Sludge drying pulse dust removal system

Abstract

The utility model discloses a pulse dust removal system for sludge drying. The pulse dust removal system comprises an air source assembly, an air storage bag, a pulse valve, a blowing main pipe, a nozzle branch pipe, an air nozzle and a dust removal filter cartridge, the plurality of dust removal filter cartridges are mounted in the sludge heat pump low-temperature drying system; an inlet of the gas storage bag is communicated with an outlet of the gas source assembly; an outlet of the gas storage bag is connected with one end of the blowing main pipe, and the other end of the blowing main pipe is closed; a plurality of nozzle branch pipes are arranged on the blowing main pipe; the nozzle branch pipes are communicated with the blowing main pipe; a pulse valve is mounted on the blowing main pipe and is used for controlling the on-off of compressed air; an air nozzle is arranged at the tail end of each nozzle branch pipe, and the air nozzles are located at the air outlet ends of the dust removal filter cartridges in a one-to-one correspondence mode, so that the airflow direction of compressed air sprayed out of the air nozzles is opposite to the airflow direction of dry hot air filtered by the dust removal filter cartridges, and reverse blowing of the dust removal filter cartridges is achieved; according to the utility model, high-efficiency filtration of the filter cartridge and pulse-type automatic ash removal of the filter cartridge can be realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of pulse dust removal, and in particular relates to a sludge drying pulse dust removal system. Background Art

[0002] During the low-temperature drying process of the sludge belt heat pump, the sludge dust generated by the sludge drying hot air circulation disturbance has a significant impact on the service life and heat exchange efficiency of the heat pump system and its components. At present, a dust removal system is generally used to isolate the drying room and the heat exchange chamber. The circulating hot air is cleaned and filtered through the dust removal system to reduce the impact of sludge dust on the equipment components in the heat exchange chamber.

[0003] At present, the dust removal system mainly adopts plate-type primary-efficiency filters and bag-type medium-efficiency filters, which have problems such as poor filtering effect, easy clogging, and inability to automatically clean dust. Utility Model Content

[0004] In view of this, the utility model provides a sludge drying pulse dust removal system, which can achieve high-efficiency filtration of the filter cartridge and pulse-type automatic dust cleaning of the filter cartridge.

[0005] The utility model is realized by the following technical solutions:

[0006] A sludge drying pulse dust removal system, comprising: an air source component, an air storage bag, a pulse valve, a spray main pipe, a nozzle branch pipe, an air nozzle and a dust removal filter cartridge;

[0007] A plurality of dust removal filter cartridges are arranged in parallel and installed in a sludge heat pump low-temperature drying system;

[0008] The air source component is used to provide compressed air;

[0009] The inlet of the air storage bag is connected to the outlet of the air source component to stabilize the injection pressure of the compressed air;

[0010] The outlet of the air storage bag is connected to one end of the injection pipe, and the other end of the injection pipe is closed; a plurality of nozzle branches are arranged on the injection pipe; the nozzle branches are connected to the injection pipe; the injection pipe and the nozzle branches are used to distribute compressed air; a pulse valve is installed on the injection pipe to control the on and off of compressed air;

[0011] An air nozzle is provided at the end of each nozzle branch pipe; the number of air nozzles is equal to the number of dust filter cartridges, and each air nozzle is located at the air outlet end of the dust filter cartridge in a one-to-one correspondence, so that the airflow direction of the compressed air sprayed by the air nozzle is opposite to the airflow direction of the dry hot air filtered by the dust filter cartridge, thereby realizing reverse blowing of the dust filter cartridge, and the airflow of the compressed air sprayed by the air nozzle can cover the inner cavity of the dust filter cartridge.

[0012] Furthermore, the dust filter cartridge is a cylindrical structure, and the cylinder wall of the cylindrical structure adopts a pleated filter material made of polyester fiber.

[0013] Furthermore, the air nozzle adopts an induction nozzle.

[0014] Furthermore, the air source assembly is a compressed air supply system consisting of an air compressor, an air filter, a dryer, an air storage tank and a safety valve;

[0015] Among them, the inlet of the air compressor is connected to the outside air, the inlet of the air filter is connected to the outlet of the air compressor, the outlet of the air filter is connected to the inlet of the dryer, the outlet of the dryer is connected to the inlet of the air tank, and the safety valve is installed on the air release pipeline of the air tank; compressed air is stored in the air tank; the inlet of the air storage bag is connected to the outlet pipeline of the air tank.

[0016] Furthermore, several dust filter cartridges are installed in the sludge heat pump low-temperature drying system through mounting brackets or partitions, and the mounting brackets or partitions will divide the sludge heat pump low-temperature drying system into two areas: a heat exchange chamber and a drying chamber; after the dry hot air dehumidifies the sludge in the drying chamber, it enters the heat exchange chamber through the dust filter cartridge; the dust filter cartridge is used to filter the dust mixed in the dry hot air.

[0017] Beneficial effects:

[0018] (1) The utility model proposes a pulse dust removal system suitable for the sludge heat pump low-temperature drying process. In view of the problem that flat-plate primary-efficiency filters and bag-type medium-efficiency filters are easy to clog and require manual cleaning, the pulse dust removal system of the utility model can realize the automatic cleaning function of the dust filter cartridge after dust accumulation, thereby improving the dust removal efficiency. At the same time, it can automatically clean the dust to reduce the labor intensity of operation and maintenance workers.

[0019] (2) The wall of the dust filter cartridge of the utility model adopts a pleated filter material made of polyester fiber. Compared with the existing flat-plate and bag-type filters, it can effectively increase the filtration area and save space. That is, the effective area is increased by 2 to 3 times, which effectively saves the internal space of the equipment and improves the filtration accuracy. At the same time, the pleated filter material can further reduce the blockage rate.

[0020] (3) The air nozzle of the utility model adopts an induction nozzle, which can significantly increase the reverse blowing intensity of the dust removal filter cartridge and improve the dust cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural composition diagram of the utility model;

[0022] Figure 2 (a) is a cross-sectional view of an existing dust filter cartridge using cylindrical filter material, and (b) is a cross-sectional view of a dust filter cartridge using pleated filter material of the present utility model;

[0023] Among them, 1-air source assembly, 2-air storage bag, 3-pulse valve, 4-blowing main pipe, 5-nozzle branch pipe, 6-air nozzle, 7-dust filter cartridge. DETAILED DESCRIPTION

[0024] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0025] This embodiment provides a sludge drying pulse dust removal system, see the attached Figure 1 , including: air source component 1, air storage bag 2, pulse valve 3, spray main pipe 4, nozzle branch pipe 5, air nozzle 6 and dust filter cartridge 7;

[0026] A plurality of the dust filter cartridges 7 are arranged in parallel and installed in the sludge heat pump low-temperature drying system through a mounting bracket or a partition, and the mounting bracket or the partition divides the sludge heat pump low-temperature drying system into two areas: a heat exchange chamber and a drying chamber; after the dry hot air dehumidifies the sludge in the drying chamber, it enters the heat exchange chamber through the dust filter cartridge 7; the dust filter cartridge 7 is used to filter the dust mixed in the dry hot air;

[0027] The air source assembly 1 is a compressed air supply system composed of an air compressor, an air filter, a dryer, an air storage tank and a safety valve, and is used to provide compressed air; wherein the inlet of the air compressor is connected to the outside air, the inlet of the air filter is connected to the outlet of the air compressor, the outlet of the air filter is connected to the inlet of the dryer, the outlet of the dryer is connected to the inlet of the air storage tank, and the safety valve is installed on the air release pipeline of the air storage tank; the air storage tank stores compressed air;

[0028] The inlet of the air storage bag 2 is connected to the outlet pipeline of the air storage tank to stabilize the injection pressure of the compressed air;

[0029] The outlet of the air storage bag 2 is connected to one end of the blowing main pipe 4, and the other end of the blowing main pipe 4 is closed; a plurality of nozzle branches 5 are arranged on the blowing main pipe 4; the nozzle branches 5 are communicated with the blowing main pipe 4; the blowing main pipe 4 and the nozzle branches 5 are used to distribute compressed air; a pulse valve 3 is installed on the blowing main pipe 4 to control the on and off of the compressed air;

[0030] An air nozzle 6 is provided at the end of each nozzle branch pipe 5; the number of air nozzles 6 is equal to the number of dust filter cartridges 7, and each air nozzle 6 is located at the air outlet end of the dust filter cartridge 7 in a one-to-one correspondence, so that the airflow direction of the compressed air sprayed by the air nozzle 6 is opposite to the airflow direction of the dry hot air filtered by the dust filter cartridge 7, so as to achieve reverse purge of the dust filter cartridge 7, and the airflow of the compressed air sprayed by the air nozzle 6 can cover the inner cavity of the dust filter cartridge 7; wherein, the spray main pipe 4 and the nozzle branch pipe 5 can be combined and adjusted according to the working conditions;

[0031] Among them, see Appendix Figure 2 The dust filter cartridge 7 is a cylindrical structure, and the cylindrical wall of the cylindrical structure adopts a pleated filter material made of polyester fiber, and the filtration area is increased by 2-3 times through multiple layers of pleats; the dust filter cartridge in this embodiment can also be replaced by a bag filter;

[0032] The air nozzle 6 adopts an induction nozzle, which can significantly increase the air intake of the dust filter cartridge 7 by inducing the air in the low-pressure area around the nozzle, while increasing the uniformity of blowing and covering the dust filter cartridge 7; the air nozzle 6 can select different types of nozzles according to different filter media and operating conditions.

[0033] Working principle: After the dry hot air dehumidifies the sludge in the drying chamber, it enters the heat exchange chamber through the dust filter cartridge 7 and circulates. In this process, the dust in the drying chamber is filtered and separated along with the dry hot air through the dust filter cartridge 7. The coarse and heavy dust particles are intercepted by the dust filter cartridge 7 and can settle naturally, while the light and fine particles adhere to the surface of the dust filter cartridge 7. When the dust is enriched to a certain extent, the pulse dust removal system is started, and the dust filter cartridge 7 is blown back by compressed air to achieve self-cleaning of the dust filter cartridge 7, so as to keep clean air flowing in the heat exchange chamber and the equipment is not affected by dust.

[0034] Among them, the pulse operation modes of the pulse dust removal system are as follows:

[0035] One is the time cycle control mode: according to the dust concentration and the blockage of the dust filter cartridge 7, the starting frequency of the pulse valve 3 is set. When the set time cycle is reached, the pulse valve 3 is automatically opened to perform reverse blowing and self-cleaning of the dust filter cartridge 7 to restore the filtering flux of the dust filter cartridge 7; when the present embodiment adopts multiple blowing main pipes 4 and corresponding multiple pulse valves 3, each pulse valve 3 is equipped with multiple dust filter cartridges 7, and the multiple pulse valves 3 are executed in sequence; this mode of operation control is simple and reliable.

[0036] The other is the pressure difference control operation mode: a pressure monitor is set between the inner cavity of the dust filter cartridge 7 and the external space of the dust filter cartridge 7. When the pressure difference between the inner and outer parts of the dust filter cartridge 7 reaches the set value, it indicates that the dust filter cartridge 7 is blocked to a critical point. At this time, the pulse valve 3 is started to reversely blow and self-clean the dust filter cartridge 7 to restore the filter flux of the filter cartridge. The operation control using the pressure difference method is more accurate and energy-saving, which can optimize the working frequency of the pulse dust removal system, reduce energy consumption, and is beneficial to extending the service life of various components in the pulse dust removal system.

[0037] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sludge drying pulse dust removal system, characterized in that: include: Air source components, air storage bag, pulse valve, spray main pipe, nozzle branch pipe, air nozzle and dust filter cartridge; A plurality of dust removal filter cartridges are arranged in parallel and installed in a sludge heat pump low-temperature drying system; The air source component is used to provide compressed air; The inlet of the air storage bag is connected to the outlet of the air source component to stabilize the injection pressure of the compressed air; The outlet of the air storage bag is connected to one end of the injection pipe, and the other end of the injection pipe is closed; a plurality of nozzle branches are arranged on the injection pipe; the nozzle branches are connected to the injection pipe; the injection pipe and the nozzle branches are used to distribute compressed air; a pulse valve is installed on the injection pipe to control the on and off of compressed air; An air nozzle is provided at the end of each nozzle branch pipe; the number of air nozzles is equal to the number of dust filter cartridges, and each air nozzle is located at the air outlet end of the dust filter cartridge in a one-to-one correspondence, so that the airflow direction of the compressed air sprayed by the air nozzle is opposite to the airflow direction of the dry hot air filtered by the dust filter cartridge, thereby realizing reverse blowing of the dust filter cartridge, and the airflow of the compressed air sprayed by the air nozzle can cover the inner cavity of the dust filter cartridge.

2. A sludge drying pulse dust removal system as claimed in claim 1, characterized in that: The dust removal filter cartridge is a cylindrical structure, and the cylinder wall of the cylindrical structure adopts a pleated filter material made of polyester fiber.

3. A sludge drying pulse dust removal system as claimed in claim 1, characterized in that: The air nozzle adopts an induction nozzle.

4. A sludge drying pulse dust removal system as claimed in claim 1, characterized in that: The air source assembly is a compressed air supply system consisting of an air compressor, an air filter, a dryer, an air storage tank and a safety valve; Among them, the inlet of the air compressor is connected to the outside air, the inlet of the air filter is connected to the outlet of the air compressor, the outlet of the air filter is connected to the inlet of the dryer, the outlet of the dryer is connected to the inlet of the air tank, and the safety valve is installed on the air release pipeline of the air tank; compressed air is stored in the air tank; the inlet of the air storage bag is connected to the outlet pipeline of the air tank.

5. A sludge drying pulse dust removal system according to any one of claims 1 to 4, characterized in that: Several dust filter cartridges are installed in the sludge heat pump low-temperature drying system through mounting brackets or partitions. The mounting brackets or partitions will divide the sludge heat pump low-temperature drying system into two areas: the heat exchange chamber and the drying chamber. After the dry hot air dehumidifies the sludge in the drying chamber, it enters the heat exchange chamber through the dust filter cartridge. The dust filter cartridge is used to filter the dust mixed in the dry hot air.

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