CN213628197U

CN213628197U - Spray absorption type vacuumizing unit

Info

Publication number: CN213628197U
Application number: CN202022260785.XU
Authority: CN
Inventors: 陈燕强; 史春荣; 陈涛
Original assignee: Ningxia Changrong Environmental Protection Technology Co ltd
Current assignee: Ningxia Changrong Environmental Protection Technology Co ltd
Priority date: 2020-10-12
Filing date: 2020-10-12
Publication date: 2021-07-06
Anticipated expiration: 2030-10-12

Abstract

The utility model provides a spray absorption type vacuumizing unit, which comprises a vacuumizing device, a water cooling device and a spray absorption device, wherein the vacuumizing device comprises a vacuumizing box body and an ejector, a cooling array pipe is arranged inside the vacuumizing box body, the ejector comprises a Venturi tube, an exhaust pipe and a three-way valve, the water cooling device comprises a water tank, a cooling coil pipe, a water pump and a water return pipe, the spray absorption device comprises a spray tower and a negative pressure fan, the spray tower comprises a tower body and a water supply device arranged at the bottom of the tower body, two packing layers are arranged inside the tower body, a group of spray devices are arranged above each packing layer, the water supply device comprises a second water tank, a power pump, a water main pipe and a plurality of branch pipes, the scheme utilizes the ejector to form negative pressure suction on gas, negative pressure suction force is provided for the equipment to be vacuumized, gas can be absorbed once through the vacuumizing device, and part of, and performing secondary neutralization absorption on the gas through a spraying absorption device.

Description

Spray absorption type vacuumizing unit

Technical Field

The utility model relates to a plastic negative pressure evacuation technical field especially relates to an absorption formula evacuation unit sprays.

Background

Conveying of corrosive gases and liquids becomes an urgent problem to be solved in the chemical industry. In the prior art, metal equipment is generally adopted to realize the operation and the transportation of the whole-line equipment, in order to prevent corrosion, all inner walls of the metal equipment, which are in contact with corrosive liquid, are covered with a corrosion-preventing layer, for example, a plastic layer, and a steel-plastic layer structure is also adopted, but in long-term use, the corrosion leakage of the equipment cannot be avoided.

The full plastic product is made of materials such as polyvinyl chloride, polyethylene, polystyrene and the like, and has strong acid and alkali substance corrosion resistance.

The waste gas or tail gas in chemical production has complex component content and contains more corrosive gas, a negative pressure vacuum state needs to be kept in some production, the existing vacuum pumping technology is vacuum pump pumping, but the vacuum pump is made of metal materials, is easy to corrode, has short service life, and is very necessary for how to provide equipment which is completely corrosion-resistant, can pump vacuum, has large waste gas treatment capacity and is suitable for the chemical industry.

Disclosure of Invention

There is a need for a spray absorption vacuum extractor.

A spray absorption type vacuumizing unit comprises a vacuumizing device, a water cooling device and a spray absorption device, wherein the vacuumizing device comprises a vacuumizing box body and an ejector, the vacuumizing box body is a sealed box body, an air suction opening is formed above the side part of the vacuumizing box body, an air outlet is formed below the side part of the vacuumizing box body, cooling tubes are arranged inside the vacuumizing box body, the upper end and the lower end of each cooling tube are not in contact with the upper part and the lower part of the vacuumizing box body to form an upper vacuumizing cavity and a lower vacuumizing cavity, the upper vacuumizing cavity and the lower vacuumizing cavity are communicated with the cooling tubes to form tube passes, gas is introduced into the tube passes, shell passes are formed between adjacent cooling tubes and communicated with the side wall of the vacuumizing box body, a cooling water inlet and a cooling water outlet which are opposite to each other are formed on the side wall of the shell passes, and cooling water is introduced into the shell passes, the ejector comprises a Venturi tube, an exhaust pipe and a three-way valve, the exhaust pipe penetrates through the vacuumizing box body, the upper end of the exhaust pipe is exposed above the vacuumizing box body, the lower end of the exhaust pipe is connected with the bottom of the vacuumizing box body, the lower end of the exhaust pipe is communicated with a water cooling device, an exhaust port is formed in the upper portion of the exhaust pipe, the Venturi tube and the exhaust pipe are coaxially and concentrically assembled, the outlet of the Venturi tube is communicated with the water cooling device, a first port of the three-way valve is communicated with the inlet of the Venturi tube, a second port of the three-way valve is communicated with the water cooling device, a third port of the three-way valve is communicated with an air suction cavity in the lower portion of the vacuumizing box body through an air return pipe, the water cooling device comprises a cooling water tank, a cooling coil pipe, a water pump and a water return pipe, the inlet of the water pump is connected with the water outlet of the cooling water tank, the outlet of the water pump is connected with the lower end of the return pipe, the upper end of the return pipe is connected with the second port of the three-way valve, the cooling coil is arranged in the cooling water tank, the inlet and the outlet of the cooling coil penetrate through the side wall of the cooling water tank and are exposed outside, the spray absorption device comprises a spray tower and a negative pressure fan, the spray tower comprises a tower body and a water supplier arranged at the bottom of the tower body, the top of the tower body is provided with a gas phase outlet to be connected with the negative pressure fan, the lower part of the tower body is provided with a gas phase inlet to be connected with the exhaust port of the vacuumizing box body, two packing layers are arranged in the tower body, a group of sprayers is arranged above each packing layer, the water supplier comprises a second water tank, a power pump, a main water, the water main is also connected with a plurality of branch pipes, and the end parts of the branch pipes are positioned in the tower body and are connected with the sprayer.

Preferably, the outlet height of the venturi tube is higher than the lower port of the exhaust pipe, so that a height difference is formed between the outlet of the venturi tube and the outlet of the exhaust pipe, the venturi tube is used for enabling gas to move upwards and be discharged along the exhaust pipe, and the flow of the gas entering the cooling water tank is reduced.

Preferably, the venturi includes efflux portion and gentle class portion, efflux portion is big-end-up's taper pipe, and the unhurried current pipe is big-end-up's reducer pipe.

Preferably, a first liquid level meter is further arranged on the side wall of the cooling water tank and used for detecting the water level inside the cooling water tank.

Preferably, the upper part of the side wall of the cooling water tank is provided with a water replenishing port for replenishing water.

Preferably, the bottom of the side wall of the cooling water tank is provided with a sewage draining outlet for discharging impurities or cleaning the cooling water tank.

Preferably, the sprayer is a spray head.

Preferably, a second liquid level meter is further provided on the side wall of the second tank for detecting the water level inside the second tank.

Preferably, a sieve plate is arranged at the top inside the tower body, water-cooling coil pipes are arranged on the sieve plate, and space between the water-cooling coil pipes is filled with Raschig rings.

The utility model discloses utilize the ejector to form the negative pressure suction to gas, for treating that evacuation equipment provides the negative pressure suction power, can also carry out absorption once to gas through evacuating device, make partial gas by the desorption absorption, carry out the secondary through spraying absorbing device and spray the neutralization absorption to gas. The amount of the absorption gas treated by the spray tower in the scheme is increased, and 1-2 vacuumizing devices and water cooling devices can be matched with one spray tower according to production requirements.

Drawings

Fig. 1 is a schematic structural diagram of the unit.

Fig. 2 is a schematic structural view of the sieve plate 313 and the water-cooling coil 314.

In the figure: the device comprises a vacuumizing box body 11, an air suction opening 111, an air outlet 112, a cooling tube array 113, an upper air suction cavity 114, a lower air suction cavity 115, a cooling water inlet 116, a cooling water outlet 117, a Venturi tube 12, a jet flow part 121, a slow flow part 122, an exhaust pipe 13, an exhaust port 131, a three-way valve 14, an air return pipe 15, a cooling water tank 21, a water outlet 211, a cooling coil 22, a water pump 23, a water return pipe 24, a first liquid level meter 25, a water replenishing opening 26, a sewage discharge opening 27, a tower body 31, a packing layer 311, a sprayer 312, a sieve plate 313, a water cooling coil 314, a Raschig ring 315, a second water tank 321, a power pump 322, a main water pipe 323, a branch pipe 324 and.

Detailed Description

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Referring to fig. 1 and 2, an embodiment of the present invention provides a spray absorption type vacuum pumping unit, which includes a vacuum pumping device, a water cooling device, and a spray absorption device, wherein the vacuum pumping device includes a vacuum pumping box 11 and an ejector, the vacuum pumping box 11 is a sealed box, a pumping hole 111 is formed above a side portion of the vacuum pumping box 11, a gas outlet 112 is formed below the side portion of the vacuum pumping box 11, a cooling tube array 113 is arranged inside the vacuum pumping box 11, upper and lower ends of the cooling tube array 113 are not in contact with upper and lower portions of the vacuum pumping box 11 to form an upper pumping cavity 114 and a lower pumping cavity 115, the upper pumping cavity 114 and the lower pumping cavity 115 are communicated with the cooling tube array 113 to form a tube pass, gas is introduced inside the tube pass, a shell pass is formed between adjacent cooling tube arrays 113, the shell pass is communicated with a side wall of the vacuum pumping box 11, and a cooling water inlet 116 and a cooling water outlet 117 are formed on a side wall of the shell pass, the inside cooling water that is used for letting in of shell side, the ejector includes venturi 12, blast pipe 13, three-way valve 14, and blast pipe 13 runs through evacuation box 11 and sets up, and the upper end of blast pipe 13 exposes in evacuation box 11 top, and the lower extreme is connected with evacuation box 11 bottom, and the lower extreme and the water cooling plant of blast pipe 13 communicate, and gas vent 131 is seted up on the upper portion of blast pipe 13, and venturi 12 and the coaxial concentric assembly of blast pipe 13, venturi 12's export and water cooling plant intercommunication, the first port of three-way valve 14 and venturi 12's entry intercommunication, the second port be used for communicating with water cooling plant, and the third port is through muffler 15 and the lower part of evacuation box 11 air-out cavity 115 intercommunication, water cooling plant includes cooling water tank 21, cooling coil 22, water pump 23, wet return 24, cooling water tank 21 is sealed box, and cooling water tank 21 top and evacuation box 11 bottom are connected, the top of the cooling water tank 21 is provided with a port communicated with the exhaust pipe 13, the bottom of the side part of the cooling water tank 21 is provided with a water outlet 211, the inlet of the water pump 23 is connected with the water outlet 211 of the cooling water tank 21, the outlet is connected with the lower end of the return pipe 24, the upper end of the return pipe 24 is connected with the second port of the three-way valve 14, the cooling coil 22 is arranged in the cooling water tank 21, the inlet and the outlet of the cooling coil 22 penetrate through the side wall of the cooling water tank 21 and are exposed outside, the spraying absorption device comprises a spraying tower and a negative pressure fan, the spraying tower comprises a tower body 31 and a water supply device arranged at the bottom of the tower body 31, the top of the tower body 31 is provided with a gas phase outlet to be connected with the negative pressure fan, the lower part of the tower body 31 is provided with a gas phase inlet to be connected, the water supply device comprises a second water tank 321, a power pump 322, a water main 323 and a plurality of branch pipes 324, the circulating water tank is a closed box body, the water inlet end of the power pump 322 extends into the second water tank 321, the water outlet end is connected with the water main 323, the water main 323 is also connected with the branch pipes 324, and the end parts of the branch pipes 324 are positioned in the tower body 31 to be connected with the sprayer 312.

In the scheme, all parts are made of plastic materials, so that the problem that equipment is easy to corrode is fundamentally solved.

The utility model utilizes the power provided by the water pump 23 and the jet effect of the venturi tube 12 to suck the gas into the vacuum pumping box body 11, and the gas which has entered enters the jet device for the second time along the air return pipe 15 to form internal gas circulation; the whole unit only has one power source, namely the water pump 23, the water pump 23 is simple in structure and made of all-plastic materials, the water pump 23 pumps water in the cooling water tank 21 into the three-way valve 14, the water enters the ejector and is mixed with gas to form negative pressure suction force to the gas, the water in the cooling water tank 21 is recycled and secondarily utilized and is pumped into the ejector again for internal water circulation to form closed water circulation, the two internal circulations are combined ingeniously, negative pressure suction to the gas of external equipment is formed, and the whole process of the equipment is free of leakage and corrosion.

Meanwhile, the gas enters the vacuumizing box body 11 and is cooled by the cooling medium in the cooling tube array 113, so that the gas is cooled, and the temperature of the gas is reduced due to the fact that the gas of the external equipment continuously brings heat into the vacuumizing box body 11, so that the temperature is increased, the vacuum degree is reduced due to the temperature increase, the pressure in the vacuumizing box body 11 is increased, the circulating resistance is increased, the gas is cooled once by the cooling tube array 113, and the situation that the temperature is increased to influence the vacuum degree is avoided. In addition, the cooling coil 22 in the cooling water tank 21 carries out secondary cooling on the circulating water, and further reduces the temperature of the circulating water, so that the vacuum degree is prevented from being influenced by the temperature rise.

The structure not only utilizes the ejector to form negative pressure suction to the gas, but also can absorb the gas once through water, so that part of the gas is dissolved and absorbed.

Further, the outlet of the venturi tube 12 is higher than the lower port of the exhaust pipe 13, so that a height difference is formed between the outlet of the venturi tube 12 and the outlet of the exhaust pipe 13, and the outlet is used for the gas to move upwards and to be discharged along the exhaust pipe 13, thereby reducing the flow rate of the gas entering the cooling water tank 21.

Further, the venturi tube 12 includes a jet portion 121 and a slow flow portion 122, the jet portion 121 is a tapered tube with a large top and a small bottom, and the slow flow tube 122 is a tapered tube with a small top and a large bottom. The jet part forms the power of air suction, and enters the slow flow part, so that the turbulent impact of air and water is reduced, the water flows downwards, the air with lighter specific gravity floats upwards and is discharged along the evacuation port, and the amount of the air entering the cooling water tank 21 is reduced as much as possible.

Further, a first liquid level meter 25 is further arranged on the side wall of the cooling water tank 21 and used for detecting the water level inside the cooling water tank 21.

Further, a water replenishing port 26 is formed in the upper portion of the side wall of the cooling water tank 21 for replenishing water.

Further, a drain outlet 27 is formed in the bottom of the side wall of the cooling water tank 21 and used for discharging impurities or cleaning the cooling water tank 21.

Further, the sprayer 312 is a spray head.

Further, a second liquid level gauge 325 is further provided on a side wall of the second water tank 321 for detecting a water level inside the second water tank 321.

Furthermore, a sieve plate 313 is arranged at the top in the tower body, water-cooling coil pipes 314 are coiled on the sieve plate 313, and space between the water-cooling coil pipes 314 is filled with Raschig rings. The gas that gets into the tower body contacts with alkaline shower water, most is absorbed by water, because the gas brings a large amount of heats into, make the temperature rise vaporization of shower water, can be along with unabsorbed gas is discharged from the gaseous phase export in top of the tower, thereby the evaporation of moisture has been accelerated, the energy consumption of follow-up gas department has also been aggravated, so set up the sieve here, be used for the raschig ring, and the gas passes, the raschig ring has abundant surface area, cooled condensate water when steam contacts rather than inside, flow into the tower body once more, collected, the inside honour of water-cooling coil pipe leads to outside cooling water, the temperature is very low, accelerate the steam cooling, also can play the effect of raschig ring cooling.

The embodiment of the utility model provides a module or unit in the device can merge, divide and delete according to actual need.

The above disclosure is only a preferred embodiment of the present invention, which is not intended to limit the scope of the present invention, and the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It will be understood by those skilled in the art that all or part of the above-described embodiments may be implemented and equivalents thereof may be made to the claims of the present invention while remaining within the scope of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a spray absorption formula evacuation unit which characterized in that: the device comprises a vacuumizing device, a water cooling device and a spray absorption device, wherein the vacuumizing device comprises a vacuumizing box body and an ejector, the vacuumizing box body is a sealed box body, an air suction opening is formed above the side part of the vacuumizing box body and is used for being connected with external equipment to be vacuumized, an air outlet is formed below the side part of the vacuumizing box body, cooling tubes are arranged inside the vacuumizing box body, the upper end and the lower end of each cooling tube are not in contact with the upper part and the lower part of the vacuumizing box body to form an upper air suction cavity and a lower air suction cavity, the upper air suction cavity and the lower air suction cavity are communicated with the cooling tubes to form tube passes, gas is introduced into the tube passes, a shell pass is formed between adjacent cooling tubes, the shell pass is communicated with the side wall of the vacuumizing box body, a cooling water inlet and a cooling water outlet which are opposite to each other are formed on the side wall of the shell pass, and cooling water is introduced into the shell pass, the ejector comprises a Venturi tube, an exhaust pipe and a three-way valve, the exhaust pipe penetrates through the vacuumizing box body, the upper end of the exhaust pipe is exposed above the vacuumizing box body, the lower end of the exhaust pipe is connected with the bottom of the vacuumizing box body, the lower end of the exhaust pipe is communicated with a water cooling device, an exhaust port is formed in the upper portion of the exhaust pipe, the Venturi tube and the exhaust pipe are coaxially and concentrically assembled, the outlet of the Venturi tube is communicated with the water cooling device, a first port of the three-way valve is communicated with the inlet of the Venturi tube, a second port of the three-way valve is communicated with the water cooling device, a third port of the three-way valve is communicated with an air suction cavity in the lower portion of the vacuumizing box body through an air return pipe, the water cooling device comprises a cooling water tank, a cooling coil pipe, a water pump and a water return pipe, the inlet of the water pump is connected with the water outlet of the cooling water tank, the outlet of the water pump is connected with the lower end of the return pipe, the upper end of the return pipe is connected with the second port of the three-way valve, the cooling coil is arranged in the cooling water tank, the inlet and the outlet of the cooling coil penetrate through the side wall of the cooling water tank and are exposed outside, the spray absorption device comprises a spray tower and a negative pressure fan, the spray tower comprises a tower body and a water supplier arranged at the bottom of the tower body, the top of the tower body is provided with a gas phase outlet to be connected with the negative pressure fan, the lower part of the tower body is provided with a gas phase inlet to be connected with the exhaust port of the vacuumizing box body, two layers of packing layers are arranged in the tower body, a group of sprayers is arranged above each layer of packing layer, the water supplier comprises a second water tank, a power pump, a, the water main is connected with a plurality of branch pipes, the end parts of the branch pipes are positioned in the tower body to be connected with the sprayer, and the vacuumizing device, the water cooling device and the spraying absorption device are all made of plastic materials.

2. The spray absorption vacuum extractor assembly as set forth in claim 1, wherein: the outlet height of the Venturi tube is higher than the lower port part of the exhaust pipe, so that the outlet of the Venturi tube and the outlet of the exhaust pipe form a height difference, gas is discharged along the exhaust pipe in an upward moving mode, and the flow of the gas entering the cooling water tank is reduced.

3. The spray absorption vacuum extractor assembly as set forth in claim 2, wherein: the venturi includes efflux portion and gentle class portion, efflux portion is big-end-up's taper pipe, and the unhurried current pipe is big-end-up's reducer pipe.

4. The spray absorption vacuum extractor assembly as set forth in claim 1, wherein: still set up first level gauge on cooling water tank lateral wall for detect the inside water level of cooling water tank.

5. The spray absorption vacuum extractor assembly as set forth in claim 1, wherein: and a water replenishing port is formed in the upper part of the side wall of the cooling water tank and is used for replenishing water.

6. The spray absorption vacuum extractor assembly as set forth in claim 1, wherein: and a sewage draining outlet is formed in the bottom of the side wall of the cooling water tank and used for discharging impurities or cleaning the cooling water tank.

7. The spray absorption vacuum extractor assembly as set forth in claim 1, wherein: the sprayer is a spray head.

8. The spray absorption vacuum extractor assembly as set forth in claim 1, wherein: and a second liquid level meter is also arranged on the side wall of the second water tank and used for detecting the water level in the second water tank.

9. The spray absorption vacuum extractor assembly as set forth in claim 1, wherein: and a sieve plate is arranged at the top inside the tower body, water-cooling coil pipes are arranged on the sieve plate, and space between the water-cooling coil pipes is filled with Raschig rings.