CN201529403U - An energy-saving device for continuous evaporation of pentaerythritol - Google Patents

Abstract

An energy-saving device for continuous evaporation of pentaerythritol, comprising a primary evaporator 1, a falling film evaporator 2, a secondary evaporator 3, a circulating pump 4, a heater 5 and some necessary piping connections; the primary evaporator 1 The top of the falling film evaporator 2 and the secondary evaporator 3 are connected by a pipeline and a circulation pump 4, and valves are installed in the pipeline; the bottom of the falling film evaporator 2 is connected with the primary evaporator 1 by a pipeline, and the The heating medium inlet pipe is connected to the steam outlet pipe evaporated from the secondary evaporator 3; the secondary evaporator 3 is connected to the heater 5 through a pipe, and the heating medium inlet pipe on the heater 5 is connected to the secondary steam outlet pipe of the dealdehyde tower connect. The utility model can be used not only for the continuous evaporation of pentaerythritol, but also for the evaporation operation of other chemical equipment. It can quickly evaporate the water in the pentaerythritol condensation liquid, the evaporation residence time is short, the product color is good, and the low position of the dealdehyde tower can be fully utilized. The heat source greatly saves the consumption of steam.

Description

An energy-saving device for continuous evaporation of pentaerythritol

technical field

The utility model relates to an evaporation crystallization device used in the chemical production process, in particular to an energy-saving device for continuous evaporation of pentaerythritol.

Background technique

At present, the domestic traditional pentaerythritol evaporation often adopts two-stage evaporation, the first-stage evaporation uses the secondary steam of the dealdehyde tower, and the second-stage evaporation uses the primary steam. The traditional evaporation of pentaerythritol consumes more steam, and it cannot be operated continuously, and the operation is not stable.

Contents of the invention

The purpose of this utility model is to overcome the above-mentioned deficiencies of the prior art, and provide an energy-saving device for continuous evaporation of pentaerythritol, which can be used for the continuous evaporation of pentaerythritol, and can also be used for the evaporation operation of other chemical equipment, and has the advantages of saving steam consumption and the advantages of continuous operation.

The technical scheme of the utility model is: an energy-saving device for continuous evaporation of pentaerythritol, which includes a primary evaporator, a falling film evaporator, a secondary evaporator, a circulating pump, a heater and some necessary pipelines; The evaporator is connected to the top of the falling film evaporator and the secondary evaporator through pipelines and circulating pumps, and valves are installed in the pipelines; the bottom of the falling film evaporator is connected to the primary evaporator through pipelines, and the heating medium on it is imported The pipe is connected with the steam outlet pipe evaporated from the secondary evaporator; the secondary evaporator is connected with the heater through a pipe.

The further technical solution of the utility model is: the primary evaporator is connected to the top of the falling film evaporator through a pipeline and a circulating pump.

The further technical scheme of the utility model is: the heating medium inlet pipe on the heater is connected with the secondary steam outlet pipe of the dealdehyde tower.

The utility model can be used not only for the continuous evaporation of pentaerythritol, but also for the evaporation operation of other chemical equipments. It can quickly evaporate the water in the pentaerythritol condensation liquid, the evaporation residence time is short, the color of the product is good, and the advantages of the dealdehyde tower can be fully utilized. Low-level heat source greatly saves steam consumption. Compared with the existing technology, it has the following characteristics:

1. The utility model greatly improves the utilization efficiency of the low-level heat source, and adopts the falling film evaporator to effectively improve the heat transfer efficiency;

2. The utility model only needs a vacuum system, and the power consumption of the operation is reduced by 50%;

This combined device can realize the purpose of continuous evaporation and concentration.

3. The steam consumption per ton of pentaerythritol of the utility model is 1-1.5 tons lower than that of the traditional evaporation device.

The details of the present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

As shown in Figure 1: An energy-saving device for continuous evaporation of pentaerythritol, including a primary evaporator 1, a falling film evaporator 2, a secondary evaporator 3, a circulating pump 4, a heater 5 and some necessary pipelines connected The primary evaporator 1 is connected with the top of the falling film evaporator 2 and the secondary evaporator 3 through a pipeline and a circulation pump 4, and a valve is installed in the pipeline; the bottom of the falling film evaporator 2 is connected with the primary evaporator through a pipeline 1 connection, the heating medium inlet pipe on it is connected with the steam outlet pipe evaporated from the secondary evaporator 3; The secondary steam outlet pipe connection.

The working principle of the utility model is: the condensation liquid of high-temperature pentaerythritol from the bottom of the dealdehyde tower continuously enters the primary evaporator 1, and under the action of vacuum, the condensation liquid of high-temperature pentaerythritol flashes out part of the water in the primary evaporator 1 , the concentrated material is pumped to the top of the falling film evaporator 2 by the circulating pump 4, further heated and evaporated in the falling film evaporator 2, and the heating heat source of the falling film evaporator 2 is evaporated by the secondary evaporator 3 Provided by steam; after the concentration of the primary evaporator 1 meets the requirements, it is sent to the secondary evaporator 3 by the circulation pump 4, and the heat source of the secondary evaporator 3 is provided by the heater 5, and the steam of the heater 5 comes from the dealdehyde tower Secondary steam: When the specific gravity of the secondary evaporator 3 reaches 1.25-1.27, the concentrated material is continuously extracted from the bottom of the heater 5 and sent to the crystallization tank.

Claims (3)

1. An energy-saving device for the continuous evaporation of pentaerythritol is characterized in that it comprises a primary evaporator, a falling film evaporator, a secondary evaporator, a circulation pump, a heater and some necessary pipeline connections; the primary evaporator is formed by The pipeline and circulating pump are connected to the top of the falling film evaporator and the secondary evaporator, and valves are installed in the pipeline; the bottom of the falling film evaporator is connected to the primary evaporator through pipelines, and the heating medium inlet pipe on it is connected to the secondary evaporator. The steam outlet pipe from the primary evaporator is connected; the secondary evaporator is connected to the heater through a pipe. 2. The energy-saving device for continuous evaporation of pentaerythritol according to claim 1, characterized in that the primary evaporator is connected to the top of the falling film evaporator by a pipeline and a circulation pump. 3. The energy-saving device for continuous evaporation of pentaerythritol according to claim 1 or 2, characterized in that the heating medium inlet pipe on the heater is connected with the secondary steam outlet pipe of the dealdehyde tower.

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