Hydrazine hydrochloride and hydrazine hydrate recovery device and methylhydrazine production equipment

Abstract

The utility model belongs to the technical field of chemical equipment, and particularly relates to a hydrazine hydrochloride and hydrazine hydrate recovery device and methylhydrazine production equipment, which comprise a film evaporator, a discharge pipe at the bottom end of the film evaporator is connected with a hydrazine hydrochloride purification tank, and a two-stage serial condenser is connected behind an air outlet pipe at the upper part of one side of the film evaporator. The bottom end of the first-stage condenser is connected with a hydrazine hydrate recovery tank, an air outlet pipe of the first-stage condenser is in butt joint with an air inlet pipe of the second-stage condenser, and the bottom end of the second-stage condenser is connected with a mixture collection tank. According to the device, hydrazine hydrochloride and hydrazine hydrate can be purified more accurately, the requirement of secondary purification is reduced, a high-quality mechanically-applied raw material is provided for production of methylhydrazine, the production cost is remarkably reduced, meanwhile, the stability and the safety of a gas-liquid separation process are ensured, and the quality and the recovery efficiency of a product are further improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of chemical equipment, specifically relates to a hydrazine hydrochloride and hydrazine hydrate recovery device and methylhydrazine production equipment. BACKGROUND

[0002] The scraper film evaporator is widely used in the fields of chemical industry, medicine and the like as a kind of efficient and energy-saving evaporation equipment, and its working principle is that the motor drives the rotating shaft and scraper to rotate, so that the raw material liquid forms a film on the inner wall of the evaporator cylinder, and the film is heated by the heating jacket, thereby realizing rapid evaporation, especially suitable for evaporation and concentration of heat-sensitive substances and viscous materials, and having the advantages of high heat transfer efficiency, fast evaporation speed and short material residence time. However, the current scraper film evaporator is prone to insufficient gas-liquid separation, so that the separated liquid often carries part of other materials, resulting in a decrease in product quality. In order to ensure product quality, a secondary purification process is required, thereby increasing production cost.

[0003] There are studies in the prior art to improve the gas-liquid separation effect of the scraper film evaporator, such as patent application CN208525846U - a high-efficiency rotary film evaporator, which improves the gas-liquid separation effect by increasing the filtering device and optimizing the condenser, solves the problem that the liquid separated by the current scraper film evaporator carries part of other materials, resulting in a decrease in product quality and the need for secondary purification. However, although the existing high-efficiency rotary film evaporator improves the purity of the extracted product, it is difficult to effectively control the separation and purification of hydrazine hydrochloride and hydrazine hydrate in the production process of methylhydrazine, making it difficult to effectively use hydrazine hydrochloride and hydrazine hydrate, thereby affecting the production cost and product quality of methylhydrazine. Therefore, a new technical solution is needed to solve the above technical problems. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a hydrazine hydrochloride and hydrazine hydrate recovery device and methylhydrazine production equipment to solve the problem that the current high-efficiency rotary film evaporator is difficult to effectively control the separation and purification of hydrazine hydrochloride and hydrazine hydrate in the production process of methylhydrazine, making it difficult to effectively use hydrazine hydrochloride and hydrazine hydrate, thereby affecting the production cost and product quality of methylhydrazine.

[0005] In order to achieve the above object, the utility model provides the following technical scheme: a hydrazine hydrochloride and hydrazine hydrate recovery device, including the membrane evaporator, the top of membrane evaporator is fixedly connected with motor through flange, the output of motor is rotatably connected with scraper assembly, the scraper assembly is suspended and rotates in the inside of membrane evaporator through motor, the discharge pipe of membrane evaporator bottom is connected with hydrazine hydrochloride purification tank, the gas outlet pipe of membrane evaporator one side upper portion is connected with two stage series connection's condenser, the bottom of first stage condenser is connected with hydrazine hydrate recovery tank and its gas outlet pipe and the gas inlet pipe of second stage condenser butt joint and set, the bottom of second stage condenser is connected with mixture collection tank, the other side of membrane evaporator is connected with feed pipe, hot medium outlet pipe and hot medium import pipe in turn from top to bottom.

[0006] Further, the feed pipe of the hydrazine hydrochloride purification tank top is fixedly connected with the discharge pipe of the membrane evaporator bottom through flange; the discharge valve A is installed on the discharge pipe of the hydrazine hydrochloride purification tank bottom, and the flow regulating valve is installed on the steam pipe of the upper side of the hydrazine hydrochloride purification tank, and the steam generator is connected through the flow regulating valve.

[0007] Further, the gas outlet pipe of the upper side of the membrane evaporator is fixedly connected with the gas inlet pipe of the upper end of the one side of the first stage condenser through flange, the gas inlet pipe of the first stage condenser is connected with the temperature measuring tube, and the temperature probe is placed in the temperature measuring tube; the gas outlet pipe of the other side of the lower end of the first stage condenser is fixedly connected with the gas inlet pipe of the lower end of the one side of the second stage condenser through flange, and the vacuum pump is connected with the vacuum pipe of the other side of the upper part of the second stage condenser; the vacuum degree measuring tube is connected with the vacuum pipe, and the vacuum degree probe is placed in the vacuum degree measuring tube.

[0008] Further, the feed pipe of the hydrazine hydrate recovery tank top is fixedly connected with the discharge pipe of the bottom of the first stage condenser through flange, and the discharge valve B is installed on the discharge pipe of the bottom of the hydrazine hydrate recovery tank.

[0009] Further, the feed pipe of the hydrazine hydrate recovery tank top is fixedly connected with the discharge pipe of the bottom of the first stage condenser through flange, and the discharge valve B is installed on the discharge pipe of the bottom of the hydrazine hydrate recovery tank.

[0010] In addition to the above technical scheme, there is a methylhydrazine production equipment with the hydrazine hydrochloride and hydrazine hydrate recovery device, the discharge pipes of the hydrazine hydrochloride purification tank and the hydrazine hydrate recovery tank are connected and arranged at the front end of the methylhydrazine production equipment, and the rear end of the methylhydrazine production equipment is connected with the feed pipe of the membrane evaporator.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] 1. The utility model discloses a thin film evaporator's bottom end and rear end are connected with hydrazine hydrochloride purification tank and two-stage series condenser design respectively, not only optimize the process of gas-liquid separation, but also realize the accurate separation of different boiling point substances, make hydrazine hydrochloride in thin film evaporation can be recycled, and hydrazine hydrate is recycled at the first stage condenser, and the second stage condenser further processes the remaining mixture, ensures that different components can be effectively separated, not only improves the efficiency of gas-liquid separation, but also helps to reduce the mutual pollution between materials, ensures the purity of the recovered product, so that the purification of hydrazine hydrochloride and hydrazine hydrate is more accurate, reduces the demand of secondary purification, provides high-quality used raw materials for the production of methylhydrazine, significantly reduces the production cost, and also effectively improves the final product quality.

[0013] 2. The utility model discloses a flow regulating valve is installed on the steam pipe of hydrazine hydrochloride purification tank and is connected with the steam generator design, is helpful to the operator according to actual demand adjustment purification process, through the temperature measuring tube that has built -in temperature probe and vacuum pipe that has built -in vacuum degree probe of connecting inside temperature measuring tube of the air inlet pipe of first stage condenser design, realizes the real -time accurate control of gas-liquid separation process, not only helps timely adjustment operation parameter to optimize the separation effect, ensures that the gas-liquid separation effect reaches the best state, also ensures the stability and safety of gas-liquid separation process, further improves the quality and recovery efficiency of product.

[0014] 3. The utility model discloses the independent design of hydrazine hydrochloride purification tank and hydrazine hydrate recovery tank, not only convenient operation and maintenance, also provides great flexibility for subsequent production process, makes the whole recovery process more compact, efficient, through the butt joint of hydrazine hydrochloride purification tank and hydrazine hydrate recovery tank and methylhydrazine production equipment, forms closed loop production process, effectively improves the overall flexibility and automation level of production line, through the recycling of purified hydrazine hydrochloride and hydrazine hydrate, further reduces the production cost of methylhydrazine, improves the overall production efficiency, also effectively improves the utilization rate of resources, reduces the discharge of waste, meets the concept of green production.

[0015] 4. The utility model discloses a hydrazine hydrochloride and hydrazine hydrate recovery device compact structure, the mode of fixing through flange connection between each component, convenient to dismount and replace, not only improves the reliability and durability of equipment, also reduces the maintenance cost, makes the operator can more easily manage the whole production process, through keeping the evaporation process under higher vacuum condition, reduces the evaporation temperature of material, thereby reduces energy consumption and environmental pollution, through improving the recovery rate and purity of hydrazine hydrochloride and hydrazine hydrate, not only reduces the production cost of methylhydrazine, also promotes the market competitiveness of product. ACCURACY

[0016] Figure 1 It is the whole structure schematic view of the utility model.

[0017] Figure 2 For Figure 1 Structure diagram of the thin film evaporator;

[0018] Figure 3 For Figure 1 Structure diagram of the two-stage condenser in series;

[0019] Figure 4 For Figure 3 Structure diagram of the first-stage condenser;

[0020] Figure 5 For Figure 3 Structure diagram of the second-stage condenser.

[0021] Wherein: 1, thin film evaporator; 101, jacket; 2, motor; 3, scraper assembly; 4, hydrazine hydrochloride purification tank; 5, first-stage condenser; 6, hydrazine hydrate recovery tank; 7, second-stage condenser; 8, mixture collection tank; 9, feed pipe; 10, hot medium outlet pipe; 11, hot medium inlet pipe; 12, discharge valve A; 13, flow regulating valve; 14, temperature measuring pipe; 15, temperature probe; 16, vacuum degree measuring pipe; 17, vacuum degree probe; 18, discharge valve B; 19, discharge valve C. DETAILED DESCRIPTION

[0022] The following examples are used to further illustrate the content of the present application, and do not limit the application of the present application. Example 1:

[0023] Please refer to Figures 1-5The embodiment provides a hydrazine hydrochloride and hydrazine hydrate recovery device, which comprises a thin film evaporator 1 for evaporation concentration, a motor 2 for driving a scraper assembly to rotate is fixedly connected to the top end of the thin film evaporator 1 through a flange, the output end of the motor 2 is rotationally connected with a scraper assembly 3 for stirring, the scraper assembly 3 is suspendedly rotated in the internal of the thin film evaporator 1 through the motor 2, so that materials form a thin film on the inner wall surface of the thin film evaporator 1 under the rotation and stirring of the scraper assembly 3, the thin film is discharged from the bottom end of the thin film evaporator 1 after being sufficiently evaporated and dried, a hydrazine hydrochloride purification tank 4 for recovering hydrazine hydrochloride is connected to the discharge pipe at the bottom end of the thin film evaporator 1, a two-stage series-connected condenser for gas-liquid separation is connected to the gas outlet pipe of the upper part of the thin film evaporator 1, a hydrazine hydrate recovery tank 6 for recovering hydrazine hydrate is connected to the bottom end of the first-stage condenser 5, and the gas outlet pipe of the hydrazine hydrate recovery tank 6 is in butt joint with the gas inlet pipe of the second-stage condenser 7, the bottom end of the second-stage condenser 7 is connected with a mixture collecting tank 8 for remaining mixture, and the feed pipe 9, the hot medium outlet pipe 10 and the hot medium inlet pipe 11 are sequentially connected to the other side of the thin film evaporator 1 from top to bottom, the feed pipe 9 is connected with a liquid storage tank (the functions and structures of the liquid storage tank and other conventional devices are known in the art, and the connection setting is also common knowledge, so no further description is made here, and the liquid storage tank is not shown in the drawings), the liquid storage tank stores free methylhydrazine reaction liquid (the methylhydrazine reaction liquid contains hydrazine hydrochloride, hydrazine hydrate, methylhydrazine, methanol and the like) and filters the methylhydrazine reaction liquid, then the methylhydrazine reaction liquid is transported into the thin film evaporator 1 through the feed pipe 9 by a feed pump (the functions and structures of the feed pump and other conventional devices are known in the art, and the connection setting is also common knowledge, so no further description is made here, and the feed pump is not shown in the drawings), and the hot medium outlet pipe 10 and the hot medium inlet pipe 11 are connected with a hot medium storage tank (the functions and structures of the hot medium storage tank and other conventional devices are known in the art, and the connection setting is also common knowledge, so no further description is made here, and the hot medium storage tank is not shown in the drawings), the hot medium in the hot medium storage tank enters the jacket 101 of the thin film evaporator 1 through the hot medium inlet pipe 11 (the hot medium of the device can be heat conducting oil).

[0024] Please refer to Figures 1-2 The feed pipe at the top end of the hydrazine hydrochloride purification tank 4 is fixedly connected with the discharge pipe at the bottom end of the thin film evaporator 1 through a flange.

[0025] A discharge valve A12 for discharging is mounted on the discharge pipe at the bottom end of the hydrazine hydrochloride purification tank 4, and a flow regulating valve 13 for adjusting is mounted on the steam pipe at the upper side of the discharge valve A12, and a steam generator is connected with the flow regulating valve 13 (the functions and structures of the steam generator and other conventional devices are known in the art, and the connection setting is also common knowledge, so no further description is made here, and the steam generator is not shown in the drawings).

[0026] Please refer to Figure 1 and Figure 3The gas outlet pipe of the upper side of the thin film evaporator 1 is fixedly connected with the gas inlet pipe of the upper end of one side of the first stage condenser 5 through flanges, a temperature measuring pipe 14 is connected with the gas inlet pipe of the first stage condenser 5, and a temperature probe 15 for temperature measurement is arranged in the temperature measuring pipe 14;

[0027] The gas outlet pipe of the lower end of the other side of the first stage condenser 5 is fixedly connected with the gas inlet pipe of the lower end of one side of the second stage condenser 7 through flanges, a vacuum pipe connected with a vacuum pump (the functions and structures of conventional devices such as the vacuum pump are known in the art, and the connection setting is also common knowledge, so no further description is made here, and the vacuum pump is not shown in the drawings) for vacuumizing is connected with the upper end of the other side of the second stage condenser 7, and a vacuum degree measuring pipe 16 is connected with the vacuum pipe, and a vacuum degree probe 17 for monitoring the vacuum degree is arranged in the vacuum degree measuring pipe 16.

[0028] Please refer to Figure 4 The feed pipe of the top end of the hydrazine hydrate recovery tank 6 is fixedly connected with the discharge pipe of the bottom end of the first stage condenser 5 through flanges, and a discharge valve B18 for discharging is arranged on the discharge pipe of the bottom end.

[0029] Please refer to Figure 5 The feed pipe of the top end of the mixture collection tank 8 is fixedly connected with the discharge pipe of the bottom end of the second stage condenser 7 through flanges, and a discharge valve C19 for discharging is arranged on the discharge pipe of the bottom end.

[0030] The working principle and use process of the utility model are as follows: Figures 1-5 After the hydrazine hydrochloride and hydrazine hydrate recovery device is assembled, the operator installs the device on the methylhydrazine production equipment (the functions and structures of conventional devices such as the methylhydrazine production equipment are known in the art, and the connection setting is also common knowledge, so no further description is made here, and the methylhydrazine production equipment is not shown in the drawings), that is, the discharge pipe of the hydrazine hydrochloride purification tank 4 and the discharge pipe of the hydrazine hydrate recovery tank 6 are both connected with the front end of the methylhydrazine production equipment, and the liquid storage tank for storing free methylhydrazine reaction liquid at the rear end of the methylhydrazine production equipment is connected with the feed pipe 9 of the thin film evaporator 1, so that the purification of hydrazine hydrochloride and hydrazine hydrate is more accurate, the demand for secondary purification is reduced, high-quality raw materials are provided for the production of methylhydrazine, the production cost is significantly reduced, and the final product quality is effectively improved.

[0031] When it is necessary to recycle hydrazine hydrochloride and hydrazine hydrate, the operator first connects the thin film evaporator 1 to the output channel of the storage tank containing the free post-methylhydrazine reaction solution at the rear end of the methylhydrazine production device through the feed pipe 9, so that the methylhydrazine reaction solution containing hydrazine hydrochloride, hydrazine hydrate, methylhydrazine, and methanol can be transported by the feed pump to the preheating tank at the front end of the feed pipe 9 for preheating. Then, according to the specific situation, the temperature, pressure, and other parameters of the thin film evaporator 1 are set. After that, the feed valve installed on the feed pipe 9 is opened, and the preheated methylhydrazine reaction solution in the preheating tank is transported to the thin film evaporator 1 through the feed pipe 9. At the same time, the motor 2 is controlled by the controller or control box (the functions and structures of the controller or control box, as well as the connection settings, are well known in the art, so they are not described here, and they are not shown in the attached drawings). The motor 2 is turned on through the controller or control box. At this time, the scraper assembly 3 rotates at a speed of 200 r / min under the control of the motor 2, and the methylhydrazine reaction solution entering the thin film evaporator 1 is stirred under the rotation of the scraper assembly 3 at a speed of 200 r / min. Since the scraper of the scraper assembly 3 is in close contact with the inner wall of the thin film evaporator 1, the methylhydrazine reaction solution forms a thin film on the inner wall of the thin film evaporator 1 under the stirring of the scraper. Then, the controller or control box is turned on, and the hot medium in the hot medium storage tank enters the jacket 101 of the thin film evaporator 1 through the hot medium inlet pipe 11 to heat the thin film on the inner wall of the thin film evaporator 1. The thin film evaporates and dries under the heating of the hot medium. The liquid material after evaporation and drying is hydrazine hydrochloride, which is discharged into the hydrazine hydrochloride purification tank 4 through the discharge pipe of the thin film evaporator 1 and the feed pipe of the hydrazine hydrochloride purification tank 4. When the liquid in the hydrazine hydrochloride purification tank 4 reaches one-third of the device volume, the steam in the steam generator connected to the hydrazine hydrochloride purification tank 4 is introduced into the tank through the flow regulating valve 13. After collecting enough hydrazine hydrochloride in the hydrazine hydrochloride purification tank 4, the hydrazine hydrochloride is directly used in the production of methylhydrazine by opening the discharge valve A12. During the thin film evaporation and drying process, a gas-liquid mixture is produced, which is fractionated into the condenser. The gas-liquid mixture enters the first-stage condenser 5 through the gas outlet pipe of the thin film evaporator 1 and the gas inlet pipe of the first-stage condenser 5 for heat exchange treatment. The temperature of the gas-liquid mixture is measured by the temperature probe 15 to help adjust the operating parameters in a timely manner to optimize the separation effect. The liquid material formed after the gas-liquid mixture in the first-stage condenser 5 is condensed by -5 to -10°C water is hydrazine hydrate, which is discharged into the hydrazine hydrate recovery tank 6 through the discharge pipe of the first-stage condenser 5 and the feed pipe of the hydrazine hydrate recovery tank 6. After collecting enough hydrazine hydrate in the hydrazine hydrate recovery tank 6, the hydrazine hydrate is directly used in the production of methylhydrazine by opening the discharge valve B18.The gas carrying the mixture of methylhydrazine, methanol and other materials after heat exchange treatment will enter the second stage condenser 7 through the outlet pipe of the first stage condenser 5 and the inlet pipe of the second stage condenser 7 to continue heat exchange treatment. The gas carrying the mixture of methylhydrazine, methanol and other materials in the second stage condenser 7 will be condensed by -5 to -10℃ water to form liquid materials, which are the mixture of methylhydrazine, methanol and other materials. The mixture of methylhydrazine, methanol and other materials will enter the mixture collection tank 8 through the outlet pipe of the second stage condenser 7 and the inlet pipe of the mixture collection tank 8. When the mixture collection tank 8 collects enough mixture of methylhydrazine, methanol and other materials, the discharge valve C19 is opened to collect and recycle the mixture of methylhydrazine, methanol and other materials. The waste gas generated by heat exchange is removed under the negative pressure of the vacuum pump. The waste gas is collected and treated after removal. The vacuum degree is monitored by the vacuum degree probe 17 during waste gas removal to ensure the stability and safety of the gas-liquid separation process, thereby further improving the quality and recovery efficiency of the product.

[0032] When the recovery of hydrazine hydrochloride and hydrazine hydrate is completed, the operator needs to close the feed pump connected to the output channel of the mixed liquid storage tank, stop the delivery of mixed liquid into the thin film evaporator 1, close the flow regulating valve 13 to stop the steam from entering the hydrazine hydrochloride purification tank 4, then close the motor 2 to stop the rotation of the scraper assembly 3, then close the heat medium storage tank, and then the heat medium in the jacket 101 of the thin film evaporator 1 is returned to the heat medium storage tank through the heat medium outlet pipe 10, then the first stage condenser 5 and the second stage condenser 7 are closed to stop heat exchange treatment, then the discharge valves A12, B18 and C19 are closed to stop discharging, then the vacuum pump is closed and nitrogen is introduced into the vacuum pipe to break the vacuum, while the separated hydrazine hydrochloride and hydrazine hydrate are continuously used in the production of methylhydrazine, the separated mixture of methylhydrazine, methanol and other materials is stored, and finally clean water is introduced to clean the equipment. After cleaning, the power is turned off, and the equipment is closed after the temperature drops to room temperature.

[0033] The following is a data statistical table of multiple tests on recovered hydrazine hydrochloride using the hydrazine hydrochloride and hydrazine hydrate recovery device:

[0034] ;

[0035] As can be seen from the above table, when the feeding speed (pump speed of the feeding pump) is 60 ml / min, the evaporation temperature (heating temperature of the heat medium) is 130 DEG C, the preheating temperature (preheating temperature of the preheating tank) is 70 DEG C, the condensation temperature (temperature of the condenser) is -10 DEG C, the rotating speed (rotating speed of the scraper assembly) is 200 r / min, the vacuum degree (pressure of the vacuum pump) is 0.002 MPa, and water vapor is introduced, the content of hydrazine hydrate in the recovered hydrazine hydrate is low, only 1.28-1.52%, therefore, the hydrazine hydrate and hydrazine hydrate recovery device can ensure the purity of the recovered hydrazine hydrate. Example 2:

[0036] Please refer to Figures 1-5 As another object of the present application, a methylhydrazine production equipment is provided, wherein the above hydrazine hydrate and hydrazine hydrate recovery device is arranged in the methylhydrazine production equipment, the discharge pipe of the hydrazine hydrate purification tank 4 and the discharge pipe of the hydrazine hydrate recovery tank 6 are both connected to the front end of the methylhydrazine production equipment, and the rear end of the methylhydrazine production equipment is connected to the feeding pipe 9 of the membrane evaporator 1, therefore, the methylhydrazine production equipment can obtain any beneficial effect of the above hydrazine hydrate and hydrazine hydrate recovery device, which will not be described here again.

Claims

1. A hydrazine hydrochloride and hydrazine hydrate recovery apparatus comprising a thin film evaporator, characterized in that, The outlet pipe at the bottom end of the thin film evaporator is connected with a hydrazine hydrochloride purification tank, the gas outlet pipe at the upper end of one side of the thin film evaporator is connected with two-stage series-connected condensers, the bottom end of the first-stage condenser is connected with a hydrazine hydrate recovery tank and the gas outlet pipe thereof is connected with the gas inlet pipe of the second-stage condenser, and the bottom end of the second-stage condenser is connected with a mixture collection tank.

2. A hydrazine and hydrazine hydrate recovery apparatus according to claim 1, wherein The feed pipe at the top end of the hydrazine hydrochloride purification tank is fixedly connected with the outlet pipe at the bottom end of the thin film evaporator through flanges.

3. A hydrazine and hydrazine hydrate recovery apparatus according to claim 2, wherein A discharge valve A is installed on the outlet pipe at the bottom end of the hydrazine hydrochloride purification tank, a flow regulating valve is installed on the steam pipe at the upper side thereof, and a steam generator is connected through the flow regulating valve.

4. The hydrazine and hydrazine hydrate recovery apparatus of claim 1, wherein The gas outlet pipe at the upper side of the thin film evaporator is fixedly connected with the gas inlet pipe at the upper end of one side of the first-stage condenser through flanges, a temperature measuring pipe is connected with the gas inlet pipe of the first-stage condenser, and a temperature probe is placed in the temperature measuring pipe.

5. A hydrazine and hydrazine hydrate recovery apparatus according to claim 4, wherein The gas outlet pipe at the lower end of the other side of the first-stage condenser is fixedly connected with the gas inlet pipe at the lower end of one side of the second-stage condenser through flanges, and a vacuum pipe at the upper side of the other side of the second-stage condenser is connected with a vacuum pump.

6. A hydrazine and hydrazine hydrate recovery apparatus according to claim 5, wherein A vacuum degree measuring pipe is connected with the vacuum pipe, and a vacuum degree probe is placed in the vacuum degree measuring pipe.

7. A hydrazine and hydrazine hydrate recovery apparatus according to claim 1, wherein The feed pipe at the top end of the hydrazine hydrate recovery tank is fixedly connected with the outlet pipe at the bottom end of the first-stage condenser through flanges, and a discharge valve B is installed on the outlet pipe at the bottom end thereof.

8. The hydrazine and hydrazine hydrate recovery apparatus of claim 1, wherein The feed pipe at the top end of the mixture collection tank is fixedly connected with the outlet pipe at the bottom end of the second-stage condenser through flanges, and a discharge valve C is installed on the outlet pipe at the bottom end thereof.

9. The hydrazine and hydrazine hydrate recovery apparatus of claim 1, wherein A motor is fixedly connected with the top end of the thin film evaporator through flanges, the output end of the motor is rotationally connected with a scraper assembly, the scraper assembly is rotationally suspended in the interior of the thin film evaporator through the motor, and a feed pipe, a hot medium outlet pipe and a hot medium inlet pipe are sequentially connected with the other side of the thin film evaporator from top to bottom.

10. A methylhydrazine production plant, characterized by A hydrazine hydrochloride and hydrazine hydrate recovery device as claimed in any one of claims 1-9 is included, the outlet pipes of the hydrazine hydrochloride purification tank and the hydrazine hydrate recovery tank are connected with the front end of a methyl hydrazine production device, and the rear end of the methyl hydrazine production device is connected with the feed pipe of the thin film evaporator.

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