demister and water collector is installed at the wind-warm air outlet, and the condensation outlet below it is connected to the cooling box through a condensation water collection pipe.

As a further preferred embodiment of the present invention, the device further comprises an automatic drainage device, which is arranged below the cooling box and is used to drain excess cooling water in the cooling box.

As a further preferred embodiment of the present invention, a liquid level meter is provided on the cooling box body, and the liquid level meter is used to monitor the liquid level height at the bottom of the cooling box body. The liquid level meter is also interconnected with the automatic drainage device to realize linkage control of the automatic drainage device.

As a further optimization of this solution, a temperature controller is provided at the wind temperature air outlet of the cooling box, and the temperature controller is also connected to the automatic regulating valve of the water supply mechanism of the spray device to achieve interlocking of temperature control and cooling water volume.

As a further preferred embodiment of the present invention, the first-stage spray device and the second-stage spray device share a spray water inlet, and the spray water inlet is arranged at the end of the second-stage spray device, and the first-stage spray device is connected to the spray water inlet above it through a connecting pipe.

As a further preferred embodiment of this solution, the second-stage spray device is arranged 800-1200 mm below the top of the cooling box.

As a further preferred embodiment of this solution, the first-stage spraying device is provided with 1-3 nozzles, and the second-stage spraying device is provided with 6-12 nozzles.

As a further preferred embodiment of the present invention, the deflector demister water collector is installed on the cooling box in a built-in or external manner.

As a further preferred embodiment of this solution, an inspection hole is also provided on the cooling box body.

As a further preferred embodiment of this solution, the warm air inlet is connected to the blower outlet pipe; the warm air outlet is connected to the biochemical pool aeration main pipe.

Compared with the prior art, the utility model has the following beneficial effects: the utility model has two characteristics: high energy efficiency ratio and fast cooling; firstly, the device directly cools and cools without heat exchange cooling heat transfer medium, so it can achieve a higher energy efficiency ratio. Secondly, compared with the indirect heat exchange device, the device has a faster direct cooling speed and will not cause heat transfer loss like the heat exchanger. Compared with the heat exchanger, it can save energy and investment.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a schematic diagram of the overall structure of the utility model of the direct cooling device for the outlet air temperature of the water treatment blower (with the deflector demister and water collector externally mounted).

FIG. 2 is a schematic diagram of the overall structure of the utility model of the water treatment blower outlet air temperature direct cooling device (with a baffled demister and water collector built in).

Markings in the figure are: 1-cooling box, 2-wind temperature air inlet, 3-secondary spray device, 4-spray water inlet, 5-baffle demister water collector, 6-wind temperature air outlet, 7-liquid level meter, 8-automatic drainage device, 9-temperature controller, 10-condensate collection pipe, 11-inspection hole.

DETAILED DESCRIPTION

The utility model is described in detail below with reference to the accompanying drawings and specific embodiments.

Embodiment 1

As shown in FIG1 , a novel water treatment blower outlet wind temperature direct cooling device comprises a cooling box 1, a secondary spray device 3, a deflection demister water collector 5, an automatic drainage device 8, a liquid level meter 7 and a temperature controller 9, wherein the cooling box 1 is provided with a wind temperature air inlet 2 and a wind temperature air outlet 6, wherein the secondary spray device comprises a first-stage spray device located below and a second-stage spray device located above, wherein the first-stage spray device is arranged in the wind temperature air inlet port of the cooling device, and the nozzle on the first-stage spray device is aligned with the wind temperature air inlet port. Installed in the same direction, the second-stage spray device is arranged inside the cooling box 1, and the spray direction of its nozzle is facing the upward flow direction of the air flow. The wind-warm air inlet 2 is arranged below the cooling box 1, and the wind-warm air outlet 6 is arranged above the cooling box 1. The wind-warm air inlet 1 is connected to the blower outlet pipe, and the wind-warm air outlet 6 is connected to the aeration main pipe of the biochemical pool. A temperature controller 9 is provided at the wind-warm air outlet 6 of the cooling box 1. The temperature controller 9 is also connected to the water supply mechanism regulating valve of the spray device to realize the interlocking of temperature control and cooling water volume. The automatic drainage device 8 is arranged below the cooling box to discharge the excess water in the cooling box 1. The liquid level meter 7 is used to monitor the liquid level height at the bottom of the cooling box. It is also interconnected with the automatic drainage device 8 to realize the linkage control of the automatic drainage device. The deflection mist collector 5 is externally installed at the wind-warm air outlet 6, and the condensation outlet below it is connected to the condensation water inlet below the cooling box 1 through the condensation water collection pipe 10.

In this embodiment, the first-stage spray device and the second-stage spray device share a spray water inlet 4, and the spray water inlet 4 is arranged at the end of the second-stage spray device. The first-stage spray device is connected to the spray water inlet above it through a connecting pipe. The first-stage spray device is provided with 1-3 nozzles for realizing primary gas-liquid contact cooling. The second-stage spray device is arranged 800-1200mm below the top of the cooling box body, and the second-stage spray device is provided with 6-12 nozzles. The nozzles are installed in the opposite direction to the rising airflow, and the rising airflow forms convection with the spray liquid to achieve uniform and sufficient contact, direct contact cooling, and realize secondary gas-liquid contact cooling.

In this embodiment, a maintenance hole 11 is provided on the cooling box body 1 for easy maintenance.

Embodiment 2

As shown in Figure 2, the difference between this embodiment and embodiment 1 is that the deflector defogger and water collector 5 is installed inside the warm air outlet 6, and the condensation outlet below it is connected to the condensation water collection pipe 10. The condensation water collection pipe 10 is located inside the cooling box 1, and its lower end extends to the bottom of the cooling box 1.

In summary, the new type of water treatment blower outlet wind temperature direct cooling device in the above two embodiments, the air entering the wind temperature direct cooling device is first sprayed by the first level and then sprayed by the second level. In this process, the wind temperature air is fully contacted with the gas and liquid in the box to achieve direct cooling, and the rising gas phase carries the mist and rises to the baffle demister water collector. The rising air carries a large amount of water mist, and the water mist in the air is recovered by the baffle demister water collector to recover condensed water; and the wind temperature direct cooling device is provided with a liquid level meter, an automatic drainage device and a temperature controller. When the liquid level monitored by the liquid level meter is higher than the limit height, the automatic drainage device automatically discharges the condensed water to the recovery pool. When the liquid level is lower than the limit height, the automatic drainage device is closed; then the temperature controller is arranged on the pipeline where the wind temperature air outlet is connected to the biochemical aeration main pipe, and the temperature controller is interlocked with the condensed water inlet automatic regulating valve. When the temperature is lower than the set limit, the condensed water flow rate is reduced, and when the temperature is higher than the set limit, the condensed water flow rate is increased, so as to realize energy-saving automatic control operation to adjust the ambient temperature and the wind temperature and air temperature of the biochemical pool to achieve energy saving.

The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the above embodiments do not limit the protection scope of the utility model in any form, and all technical solutions obtained by equivalent replacement and the like fall within the protection scope of the utility model. The parts not involved in the utility model are the same as the prior art or can be implemented by the prior art.

Claims (10)

1. The utility model provides a novel water treatment air-blower outlet wind temperature direct cooling device, its characterized in that, including cooling box, second grade spray set and baffling defogging water receiver, be provided with wind temperature air inlet and wind temperature air outlet on the cooling box, second grade spray set is including the first level spray set that is located the below and the second level spray set that is located the top, and wherein first level spray set sets up in cooling device's wind temperature air inlet port, and the nozzle on the first level spray set and wind temperature air inlet direction syntropy installation, second level spray set sets up inside the cooling box, and the jet direction of its nozzle just faces the air current ascending direction, wind temperature air inlet is located cooling box below, and wind temperature air outlet locates cooling box top, baffling defogging water receiver installs in wind temperature air outlet department, and the condensate outlet of its below passes through the comdenstion water collecting pipe and connects cooling box.

2. The novel direct cooling device for the outlet air temperature of the water treatment blower according to claim 1, further comprising an automatic drainage device, wherein the automatic drainage device is arranged below the cooling box body and is used for draining redundant cooling water in the cooling box body.

3. The novel direct cooling device for the outlet air temperature of the water treatment blower according to claim 2, wherein a liquid level meter is arranged on the cooling box body and is used for monitoring the liquid level height of the bottom of the cooling box body, and the liquid level meter is connected with the automatic drainage device at the same time to realize the linkage control of the automatic drainage device.

4. The novel direct cooling device for the air temperature at the outlet of the water treatment blower according to claim 1, wherein a temperature controller is arranged at the air outlet of the cooling box body, and the temperature controller is connected with an automatic regulating valve of a water supply mechanism of the spraying device at the same time to realize temperature control and cooling water quantity interlocking.

5. The novel direct cooling device for the outlet air temperature of the water treatment blower according to claim 1, wherein the first-stage spraying device and the second-stage spraying device share a spray water inlet, the spray water inlet is arranged at the end part of the second-stage spraying device, and the first-stage spraying device is communicated with the spray water inlet above the first-stage spraying device through a communicating pipe.

6. The novel direct cooling device for the outlet air temperature of the water treatment blower according to claim 1, wherein the second-stage spraying device is arranged at the position 800-1200mm below the inner top of the cooling box body.

7. The novel direct cooling device for the outlet air temperature of the water treatment blower according to claim 1, wherein the first-stage spraying device is provided with 1-3 nozzles, and the second-stage spraying device is provided with 6-12 nozzles.

8. The novel direct cooling device for the outlet air temperature of the water treatment blower according to claim 1, wherein the baffling defogging water receiver is arranged on the cooling box body in a built-in or externally-hung mode.

9. The novel direct cooling device for the outlet air temperature of the water treatment blower according to claim 1, wherein the cooling box body is further provided with a manhole.

10. The novel direct cooling device for the outlet air temperature of the water treatment blower according to claim 1, wherein the air inlet for the air temperature is connected with the air outlet pipe of the blower; the air temperature air outlet is connected with an aeration main pipe of the biochemical tank.