TWM580581U - High-performance sludge recycling treatment system - Google Patents

Abstract

A high performance sludge recycling treatment system includes a mixing unit, a granulation unit, and a firing unit. The mixing unit is used to mix the sludge and the additive to form a masterbatch mixture. A granulation unit is disposed at the downstream end of the mixing unit for receiving the masterbatch mixture from the mixing unit and granulating to form a green body. The firing unit preheats and calcinates the raw material, and finally obtains a light floc.

Description

High performance sludge resource treatment system

The present invention relates to a sludge recycling treatment system, and more particularly to a high performance sludge resource treatment system, which can make the reservoir sludge into a light plasmid material with high performance and high economic value.

The ceramic granules which are fired from clay, shale, slate, sludge and slag are called ceramsite, and Lightweight Aggregate is a general term for ceramsite used in engineering. It means that it is light and light. In general classification, the particle size is above 5 mm (#4 sieve), and the dry weight of the aggregate is not more than 1100 kg/m ³ . It is called lightweight coarse aggregate (according to Japanese JIS A5002 standard, aggregate particle specific gravity ≦ 2.0) If the particle size is less than 5 mm and the unit weight of the aggregate is not more than 1200 kg/m3, it is called a lightweight fine aggregate (the specific gravity of the aggregate is ≦2.3 according to the Japanese JIS A5002 standard). The following is a detailed description of the types and characteristics of light plasmids:

1. Types of light plasmids

Light plasmids can be roughly divided into two types:

a. Natural light flakes: Most of these light flakes are derived from volcanic magma eruptions. Among them, pumice, foam volcanic rocks, etc., which are widely used, can be applied as a simple crushing and sieving. .

b. Artificial light-weighted materials: The types of artificial light-weighted plasmids are quite complex and can be distinguished according to the nature of their raw materials, such as clay, slate, shale and zeolite, etc. from industrial or environmental sources. The waste is directly used or processed, such as bottom ash, blast furnace slag and sewage sludge, and is made into a light-grain material by heat treatment or cold junction curing.

The characteristics of light plasmids vary depending on the origin, raw materials and production methods. In general, the light weight effect of natural or artificial light plasmids is due to the large amount of pores inside and outside the light plasmid material, resulting in high water absorption, low density and low particle strength. And low unit weight and other characteristics, and as the size of the aggregate increases, its strength and density also decrease. The characteristics of the above light-weighted materials have a great influence on the performance of concrete. It can be said that the strength, unit weight, thermal insulation and durability of light-weighted concrete are mainly determined by the light-weight materials used. nature.

2. Shortcomings and limitations of the prior art:

Conventional artificial light-powder materials are still mostly made up of expanded shale and Expanded Clay, and the light-weighted materials fired from such materials are due to their inherent foaming mechanism and specific The production process usually makes the pore structure inside the aggregate poor. In addition to the problems of large pore size and uneven distribution, there are relatively many defects such as connected pores and cracks, so there is a large water absorption rate (24-hour aggregate). Normal pressure water absorption is generally greater than 12%).

From the point of view of on-site construction, such light-weighted plasmids with high water absorption are extremely unfavorable for the construction of concrete, transportation, pumping and pouring, and it is also very easy to cause the separation of concrete, resulting in durability of concrete. Reduced sex. On the other hand, the above-mentioned various unfavorable factors also make the research and development and application of high-performance light-grain concrete, which is more complicated and difficult than the high-performance concrete of constant heavy aggregate.

In order to cope with and solve the characteristics of the high water absorption rate of traditional light-weighted materials, many foreign experts and scholars have actively carried out research and development and transformation in recent years, hoping to produce high-intensity and low-level under the premise of maintaining certain light and light effects. High Performance Lightweight Aggregate (HPLWA) with water absorption. Among them, the research and development results in Japan are the most prominent, and are also implemented in practical applications and production, and its typical high-performance light-clay products such as Pacific Cement Co., Ltd. have low water absorption of 24 hours. At 5%, it can be mixed with lightweight concrete with a weight of 1800 kg/m ³ and a compressive strength of 40-60 MPa. According to the research report of the Japan Concrete Engineering Association, in order to improve the performance of light particles, it is necessary to improve the pore structure inside the light-weight material.

The pore structure of the light-weighted material can be divided into two types: connected pores and independent closed pores. The existence of connected pores will increase the water absorption rate of the aggregate and reduce the particle strength of the aggregate. Conversely, the addition of independent closed pores can help reduce the water absorption of the aggregate and obtain lightweight aggregates. At present, the development concept of high-performance light-weighted materials is to control the pore structure inside the aggregate by using suitable raw materials and by special processes such as doping or firing conditions. For example, to produce lightweight, high-strength and low-absorbent high-performance light-grain materials, it is necessary to reduce the connected pore content and simultaneously increase the spherical closed independent pores. The structure of the honeycomb-like structure can reduce the water absorption of the aggregate. In addition to the particle density, it also provides relatively high strength of the aggregate. However, there are still restrictions on the high-performance light-weight plasmids currently developed in Japan. The list is as follows:

(1). The main raw material needs to be taken from the mountains to remove the balance of the ecological environment.

The main raw material is acidic volcanic rock, acidic volcanic rock has rhyolite, coarse shale, etc. It is a pale volcanic rock, mostly white and pink, and its chemical composition is equivalent to that of granite. Because it is a rock mine, it needs to be taken by large mining machinery, and the collection cost is high. On the other hand, the collection of such rock mines usually requires the removal of mountains and stones, which will destroy the balance of the ecological environment. In addition, acidic volcanic rocks usually exist only in the area of the volcanic zone, and for other areas without volcanic zones, raw materials are not easy to obtain.

(2). High cost of processing before raw materials

In order to produce a high performance light particle material having a separate closed pore, the raw material is processed into a powder having a particle size of less than 7 micrometers (μm). Because of its use of acidic volcanic rock, it requires a large cost and equipment process to crush and grind the raw materials.

(3). High heat treatment temperature

Since the main raw material uses acidic volcanic rock ore, which is characterized by excellent fire resistance and heat resistance, it requires a large amount of heat energy (heat treatment temperature ≧1200 ° C) to make it melt and suitable for expansion to produce high performance and light weight. Pellet. On the other hand, although the addition of the fluxing component can be added to lower the heat treatment temperature, the effect is still limited, and the addition of the additive also leads to an increase in cost.

In view of the fact that the existing high-performance light-weight plasmids still have high production cost, the purpose of the present invention is to provide a high-performance sludge resource treatment system, which can utilize the reservoir sludge to make aggregates with independent closed pores inside, and A lightweight, high-strength and low-absorbent high-performance sludge light-weight pellet for use in pellets for light-grain concrete mixing.

In order to achieve the above object, an embodiment of the present high performance sludge recycling treatment system includes a mixing unit, a granulation unit, and a firing unit. The mixing unit is used to mix the sludge and the additive to form a masterbatch mixture. A granulation unit is disposed at a downstream end of the mixing unit for receiving the masterbatch mixture from the mixing unit and granulating to form a green body. The firing unit comprises at least a twin-tube rotary kiln and a monitoring device. The double-tube rotary kiln is formed by connecting the drying preheating kiln and the roasting kiln in a plugging manner, and the drying preheating kiln and the roasting kiln are independently provided with a temperature adjusting mechanism and a rotation speed adjusting mechanism; the drying a feed port of the preheating kiln is disposed at a downstream end of the granulation unit for receiving the raw material body from the granulation unit and performing first stage firing; the kiln receiving the kiln from the drying preheating kiln The raw material is granulated and subjected to the second stage firing to obtain a light floc; the monitoring device is electrically connected to the temperature adjusting mechanism and the rotation speed adjusting mechanism for detecting and controlling the drying preheating kiln And the temperature and rotation speed in the roasting kiln.

The specific abilities that this creation can achieve include:

1. The creation department mixes the sludge of the reservoir, the additive containing carbonized strontium, and the like according to the metering ratio, and adds the water to the raw material ball in the dry state, and then burns the light granules in the rotary kiln through the heat treatment process. Since the preferred embodiment of the present invention utilizes the rotary kiln system equipment, the raw material ball of the aqueous storage sludge and the additive is fired into an aggregate material which is internally filled with independent closed small pores by means of sintering and solidification, and thus is fired. The aggregate is a high performance silt-wafer material with light weight, high strength and low water absorption properties.

2. The creation is made of reservoir sludge, and since the temperature of the treatment does not need to be higher than 1200 ° C, the manufacturing cost can be greatly reduced, and the abandoned reservoir sludge can be effectively removed, and the reconstituted light plasmid material is also quite high. Economic benefits.

Referring to FIG. 1 and FIG. 2 , the present invention provides a high performance sludge resource treatment system, which mainly comprises a mixing unit 1, a filter unit 2, a drying unit 3, a granulation unit 4 and a firing unit 5.

The sludge as a raw material is mixed into a homogenized powder in the mixing unit 1. In the present embodiment, the mixing unit 1 may be a twin-shaft mixer, the sludge may be a reservoir sludge, and the reservoir sludge is reusable. Resource waste, the reservoir in Taiwan has more than 470 million cubic meters of silt, so the reservoir sludge has the advantages of a large amount and endless source. The reservoir sludge is developed to produce high-performance light-grain material, which can help the sludge. The sustainable use of the reservoir has great benefits for the national economy, people's livelihood and environmental protection. In addition, the reservoir sludge has a fine particle size, and the median diameter D _{50 is} about 3 to 5 micrometers (μm), which is free from mashing and grinding processes. It is made of high-performance silt light-grain material. Finally, the mixed reservoir sludge is placed in the silo to which it belongs, in order to wait for the subsequent mixing action, thereby homogenizing to ensure the homogeneity of the raw materials to ensure Finally, a light-weighted material with stable quality and excellent performance can be produced.

After mixing, the sludge and the additive and water are mixed into the mixing unit 1 to form a masterbatch mixture, and the additive containing cerium carbide has a foaming effect, and the mixing unit 1 may also be a flat-wing vortex type or a circular plate. A stirring device in the form of either a vortex type, a wedge-shaped airfoil, or a spiral type. In the present embodiment, the reservoir sludge accounts for 80 to 90% by weight of the non-aqueous portion of the mixture, and the additive accounts for 10 to 20% by weight of the non-aqueous portion of the mixture, and the mixed mixture is in a slurry form. The procedure of mixing ingredients can be transported to the twin-shaft mixer by conveyor belt, and the reservoir sludge and additives are metered by the electronic scale attached to the conveyor belt, and then mixed with water to homogenize by a double-shaft mixer, followed by pre-treatment of the granulation process. .

The slurry-like masterbatch mixture is sent to a filter unit 2, which is disposed at the downstream end of the mixing unit 1 for receiving the masterbatch mixture from the mixing unit 1, and press-filtering the masterbatch mixture to remove The majority of the water forms a pressure-filtered masterbatch mixture, and the mixture formed after the mixing and mixing is completed to filter the moisture to a moisture content of less than 35%. Preferably, the mixture is transported to the conveyor belt to the conveyor belt. The filter press performs pressure filtration and the water removed by the filter press is recycled and reused to implement a clean and environmentally friendly production.

The press-filtered masterbatch mixture is sent to a drying unit 3, which is disposed at the downstream end of the filter press unit 2 for receiving the filter-filtered mixture from the filter press unit 2, and drying the press-filtered mixture While a dry masterbatch mixture is formed, the dried masterbatch mixture is delivered to the granulation unit 4.

The granulation unit 4 is disposed at the downstream end of the drying unit 3 for receiving the masterbatch mixture from the mixing unit 1 and granulating to form a raw material body, and crushing the dried mixture to form a continuous grading 5~15 Millimeter-shaped green pellets; preferably, the mixture is crushed and granulated by a masher, and the hopper and the dust are recycled and reused, for example, the waste and the dust can be transported back to the mixture. Unit 1 is mixed with the additive and the sludge and the additive and water. The raw body is conveyed to a firing unit 5.

The firing unit 5 includes a double cylinder rotary kiln 51 and a monitoring device 52. The double cylinder rotary kiln 51 includes a drying preheating kiln 511 and a roasting kiln 512 which are connected in series by plugging, drying the preheating kiln 511 and the roasting kiln 512. The temperature adjustment mechanism and the rotation speed adjustment mechanism are separately provided, and the heating temperature of the drying preheating kiln 511 and the roasting kiln 512 and the rotation speed of the kiln body can be respectively controlled. For example, the temperature of the drying preheating kiln 511 can be in the range of 60 ^{o C} to 650 ^o. C, heated for 15 to 25 minutes or 20 to 35 minutes, and roasting kiln temperature range of 512 to 650 ^oC 1200 ^o C, heated 25 to 50 minutes.

The inlet of the drying preheating kiln 511 is disposed at the downstream end of the granulating unit 4 for receiving the raw material from the granulating unit 4 and performing the first stage firing, and the baking kiln 512 receives the drying preheating kiln. The raw pellets of 511 were subjected to a second stage of firing to obtain a light plasmid material, i.e., a light floc. The maximum kiln temperature is between 1100 ° C and 1200 ° C, which can be different according to different product requirements, and is fired according to the preset firing curve. The exhaust gas of the rotary kiln must be removed by air pollution control equipment. The treatment of sulfur dust collection can reach the national air pollution prevention standard, and the recovered dust obtained by desulfurization and dust collection can be reused for the production of light floc. The monitoring device 52 is electrically connected to the temperature adjusting mechanism and the rotational speed adjusting mechanism for detecting and controlling the temperature and the rotational speed in the drying preheating kiln and the roasting kiln.

The light material pellets fired by the firing unit 5 are sent to the cooling unit 6, and the fired lightweight pellets are cooled and annealed in the cooling unit 6; preferably, the lightweight pellets are cooled by the cooling unit. Cool and anneal according to the pre-set Xu cold curve.

The cooled lightweight pellets are sent to the screening unit 7, and classified and stored according to their unit weight and particle size, thereby becoming a finished product that can be sold at the factory.

The commercially available light flakes are compared to the high performance sludge light flakes prepared by the preferred embodiment of the present invention to observe their water absorption, density and strength properties, as shown in Table 1 below.

From the results of Table 1, it can be found that the high performance sludge light plasmid prepared by the preferred embodiment of the present invention has a water absorption rate lower than that of the commercially available conventional light plasmid, and is compatible with a commercially available high performance light plasmid. The close proximity of the material shows that the preferred example of the present invention can produce a high-performance silt light-grain material with low water absorption, which can improve the performance of lightweight concrete, and since it is made of reservoir sludge, the manufacturing cost can be greatly reduced.

In summary, the preferred embodiment of the present invention is capable of effectively removing waste sludge from the abandoned reservoir, and the reconstituted light-weight plasmid material can also obtain rich economic benefits, and is fully versatile for the people's livelihood, construction and environmental protection of the country. Positive meaning. However, the above description, drawings and expressions are one of the preferred embodiments of the present invention, and are not intended to limit the present invention, so that it is similar to the structure, device, and features of the present invention. All of them should be within the creation purpose and patent application scope of this new model. Therefore, the applicant filed an application for a new type of patent in accordance with the provisions of Article 19 of the Patent Law, and urged that the patent of the case be granted as soon as possible.

1‧‧‧mixing unit  2‧‧‧Pressure unit  3‧‧‧Drying unit  4‧‧‧granulation unit  5‧‧‧burning unit  6‧‧‧Cooling unit  7‧‧‧ screening unit  51‧‧‧Double-tube rotary kiln  52‧‧‧Monitor  511‧‧‧Drying preheating kiln  512‧‧‧ roasting kiln  

1 is a system block diagram of an embodiment of a high performance sludge recycling processing system of the present invention.

Figure 2 is a flow chart for making a light pellet material using the high performance sludge recycling system of the present invention.

Claims (10)

A high performance sludge resource treatment system comprising at least:  a mixing unit for mixing sludge and additives to form a masterbatch mixture;  a granulation unit disposed at a downstream end of the mixing unit for receiving the masterbatch mixture from the mixing unit and granulating to form a green body;  a firing unit comprising at least a twin-tube rotary kiln and a monitoring device;  The double-tube rotary kiln is formed by serially connecting the drying preheating kiln and the roasting kiln, and the drying preheating kiln and the roasting kiln are independently provided with a temperature adjusting mechanism and a rotation speed adjusting mechanism; The feed port of the intervention heat kiln is disposed at the downstream end of the granulation unit for receiving the raw material body from the granulation unit and performing the first stage firing; the kiln is received from the drying preheating kiln Raw granules and subjected to a second stage of firing to obtain a light granule;  The monitoring device is electrically connected to the temperature adjusting mechanism and the rotating speed adjusting mechanism for detecting and controlling the temperature and the rotational speed of the drying preheating kiln and the baking kiln.   The high performance sludge resource processing system of claim 1, which further comprises:  a filter press unit disposed at a downstream end of the mixing unit for receiving the masterbatch mixture from the mixing unit, and press-filtering the masterbatch mixture to remove most of the moisture to form a filter press Masterbatch mixture;  a drying unit disposed at a downstream end of the filter press unit for receiving the filter-filtered mixture from the filter press unit, and drying the press-filtered mixture to form a dried master batch mixture, The dried masterbatch mixture is delivered to the granulation unit.   The high performance sludge recycling treatment system of claim 2, wherein the pressure filtration unit is connected to the mixing unit, and the pressure filtered by the pressure filtration unit is sent to the mixing unit. The high-performance sludge recycling treatment system of claim 1, wherein the double-tube rotary kiln is further provided with an angle adjustment mechanism, and the angle adjustment mechanism is electrically connected to the monitoring device for adjusting the inclination of the double-tube rotary kiln. angle. The high-performance sludge resource treatment system of claim 1, wherein the drying preheating kiln and the roasting kiln are respectively provided with a gas regulating mechanism, and the gas regulating mechanisms are electrically connected to the monitoring device for detecting The drying preheating kiln and the gas composition ratio in the baking kiln are measured and adjusted. The high performance sludge recycling treatment system of claim 1, wherein the granulation unit comprises a masher, the masher receives the masterbatch mixture and pulverizes the masterbatch mixture to form a particle size of 5-20 Millimeter of grain. The high performance sludge recycling treatment system of claim 1, further comprising a cooling unit disposed at a downstream end of the firing unit for cooling the light particle material. The high performance sludge recycling treatment system of claim 1, wherein the additive comprises niobium carbide. The high performance sludge recycling treatment system according to claim 1, wherein the mixing unit is a stirring device in the form of a flat wing vortex type, a circular plate vortex type, a wedge-shaped air type, or a spiral type. The high performance sludge recycling processing system of claim 1, wherein the monitoring device is a microprocessor or a computer.