WO2016064363A1

WO2016064363A1 - Wastewater treatment, energy recovery, and water recycling facility

Info

Publication number: WO2016064363A1
Application number: PCT/TR2015/050142
Authority: WO
Inventors: Mustafa GÜMÜŞ
Original assignee: Gümüş Mustafa
Priority date: 2014-10-21
Filing date: 2015-10-16
Publication date: 2016-04-28

Abstract

The invention is about recycling water and recovering energy, and a wastewater treatment, energy recovery, and water recycling facility that contains an evaporator (5) which evaporates wastewater by exposing it to hot gases generated by burning and leaves solid particles on bottom, a burner (6) that provides required energy for evaporation by using natural gas or LPG as fuel, and a separator (8) that separates condensing water vapor and gases obtained by burning, to treat wastewater that contains high levels of salts, heavy metals, dyeing material, and solid particles such as in wastewater from textile establishments as well as making it possible to utilize most of the energy that is needed for this procedure.

Description

Wastewater Treatment, Energy Recovery, and Water Recycling Facility Technical Field

The invention is about recycling water and recovering energy, and a wastewater treatment, energy recovery, and water recycling facility that makes it possible to treat wastewater that contains high levels of salts, heavy metals, dyeing material, and solid particles such as wastewater from textile establishments as well as making it possible to utilize most of the energy that is needed for this procedure.

State of the Art

Wastewater treatment, and recycling of water and recovery of energy relies on the core principle of mixing wastewater with household waste and thus creating an environment in which bacteria can live, and then separation of solid particles through precipitation. This procedure requires large amounts of household waste to be mixed into the wastewater. In addition, the process requires large aeration systems, whereas pools and auxiliary facilities can only accomplish partial treatment, particularly failing to lower the salinity levels of the wastewater to desired levels. Furthermore, the water obtained at the end of this procedure cannot even be used in agricultural irrigation.

Some of the methods used in the treatment and recycling of extremely polluted wastewater are as follows:

In treatment by evaporation, pollutants that accumulate on heat transfer surfaces render the system unusable in short amounts of time.

- Chemical treatment: It is a wastewater treatment method in which, depending on the type of waste, contaminants are first suspended in water and then precipitated.

However, in this procedure operating costs are high and clean water quality is low.

- Reverse osmosis system: It is a wastewater treatment system in which wastewater is passed through special membranes under pressure. Depending on the type of waste, washing of the membranes in the cleaning phase requires high amounts of water and this cleaning water also needs to be treated. In addition, membrane lifespans and high pre-pressurization of water increases operating costs. An examination of the wastewater types and the processes used in textile dyeing plants which have a large share in producing wastewater show that only 20% of wastewater generated by textile dyeing plants are very dirty and this type of wastewater can be separated by using simple collection infrastructures, while the remaining 80% can be treated using conventional simple wastewater treatment methods.

Similar applications for wastewater treatment, energy recovery, and water recycling were found in the literature review that was conducted. The patent document with the publication number EP2225012B1 EPC is about a biological treatment facility pertaining to a setup for mechanical treatment, a wastewater treatment facility that includes this type of wastewater treatment facilities and a method for wastewater treatment. Arrangement of the setup for mechanical treatment on the biological treatment setup profile would decrease the area and volume requirements of the facility.

The patent document with the application number TR2003/021 1 1 is about a facility for the treatment of wastewater, regeneration of natural or synthetic adsorbents, and recycling of industrially important materials. Said facility includes treatment tanks containing natural or synthetic adsorbents which are saturated by industrially important materials in wastewater coming from agricultural industrial facilities, that are then dumped from said tanks into extraction tanks in which they are regenerated by special elements.

As a result, innovations pertaining to wastewater treatment and energy recovery are being implemented, and thus new setups that would eliminate said disadvantages and solve issues that are faced in current systems are needed.

Purpose of the Invention

The primary purpose of this invention is to separate wastewater from contaminants by heating and subsequent evaporation.

Another purpose of the invention is to recover the energy expended to evaporation and reusing the recovering energy in useful ways in thermal processes in the plant. Another purpose of the invention is to avoid the use of a heat transfer surface in the evaporation of wastewater, which is the case in current systems, thereby preventing the problems experienced in heat transfer surfaces due to accumulation of contaminants. Another purpose of the invention is to recycle the evaporated water by storing it as distilled water in the plant to be used for any subsequent need that involves the use of liquid water. In order to achieve the purposes stated above, said wastewater treatment, energy recovery, and water recycling facility comprising an evaporator that provides evaporation due to the dirty or clean water's being exposed to hot gases obtained by direct flame or burning and separation of solid particles on bottom; a burner that provides required energy for evaporation by using natural gas or LPG as fuel, and a separator that separates condensing water vapor and gases obtained by burning.

Explanatory Figures

Figure-1 is a general schematic view of the wastewater, energy recovery, and water recycling facility. The figures need not necessarily be scaled, and some details that are not necessary to explain the workings of the invention can be omitted. In addition, exactly identical or nearly identical components are shown with the same numbers.

Description of Reference Numbers for Pieces

A. Wastewater treatment, energy recover and 10. Clean water tank

water recycling facility 11. Pump

1. Liquid process machine 12. Waste gas exchanger

2. Particle filter 13. Condensate tank

3. Wastewater collection tank 14. Feed pump

4. Wastewater pump 15. Q1 waste energy usage points

5. Evaporator 16. Q2 waste energy usage points

6. Burner 17. Chimney

7. Waste energy exchanger 18. Separation valve

8. Separator

9. Ecomost filter Detailed Description of the Invention

In this detailed description, preferred embodiments of the wastewater treatment, energy recovery, and water recycling facility (A) that is the subject matter of the invention are explained to better clarify the subject matter, and should not be perceived as limiting in any way.

The invention is about a wastewater treatment, energy recovery, and water recycling facility (A) that allows for the treatment of wastewater which contains excessive amounts of salts, dyeing materials, and solid particles particularly from textile plants; and which making it possible to utilize most of the energy that is needed for this procedure.

Figure 1 demonstrates a representative drawing of the wastewater treatment, energy recovery, and water recycling plant (A). Accordingly, the wastewater treatment, energy recovery, and water recycling plant (A) includes a liquid process machine (1 ) in which cloth, metal, etc. are processed with water and chemicals. In front of the said liquid process machine (A) is a particle filter (2) that filters the wastewater and separates contaminants that are 0.5 mm or larger in size. A wastewater collection tank (3) is placed at the outlet of the said particle filter (2) to collect the wastewater to be treated. At the outlet of the said wastewater collection tank (3) there is a dirty water pump (4) reaching dirty water to pulverize pressurize and pumping it to evaporator (5).

As seen in Figure 1 , said wastewater treatment, energy recovery, and water recycling plant (A) contains an evaporator (5) that provides evaporation due to the dirty or clean water's being exposed to hot gases obtained by direct flame or burning and separation of solid particles on bottom. And contains a burner (6) that connected to said evaporator (5) and that provides required energy for evaporation by using natural gas or LPG as fuel.

As seen in Figure 1 , said wastewater treatment, energy recovery, and water recycling plant (A) contains a waste energy exchanger (7) that transfers the energy of water vapor and gases obtained by burning to water to produce water vapor. It also contains a separator (8) that separates condensed water vapor and gases obtained by burning. At the outlet of said separator (8) is an ecomost filter (9) that obtained by fabric soaked with chemical retainers, and that captures dyeing materials that might have been carried with water.

As seen in Figure 1 , said wastewater treatment, energy recovery, and water recycling plant (A) contains a clean water tank (10) in which the clean water that comes out of the ecomost filter (9). There is a pump (1 1 ) that feeds the water collected in said clean water tank (10) to clean water lines. It contains a waste gas exchanger (12) that recovers energy by transmitting the leftover energy of gases obtained by burning to burning air. A feeding pump (14) pumps clean water to the said waste energy exchanger (7).

As seen in Figure 1 , said wastewater treatment, energy recovery, and water recycling plant (A) contains a condensate tank (13) that produces clean water vapor. It contains Q1 waste energy usage points (15) which are entirely made of stainless steel and to which water vapor obtained from evaporation and gases obtained from burning can be fed, and it contains Q2 waste energy usage points (16) which contain heat transfer surfaces which can be affected from the mixture of water vapor gases obtained from burning.

As seen in Figure 1 , said wastewater treatment, energy recovery, and water recycling plant (A) contains a chimney (17) that removes the gases obtained through cold burning. It contains a separation valve (18) that directly sends liquors that do not have environmental impact or can be treated easily with the current treatment infrastructure to drainage, and that sends heavy pollutant liquors from the liquid process machine (1 ) to the particle filter (2).

In accordance with the information provided above, the working principle of the wastewater treatment, energy recovery, and water recycling plant (A) is as follows.

As seen in Figure 1 , clean water that is taken into the liquid process machine (1 ) is mixed with dyeing materials, salt, cleaning agents, etc. to form a liquor. Depending on the process, liquors that do not have environmental impact or that can be treated easily with the current treatment infrastructure are sent directly to drainage by the separation valve (18). On the other hand, heavy pollutant liquors are sent from liquid process machine (1 ) to particle filter (2), then heavy pollutants are removed and collected in wastewater collection tank (3).

After that, depending on the need for heating energy, dirty water pump (4) pressurizes the dirty water present in the dirty water tank (3) until it reaches pulverization pressure and pumps it to evaporator (5). Here, dirty water that is pulverized by sprayed from nozzles is separated into vapor and solid particles by meeting gases after burning obtained the burner (6). Solid particles that are collected at the bottom of the evaporator (5) are moved by a screw type belt to the particle car outside. Dirty water which doesn't vaporize and remain as liquid can return to the dirty water collection tank (3). As seen in Figure 1 , evaporator (5) be operated alone by spraying clean water, as a generator of low pressure vapor and gases obtained through burning, and this heating fluid can be used in plants, process lines or machines which have stainless heat transfer cells and installation, as heating fluid which have energy.

The burner (6) is operated proportional in accordance with the temperature of gas mixture obtained by burning and the water vapor at the outlet of the evaporator (5). The temperature level is the minimum temperature level needed in the plant. Burning air vent operates at a pressure sufficient to move the gas mixture to Q1 energy usage points (15) or to waste energy exchanger (7).

As seen in Figure 1 , all or some of the energy loaded vapor and gas mixture coming out of the evaporator (5) follows route I through entirely stainless steel pipes and arrives as Q1 energy usage points as a heating fluid. Said energy loaded vapor and gas mixture loses most of its energy here and arrives at the separator (8) as water and gas mixture. Water is then separated from the gas at the said separator (8) as a result of burning.

Water is separated from dyeing materials that may have been carried along with water vapor at the ecosmart filter (9) and is sent to the water tank (10) where it can be used. Then, clean water that is in the clean water tank (10) is pumped to the waterworks by the clean water pump (1 1 ). Gases that have been separated at the separator (8) and that are still partially warm transform most of the energy to burning air in the waste gas exchanger (12) and are discharged from the chimney as cold gases resulting from burning. Or, all or some of the water vapor and gas mixture that comes out of the evaporator (5) goes to the waste energy exchanger (7) which is entirely made of stainless steel. Here it transforms its energy to water and evaporates it. The clean vapor that is thus obtained is then used at Q2 energy usage points (16). The fluid that has transferred most of its energy to water in the waste energy exchanger (7) and thus became a mixture of water + gases obtained by burning is separated in the separator (8) and follows the former routes and arrives the chimney and clean water tank (10).

All warm surfaces are isolated. Thereby, treatment without loss of energy, except for losses due to isolation and small motor energies, is achieved.

Claims

A wastewater treatment and energy recovery facility (A) that makes it possible to treat wastewater that contains high levels of salts, heavy metals, dyeing material, and solid particles, particularly wastewater from textile establishments and making it possible to utilize most of the energy that is needed for this procedure; characterized in that;

- an evaporator (5) that provides evaporation due to the dirty or clean water's being exposed to hot gases obtained by direct flame or burning and separation of solid particles on bottom,

- a burner (6) that provides required energy for evaporation by using natural gas or LPG as fuel, and

- a separator (8) that separates condensing water vapor and gases obtained by burning.

The wastewater treatment, energy recovery, and water recycling facility (A) according to Claim 1 , characterized in comprising a waste energy exchanger (7) that transfers the energy of water vapor and gases obtained by burning to water to produce water vapor.

The wastewater treatment, energy recovery, and water recycling facility (A) according to Claim 1 , characterized in comprising a waste gas exchanger (12) that recovers energy by transmitting the leftover energy of gases obtained by burning to burning air.

The wastewater treatment, energy recovery, and water recycling facility (A) according to Claim 1 , characterized in comprising a separation valve (18) that directly sends liquors that do not have environmental impact or can be treated easily with the current treatment infrastructure to drainage, and that sends heavy pollutant liquors from the liquid process machine (1 ) to the particle filter (2).