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CN-224215886-U - Soft bubble polyether polyol reation kettle vacuum unit

CN224215886UCN 224215886 UCN224215886 UCN 224215886UCN-224215886-U

Abstract

The utility model relates to the technical field of soft foam polyether polyol processing production, in particular to a soft foam polyether polyol reaction kettle vacuum unit which comprises a reaction kettle main body, wherein an initiator input pipe is arranged at the top end of the reaction kettle main body, a propylene oxide input pipe is arranged on one side of the initiator input pipe, a vacuum pipeline is arranged on one side of the propylene oxide input pipe, the vacuum pipeline is connected with a vacuum buffer tank, the vacuum buffer tank is connected with a Roots pump input port, an output port of the Roots pump is connected with a liquid ring pump, an output port of the liquid ring pump is connected with a spiral heat exchange component, an output port of the spiral heat exchange component is connected with a high-temperature storage tank, an output port of the high-temperature storage tank is connected with a circulating pump, and an output port of the circulating pump is provided with a connecting pipe.

Inventors

  • WANG GUOBIN
  • SUN MINGYONG
  • CHEN ZENGYUAN
  • ZHANG YIWEI

Assignees

  • 中化东大(泉州)有限公司

Dates

Publication Date
20260508
Application Date
20250519

Claims (6)

  1. 1. A soft foam polyether polyol reaction kettle vacuum unit comprises a reaction kettle main body (1) and is characterized in that an initiator input pipe (101) is arranged at the top end of the reaction kettle main body (1), a propylene oxide input pipe (102) is arranged on one side of the initiator input pipe (101), a vacuum pipeline (103) is arranged on one side of the propylene oxide input pipe (102), the vacuum pipeline (103) is connected with a vacuum buffer tank (104), the vacuum buffer tank (104) is connected with an input port of a Roots pump (105), an output port of the Roots pump (105) is connected with a liquid ring pump (106), an output port of the liquid ring pump (106) is connected with a spiral heat exchange component (2), an output port of the spiral heat exchange component (2) is connected with a high-temperature storage tank (107), an output port of the high-temperature storage tank (107) is connected with a circulating pump (108), and an output port of the circulating pump (108) is provided with a connecting pipe (109); The spiral heat exchange assembly (2) comprises a guide pipe (201), a spiral pipe (202) is arranged in the guide pipe (201), one end of the spiral pipe (202) is connected with an output port of the liquid ring pump (106), a liquid inlet pipe (203) is arranged on the guide pipe (201), and a liquid outlet pipe (204) is arranged on the guide pipe (201).
  2. 2. The vacuum unit of the soft foam polyether polyol reaction kettle is characterized in that the vacuum pipeline (103) is made of 316L stainless steel, the inner wall of the vacuum pipeline is subjected to electrolytic polishing treatment, the outer wall of the vacuum pipeline is coated with a polyurethane heat-insulating layer, a charging port is arranged at the top of the reaction kettle main body (1), one-way valves are respectively arranged on output ports of the connecting pipe (109), the liquid outlet pipe (204) and the high-temperature storage tank (107), and one side of each one-way valve is provided with an electromagnetic valve.
  3. 3. The vacuum unit of a soft foam polyether polyol reaction kettle according to claim 1, wherein the connecting pipe (109) is spirally wound around the connecting pipe along the height direction of the propylene oxide input pipe (102).
  4. 4. The vacuum unit of the soft foam polyether polyol reaction kettle according to claim 1, wherein one end of the connecting pipe (109) is connected with an output port of the circulating pump (108), the other end of the connecting pipe (109) is connected with the liquid inlet pipe (203), and a leakage-proof sealing gasket is arranged at the interface of the liquid inlet pipe (203) and the spiral pipe (202).
  5. 5. The vacuum unit of the soft foam polyether polyol reaction kettle is characterized in that a detachable filter element is arranged at the top of the vacuum buffer tank (104) through bolts, and the filter element is made of sintered stainless steel.
  6. 6. The vacuum unit of the soft foam polyether polyol reaction kettle according to claim 1, wherein a ceramic coating is arranged on the inner wall of the high-temperature storage tank (107), and a rock wool heat preservation layer is wrapped on the outer layer.

Description

Soft bubble polyether polyol reation kettle vacuum unit Technical Field The utility model relates to the technical field of soft foam polyether polyol processing production, in particular to a soft foam polyether polyol reaction kettle vacuum unit. Background The soft foam polyether polyol is a key chemical raw material and is mainly used for producing polyurethane soft foam (such as sofa cushion, mattress, automobile seat and the like). It is formed by polymerizing Propylene Oxide (PO) or Ethylene Oxide (EO) and initiator (such as glycerin and sucrose) under the action of catalyst, and the molecular chain contains multiple hydroxyl (-OH) groups, and can react with isocyanate to produce polyurethane. The polyurethane foam material has the characteristics of high molecular weight, low viscosity and moderate reactivity, and is endowed with softness and elasticity, and is a core raw material for producing flexible polyurethane foam. The waste gas and waste heat recovery rate of the traditional vacuum unit is low, a preheating mechanism for raw materials is lacked, and the energy waste is serious. Therefore, it is important to design a vacuum unit of a soft foam polyether polyol reaction kettle to improve the whole practicality by changing the technical defects. Disclosure of utility model The utility model aims to provide a soft foam polyether polyol reaction kettle vacuum unit to solve the problems in the background technology. In order to achieve the above purpose, the present utility model provides the following technical solutions: The soft foam polyether polyol reaction kettle vacuum unit comprises a reaction kettle main body, wherein an initiator input pipe is arranged at the top end of the reaction kettle main body, one side of the initiator input pipe is provided with a propylene oxide input pipe, one side of the propylene oxide input pipe is provided with a vacuum pipeline, the vacuum pipeline is connected with a vacuum buffer tank, the vacuum buffer tank is connected with a Roots pump input port, an output port of the Roots pump is connected with a liquid ring pump, an output port of the liquid ring pump is connected with a spiral heat exchange assembly, an output port of the spiral heat exchange assembly is connected with a high-temperature storage tank, an output port of the high-temperature storage tank is connected with a circulating pump, and an output port of the circulating pump is provided with a connecting pipe; the spiral heat exchange assembly comprises a guide pipe, a spiral pipe is arranged in the guide pipe, one end of the spiral pipe is connected with an output port of the liquid ring pump, a liquid inlet pipe is arranged on the guide pipe, and a liquid outlet pipe is arranged on the guide pipe. As a preferable scheme of the utility model, the vacuum pipeline is made of L stainless steel, the inner wall of the vacuum pipeline is subjected to electrolytic polishing treatment, the outer wall of the vacuum pipeline is coated with a polyurethane heat-insulating layer, the top of the reaction kettle main body is provided with a feed inlet, the output ports of the connecting pipe, the liquid outlet pipe and the high-temperature storage tank are respectively provided with a one-way valve, and one side of the one-way valve is provided with an electromagnetic valve. As a preferred embodiment of the present utility model, the connection pipe is spirally wound around the outside thereof in the height direction of the propylene oxide inlet pipe. As a preferable scheme of the utility model, one end of the connecting pipe is connected with an output port of the circulating pump, the other end of the connecting pipe is connected with the liquid inlet pipe, and a leakage-proof sealing gasket is arranged at the interface of the liquid inlet pipe and the spiral pipe. As a preferable scheme of the utility model, a detachable filter element is arranged at the top of the vacuum buffer tank through bolts, and the filter element is made of sintered stainless steel. As a preferable scheme of the utility model, the inner wall of the high-temperature storage tank is provided with a ceramic coating, and the outer layer is wrapped with a rock wool heat-insulating layer. Compared with the prior art, the utility model has the beneficial effects that: 1. According to the utility model, through the structure of the spiral pipe, the liquid inlet pipe, the liquid outlet pipe, the high-temperature storage tank, the circulating pump and the connecting pipe, the initiator and the propylene oxide respectively enter the reaction kettle through the input pipe and are polymerized under the action of the catalyst, reaction byproducts and unreacted gas are pumped to the buffer tank through the corrosion-resistant vacuum pipeline, filtered by the sintered stainless steel filter core, and then are serially compressed by the Roots pump-liquid ring pump to enter the spiral heat exchange assembly, the liquid ring pump discharges hig