Condenser for polyurethane resin production

Abstract

The utility model discloses a condenser for polyurethane resin production, which comprises a reaction kettle body, the top of the reaction kettle body is connected with an air outlet pipe, one end of the air outlet pipe far away from the reaction kettle body is connected with a condenser, and the liquid outlet end of the condenser is connected with a liquid discharge pipe. A liquid return mechanism is arranged at the end, away from the condenser, of the liquid discharge pipe. According to the condenser for polyurethane resin production, high-temperature gas is condensed through the condenser, condensed water and solvent flow into the tank body through the arranged liquid return mechanism, the solvent floats on the water due to different specific gravities of the water and the solvent, and the floating ball can sink into the solvent and float on the water, so that the water and the solvent are separated from each other. A solvent flows into the reaction kettle body from the overflow pipe, water is left in the tank body, and after the water in the tank body is increased, the spring is compressed, and the water in the tank body is discharged from the drainage pipe, so that the concentration of the recovered solvent is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to polyurethane resin production technical field, especially a kind of condenser for polyurethane resin production. BACKGROUND

[0002] Polyurethane resin is the polymer of the main chain containing-NHCOO-repeating structural unit, English abbreviation is PU.Polyurethane resin is polymerized by isocyanate (monomer) and hydroxyl compound, due to containing strong polar urethane group, insoluble in nonpolar group, with good oil resistance, toughness, wear resistance, aging resistance and adhesion.Different raw materials can be used to obtain materials suitable for a wide temperature range (-50~150 DEG C), including elastomer, thermoplastic resin and thermosetting resin.High temperature is not resistant to hydrolysis, also not resistant to alkaline medium.

[0003] Polyurethane elastomer can be used as cylinder, conveyor belt, hose, automobile parts, sole, synthetic leather, wire and cable and medical artificial organ etc.;Soft foam is used for the cushion of vehicle, room, clothing, hard foam is used as heat insulation, sound absorption, packaging, insulation and low foaming synthetic wood, paint is used for high-grade vehicle, furniture, wood and metal protection, pool dam and building anti-seepage material, and fabric coating etc.Good adhesive force to metal, glass, ceramic, leather, fiber etc.In addition, polyurethane can be made into emulsion, magnetic material etc.

[0004] In the polymerization reaction of polyurethane resin, as the reaction proceeds, the temperature gradually rises, and the solvent in the reaction kettle will volatilize due to the temperature rise.In the prior art, a condenser is generally communicated at the top end of the reaction kettle, and the volatilized solvent is condensed and then refluxed back to the reaction kettle to continue participating in the reaction, so as to avoid the loss of the solvent.

[0005] In the prior art, after the reaction in the polyurethane resin reaction kettle, the solvent and part of the water directly reflux to the reaction kettle through the condenser;In this reflux process, the solvent and water are both refluxed to the reaction kettle, resulting in the decrease of the concentration of the solvent. UTILITY MODEL CONTENT

[0006] In view of the above problems in the prior art, the utility model provides a condenser for polyurethane resin production, which aims to solve the problems that after the reaction in the polyurethane resin reaction kettle, the solvent and part of the water directly reflux to the reaction kettle through the condenser;In this reflux process, the solvent and water are both refluxed to the reaction kettle, resulting in the decrease of the concentration of the solvent.

[0007] In order to achieve the above-mentioned utility model purposes, the technical scheme adopted by the utility model is as follows:

[0008] A condenser for polyurethane resin production, including a reactor body, the top of the reactor body is connected with a gas outlet pipe, the end of the gas outlet pipe away from the reactor body is connected with a condenser, the liquid outlet end of the condenser is connected with a liquid discharge pipe, the end of the liquid discharge pipe away from the condenser is provided with a liquid return mechanism;

[0009] The liquid return mechanism comprises a tank body in communication with the liquid discharge pipe, the top of the tank body is connected with an overflow pipe, a floating ball assembly is arranged in the tank body, a through hole is arranged in the bottom of the tank body, and a water discharge assembly is arranged in the bottom of the tank body.

[0010] Further, the end of the overflow pipe away from the tank body is in communication with the reactor body.

[0011] Further, the floating ball assembly comprises a first lug seat fixedly connected with the inner wall of the tank body, a second lug seat is hinged to the first lug seat, a connecting rod is fixedly connected with the second lug seat, and a floating ball is fixedly connected with the end of the connecting rod away from the second lug seat.

[0012] Further, the diameter of the floating ball is greater than the diameter of the overflow pipe.

[0013] Further, the water discharge assembly comprises a water discharge pipe fixedly connected with the tank body, first and second fixed plates are fixedly arranged in the water discharge pipe, drain holes are arranged on the first and second fixed plates, a spring is arranged on the top of the first fixed plate, and a baffle is arranged on the top of the spring.

[0014] Further, the baffle is made of rubber material.

[0015] The beneficial effects of the present application are as follows:

[0016] The condenser for polyurethane resin production condenses high-temperature gas through the condenser, and the condensed water and solvent flow into the tank body through the liquid return mechanism, due to the different specific gravities of water and solvent, the solvent floats on the water, the floating ball can sink in the solvent floating on the water, the solvent flows into the reactor body from the overflow pipe, and the water remains in the tank body, when the water in the tank body increases, the spring is compressed, the water in the tank body is discharged from the water discharge pipe, and the concentration of the recovered solvent is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a three-dimensional structure schematic view of the present application;

[0018] Figure 2 It is a cross-sectional structure schematic view of the liquid return mechanism of the present application;

[0019] Figure 3 It is a Figure 2 Enlarged structure schematic view of A in the present application.

[0020] Legend:

[0021] 1, reactor body; 2, gas outlet pipe; 3, condenser; 4, liquid discharge pipe; 5, tank body; 6, overflow pipe; 7, float assembly; 701, first lug; 702, second lug; 703, connecting rod; 704, float; 8, through hole; 9, drainage assembly; 901, drain pipe; 902, first fixed plate; 903, second fixed plate; 904, drainage hole; 905, spring; 906, baffle. DETAILED DESCRIPTION

[0022] The specific embodiments of the present application will be further described below with reference to the accompanying drawings. The same parts are denoted by the same reference numerals in the drawings.

[0023] It should be noted that the words "front", "back", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings, and the words "in" and "out" refer to the directions towards or away from the geometric center of a particular component.

[0024] In order to make the content of the present application more easily understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0025] As shown in Figures 1 to 3 A condenser for polyurethane resin production, comprising a reactor body 1, the top of the reactor body 1 is connected with a gas outlet pipe 2, the end of the gas outlet pipe 2 away from the reactor body 1 is connected with a condenser 3, the gas discharged from the reactor body 1 enters the condenser 3 through the gas outlet pipe 2, and the condenser 3 condenses the gas to liquefy the solvent and water in the gas into liquid.

[0026] The liquid outlet end of the condenser 3 is connected with a liquid discharge pipe 4, the end of the liquid discharge pipe 4 away from the condenser 3 is provided with a liquid return mechanism, the liquid return mechanism comprises a tank body 5 in communication with the liquid discharge pipe 4, and the liquefied liquid flows into the tank body 5.

[0027] The top of the tank body 5 is connected with an overflow pipe 6, the end of the overflow pipe 6 away from the tank body 5 is in communication with the reactor body 1, and the tank body 5 is provided with a float assembly 7, the float assembly 7 comprises a first lug 701 fixedly connected with the inner wall of the tank body 5, a second lug 702 hingedly connected on the first lug 701, a connecting rod 703 fixedly connected on the second lug 702, and a float 704 fixedly connected on the end of the connecting rod 703 away from the second lug 702, wherein the diameter of the float 704 is greater than the diameter of the overflow pipe 6.

[0028] Due to the different specific gravity of the solvent and water, the solvent floats on the water, the float ball 704 can sink into the solvent floating on the water, the solvent flows into the reaction kettle body 1 from the overflow pipe 6, and the water remains in the tank body 5, when the water in the tank body 5 increases, the float ball 704 blocks the overflow pipe 6, preventing water from entering the reaction kettle body 1.

[0029] The bottom of the tank body 5 is provided with a through hole 8, and the bottom of the tank body 5 is provided with a drainage assembly 9, which comprises a drainage pipe 901 fixedly connected with the tank body 5, a first fixed plate 902 and a second fixed plate 903 fixedly arranged in the drainage pipe 901, and water draining holes 904 arranged on the first fixed plate 902 and the second fixed plate 903.

[0030] When the water in the tank body 5 increases, the spring 905 is compressed, the water is discharged from the tank body 5 through the water draining holes 904, and when the water in the tank body 5 decreases, the baffle 906 blocks the water draining holes 904 on the second fixed plate 903, so that the water can be automatically drained.

[0031] The above is only a preferred embodiment of the present application, and is not intended to limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A condenser for polyurethane resin production comprising a reactor vessel body (1), characterized in that, The reaction kettle body (1) top is connected with the gas outlet pipe (2), the gas outlet pipe (2) is connected with the condenser (3) away from the reaction kettle body (1) one end, the condenser (3) liquid outlet is connected with the drain pipe (4), the drain pipe (4) is away from the condenser (3) one end is provided with back liquid mechanism; The back liquid mechanism includes the tank (5) in communication with the drain pipe (4), the tank (5) top is connected with the overflow pipe (6), the tank (5) is provided with the ball assembly (7), the tank (5) bottom is provided with through-hole (8), the tank (5) bottom is provided with drainage assembly (9); The ball assembly (7) includes the first lug (701) fixedly connected with the inner wall of the tank (5), the first lug (701) is hinged with the second lug (702), the second lug (702) is fixedly connected with the connecting rod (703), the connecting rod (703) is fixedly connected with the float (704) away from the second lug (702) one end; The drainage assembly (9) includes the drain pipe (901) fixedly connected with the tank (5), the first fixed plate (902) and the second fixed plate (903) are fixedly arranged in the drain pipe (901), the first fixed plate (902) and the second fixed plate (903) are all provided with the drainage hole (904), the first fixed plate (902) top is provided with spring (905), the spring (905) top is provided with baffle (906).

2. A condenser for polyurethane resin production according to claim 1, characterized in that: The overflow pipe (6) is away from the tank (5) one end and the reaction kettle body (1) are communicated.

3. A condenser for polyurethane resin production according to claim 1, characterized in that: The diameter of the float (704) is greater than the diameter of the overflow pipe (6).

4. A condenser for polyurethane resin production according to claim 1, characterized in that: The baffle (906) is made of rubber material.

Images