Secondary dust remover for fine grid drying device

Abstract

The utility model discloses a secondary dust remover for a fine grid drying device, which is arranged at the rear end of the fine grid drying device and comprises a bag-type dust remover and a pulse dust remover which are in modular connection. The bag-type dust collector comprises a dust collector body arranged on the fine grid drying device; an ash hopper and a cyclone device are arranged on the dust remover body, an air inlet connected with an air outlet in the top of the fine grid drying device is formed in the bottom of the ash hopper of the dust remover body, an air outlet connected with a pulse dust remover is formed in the top of the dust remover body, and a discharging port connected with the side face of the fine grid drying device is formed in the upper portion of the dust remover body; the lower part of the pulse dust collector is provided with an air inlet connected with the air outlet of the bag-type dust collector, and the upper part of the pulse dust collector is provided with an air outlet connected with a heating system of the fine grid drying device. According to the utility model, the dried hot air flow can be separated from the slag of the fine screen, so that the hot air flow can be recycled, and the heat loss can be reduced to the maximum extent.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, and more specifically, to a secondary dust collector for a fine grille drying device. Background Art

[0002] The grille is the first treatment process that sewage goes through after entering the sewage treatment plant. Generally, grilles are divided into three categories according to the clear spacing of the grid bars: coarse grilles (50 - 100 mm), medium grilles (16 - 40 mm), and fine grilles (3 - 10 mm); among them, the function of the fine grille is to control the size of suspended pollutants in the water that finally enters the subsequent treatment unit, so as to prevent them from accumulating in the subsequent treatment unit, thereby damaging related equipment or affecting the effluent quality; generally, the grid residue obtained at the fine grille is transported out manually after being pressed by a press and pushed into a trash can. Since the particle size of the fine grille grid residue is relatively small, transporting the fine grille grid residue in this way will cause a poor environment in the treatment workshop, and it is time-consuming and laborious.

[0003] Therefore, in order to ensure the workshop environment for the treatment of fine grille grid residue and solve the problem of time-consuming and laborious manual transportation, in-depth analysis and research were carried out on the sewage pretreatment workshop of the sewage treatment plant. Finally, the original ground open sewage pretreatment area was transferred to an underground sealed space for treatment, and the vacuum adsorption principle was used to transport garbage such as grid residue and grit everywhere to the ground layer for transfer through pipeline-type closed transportation, while the above-ground part can be transformed into a garden-style landscape, and based on this, the transformation of the ultra-clean space for sewage pretreatment in the sewage treatment plant was completed. However, during the process of transporting the fine grille grid residue by pipeline, the transport pipeline is prone to blockage, and the fine grille grid residue needs to be dried before it can be transported. However, the hot air flow after drying by the existing drying device cannot be separated from the fine grille grid residue. If discharged together, the hot air flow cannot be recovered, which will cause waste of energy. Summary of the Utility Model

[0004] Aiming at the above-mentioned defects existing in the prior art, the purpose of the utility model is to provide a secondary dust collector for a fine grille drying device, which can separate the hot air flow after drying from the fine grille grid residue, realize the recycling of the hot air flow, and maximize the reduction of heat loss.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a secondary dust collector for a fine grille drying device, which is arranged at the rear end of the fine grille drying device. The secondary dust collector includes a bag dust collector and a pulse dust collector that are modularly connected;

[0007] The bag filter includes a filter body disposed above the fine grille drying device; a hopper and a cyclone device for generating a cyclone air flow are provided on the filter body. An air inlet connected to the air outlet at the top of the fine grille drying device is provided at the bottom of the hopper of the filter body. An air outlet connected to the pulse filter is provided at the top of the filter body. A discharge port connected to the side of the fine grille drying device is provided at the upper part of the filter body.

[0008] The lower part of the pulse filter is provided with an air inlet connected to the air outlet of the bag filter, and an air outlet connected to the heating system of the fine grille drying device is provided at the upper part of the pulse filter.

[0009] Preferably, the air outlet of the bag filter is connected to the air inlet of the pulse filter through an air discharge pipe; the discharge port of the bag filter is connected to the side feed port of the fine grille drying device through a side pipe.

[0010] Preferably, the bag filter is installed above the fine grille drying device through a frame.

[0011] Preferably, a control panel and a pressure gauge are further provided on the pulse filter.

[0012] The secondary dust collector for the fine grille drying device provided by the present utility model specifically has the following advantages:

[0013] 1. The secondary dust collector for the fine grille drying device of the present utility model can separate the dried hot air flow from the fine grille residue, realizing the recycling of the hot air flow.

[0014] 2. The secondary dust collector for the fine grille drying device of the present utility model guides the dried hot air flow into the rotating air flow, uses the centrifugal force to separate the dried fine grille residue from the hot air flow and capture it on the wall of the device, and then falls into the hopper by the action of gravity. After the separated hot air flow filters out the fine dust, it returns to the fine grille drying device for recycling.

[0015] 3. The secondary dust collector for the fine grille drying device of the present utility model has the characteristics of simple structure, stable operation, and convenient maintenance and management. The bag filter has good separation efficiency for large-particle dust, and after separation, the fine dust can also be filtered by the cyclone dust collector. The hot air in the original air flow will return to the upper-level fine grille drying device for recycling, maximizing the reduction of heat loss.

[0016] 4. The present utility model has a simple structure and stable operation. The device adopts a modular design, and the connection between components is tight, which is easy to install and disassemble.

[0017] 5. The maintenance and management of the utility model are convenient. Since the device has a simple structure, it is relatively easy to maintain. Regularly cleaning the dust removal bag and replacing the worn parts can keep it in good working condition.

[0018] 6. The utility model can maximize the reduction of heat loss. It can effectively separate the hot air flow generated during the drying process and reintroduce the separated hot air flow into the fine grille drying device to achieve the recycling of heat and minimize heat loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the secondary dust collector for the fine grille drying device of the utility model;

[0020] Figure 2 is a schematic structural diagram of the bag dust collector of the utility model;

[0021] Figure 3 is a schematic structural diagram of the pulse dust collector of the utility model;

[0022] Figure 4 is a layout diagram of the secondary dust collector in the fine grille drying device of the utility model;

[0023] In the figure, 10. Bag dust collector; 11. Ash bin; 12. Frame; 13. Air inlet; 14. Air outlet; 15. Air outlet pipe; 16. Discharge port; 17. Side pipe; 20. Pulse dust collector; 21. Air inlet; 22. Air outlet; 23. Control panel; 24. Pressure gauge; 30. Fine grille drying device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In order to better understand the above technical solutions of the utility model, the technical solutions of the utility model will be further described below with reference to the drawings and embodiments.

[0025] During the operation of the sewage treatment plant, the original ground open sewage pretreatment is transferred to an underground sealed space, and the grille scum is transported to the ground layer for transfer through a pipeline-type closed conveyor using the vacuum adsorption principle. At the same time, devices such as crushing, dehydration, and drying equipment are equipped in the underground sealed space to facilitate the treatment of various differently shaped scum generated in the sewage pretreatment process. The above-ground part can be transformed into a garden-style landscape, thereby reducing environmental pollution during sewage treatment, effectively improving the factory environment of the sewage treatment plant, and enhancing the air quality of the factory area, so as to carry out the transformation of the ultra-clean space for sewage pretreatment in the sewage treatment plant.

[0026] The utility model is one of the important technologies in the renovation plan of the ultra-clean space for the pretreatment of sewage plants. During the drying process of the fine grille screenings, the dried fine grille screenings are separated from the hot air stream, and the separated hot air stream is reintroduced into the drying device to realize the recycling of heat, thereby reducing heat loss and improving energy utilization efficiency.

[0027] Combined with Figure 1 、 Figure 4 As shown in the figure, a secondary dust collector for a fine grille drying device provided by the utility model is arranged at the rear end of the fine grille drying device 30, which can separate the dried grille screening materials from the hot air stream, recover the dried hot air stream, reduce heat loss, and improve energy utilization efficiency.

[0028] Combined with Figure 1 As shown in the figure, the secondary dust collector includes a bag filter 10 and a pulse dust collector 20 connected modularly; among them, the bag filter 10 uses the centrifugal force generated by the cyclone air flow to separate the dried grille screenings from the hot air stream, and the separated materials are trapped on the wall of the ash hopper 11. The separated hot air stream is further filtered by the pulse dust collector 20, and after removing the fine dust, it enters the heating system of the fine grille drying device 30 for recycling.

[0029] Combined with Figure 1 、 Figure 2 As shown in the figure, the bag filter 10 includes a dust collector body arranged above the fine grille drying device 30; a dust hopper 11 and a cyclone device for generating cyclone air flow are provided on the dust collector body. The bottom of the dust hopper 11 of the dust collector body is provided with an air inlet 13 connected to the air outlet at the top of the fine grille drying device, the top of the dust collector body is provided with an air outlet 14 connected to the pulse dust collector 20, and the upper part of the dust collector body is provided with a discharge port 16 connected to the side of the fine grille drying device.

[0030] Combined with Figure 2 As shown in (a) and (b) in the figure, the bag filter 10 is installed above the fine grille drying device through a frame 12. Among them, the air outlet of the bag filter 10 is connected to the air inlet of the pulse dust collector 20 through an air outlet pipe 15; the discharge port 16 of the bag filter 10 is connected to the side feed port of the fine grille drying device 30 through a side pipe 17. Combined with Figure 1 、 Figure 4 As shown in the figure, the dried hot air and the fine grille screenings entrained therein enter the bag filter 10 through the air inlet. After being separated by the centrifugal force generated by the cyclone air flow, the fine grille screenings return to the fine grille drying device 30 through the discharge port 16 and the side pipe, and the separated hot air stream enters the pulse dust collector 20 through the air outlet 14 at the top and the air outlet pipe 15 for further treatment.

[0031] Combined with Figure 3As shown in (a) and (b) of Figure [X], an air inlet 21 connected to the air outlet 14 of the bag filter 10 is provided at the lower part of the pulse dust collector 20, and an air outlet 23 connected to the heating system of the fine grille drying device is provided at the upper part of the pulse dust collector 20. In combination with Figure 1 and Figure 4 As shown, the hot air flow after being dust-removed by the bag filter 10 enters the pulse dust collector 20 through the air outlet pipe 15 for further filtration. After removing the fine dust, it enters the heating system of the fine grille drying device for recycling.

[0032] In combination with Figure 3 As shown in (a) and (b) of Figure [X], a control panel 23 and a pressure gauge 24 are also provided on the pulse dust collector 20; the control panel 23 is used to control the pulse cycle of the pulse dust collector 20, etc., and the pressure gauge 24 is used to display the pressure inside the pulse dust collector 20.

[0033] In combination with Figure 4 As shown, on the secondary dust collector, the temperature of the hot air flow at the air inlet 13 of the bag filter 10 is about 80°C. After being dust-removed by the bag filter 10 and the pulse dust collector 20, the temperature of the hot air flow is about 60°C. Then it flows back to the heating system of the fine grille drying device and is re-introduced into the fine grille drying device 30 to realize the recycling of heat. In this way, the loss of heat can be minimized, and at the same time, the demand of the fine grille drying device 30 for external energy is reduced, and the operation cost is lowered.

[0034] The transformation of the ultra-clean space in the pretreatment of the sewage treatment plant is a major engineering project in Shanghai and also the first application in the pretreatment area of the sewage treatment plant. As one of the important technologies in the transformation plan of the ultra-clean space in the pretreatment of the sewage treatment plant, the present utility model improves the transformation plan of the ultra-clean space in the pretreatment of the sewage treatment plant, can separate the dried hot air flow from the fine grille slag, realize the recycling of the hot air flow, and maximize the reduction of heat loss.

[0035] Those of ordinary skill in the art in this technical field should recognize that the above embodiments are only used to illustrate the present utility model and are not used to limit the present utility model. As long as it is within the scope of the essential spirit of the present utility model, the changes and modifications to the above embodiments will fall within the scope of the claims of the present utility model.

Claims

1. A secondary dust collector for a fine grid drying device, characterized in that: Arranged at the rear end of the fine grid drying device, the secondary dust collector includes a modularly connected bag dust collector and a pulse dust collector; The bag dust collector comprises a dust collector body arranged above the fine grid drying device; the dust collector body is provided with an ash hopper and a cyclone device for generating a cyclone airflow, the bottom of the ash hopper of the dust collector body is provided with an air inlet connected to the air outlet at the top of the fine grid drying device, the top of the dust collector body is provided with an air outlet connected to the pulse dust collector, and the upper part of the dust collector body is provided with a discharge port connected to the side of the fine grid drying device; The lower part of the pulse dust collector is provided with an air inlet connected to the air outlet of the bag dust collector, and the upper part of the pulse dust collector is provided with an air outlet connected to the heating system of the fine grid drying device.

2. The secondary dust collector for a fine grid drying device according to claim 1, characterized in that: The air outlet of the bag dust collector is connected to the air inlet of the pulse dust collector through an air outlet pipe; the material outlet of the bag dust collector is connected to the side material inlet of the fine grid drying device through a side pipe.

3. The secondary dust collector for a fine grid drying device according to claim 1, characterized in that: The bag dust collector is installed above the fine grid drying device through a frame.

4. The secondary dust collector for a fine grid drying device according to claim 1, characterized in that: The pulse dust collector is also provided with a control panel and a pressure gauge.

Images