CN205973788U - Regard as heat source to be used for device of hydrogen peroxide solution concentration production with steam heat pump - Google Patents

Abstract

The utility model discloses a device for hydrogen peroxide concentration production using a steam heat pump as a heat source, comprising a third pipeline, a vacuum valve is arranged on the third pipeline, one end of the third pipeline is connected The top of the distillation tower is fixedly connected, one side of the rectification tower is fixedly connected with a fourth pipe, the fourth pipe is provided with a pure water inlet valve, the bottom of the rectification tower is fixedly connected with an outlet pipe, and the other side of the rectification tower passes through The first pipeline is fixedly connected to one side of the falling film evaporator, the side of the falling film evaporator away from the first pipeline is fixedly connected to a sixth pipeline, and the sixth pipeline is provided with a third valve. The device has high energy-saving efficiency, which can reach 90%. Although the one-time investment is high and the maintenance cost is increased, and the power consumption is also high, the overall effect is very good. After operation, almost no steam is used, and the product cost and energy consumption are greatly reduced. This process Compared with the steam ejector energy-saving process, the energy consumption is saved by 51%, the coal consumption is reduced, and the environment is improved obviously.

Description

A device for hydrogen peroxide concentration production using a steam heat pump as a heat source

technical field

The utility model relates to the technical field of evaporation and rectification, in particular to a device for hydrogen peroxide concentration production using a steam heat pump as a heat source.

Background technique

Rectification is the most commonly used chemical unit operation, and it is also a unit operation with high energy consumption. Due to its wide application and many advantages, there is no non-thermal separation method that can replace it, especially in the process of hydrogen peroxide concentration. The process is irreplaceable. Traditional distillation energy-saving technologies often only take improvement measures on operating conditions and column separation internals, and have achieved certain results, but it is still impossible to fundamentally reduce energy consumption. In order to greatly reduce the energy consumption of the hydrogen peroxide distillation separation system, an efficient and energy-saving hydrogen peroxide distillation process should be constructed from the perspective of improving the process structure. If the energy consumption of the hydrogen peroxide distillation process is to be drastically reduced fundamentally, the consumption of power steam must be reduced. The only way to reduce power steam consumption is to directly compress the saturated steam with low-grade thermal energy enriched at the top of the rectification tower into saturated steam with high-grade thermal energy, and use this steam as the heat source of the evaporator.

Utility model content

The purpose of the utility model is to provide a steam heat pump as a heat source for the hydrogen peroxide concentration production device, which has the advantages of energy saving, consumption reduction and environmental improvement, and solves the problem of high energy consumption in the existing technology.

In order to achieve the above purpose, the utility model provides the following technical solutions: a device for hydrogen peroxide concentration production using a steam heat pump as a heat source, including a third pipeline, the third pipeline is provided with a vacuum valve, the third One end of the pipeline is fixedly connected to the top of the rectification tower, a fourth pipeline is fixedly connected to one side of the rectification tower, the fourth pipeline is provided with a pure water inlet valve, and the bottom of the rectification tower is fixedly connected to a Outlet pipeline, the other side of the rectification tower is fixedly connected with one side of the falling film evaporator through the first pipeline, and the side of the falling film evaporator away from the first pipeline is fixedly connected with the sixth pipeline, the first A third valve is arranged on the six pipes, the other side of the falling film evaporator is fixedly connected to one end of the condensate discharge pipe, and the side of the falling film evaporator away from the condensate discharge pipe is fixed to one end of the fifth pipe The fifth pipeline is respectively provided with a second valve, a secondary steam heat pump, an expansion joint, a primary steam heat pump, and a heat pump inlet valve. The upper surface of the fifth pipeline is fixedly connected with an eighth pipeline, and the eighth An anti-kick valve is set on the pipeline, the other end of the fifth pipeline is fixedly connected to the side of the rectification tower away from the first pipeline, the fifth pipeline is fixedly connected to one end of the second pipeline, and the second pipeline is fixedly connected to An injector inlet valve is provided, the other end of the second pipeline is fixedly connected to the steam injector, one end of the steam injector is fixedly connected to one end of the power steam pipe, and a regulating valve is arranged on the power steam pipe, so The other end of the steam injector is fixedly connected to one end of the seventh pipeline, the seventh pipeline is provided with a first valve, and the other end of the seventh pipeline is fixedly connected to the fifth pipeline.

Preferably, the first pipeline from the falling film evaporator to the rectification tower is a straight pipeline.

Preferably, there are two anti-kicking valves and eighth pipelines respectively, and the two anti-kicking valves and the eighth pipeline are respectively located directly above the first-stage steam heat pump and the second-stage steam heat pump.

Preferably, the positions of the second valve, the secondary steam heat pump, the expansion joint, the primary steam heat pump and the heat pump inlet valve are arranged sequentially from right to left.

Preferably, the inlet of the primary steam heat pump is provided with a flow meter and a regulating valve.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. The energy-saving efficiency of the device is high, which can reach 90%. Although the one-time investment is high and the maintenance cost is increased, and the power consumption is also high, the overall effect is very good. After operation, almost no steam is used, and the product cost and energy consumption are greatly reduced. Compared with the steam ejector energy-saving process, the process saves energy consumption by 51%, reduces coal consumption, and improves the environment significantly.

Description of drawings

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

In the figure: 1 steam injector, 2 regulating valve, 3 power steam pipe, 4 injector inlet valve, 5 heat pump inlet valve, 6 anti-kicking valve, 7 primary steam heat pump, 8 expansion joint, 9 secondary steam heat pump, 10 first valve, 11 second valve, 12 falling film evaporator, 13 third valve, 14 condensate discharge pipe, 15 first pipe, 16 second pipe, 17 vacuum valve, 18 pure water inlet valve, 19 fine Distillation tower, 20 outlet pipelines, 21 third pipelines, 22 fourth pipelines, 23 fifth pipelines, 24 sixth pipelines, 25 seventh pipelines, 26 eighth pipelines.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Fig. 1, a kind of device that uses steam heat pump as heat source for hydrogen peroxide concentration production, comprises the 3rd pipeline 21, is provided with vacuum valve 17 on the 3rd pipeline 21, and one end of the 3rd pipeline 21 is connected with rectifying tower 19 The top of the distillation tower 19 is a chemical equipment made of rare metal titanium and its alloy materials, which has the characteristics of high strength, high toughness, high temperature resistance, corrosion resistance and light specific gravity. One side of the rectification tower 19 is fixedly connected with The fourth pipeline 22, the fourth pipeline 22 is provided with a pure water inlet valve 18, the bottom of the rectification tower 19 is fixedly connected with an outlet pipeline 20, and the other side of the rectification tower 19 is connected to the falling film evaporator 12 through the first pipeline 15 One side of the falling film evaporator is fixedly connected, and the falling film evaporation is to add the feed liquid from the upper tube box of the heating chamber 12 of the falling film evaporator, and distribute it evenly into each heat exchange tube through the liquid distribution and film forming device. Down, it flows from top to bottom in a uniform film shape. During the flow process, it is heated and vaporized by the shell-side heating medium, and the generated steam and liquid phase enter the separation chamber of the evaporator together. After the vapor and liquid are fully separated, the steam enters the condenser to condense or Enter the next effect evaporator as a heating medium, thereby realizing multi-effect operation, and the liquid phase is discharged from the separation chamber. The first pipeline 15 from the falling film evaporator 12 to the rectifying tower 19 must be a straight pipe section, and the pressure at the top of the rectifying tower 19 It is generally controlled at 8kpa to 10kpa, so that the effective temperature difference of the falling film evaporator 12 is ten to twelve degrees, and the side of the falling film evaporator 12 away from the first pipeline 15 is fixedly connected with a sixth pipeline 24, and the sixth pipeline 24 is set There is a third valve 13, the other side of the falling film evaporator 12 is fixedly connected to one end of the condensate discharge pipe 14, and the side of the falling film evaporator 12 away from the condensate discharge pipe 14 is fixedly connected to one end of the fifth pipeline 23, The fifth pipeline 23 is respectively provided with a second valve 11, a secondary steam heat pump 9, an expansion joint 8, a primary steam heat pump 7 and a heat pump inlet valve 5, a second valve 11, a secondary steam heat pump 9, an expansion joint 8, a The positions of the first-stage steam heat pump 7 and the heat pump inlet valve 5 are arranged sequentially from right to left, and the condensate generated when the saturated steam generated by the first-stage steam heat pump 7 is supplied to the falling film evaporator 12 for heating is collected in the condensate collection tank. Use the condensate pump to send the condensate to the secondary steam heat pump 9 as humidification water. The steam inlet and outlet pipes of the primary steam heat pump 7 and the secondary steam heat pump 9 must be provided with expansion joints 8, and each inlet and outlet pipe must be at the lowest point. A discharge valve is provided to discharge steam condensed water in time, and both the first-stage steam heat pump 7 and the second-stage steam heat pump 9 are equipped with frequency conversion to adjust the speed, so as to adjust the outlet pressure and temperature, and the first-stage steam heat pump 7 and the second-stage steam heat pump 9 The high-speed blade material must be high-strength and corrosion-resistant titanium alloy. The upper surface of the fifth pipeline 23 is fixedly connected with the eighth pipeline 26, and the eighth pipeline 26 is provided with an anti-kick valve 6, an anti-kick valve 6 and a first There are two eight pipelines 26 respectively, and the two anti-kicking valves 6 and the eighth pipeline 26 are respectively located directly above the primary steam heat pump 7 and the secondary steam heat pump 9, and the other end of the fifth pipeline 23 is connected to the rectifying One side of the tower 19 away from the first pipeline 15 is fixedly connected, the fifth The pipe 23 is fixedly connected to one end of the second pipe 16, the second pipe 16 is provided with an ejector inlet valve 4, and the other end of the second pipe 16 is fixedly connected to the steam ejector 1, and the steam ejector 1 uses high-pressure fluid to pump Low-pressure fluid is used to increase the pressure of ejected fluid. It is widely used because of its simple and reliable structure and low operating cost, such as vacuum system, refrigeration cycle , chemical industry, propulsion system of rocket and jet aircraft, and core cooling system of nuclear power plant . etc., one end of the steam injector 1 is fixedly connected to one end of the power steam pipe 3, the power steam pipe 3 is provided with a regulating valve 2, and the inlet of the primary steam heat pump 7 is provided with a flow meter and a regulating valve 2 to control the primary steam heat pump 7 Stability of the outlet steam, the other end of the steam injector 1 is fixedly connected to one end of the seventh pipeline 25, the seventh pipeline 25 is provided with the first valve 10, and the other end of the seventh pipeline 25 is fixedly connected to the fifth pipeline 23.

Working principle: when starting up, the power steam pipe 3 draws 25-30% of the saturated steam generated in the rectification tower 19 to the top of the tower through the steam injector 1, and mixes it with the power steam from the boiler room to generate 75°C saturated steam Steam, for falling film evaporator 12 heating, when turning over to normal production, with steam injection, after 1 is switched to primary steam heat pump 7, primary steam heat pump 7 will 90% saturated steam produced in rectification tower 19 in tower After the top is pumped, it will be heated by the falling film evaporator 12 after being pressurized and humidified to become saturated steam.

Operation steps when starting up: close the heat pump inlet valve 5 and the second valve 11, then open the ejector inlet valve 4, the first valve 10 and the pure water inlet valve 18, then open the third valve 13 and the vacuum valve 17 to establish a vacuum in the system , then slowly open the regulating valve 2 to enter the power steam pipe 3, and adjust to the minimum flow rate of the operation regulation is about 70% of the design value, after the product at the bottom of the rectifying tower 19 is qualified, the system will find that the cycle is normal.

Operation steps during normal production: open the heat pump inlet valve 5 and the second valve 11, start the secondary steam heat pump 9, then start the primary steam heat pump 7, and then close the injector inlet valve 4, the first valve 10 and the regulating valve 2 to reduce The openings of the third valve 13 and the vacuum valve 17 are used to adjust the rotation speed of the secondary steam heat pump 9 to a rated value, and the excess steam is condensed by the steam condenser. Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes and modifications can be made to these embodiments without departing from the principle and spirit of the present invention , replacements and modifications, the scope of the present utility model is defined by the appended claims and their equivalents.

Claims (5)

1. a kind of device being used for the production of hydrogen peroxide concentration using steam heat pump as thermal source, including the 3rd pipeline (21), its feature It is：Vacuum pumping valve (17), one end of described 3rd pipeline (21) and rectifying column (19) are provided with described 3rd pipeline (21) Top be fixedly connected, the side of described rectifying column (19) is fixedly connected with the 4th pipeline (22), on described 4th pipeline (22) It is provided with purified water inlet valve (18), the bottom of described rectifying column (19) is fixedly connected with outlet conduit (20), described rectifying column (19) opposite side is fixedly connected with the side of falling film evaporator (12) by the first pipeline (15), described falling film evaporator (12) Side away from the first pipeline (15) is fixedly connected with the 6th pipeline (24), and described 6th pipeline (24) is provided with the 3rd valve (13), the opposite side of described falling film evaporator (12) is fixedly connected with one end of condensate discharge pipe (14), described falling film evaporation Device (12) is fixedly connected with one end of the 5th pipeline (23) away from the side of condensate discharge pipe (14), described 5th pipeline (23) On be respectively arranged with the second valve (11), second steam heat pump (9), expansion joint (8), one-level steam heat pump (7) and heat pump import Valve (5), described 5th pipeline (23) upper surface is fixedly connected with the 8th pipeline (26), and described 8th pipeline (26) is upper to arrange anti-kicking Shake valve (6), and the other end of described 5th pipeline (23) is fixedly connected away from the side of the first pipeline (15) with rectifying column (19), institute State the 5th pipeline (23) to be fixedly connected with one end of second pipe (16), described second pipe (16) is provided with ejector import Valve (4), the other end of described second pipe (16) is fixedly connected with steam jet ejector (1), one end of described steam jet ejector (1) It is fixedly connected with one end of power steam pipe (3), described power steam pipe (3) is provided with regulating valve (2), described steam injection The other end of device (1) is fixedly connected with one end of the 7th pipeline (25), and described 7th pipeline (25) is provided with the first valve (10), the other end of described 7th pipeline (25) is fixedly connected with the 5th pipeline (23).

2. a kind of device being used for the production of hydrogen peroxide concentration using steam heat pump as thermal source according to claim 1, it is special Levy and be：The first pipeline (15) that described falling film evaporator (12) arrives rectifying column (19) is straight pipeline.

3. a kind of device being used for the production of hydrogen peroxide concentration using steam heat pump as thermal source according to claim 1, it is special Levy and be：Described anti-kick the valve that shakes (6) and the quantity of the 8th pipeline (26) has two respectively, and two are prevented kicking the valve that shakes (6) and the 8th Pipeline (26) is located at the surface of one-level steam heat pump (7) and second steam heat pump (9) respectively.

4. a kind of device being used for the production of hydrogen peroxide concentration using steam heat pump as thermal source according to claim 1, it is special Levy and be：Described second valve (11), second steam heat pump (9), expansion joint (8), one-level steam heat pump (7) and heat pump inlet valve (5) position is to be arranged in order from right to left.

5. a kind of device being used for the production of hydrogen peroxide concentration using steam heat pump as thermal source according to claim 1, it is special Levy and be：The import of described one-level steam heat pump (7) is provided with effusion meter and regulating valve (2).