15:P Article ID: 1005 The utility model relates to the improvement of the wrong gas head on a vacuum filter machine for separation of solid and liquid phases of various specifications in the soda industry, which can not only improve the separation effect but also can Separation of mother liquor and the like, in particular, it is a multifunction vacuum head of a vacuum filter.
The soda industry is a large energy consumer. The vacuum filter is one of its mainframes. It is directly related to the energy consumption of the SHT and DS in the three energy-consuming devices. Although it has been improved many times in history, the fundamental structural principle of the wrong part of the key part has not changed ever since, and it is still an axial end face structure. Therefore, the solid phase moisture does not fall, resulting in energy consumption of the burning furnace. Large, for this reason, has been replaced by a centrifuge; the washing water in the liquid phase can not be separated from the mother liquor, so that the distillation tower load and energy consumption remain high for a long time. At the same time, due to washing water caused by filtration loss of about 2%, so that the conversion rate of the soda plant is difficult to reach more than 76%. However, its many advantages are still not available in other models. In particular, the model is commonly used at home and abroad, and the total fixed asset value is particularly large. Therefore, if it replaces the old one with a new one, there is no need for large investments to overcome its deficiencies.
The purpose of the utility model is to overcome and make up for the shortcomings and deficiencies of the existing vacuum filter, and to propose a new radial gas head structure principle of the wrong gas head to replace the old axial end dislocation structure. The principle of the wrong gas head, in order to obtain improved separation effect, the separation of washing water and mother liquor, and improve the conversion rate and other economic benefits.
The purpose of the utility model is achieved by the following technical scheme: setting a rotary body matching the filter drum axis of the host, and disassembling the old wrong gas head coaxial assembly and fixing it externally, and having the mother liquid vacuum, the washing water vacuum and the air blow Three nozzles are connected to the system. The blowhead assembly is composed of a sealing friction plate, a cover plate, four sets of springs and a blowpipe nozzle, and is mounted on the blower port of the housing so that the sealed friction plate is in close contact with the swing body and floats with the rotation of the swing body. The washing water separation assembly is composed of a frame-shaped sealing friction plate, a cover plate, four groups of springs and a wash water vacuum nozzle, and is mounted on the wash water vacuum port of the housing so that the sealing friction plate is in close contact with the rotating body, and the rotation The body sways and floats. The space formed between the housing and the swivel is sealed by a stuffing box. As a result, the whole is like a cantilever-type draught fan. The shell is fixed relative to the swivel without floating, and the closed circular work space is naturally divided into three parts and utilized to the maximum extent. In the same cycle, each part completes a function: the compressed air part of the air outlet is changed to the direct blowing mode, and the air blowing task is performed under the action of the sealing friction plate; the vacuum part of the washing water, the vacuum from the system, and the sealing friction plate Under the effect, complete the task of separation of washing water and mother liquor. The gas phase is introduced into the vacuum manifold and the liquid phase is recycled by a separate system such as a separation tank, a pipeline, a barrel, and a pump. The mother liquid vacuum port completes its main tasks of pre-suction, caustic soda, and dry-absorption under the action of vacuum, so that it is repeated.
The beneficial effects of the utility model are as follows: due to the structural principle that the radial peripheral surface is dislocated, the seal friction plate is not affected by axial turbulence and radial runout during operation, and is always in close contact with the rotary body. Reduce the vacuum loss 150 ~ 200mm threading column, so under comparable conditions, (crystallization, vacuum, after blowing with the associated helium and rotate with it. Volute static and end caps with the same pressure output and other factors) heavy alkali water content It can be reduced by more than 2% (or 25% ~ 35% for constant water production), thereby reducing the energy consumption of the calciner and increasing its production capacity.
Due to the new conditional condition plus washing water separation device, the washing water can be separated from the mother liquor, and the separation efficiency can reach more than 70%, thereby reducing the energy consumption of the distillation tower and increasing its production capacity.
The 2% filtration loss of the separated wash water enters the system for recovery, increasing the overall conversion.
In terms of machinery, the structure is simple, the manufacturing cost is low, the replacement is easy, and the maintenance workload is very small. The only one worn consumables sealing friction plate needs only to be replaced once every three years. Micro-wearing during operation, no corrosion, no lubrication, due to the close tightness of each friction, but also fundamentally overcome the old running, running, drip, leakage of the old hard problem.
An embodiment is described with reference to the drawings: In the housing (2), there is a rotating body (3) connected by a central coupling shaft (5) and positioning pins (6) and a filter drum shaft (4) in the housing (2) ) The blowout port assembly (9) and the washing water separation assembly (8) are respectively equipped with frictional sheets respectively in close contact with the rotating body (3), and the end cap (1) is joined with the shell (2) by bolts. Packing box (7) plus 20X 20mm PTFE packing connected to the housing (2).
This is a working procedure of the utility model on a 13m2 standard vacuum filter: When the drum shaft (4) rotates in the N direction, the rotating body (3) connected to the 24 working chambers at the end rotates accordingly. Like a fan rotor. The material is wear-resistant cast iron (MT-4). The housing (2), the end cap (1) and the stuffing box (7) are coaxially installed outside the rotating body (3) like a fan casing, fixed on the bracket, and formed with the rotating body (3) A closed circular work space is made of stainless steel. The mother liquid vacuum nozzle port (a) and the wash water vacuum nozzle port (b) are respectively connected to the respective separation tank and are connected to the vacuum manifold. Therefore, the working space is in a state of negative pressure at all times. Under the action of negative pressure, pre-absorption, caking, and dry-out procedures are repeated.
The blower assembly (9) installed under the housing (2) holds the rotating body (3) like a winch of the winch and does not put it under the action of the spring group and the seal friction sheet, and is tightly sealed by the system. The compressed air blown into the negative pressure space is filled with PTFE and the rest are all stainless steel.
The wash water separation assembly (8) installed above the housing (2), like a squid sucker, abuts against the working chamber of the swivel body (3), drawing wash water into another separation, storage, and circulation system.
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