A steam jet low noise thermal pressure pump

Abstract

The present invention relates to the technical field of heat press pumps, specifically to a steam jet low-noise heat press pump, the other end of the nozzle on the pump body is connected to a perforated jet pipe, the other end of the perforated jet pipe is connected to a mixed steam exhaust pipe, the sound insulation layer and the perforated jet pipe and the partial section of the mixed steam exhaust pipe form a composite silencer chamber. When the working steam passes through the nozzle, its throat generates a local sound velocity, and at the same time the working steam reduces the temperature and generates a low pressure around the nozzle, the mixed steam is pressurized, and the temperature is further increased, so that the pressure and temperature of the mixed steam meet the requirements of using this mixed steam as a heat source. In this way, the used mixed steam contains a part of secondary steam that is no longer suitable for heating as a heat source, and now this part of the heat source is reused to heat and evaporate the material, the amount of steam in the used heat source becomes less, and the purpose of energy saving is achieved, with outstanding substantial characteristics and significant progress.

Description

Technical Field

[0001] The invention relates to the technical field of thermal pressure pumps, in particular to a steam jet low-noise thermal pressure pump. Background Art

[0002] Concentration equipment is widely used in various industrial productions, especially in the production of traditional Chinese medicine. A large number of ordinary double-effect concentrators are in use, which leads to common problems such as high energy consumption and high pollution in production. The goal is to improve the technical equipment level of green manufacturing in industry, especially traditional Chinese medicine, and promote industrial application. The research and development of technologies and equipment for energy saving, consumption reduction, and emission reduction in industrial and traditional Chinese medicine production, and the establishment of environmentally friendly production lines in industrial and traditional Chinese medicine production are the established goals of my country's industrial and traditional Chinese medicine modernization. In industrial and traditional Chinese medicine production, the concentration of aqueous solution materials is the most energy-consuming process. The selection of industrial and traditional Chinese medicine aqueous solution concentration equipment is the key to reducing energy consumption and emissions in industrial and traditional Chinese medicine production. Among the currently used concentration equipment, the most energy-saving concentration equipment is to compress secondary steam, increase its pressure and temperature, and use it as the first heat source. This equipment is divided into mechanical compression type and steam compression type, known as MVR and TVR, and MVR saves energy the most significantly. However, MVR is suitable for large factories and its cost is relatively high. Although TVR is not as energy-saving as MVR, it has a low cost and is suitable for medium and small factories. Since there are large, medium and small factories in my country's industry and Chinese medicine production, it is expected that MVR and TVR, two types of concentrating equipment, will be used in various factories in the future, but each factory will choose according to its own differences. At present, 98% of factories in my country's industrial production and Chinese medicine production are using ordinary double-effect concentrators, only a small number of large factories are trying MVR concentrators, and a small number of medium and small factories use TVR double-effect concentrators. The energy consumption of ordinary double-effect concentrators is: 0.57kg of steam is required to evaporate 1kg of water, and the energy consumption of TVR double-effect concentrators is: no more than 0.4kg of steam is required to evaporate 1kg of water. Compared with the ordinary double-effect concentrators, the TVR double-effect concentrators save energy, which is more obvious. At the same time, the cooling water of the ineffective secondary steam is saved by 30%, which basically achieves energy saving and emission reduction. However, the TVR two-effect concentrator has a large noise during operation, mostly 80∽85dB (A), which does not meet the noise requirements of the working environment. For this reason, we propose a steam jet low-noise hot pressure pump. Summary of the invention

[0003] The object of the present invention is to provide a steam jet low noise thermal pressure pump to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A steam jet low-noise hot pressure pump comprises a pump body, one end of the nozzle on the pump body is connected to a working steam pipe, the other end of the nozzle on the pump body is connected to a perforated jet pipe, one side of the upper end of the pump body is connected to a secondary steam suction pipe, the other end of the perforated jet pipe is connected to a mixed steam exhaust pipe, the working steam pipe, the pump body and the mixed steam exhaust pipe are circumferentially sleeved with a sound insulation layer, and the sound insulation layer and partial sections of the perforated jet pipe and the mixed steam exhaust pipe form a composite silencer cavity.

[0006] Preferably, the composite silencer chamber is composed of a mixing section, a throat section and a diffuser section, the mixing section is located in the circumference of the nozzle, the throat section is located in the circumference of the perforated injection pipe, and the diffuser section is located in the circumference of a section of the mixed steam exhaust pipe.

[0007] Preferably, the mixed steam exhaust pipe is composed of a truncated cone-shaped tube structure and a straight tube structure formed in an integrated manner, the diffuser section is located in the circumference of the truncated cone-shaped tube structure, and the diffuser section is a trumpet-shaped structure matching the truncated cone-shaped tube structure, and the circumference of the straight tube structure is sealed with the sound insulation layer.

[0008] Preferably, the composite silencing chamber and the perforated injection pipe together constitute a noise reduction structure of the thermal pressure pump.

[0009] Preferably, the mixing section of the composite silencer chamber is located at the lower end of the pump body and is provided with a first drain outlet, the lower end of the expansion section of the composite silencer chamber is provided with a second drain outlet, and the lower end of the sound insulation layer is penetrated by a drain pipe connected to the first drain outlet and the second drain outlet.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: when the working steam passes through the nozzle, its throat generates local sound velocity, and at the same time, the working steam reduces the temperature and generates low pressure around the nozzle, and this low pressure is determined by design. External low-pressure secondary steam needs to be inhaled. It is inhaled into the mixing chamber with a perforated injection tube through the secondary steam inhalation pipe. In the mixing chamber, the working steam and the low-pressure secondary steam are mixed to reduce the speed, and at the same time, the working steam reduces the temperature. When the mixed mixed steam passes through the throat of the perforated injection tube, the speed equalization is completed and the temperature equalization is completed. In the diffusion chamber with the perforated injection tube, the mixed steam is pressurized and the temperature is further increased, so that the pressure and temperature of the mixed steam meet the requirements of using this mixed steam as a heat source. In this way, the used mixed steam contains a part of the secondary steam that is no longer suitable for heating as a heat source, and now this part of the heat source is reused to heat and evaporate the material, and the amount of steam in the heat source used is reduced, achieving the purpose of energy saving. At the same time, due to the use of heat pumps, according to the heat balance calculation, the evaporation amount of the first effect and the second effect has changed, which reduces the amount of cold water used for condensing the ineffective secondary steam and saves the amount of cold water used in evaporation. It has outstanding substantial characteristics and significant progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the present invention.

[0012] In the figure: working steam pipe 1, nozzle 2, secondary steam suction pipe 3, pump body 4, perforated injection pipe 5, composite silencer chamber 6, first drain port 7, drain pipe 8, sound insulation layer 9, mixed steam discharge pipe 10. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0014] See also Figure 1 , the present invention provides a technical solution:

[0015] A steam jet low-noise thermal pressure pump comprises a pump body 4, one end of a nozzle 2 on the pump body 4 is connected to a working steam pipe 1, the other end of the nozzle 2 on the pump body 4 is connected to a perforated jet pipe 5, one side of the upper end of the pump body 4 is connected to a secondary steam suction pipe 3, the other end of the perforated jet pipe 5 is connected to a mixed steam discharge pipe 10, a sound insulation layer 9 is circumferentially sleeved on the working steam pipe 1, the pump body 4 and the mixed steam discharge pipe 10, the sound insulation layer 9 and partial sections of the perforated jet pipe 5 and the mixed steam discharge pipe 10 form a composite silencing chamber 6, the composite silencing chamber 6 is composed of a mixing section, a throat section and a diffuser section, the mixing section is located in the circumference of the nozzle 2, the throat section is located in the circumference of the perforated jet pipe 5, and the diffuser section is located in the circumference of a section of the mixed steam discharge pipe 10.

[0016] The mixed steam discharge pipe 10 is formed by an integrated molding of a truncated cone-shaped tube structure and a straight tube structure. The pressure diffuser section is located in the circumference of the truncated cone-shaped tube structure, and the pressure diffuser section is a trumpet-shaped structure that matches the truncated cone-shaped tube structure. The circumference of the straight tube structure is sealed with the sound insulation layer 9. The composite silencer chamber 6 and the perforated injection pipe 5 together constitute the noise reduction structure of the hot pressure pump. The mixing section of the composite silencer chamber 6 is located at the lower end of the pump body 4 and is provided with a first drain port 7. The lower end of the pressure diffuser section of the composite silencer chamber 6 is provided with a second drain port. The lower end of the sound insulation layer 9 is penetrated and plugged with a drain pipe 8 that is connected to the first drain port 7 and the second drain port.

[0017] The working steam flow from the nozzle 2 of the traditional heat pump reaches the local sound speed, mixes with the secondary steam sucked in in the mixing chamber of the first section of the perforated injection pipe 5, reaches the same speed of the two steam flows in the throat of the second section of the injection, and is pressurized and increased in temperature after the same speed in the third section of the perforated injection pipe 5, which is called mixed steam, and enters the first effect heating chamber to be used as a heat source. Since the steam passing through the nozzle 2 reaches the local sound speed, it generates noise formed by high-frequency waves, medium-frequency waves and low-frequency waves. This noise is usually at the level of (85∽95) dB (A) and has a great impact on the environment. The closed noise reduction cavity will eliminate the high-frequency waves entering the noise reduction cavity through the perforated injection pipe 5 through the composite silencer cavity 6 structure, that is, there are only medium-frequency waves and low-frequency waves in the closed noise reduction cavity, which greatly reduces the noise of the sonic steam flow ejected from the nozzle 2. According to the noise reduction theory, the two ends of the composite silencer chamber 6 must be connected to the working steam pipe 1 and the mixed steam exhaust pipe 10 through which the steam flows, forming a composite chamber that reduces noise. This causes the jet pipe to be broken into several sections, destroying the structure of the jet pipe in the heat pump design as a pipe formed by the mixing section, the throat and the expansion section, which has a great impact on the steam flow passing through, so that the heat pump cannot work well. The perforated jet pipe 5 is connected as a whole through the mixing section, the throat and the expansion section with a perforated pipe to form a noise reduction structure of the heat pump, which not only achieves the purpose of reducing noise, but also does not affect the steam flow through the perforated jet pipe 5, and does not change the flow state of the steam flow. At the same time, the integral perforated jet pipe is connected to the closed noise reduction cavity outside the pipe due to the perforation, forming a composite chamber, and avoiding the vibration of the closed noise reduction cavity outside the pipe when the steam flows through the perforated jet pipe 5, which affects the normal operation of the heat pump. When the heat pump is working, a small amount of the ordinary steam flow from the nozzle 2 does not flow into the mixing chamber of the first section of the perforated injection pipe 5, but flows into the pump body 4. When the steam flow condenses, water accumulates in the pump body 4, and the water is discharged from the equipment through the drain pipe 8. Heat pumps are widely used in energy saving and water saving of evaporation equipment, and have the characteristics of simple structure, low investment, and no need for maintenance and repair.

[0018] Implementation examples

[0019] In 2016, a pharmaceutical factory manufactured two sets of double-effect concentrators using steam jet low-noise heat pumps as heat sources, which have been in operation for about 3 years. All indicators have met the following requirements:

[0020] <1>. Evaporation steam consumption: met the design requirements.

[0021] <2>. Steam consumption for evaporation: 0.368kg steam / 1kg water, compared with 0.57kg steam / 1kg water of ordinary double-effect, the energy saving is.

[0022] <III>. Evaporation water saving: Due to the installation of heat pump, the second effect evaporation capacity becomes 0.355 of the total evaporation capacity, while the second effect evaporation capacity of ordinary double-effect evaporation capacity is 0.5 of the total evaporation capacity. Compared with the two:.

[0023] <IV> The double-effect concentrator composed of a steam jet low-noise pump has a noise level of 75dB(A), indicating that the noise reduction structure of the adopted hot pressure pump has achieved the noise reduction effect.

[0024] <V> The heat pump reaches stability during operation, indicating that the perforations of the injection pipe belt and the noise reduction cavity have reached a balanced state, which effectively eliminates vibration.

[0025] <Six>. There is no water accumulation in the heat pump, and all condensed water has been discharged into the connected equipment.

[0026] When the working steam passes through the nozzle 2, the throat generates local sonic velocity, and at the same time, the working steam reduces the temperature and generates low pressure around the nozzle 2, which is determined by design. External low-pressure secondary steam needs to be inhaled. It is inhaled into the mixing chamber with the perforated injection tube 5 through the secondary steam inhalation pipe 3. In the mixing chamber, the working steam and the low-pressure secondary steam are mixed to reduce the speed, and at the same time, the working steam reduces the temperature. When the mixed mixed steam passes through the throat of the perforated injection tube 5, the speed and temperature are equalized. In the expansion chamber with the perforated injection tube 5, the mixed steam is pressurized and the temperature is further increased, so that the pressure and temperature of the mixed steam meet the requirements of using this mixed steam as a heat source. In this way, the used mixed steam contains a part of the secondary steam that is no longer suitable for heating as a heat source, and now this part of the heat source is reused to heat and evaporate the material, and the amount of steam in the heat source used is reduced, achieving the purpose of energy saving. At the same time, due to the use of heat pumps, according to the heat balance calculation, the evaporation amount of the first effect and the second effect has changed, which reduces the amount of cold water used for condensing the ineffective secondary steam and saves the amount of cold water used in evaporation. It has outstanding substantial characteristics and significant progress.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for operating a steam jet low noise thermal pressure pump, the steam jet low noise thermal pressure pump comprising a pump body (4), characterized in that: One end of the nozzle (2) on the pump body (4) is connected to a working steam pipe (1), and the other end of the nozzle (2) on the pump body (4) is connected to a perforated injection pipe (5). One side of the upper end of the pump body (4) is connected to a secondary steam suction pipe (3), and the other end of the perforated injection pipe (5) is connected to a mixed steam discharge pipe (10). A sound insulation layer (9) is provided around the working steam pipe (1), the pump body (4) and the mixed steam discharge pipe (10). The sound insulation layer (9) and partial sections of the perforated injection pipe (5) and the mixed steam discharge pipe (10) form a composite muffler chamber (6); The composite muffler chamber (6) is composed of a mixing section, a throat section and a diffuser section, wherein the mixing section is located in the circumference of the nozzle (2), the throat section is located in the circumference of the perforated injection pipe (5), and the diffuser section is located in the circumference of a section of the mixed steam discharge pipe (10); The mixing section of the composite muffler chamber (6) is located at the lower end of the pump body (4) and is provided with a first drain port (7); the lower end of the expansion section of the composite muffler chamber (6) is provided with a second drain port; and the lower end of the sound insulation layer (9) is penetrated and plugged with a drain pipe (8) that is in communication with the first drain port (7) and the second drain port; The mixed steam discharge pipe (10) is formed by integrating a truncated cone-shaped tube structure and a straight tube structure, the pressure diffuser section is located in the circumference of the truncated cone-shaped tube structure, and the pressure diffuser section is a trumpet-shaped structure matching the truncated cone-shaped tube structure, and the circumference of the straight tube structure is in close contact with the sound insulation layer (9) and sealed; The composite silencing chamber (6) and the perforated injection pipe (5) together form a noise reduction structure of the heat pressure pump; When the working steam passes through the nozzle, the throat generates local sound velocity, and the temperature of the working steam is reduced, and low pressure is generated around the nozzle, which is determined by design; the external low-pressure secondary steam to be inhaled is inhaled into the mixing chamber with the perforated injection pipe through the secondary steam inhalation pipe; in the mixing chamber, the working steam and the low-pressure secondary steam are mixed to reduce the speed, and at the same time, the working steam reduces the temperature; when the mixed mixed steam passes through the throat of the perforated injection pipe, the speed and temperature are equalized; in the expansion chamber with the perforated injection pipe, the mixed steam is pressurized and the temperature is further increased, so that the pressure and temperature of the mixed steam meet the requirements of using this mixed steam as a heat source; the used mixed steam contains a part of the secondary steam that is not suitable for heating, and now this part of the heat source is reused to heat and evaporate the material, and the amount of steam in the used heat source becomes less, achieving the purpose of saving energy; at the same time, due to the use of the heat pump, according to the heat balance calculation, the evaporation amount of the first effect and the second effect changes, so that the amount of cold water used for the condensed secondary steam is reduced, and the amount of cold water used in evaporation is saved.

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